With Light Projection Patents (Class 378/206)
  • Patent number: 5921927
    Abstract: A method and apparatus accurately positions the apparatus at a selected cranial implant site for x-ray tomography of the mandible and/or maxilla and the temporomandibular joint. The method and apparatus comprise making a stent of the mandible and/or maxilla of a patient and making a mark on the stent at a position that corresponds to the selected dental implant site. The stent is then positioned on a fixating device and the x-ray imaging apparatus is positioned with regard to tomographic imaging so that (a) the mark on the stent is at the intersection of the projected cross light beam and (b) the arm of the cross is aligned with the tangent of the dental arch at the site of interest. This positioning data is input to a program that will then operate the positioning motors and the x-ray source to project the tomographic images of the selected site.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: July 13, 1999
    Assignee: Axialtome Australia Pty. Ltd.
    Inventor: Phillip C. McArdle
  • Patent number: 5878072
    Abstract: An alignment cross hair apparatus for partially eclipsing a laser beam includes a laser generator that emits a laser beam. A frame includes a pair of members that cross one another at an intersection within the frame. The frame is attachable to the laser generator in such a manner that the intersection of the members is within the laser beam so that the laser beam is partially eclipsed by the pair of members.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: March 2, 1999
    Assignee: SEH America, Inc.
    Inventor: Mark J. Greisz
  • Patent number: 5844962
    Abstract: The invention relates to an X-ray examination apparatus, including an X-ray source (3, 4) for generating X-rays and a diaphragm unit (5) which is connected to the X-ray source (3, 4) and includes shutters (6) which can be adjusted by a drive device (11, 12) so as to limit the radiation beam (100, 200) emanating from a first source (1) or from a second source (2), and a control unit (13) which controls the drive device. Correspondence between the radiation fields emanating from both sources can be achieved also in the case of different sizes of the sources; the control unit (13) then controls the drive device (11, 12) in such a manner that the shutters occupy a first position (h.sub.1) when limiting the radiation beam (101) from the first source (1) and a second position (h.sub.2) when limiting the radiation beam (200) from the second source (2), the first and the second position being such that the respective radiation fields of the first and the second source, as defined by the shutters, have equal size (H).
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: December 1, 1998
    Assignee: U.S. Philips Corporation
    Inventor: Heinz-Peter Kunert
  • Patent number: 5841834
    Abstract: A filter arrangement in a radiography apparatus in order to define the intensity of the radiation beam incident upon the object. To the movable filter part in front of the radiation source (2) there is coupled an electric circuit element, for example a potentiometer, from which the signal is applied further to a row (8) of light-emitting diodes in the vicinity of the object to be radiographed, for example the patient's head (7). When the filter is moved, the electric signal controls the light-emitting diodes so that the light-emitting diodes which become illuminated in the row will indicate the boundary of the filtered radiation beam at a given time.
    Type: Grant
    Filed: November 29, 1996
    Date of Patent: November 24, 1998
    Assignee: Orion-Yhtyma OY
    Inventor: Esa Pekka Suuronen
  • Patent number: 5835562
    Abstract: A medical radiological apparatus, such as an x-ray bone densitometry apparatus includes patient positioning aides for accurate patient placement and consistent positioning during a single scanning procedure, or during subsequent procedures. An optical crosshair device helps align the patient's spine along the Y-axis of the apparatus and the patient's hips along the X-axis of the apparatus, perpendicular to the spine. Spinal and forearm positioning aides help the patient maintain consistent, comfortable positions within scans. They also enable reproducibility of patient position in subsequent scans, so that scan results from one scan to another may be compared by a medical practitioner, with reasonable assurance that the respective scan results are not unduly compromised by inconsistent patient placement. The forearm positioning aide consistently places the forearm flat on the patient support table in a proper position parallel to the longitudinal table axis.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 10, 1998
    Assignee: Hologic, Inc.
