Abstract: A system and method are disclosed for computing a radiation dose delivered to a patient during a computed tomography (CT) scan of the patient. The CT image dataset generated during the scan of the patient, and one or more parameters relating to a x-ray source are used to calculate the radiation dose delivered to the patient as a function of the CT image data set and the one or more parameters of the x-ray source. The radiation dose is generally found by calculating a primary x-ray dose distribution and scattered x-ray dose distribution from the CT image dataset and taking the sum of the primary x-ray dose distribution and scattered x-ray dose distribution.

Abstract: A radiation imaging apparatus is capable of taking a moving picture by acquisition by a reading circuit of a plurality of radiation image signals on the basis of a plurality of successive times of irradiation of a radiation detector with radiation rays. The radiation detector has a two-dimensional array of pixels. In a period between a start of an n-th time of irradiation with radiation rays and a start of an (n+1)-th time of irradiation with radiation rays, where n is a natural number, a controller switches an operation status of an analog-to-digital converter that converts electric signals read by the reading circuit into digital signals so that power consumption of the analog-to-digital converter is reduced.

Abstract: An imaging system that includes a radiation source. An image receptor is located to receive radiation emitted by the radiation source. The imaging system further has a servo system that includes a computer operationally coupled to a motor-load element. The servo system is configured to position the radiation source, the image receptor and the object to be scanned. The servo system is configured to measure at set time intervals in real-time a position of the radiation source, the image receptor, and the object. The measured position is used to predict a native hardware motion parameter value for the servo system.

Abstract: The invention relates to an user interface comprising: a read only memory for an operating parameter of an X-ray system with each one section for contrast medium injection, for data acquisition, for reconstruction of data, for image storage and for displaying of an image; a write-read-memory for the operating parameter which has to be transferred to the corresponding section of the X-ray system; and a control unit for copying the operating parameter from the read only memory into the write-read-memory. The copied operating parameter is graphically supported within the write-read-memory alterable.

Abstract: Several methods and a system of noise limitation of a signal dependent multibit digital to analog signal conversion are disclosed. An exemplary embodiment provides a method that includes receiving an output of a multibit analog to digital circuit of a continuous time sigma delta converter. The method further includes limiting a noise generation by adaptively selecting a digital to analog converter element out of a plurality of digital to analog converter elements in accordance with an input signal magnitude. In addition, the method includes implementing a selected digital to analog converter element to generate an analog signal.

Abstract: A radiographic method and apparatus determine the presence/absence of an afterimage and notify a user to erase the afterimage only when it is necessary instead of erasing the afterimage every time radiography is executed. An FPN image is obtained before radiography and uniformity of the values of pixels contained in the FPN image is determined by using the values of the pixels contained in the FPN image.

Abstract: When a cassette transceiver starts to transmit radiation image information to a console transceiver, the cassette transceiver transmits a test radio wave, and the console transceiver calculates a minimum transmission radio-field intensity of said cassette transceiver which is required to receive the radiation image information from a received intensity of said test radio wave, and transmits a command radio wave representing the calculated minimum transmission radio-field intensity as a command to said cassette transceiver. The cassette transceiver is thus capable of transmitting the radiation image information at the commanded minimum transmission radio-field intensity. The consumption of electric power for transmitting the radiation image information from the cassette transceiver to the console transceiver is thus minimized.

Abstract: A technique is provided for extracting one or more features of interest from one or more projection images. The technique includes accessing projection images comprising at least one feature of interest enhanced by a contrast agent, generating a contrast agent null image based on the projection images, generating a bone mask based on the contrast agent null image, and generating a bone extracted image based on the bone mask.

Abstract: An x-ray system comprises an x-ray tube, covered by a housing, which emits x-rays therefrom, and a receiver mounted within the x-ray tube housing. An electronic sensor receives the emitted x-rays, converts the received x-rays into electrical image data signals, and transmits the electrical image data signals to the receiver. An image processing unit processes the electrical image data signals received from the receiver.

Abstract: A radiation image capturing system detects the position of a radiation detecting cassette disposed below a patient and the position of a radiation source for emitting a radiation, based on the differences between the propagation times of radio waves emitted from an antenna device to an image capturing apparatus and the radiation detecting cassette. Based on the detected positions, the relative positions of the image capturing apparatus and the radiation detecting cassette are calculated, and then compared with each other by a position determining unit to judge how the image capturing apparatus is positioned with respect to the radiation detecting cassette. If the image capturing apparatus is not positioned in head-on facing relation to the radiation detecting cassette, then a warning is issued, and an actuating mechanism moves the image capturing apparatus to an appropriate position.

Abstract: A digital radiography detector includes a housing and a radiographic image detector assembly. The housing has a first and second spaced planar members and four side walls defining a cavity. The radiographic image detector assembly is mounted within the cavity for converting a radiographic image to an electronic radiographic image. The detector assembly includes a scintillator screen and a detector array, and the detector assembly is bonded to the first planar member of the housing.