    Inventors: Tracy L. Ramsdell, Tina LeFebvre
  • Patent number: 5807252
    Abstract: To improve the reliability of a process for determining the position of a body part in which bone screws are screwed into the bone of the body part in question, each bone screw is provided with a radiation emitter or radiation receiver. A number of fixed receivers or emitters are used as appropriate to receive radiation from the bone screw transmitters or direct radiation towards the bone screw receivers. The radiation direction and/or radiation propagation time and/or radiation field strength or frequency is used to determine the position of each radiation emitter or receiver. A system for determining position based on this procedure and bone screws which can be used therefor are also disclosed.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: September 15, 1998
    Assignee: Aesculap AG
    Inventors: Stefan Hassfeld, Joachim Muhling, Theodor Lutze, Joachim Schulz
  • Patent number: 5798822
    Abstract: A pair of reference plates is so arranged as to have a predetermined positional relationship on a carriage that integrally holds a mask and a photosensitive substrate such that the mask and the photosensitive substrate oppose each other on two sides of a projecting optical system. By periodically detecting the positional relationship between the reference plates in the optical axis direction, a variation with time occurring in the detection characteristics of position detecting devices is detected. Both stable image formation characteristics and a high throughput are realized by correcting a driving signal to be supplied to a driving device in accordance with the detected variation.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: August 25, 1998
    Assignee: Nikon Corporation
    Inventors: Seiji Miyazaki, Hiroshi Shirasu, Kazuaki Saiki, Tsuyoshi Narabe
  • Patent number: 5782842
    Abstract: A device for marking a planned guide path of a medical instrument such as a puncture needle is disclosed. The device incorporates two sources of electromagnetic radiation, such as lasers, which produce two light rays. The intersecting line of the light rays marks the guide path for the puncture needle. Deviations of the angle position of the puncture needle from the planned guide path are visible by examining the reflection of the light from the puncture needle. Different colors of light may be used with the light rays being formed in a fan-shape in a common plane. In this manner, the color of the reflected light on the surface of the puncture needle changes depending on whether the puncture needle is located at the intersection of the light rays.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: July 21, 1998
    Assignee: Daum GmbH
    Inventors: Wolfgang Kloess, Christian Frahm
  • Patent number: 5778043
    Abstract: For quality assurance of radiation beams from a radiation source used for therapy of a patient, a reference structure is attached to the patient on the radiation therapy machine in a known position relative to the patient and the radiation machine. Predicted projection contours of the radiation beams onto the reference structure are determined and described on the reference structure. Field lights in the radiation machine through the collimator aperture of the beams are cast upon the reference structure and the associated light contours of the beam apertures are compared to the described or predicted contours from treatment planning or from quality assurance set up. Several forms of such beam quality control system and methods accommodate the specific objectives. Computer-generated beams projection sheets are overlaid on the reference structure corresponding to predicted field light projections.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: July 7, 1998
    Inventor: Eric R. Cosman
  • Patent number: 5745545
    Abstract: A system and method for applying radiation therapy include utilizing a radiation applicator that is spaced apart from and mechanically independent of a radiation source. An array of targets is affixed to the radiation applicator and cameras image the targets to determine coordinates that are compared to desired target coordinates. If there is a correlation between actual target coordinates and desired coordinates, radiation source-to-applicator alignment is achieved. Consequently, the patient is properly positioned relative to a radiation beam, such as an electron beam. On the other hand, if the actual and desired coordinates are different, the relative position of the radiation source and the gantry is adjusted. Preferably, the adjustment is automated.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: April 28, 1998
    Assignee: Siemens Medical Systems, Inc.
    Inventor: John H. Hughes
  • Patent number: 5745548
    Abstract: The invention provides a system for and method of precalibrating the position of the focal spot of an X-ray tube before its installation in a CT scanner system so that the focal spot of the tube is properly aligned with the off-focal aperture, slice-defining aperture and detectors of the scanner system. The precalibration is performed using an interface registration support that receives the X-ray tube and supports the X-ray tube on a mount provided in either the precalibration system or the scanner system. The mount of the precalibration system duplicates the mount of the scanner system, so that desired position of the focal spot in the scanner system relative to the scanner system mount is duplicated in the precalibration system relative to the precalibration system mount.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: April 28, 1998
    Assignee: Analogic Corporation
    Inventors: John Dobbs, Ruvin Deych, David Banks
  • Patent number: 5708696
    Abstract: A device (10) for positioning the location of an emitted x-ray (1 2a) has an optical mirror (20) having at least two leg portions (31, 32) separated by stepped portion (30) formed therewith. Leg portions (31, 32) and stepped portion (30) have substantially uniform x-ray transmisivity. A light emitting assembly (21) for transmitting a locating beam of light (14) onto the stepped portion (30). The device also includes mounting means (13, 22) for mounting the optical mirror (20) proximate to the x-ray emitting device (11) and completely encompassing the emitted x-ray (12a). The locating beam of light (14) is caused to be directed toward the target (15) by the angle of the mirror (20).
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: January 13, 1998
    Assignee: Dentsply Research & Development Corp.
    Inventor: Arkady Kantor
  • Patent number: 5707360
    Abstract: The invention relates to a target apparatus for linearly inserting an instrument into a human body comprising a computer tomograph for determining the piercing spot and marking it, the improvement comprising: a slide which is adjustably guided above the gantry of the computer tomograph along a horizontal guide means, preferably along a transversal plane, which slide can be arrested in any position along the guide means, a laser device for producing a target mark in space, a supporting means for mounting the laser device to the slide for being pivoted about a horizontal axis such that the beam of the laser device is pivoted in a vertical plane and further comprising an angular scale attached to the slide for indicating the pivoting angle of the laser device.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: January 13, 1998
    Assignee: Lap GmbH Laser Applikationen
    Inventor: Armin Rockseisen
  • Patent number: 5690107
    Abstract: The invention related to positioning and marking a patient at a diagnostic apparatus, for example before and after a fluoroscopic examination in a computer tomograph comprising at least four line lasers being movably supported for travelling along a respective axis, two line lasers being arranged above a patient placed on a movable table projecting a sagittal line and a transverse line on the body of the patient and two further line lines arranges sidewards of the table each projecting a line along the body axis sidewards on the body, further comprising numerically controlled drive means for moving the line lasers to adjust the projected lines in a transverse direction and comprising a positioning control device, controlling the drive means and a manually operated input device for supplying the coordinates, the location and extension of the radiation zone as determined by the computer tomograph for being supplies to the control device, and projecting orthogonal coordinate axes on the patient for marking the p
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: November 25, 1997
    Assignee: Lap GmbH Laser Applikationen
    Inventor: Karsten Hofmann
  • Patent number: 5689545
    Abstract: A portable battery powered tool for aligning equipment in an X-ray room includes two spaced apart channel engaging connectors carried by a reference surface of the tool for engaging the usual recessed channels in the ceiling of the X-ray room, a laser carried by the tool for projecting a line in a projection plane parallel to the reference surface and an electronic sensor and indicator carried by the tool for indicating with an array of LEDs whether the projection plane deviates from level along each of two orthogonal axes. The tool also includes adjustment screws for finely adjusting the orientation of the reference surface relative to the ceiling. When mounted to the ceiling and leveled, the tool projects a line on a surface of the rail which projected line is used as a reference for leveling the rail. A stand is provided for the tool to establish a vertical projection plane so as to produce corresponding projected lines on the floor and ceiling.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: November 18, 1997
    Assignee: U.S. Philips Corporation
    Inventor: Edwin Hopkins
  • Patent number: 5684854
    Abstract: A method of establishing coincidence between a field size of a light field used in a setup mode of a radiation system and a field size of a radiation field used in an operation mode of the system includes providing automatic adjustment of field-defining structure to compensate for differences in optical properties of the light and the radiation. A light beam passing through the field-defining structure typically exhibits greater scattering than an X-ray beam passing through the structure. For each of a number of different settings of the field-defining structure, the difference between the field sizes of the light and the radiation are determined and recorded. Then, for a particular desired field size, the field-defining structure can be automatically adjusted to provide compensation.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: November 4, 1997
    Assignee: Siemens Medical System Inc
    Inventor: John H. Hughes
  • Patent number: 5675625
    Abstract: An apparatus for positioning and marking a patient at a diagnostic apparatus, for example prior and after transillumination in a computer tomograph, comprising a plurality of line lasers which project lines in planes perpendicular to each other for alignment with a patient body zone to be irradiated and for marking thereof, the improvement of which comprises a first line laser being fixed to a support member which is mounted so as to be rotatable about an axis adapted to be aligned substantially to a central axis of the diagnostic apparatus, e.g.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: October 7, 1997
    Assignee: Lap GmbH Laser Applikationen
    Inventor: Armin Rockseisen
  • Patent number: 5661775
    Abstract: An improved x-ray laser aiming system providing coaxial laser aiming in a configuration opposed to the x-ray emitter is disclosed. The present invention comprises two basic components: 1) a laser sight coupled to an x-ray emitter, and 2) a laser device assembly coupled to an x-ray collector. The laser sight provides a means for aligning the x-ray emitter with a laser beam during surgical or diagnostic procedures. The laser device assembly is removably coupled to the image intensifier or x-ray collector. The laser device assembly contains a point laser source and a fixed reflective surface or mirror for directing a laser beam coaxially with the center ray of the x-rays emitted by the x-ray emitter, but in the opposite direction. The laser source is, therefore, in a configuration opposed or opposite to the x-ray emitter.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: August 26, 1997
    Assignee: OEC, Inc.
    Inventors: Steven Lee Cramer, Li Yuan
  • Patent number: 5657368
    Abstract: An apparatus for positioning and marking a patient at a diagnostic apparatus, for example before and after being scanned in a computer tomograph, comprising at least four line lasers adapted to be displaced along an axis, two of said line lasers being arranged above the patient lying upon a displaceable bed so as to project a sagittal line and a transversal line onto the body of the patient and two of said line lasers being arranged laterally of the bed so as to project a line along the body axis laterally onto the body, numerically controlled drives for said line lasers for adjustment thereof transversely to the respective projected lines, position control means for said drives, and manually operable input means for said control means for entering coordinates related to the position and extent of an area to be irradiated and determined by the computer tomograph.
    Type: Grant
    Filed: June 8, 1995
    Date of Patent: August 12, 1997
    Assignee: Lap GmbH Laser Applikationen
    Inventor: Armin Rockseisen
  • Patent number: 5644616
    Abstract: Subsurface regions of an X-ray transparent but optically opaque object (60) are targeted along a visible line of sight (42) obtained by the use of two radiation sources (an X-ray (46) and light beam source, preferably a laser (6)). The central ray from the X-ray source and the light beam are aligned using a calibration fixture (15), one to the other and both with respect to structures (59) internal to the object being imaged to provide the visible line of sight. The system, method and apparatus may be used in surgical applications for selective illumination and sighting to reach specific subsurface members of a patients anatomy by guiding an incision.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: July 1, 1997
    Assignee: The Research Foundation of State University of New York
    Inventors: Michael K. Landi, Robert M. Lifeso
  • Patent number: 5606590
    Abstract: A surgical alignment system employs a laser beam generating device and a lens system to convert the beam into a plane of light which is aligned along a desired axis of the human body to provide proper alignment to the surgeon to enhance the accuracy of orthopedic surgery such as total knee, hip or back surgery. The laser beam generating device is mounted on a bracket which is fixed to a cassette holder positioned beneath the patient and having a chamber designed to removably receive an x-ray film cassette. The cassette holder is made of a material which is transparent to x-rays. Straps incorporated into the cassette holder are designed to fix the patient to the cassette holder during surgery. The cassette holder includes a radio-opaque indicator with the bracket holding the laser beam generating device having a second radio-opaque indicator so that when an x-ray is taken of the patient affixed to the inventive device, compensation for parallax may be carried out.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: February 25, 1997
    Inventors: Thomas D. Petersen, Richard J. Harp
  • Patent number: 5600698
    Abstract: An exposure apparatus for transferring a pattern of a mask onto a substrate, includes a regulating an member for regulating exposure beam from a light source, and an alignment optical system for projecting an alignment beam to an alignment mark of the mask, to perform alignment between the mask and the substrate. The regulating member is arranged to pass the alignment light therethrough. The distance E from the regulating member to the mask satisfies the relationE.gtoreq.(f+m)/2(tan.theta.+tan.gamma.,)where, as viewed from a direction of formation of an edge of the regulating member, .theta. is the angle defined between an optical axis of the alignment beam and an optical axis of the exposure beam, f is the beam width of a portion of the alignment beam passing through the regulating member, .gamma. is the maximum of a divergence angle, in an exposure region, of the exposure beam, and m is the width of the alignment mark.
    Type: Grant
    Filed: April 4, 1995
    Date of Patent: February 4, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Terashima, Takeshi Miyachi
  • Patent number: 5598454
    Abstract: An x-ray diagnostics installation includes a device for positioning a radiation emitter such that the reference ray of an emitted ray beam always and automatically intersects a reference axis that is stationary with reference to said device at an acute angle .alpha. when the radiation emitter is coupled to the device. X-ray exposures for tomosynthesis can thus be produced in a simple way.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: January 28, 1997
    Assignee: Siemens Aktiengesellschaft
    Inventors: Manfred Franetzki, Werner Guenther, Josef Ploetz
  • Patent number: 5598269
    Abstract: A portable laser guided alignment apparatus includes a laser line beam source and a laser fan beam source, with the line beam being in the same plane as the fan beam. The apparatus further includes mechanisms for adjusting the angle of the fan beam relative to a vertical reference plane and for adjusting the angle of the line beam within the plane of the fan beam. Additionally, measurement devices are included to measure the angle of the fan beam relative to the vertical reference plane, and to measure the angle of the line beam relative to a vertical reference line within the fan beam plane. The apparatus provides precise alignment for biopsy tools and other instruments used in standard biopsies, discolysis, stereotaxis, and other medical procedures wherein highly accurate positioning and insertion of instruments into a patient are required.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: January 28, 1997
    Assignee: Children's Hospital Medical Center
    Inventors: Yuli Kitaevich, Neil D. Johnson, Michael T. Miller, Alan Brown
  • Patent number: 5577095
    Abstract: An examination apparatus is equipped with a medical examination unit for performing medical examination of an examination body, and a medical examination area display means for indicating, with light, a medical examination area on the examination body placed in the medical examination unit.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: November 19, 1996
    Assignee: Sony Corporation
    Inventor: Shigeo Kobayashi
  • Patent number: 5572568
    Abstract: The present invention provides a radiation diagnosis apparatus which comprises a radiation generating apparatus for emitting radiation to a subject placed on a bed, an image pickup apparatus arranged so as to face the radiation generating apparatus for picking up the radiation passed through the subject as radiation image, a first light projecting device for irradiating first light along a central axis of irradiation visual field of the radiation, and a second light projecting device for irradiating second light intersected with the first light irradiated by the first light projecting means along the central axis, whereby the center of the irradiation visual field can be indicated.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 5, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Shingo Kanemitsu
  • Patent number: 5563924
    Abstract: An x-ray apparatus is provided which allows the diaphragm aperture and the diaphragm position to be precisely identified in a simple manner. For this purpose, a radiation imaging system is provided which produces an image of the aperture of the primary diaphragm on a radiation-electrical transducer, the radiation-electrical transducer on which the aperture is imaged being separate from the radiation detector on which the complete diagnostics image is produced. The radiation-electrical transducer is followed by evaluation electronics for forming electrical signals corresponding to the diaphragm aperture size and position.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: October 8, 1996
    Assignee: Siemens Aktiengesellschaft
    Inventor: Helmut Winkelmann
  • Patent number: 5553112
    Abstract: An apparatus and method for aligning a radiosurgery/stereotactic radiotherapy system. The system includes a linear accelerator, including a gantry and a collimator, a couch, and a stereotactic reference system mounted on the couch. The apparatus includes a laser measuring device mounted on the gantry, the laser measuring device having a laser generator element for generating a laser light beam and a laser displacement sensor. The apparatus also includes a reference fixture, attached to the stereotactic reference system, having at least one reflective surface for reflecting the laser light beam to the laser displacement sensor, upon which the laser displacement sensor measures the distance between the reflective surface and the laser measuring device.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 3, 1996
    Assignee: Medical Instrumentation and Diagnostics Corp.
    Inventors: Tyrone L. Hardy, Laura R. D. Brynildson
  • Patent number: 5553115
    Abstract: A medical X-ray apparatus capable of indicating the center of radiation cone of X-ray, regardless of the positioning distance or angle, always with high visibility on the irradiation surface of the patient,in which a plurality of visible optical means are provided outside the radiation cone of X-ray at intervals in the peripheral direction of an irradiation tube, and the visible optical means generates a visible light on a plane including the axis of X-ray, and thereby emitting a cross optical pattern on the irradiation surface of the patient, and the center of X-ray irradiation can be indicated on the irradiation surface as the intersecting position of the linear optical images. An X-ray irradiation tube which can be incorporated in the X-ray apparatus, and which is excellent in controllability, small in power consumption, capable of obtaining a stable quantity of light, and light in weight and small in size is also provided.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: September 3, 1996
    Assignee: J. Morita Manufacturing Corporation
    Inventors: Masaki Odaka, Eiichi Arai, Yoshihide Okagami, Akira Yuba
  • Patent number: 5537453
    Abstract: A coaxial laser targeting device is provided for use with x-ray equipment. The device includes an x-ray transparent housing, which encloses a gimbal platform that may be adjustably inclined in any direction. A laser source supplies light through an optical fiber to a lens assembly in the center of the gimbal platform and directs light through a laser emitting aperture in the housing. Three adjustment members arranged in a triangular configuration are used to incline the gimbal platform in any direction relative to the housing to angularly align the laser beam with an x-ray beam emitted by the x-ray equipment so that the beams are coaxial. A visible target created by the laser beam on a patient allows surgeons and the like to accurately perform medical operations without the need to continually operate an x-ray machine.
    Type: Grant
    Filed: November 23, 1994
    Date of Patent: July 16, 1996
    Inventors: Terry N. Williams, Randal R. Trecha
  • Patent number: 5533082
    Abstract: A computer Tomograph having a housing with an aperture (2) for the patient in which computer-controlled scanning devices are arranged to generate computer tomograms, and into which a motor-driven, and also computer-controlled, patient's couch can be inserted from the front of the housing (1). The patient's couch also acts as an operating table, such that as little information as possible is lost in the treatment of the patient between diagnosis and the action on, or treatment of, the patient. The action or treatment can thereby be as close as possible to the diagnosis both in time and place. At the front of the housing (1), there is a plurality of information displays connected to the computer, especially in the form of display screens. In front of the housing (1) there is an operation and treatment area for the patient, to which further diagnostic and/or operative and/or therapeutic auxiliaries are allocated.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: July 2, 1996
    Inventors: Dietrich H. W. Gronemeyer, Rainer M. M. Seibel
  • Patent number: 5517546
    Abstract: A method of, and a device for positioning an X-ray cassette (5 or 10) in relation to a source (1) of X-rays that emits radiation in a specific preferred direction (A). Another beam of radiation is emitted parallel to that direction at a specific distance (d) therefrom. The other beam is intercepted by a positioning device (20) secured to the cassette. The device produces a signal as long as the angle of incidence of the other beam does not exceed a specific threshold angle (.theta.) with respect to the normal to the cassette.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: May 14, 1996
    Assignee: Agfa-Gevaert Aktiengesellschaft, AG
    Inventor: Manfred Schmidt
  • Patent number: 5450467
    Abstract: A laser target selector incorporating a flexible tension coil spring removeably mountable on an X-ray tube's projection portal for illuminating a target spot to allow adjusted aiming of the X-ray beam.
    Type: Grant
    Filed: April 13, 1994
    Date of Patent: September 12, 1995
    Assignee: Lorad Corporation
    Inventors: Anthony J. Pellegrino, Earl C. Mayes, Donald E. Sharpe, George H. Bantz
  • Patent number: 5434901
    Abstract: In a soft X-ray microscope including a soft X-ray source for emitting soft X-rays, a condenser lens for focusing the soft X-rays onto a specimen under inspection, an objective lens for focusing soft X-rays emanating from the specimen, a soft X-ray detector for receiving the soft X-rays focused by the objective lens, and a visually observing optical system for forming a visible image of the specimen by converting an optical property of the specimen other than contrast and color into a contrast in brightness or color. The visually observing optical system may be formed as phase contrast microscope, dark field microscope, polarizing microscope, differential interference microscope, or fluorescent microscope. Then, alignment and focus adjustment can be performed by observing the visible image of the specimen without irradiating the specimen with the soft X-rays even if the specimen has substantially no contrast and color.
    Type: Grant
    Filed: December 7, 1993
    Date of Patent: July 18, 1995
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Komei Nagai, Yoshiaki Horikawa, Yoshinori Iketaki, Shoichiro Mochimaru
  • Patent number: 5431162
    Abstract: A method and apparatus accurately positions a selected cranial implant site for x-ray tomography. The method and apparatus comprise making a stent of the mandible and maxilla of a patient and making a mark on the stent at a position which corresponds to the selected cranial implant site. The stent is then positioned with regard to a tomographic x-ray imaging apparatus so that, (a) the mark on the stent is aligned with a light beam, preferably generated by a laser source, projected downwardly to intersect the central axis of the tomographic apparatus and, (b) the selected plane through the mark is perpendicular to the x-ray beam of the tomographic apparatus.
    Type: Grant
    Filed: January 11, 1994
    Date of Patent: July 11, 1995
    Assignee: Axialtome Australia Pty. Ltd.
    Inventor: Phillip C. McArdle
  • Patent number: 5426687
    Abstract: A laser targeting device for use during surgical procedures provides means for the precise co-axial alignment of a narrow laser beam with an x-ray beam. The device has a case which contains a reflecting mirror mounted at 45.degree. on a low mass assembly. The mirror lies directly in front of a radio-opaque cruciform target. The case is adjustably mounted so that the image of the crosshair target may be accurately centered on the target head. A calibration aid is used to pinpoint the emanation point of the x-ray beam from the source cone of the image intensifier. The angle at which the laser beam strikes the mirror may be varied in two planes. When the crosshair image is centered and the laser beam is directed onto the emanation point the two beams are rendered precisely co-axial. Accurate drilling along the laser beam path without further recourse to x-ray screening is more accurate and eliminates direct exposure of the surgeon to irradiation during orthopedic procedures.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: June 20, 1995
    Assignee: Innovative Care Ltd.
    Inventors: John D. Goodall, David E. Young
  • Patent number: 5390227
    Abstract: An exposure apparatus for exposing a semiconductor wafer to a semiconductor device pattern formed in a mask. The exposure energy is, for example, X-rays contains in synchrotron orbit radiation. A blade for limiting the area irradiated with the exposure energy on a mask or wafer is integrally movable in an alignment detecting unit for detecting the alignment mark. Four of such blades are provided to provide a square exposure area. The blades are movable independently by the associated alignment detecting units. Each of the blades is finely movable relative to the associated alignment detecting unit. The shape or size or the like of the blade is determined in consideration of the position of the blade in the direction of the exposure energy irradiation, and the maximum and minimum exposure view angle. The blade is cooled. The exposure area can be changed highly accurately and efficiently with a simple structure.
    Type: Grant
    Filed: May 17, 1993
    Date of Patent: February 14, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Mizusawa, Ryuichi Ebinuma, Takao Kariya, Isamu Shimoda, Shunichi Uzawa
  • Patent number: 5388143
    Abstract: An alignment method and system for aligning an anti-scatter grid with an x-ray source of a radiographic apparatus, to facilitate accurate alignment of the central x-ray beam of the x-ray source of the radiographic apparatus with a focused grid. The present invention uses a first light projector that is substantially fixed relative to the x-ray source, which produces a first alignment image that is substantially fixed relative to the grid. Also included is a second light projector that is substantially fixed relative to the grid, and that produces a second alignment image that is substantially fixed relative to the x-ray source. The first light projector is preferably the collimator light included within the collimator housing of the x-ray apparatus, and the second light projector is preferably a laser light source, that is attachable to a grid cassette holding the grid.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: February 7, 1995
    Assignee: Arch Development Corporation
    Inventor: Heber MacMahon
  • Patent number: 5359640
    Abstract: An X-ray diffractometer having a simple yet accurate means for locating the surface of the sample to be examined with respect to the zero point of the X-ray (RS) is disclosed. Briefly stated, a laser (LA) and camera (KA) are positioned at preferably 90.degree. with respect to each other such that the intersection of the optical axis of the camera and the laser passes through the zero point of the diffractometer. In this fashion, the camera will see at its center, the zero point of the X-ray despite the fact that the X-ray is of course invisible to the naked eye. Accordingly, by movement of the sample (P) with respect to this camera image, the true and correct zero point of the X-ray with respect to the surface of the sample to be examined may be determined without the need for experimental and unnecessary X-ray or examination runs being taken.
    Type: Grant
    Filed: August 10, 1993
    Date of Patent: October 25, 1994
    Assignee: Siemens Industrial Automation, Inc.
    Inventors: Juergen Fink, Rolf Schipper, Kingsley Smith, Richard Ortega
  • Patent number: 5354314
    Abstract: A method and apparatus for determining, in three dimensions, the location, size, depth and width of tumors, lesions, abnormalities, structures, and the like, particularly useful for stereotactic surgery. The invention utilizes several energy beams which, when they intersect, allow for such measurements and calculations. In one embodiment, the energy sources attach to a stereotactic frame. In an alternative embodiment, the energy sources are incorporated within a stereotactic microscope. Either embodiment may be mounted on an articulated robotic type arm.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: October 11, 1994
    Assignee: Medical Instrumentation and Diagnostics Corporation
    Inventors: Tyrone L. Hardy, Laura D. Brynildson
  • Patent number: 5351279
    Abstract: A direct conversion X-ray photo-electron cathode has specially designed secondary electron emission layers which provides high efficiency, low noise, high speed and broad band X-ray photon detection. The X-ray photocathode is integrated with a micro channel plate and an output phosphor display screen to form a panel type X-ray intensifier. The X-ray intensifier is combined with a micro-focus X-ray source to provide projection type X-ray microscope for use in X-ray microscopic diagnostic applications.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: September 27, 1994
    Assignee: CSL Opto-Electronics Corporation
    Inventors: Yongzheng She, Shizheng Chen, Weilou Cao, Yanhua Shih
  • Patent number: 5325414
    Abstract: X-ray alignment method and apparatus therefor characterized by separately irradiating alignment light to alignment patterns of an X-ray mask and detecting reflected light therefrom, and directly irradiating alignment light to alignment patterns of a wafer and detecting the reflected light therefrom, and aligning the X-ray mask and the wafer in accordance with the detecting data of the reflected light. The apparatus includes a position alignment mechanism for the mask stage and the wafer stage, which moves the X-ray mask and/or the wafer and provides the alignment therebetween. The apparatus includes independent light sources for irradiating the alignment patterns of the X-ray mask side and the wafer side, independent detectors for detecting the reflected light of the alignment patterns of the X-ray mask and the wafer, and a controller for analyzing the respective positions of the X-ray mask and the wafer in accordance with the detection data and issuing control signals to the position alignment mechanism.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: June 28, 1994
    Assignee: Sortec Corporation
    Inventors: Toshihiko Tanaka, Koichi Okada
  • Patent number: 5320111
    Abstract: Method and apparatus for locating and guiding a biopsy needle with respect to an X-rayed specimen having a tumor to be engaged by the needle. Intersecting laser beams are utilized to mark the location of the tumor and to guide the biopsy needle in a vertical path. The laser beam source is movable in orthogonal paths while compensating means redirect the beams to maintain them within a target area or eliminate any parallax. That is, the angular position of the laser light beam is adjusted to different angles at different coordinate positions to have the needle follow along a portion of a straight line path from the X-ray point source through the lesion and to the X-ray film. Thus, the needle tip should not be displaced to one side of a small lesion.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: June 14, 1994
    Assignee: Livingston Products, Inc.
    Inventor: Troy W. Livingston
  • Patent number: 5311568
    Abstract: An imaging system comprised of a source of penetrative radiation 14, an image intensifier tube 18 and a video camera 38 is provided. The intensifier tube is comprised of a input screen 22 and an output screen 24. The intensifier tube converts radiation 20 impinging on the input screen into a visible light image 36 on the output screen 24. The video camera is operatively positioned to view the output screen of the intensifier. A light sampler 50 is operatively disposed in the visible light path between the image intensifier output screen 24 and the video camera input 38. The light sampler is comprised of a mirror 52, a focusing lens 54, a beam splitter 56, an aperture 58, a light source 78, a photo receptor 60 and an optical aligner 64.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: May 10, 1994
    Assignee: Picker International, Inc.
    Inventors: William J. McKee, Jr., John R. Haire
  • Patent number: 5309495
    Abstract: In x-ray fluorescence systems, the screening prevents the bringing of the measurement spot into the correct position in relation to the x-ray beam using the naked eye. The use of a television camera with a screen as well as illuminating devices makes the measuring system expensive and complicates the use of the system. According to the invention, this is avoided in that use is made of an illuminated device, which operates using an optical system and which reproduces, by convergent light beams at their intersection, the correct height position, lateral position and forward/rearward position of the measurement object when the tray carrying the measurement object has been moved to a forward position away from the x-ray beam.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: May 3, 1994
    Inventor: Helmut Fischer
  • Patent number: 5299251
    Abstract: An exposure apparatus for a semiconductor wafer, a liquid crystal display panel and so on. The exposure apparatus comprises a light source, a holding means for a mask and a target, a moving means for moving the holding means and optical alignment systems. The optical alignment system has a moving base on which a detecting means is installed. The moving bases are arranged in the same plane and have narrow portions in their front.
    Type: Grant
    Filed: April 13, 1993
    Date of Patent: March 29, 1994
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nobutaka Kikuiri, Yoriyuki Ishibashi, Takahiro Murata
  • Patent number: 5283808
    Abstract: An improved x-ray laser aiming system providing coaxial laser aiming in a configuration opposed to the x-ray emitter is disclosed. The present invention comprises two basic components: 1) a laser sight coupled to an x-ray emitter, and 2) a laser housing coupled to an x-ray collector. The laser sight provides a means for aligning the x-ray emitter with a laser beam during surgical or diagnostic procedures. The laser housing is removably coupled to the image intensifier or x-ray collector. The laser housing contains a point laser source and a fixed reflective surface or mirror for directing a laser beam coaxially with the center ray of the x-rays emitted by the x-ray emitter, but in the opposite direction. The laser source is, therefore, in a configuration opposed or opposite to the x-ray emitter.
    Type: Grant
    Filed: July 1, 1992
    Date of Patent: February 1, 1994
    Assignee: Diasonics, Inc.
    Inventors: Steven L. Cramer, Li Yuan
  • Patent number: 5276726
    Abstract: The invention set forth methods and apparatus for correcting the effect on image quality of a film processor having the steps of shielding a first portion along one edge of a film from x-ray energy and impressing, on the first portion, a first calibrated test pattern having a first calibrated graded stepwise density pattern made from visible light. A first plurality of symbols located adjacent the first pattern to indicate the magnitude of one of the density positions. Impressed along one edge of a control film, a second calibrated test pattern, which includes a second calibrated graded stepwise density pattern made from visible light. A second plurality of symbols are provided adjacent the second pattern to indicate the magnitude of one of the density positions. The performance of the film processor used to develop both films is measured and affected by comparing and noting the symbols associated with those density positions between the first and second test patterns.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: January 4, 1994
    Assignee: Thomas Jefferson University
    Inventor: Benjamin M. Galkin
  • Patent number: 5241578
    Abstract: An optical alignment system for aligning a film cassette carrying grid cassette with an x-ray source of a portable x-ray apparatus. To facilitate accurate alignment of the central x-ray beam of the x-ray source of a portable x-ray apparatus with a focused grid in a clinical setting, the present invention uses a light projector and a reflector device. The light projector is substantially fixed relative to the x-ray source and projects a spot or line of light on the surface of the grid cassette. The reflector device, which can be temporarily or permanently fixed to the grid cassette, includes a reflector surface and an image surface. Images of the incident light spot or line and of the reflected light spot or line are formed on the image surface, and the distance between the images indicates the magnitude of angulation alignment error between the grid cassette and the x-ray source.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: August 31, 1993
    Assignee: ARCH Development Corporation
    Inventor: Heber MacMahon
  • Patent number: 5220169
    Abstract: A first beam of light having a wavelength ranging from a soft X-ray to a vacuum ultraviolet region is focused into a thin beam of light and irradiated upon a surface of a specimen, and physical information obtained as a result of such irradiation is detected to obtain information of the surface of the specimen. A second beam of light is focused into a thin beam of light and irradiated at the irradiation spot of the first beam of light upon the surface of the specimen, and the position of the irradiation spot of the second beam of light on the surface of the specimen is visually observed to located the position of the irradiation point of the first beam of light on the surface of the specimen.
    Type: Grant
    Filed: May 2, 1990
    Date of Patent: June 15, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Ken Ninomiya, Keizo Suzuki, Shigeru Nishimatsu