Abstract: The present invention refers to a radiation system (1) comprising an excentric gantry (100) arranged in connection with multiple treatment rooms (61-68) separated by radiation-shielding separating members (71-78). A movable rotation head (120) is connected to the gantry (100) and is able to move between, and direct a radiation beam (110) into, the treatment rooms (61-68). A simulator head (200-1 to 200-8) is preferably arranged together with the radiation system so it can be used in each respective treatment room (61-68). In such a case, while a first subject (40-1) is being irradiated in a first room (61), a treatment set-up procedure, including correct positioning of subjects (40-2 to 40-8) and irradiation simulation, can simultaneously take place for the other subjects (40-2 to 40-8) in the other treatment rooms (62 to 68).

Abstract: Processing circuitry is provided for a high voltage operated radiation detector. An event detector utilizes a comparator configured to produce an event signal based on a leading edge threshold value. A preferred event detector does not produce another event signal until a trailing edge threshold value is satisfied. The event signal can be utilized for counting the number of particle hits and also for controlling data collection operation for a peak detect circuit and timer. The leading edge threshold value is programmable such that it can be reprogrammed by a remote computer. A digital high voltage control is preferably operable to monitor and adjust high voltage for the detector.

Abstract: A hazardous materials sensing robot includes a robot platform and a universal mounting tray on the robot platform for removably mounting thereon a plurality of sensors each having an output. An electronic interface unit is configured to receive the outputs of the sensors. An operator control unit remotely operates the robot platform. There is a communication link between the robot platform and the operator control unit for transmitting the sensor outputs to the operator control unit.

Abstract: A system is provided for radiographic inspection of an object comprising multiple having different material properties. The system comprises a radiation source configured to generate radiation, a display unit for generating a graphical user interface (GUI) including multiple fields. A user enters input data via the fields in the GUI. The input data relates to one or more material properties for each of the regions. A processor is configured to compute a plurality of exposure parameters based on the input data.

Abstract: A receiving medium comprising N components is assigned to a channel comprising N components respectively and provided along the circumference around which a rotating frame rotates. At a position facing the receiving medium corresponding to the rotation, the transmission medium of M components (M?2N, N represents an integer more than 2) are arranged separately in a line along the circumference of the rotating frame. A signal generation device produces the signal containing data relating to an object obtained by detection of the X-ray detector device. When the transmission medium is rotated according to the carrier signal to face any of the receiving medium, a switching device transmits the signal from the channel to one of the corresponding receiving medium. When the interval between the two adjacent transmission medium passes through the receiving medium, the signal from the same channel may be transmitted to the two adjacent transmission medium.

Abstract: A radiographic imaging system including: a cassette including radiographic image obtaining means for obtaining radiographic image data by radiographing, a memory for storing the radiographic image data obtained by the radiographic image obtaining means, and cassette communication means for communicating the radiographic image data stored in the memory with the console; and the console comprising console communication means for communicating with the cassette, and console power supply means for supplying power to the console communication means, wherein when the radiographic image data which is not transmitted to the console does not exist in the memory, the console power supply means stops supplying of power.

Abstract: The present invention relates to a collision detecting device for a radiation treatment apparatus, comprising a radiation unit having an internal space, for directing radiation beams towards a radiological focus in the internal space for treatment of a target in a patient's body therein. The collision detecting device comprises a collision detecting unit being electrically conductive at least on its outer surface and having a size slightly smaller than the internal space of the radiation unit, so as to be insertable into the internal space and held in an electrically insulating manner in respect of the radiation unit by spacer elements. The outer electrically conductive surface is connectible to an electrical voltage supply in order to detect if the outer surface of the collision detecting unit abuts against the inside surface of the radiation unit. The invention also relates to a method for performing such collision detection.

Abstract: A method of utilizing the output of a first pulse processor, such as processor designed for use with an SDD, to generate the input signal expected by the second pulse processor, such as an existing processor not designed for use with an SDD. In one embodiment, piled-up pulses which would not be detected as such by the second pulse processor are omitted from the generated input signal. The method generates an output (which then serves as the input signal for the second pulse processor) of the same general form as the ramp signal from a detector with a pulsed-reset preamplifier, but which does not have the same noise characteristics. In addition, the method may alter the timing between the reconstructed steps in the ramp to increase the maximum throughput of the second pulse processor beyond what is normally possible with a direct connection to the associated detector.

Abstract: Disclosed a radiation image apparatus including: a radiation image acquiring unit to acquire radiation image data by radiation radiography; a first communication unit to transmit the radiation image data acquired by the radiation image acquiring unit from a first antenna by an electric wave having a frequency exceeding 1 GHz; and a second communication unit to transmit the radiation image data acquired by the radiation image acquiring unit from a second antenna located at a position different from that of the first antenna by an electric wave.

Abstract: This system for dental X-ray image acquisition comprises an X-ray generator and a control module for controlling an intra-oral sensor. The module includes means for sending a command to the generator in application of at least one predetermined criterion for preventing, stopping, or modifying the power of X-ray emission. The use of this system for optimizing the quantity of X-rays received by a patient.

Abstract: A detector apparatus is disclosed that includes a housing and a multilayer disposed within the housing. The multilayer defining a leading edge and a trailing edge and is adapted to interact with a plurality of high-energy photons, impingent from the leading edge, to permit passage of photons of at least one selected energy. The multilayer is secured to a first securement adjacent to the leading edge. The multilayer is secured to a second securement bracket adjacent to the trailing edge. At least one detector is disposed adjacent to the trailing edge of the multilayer to detect the impingent high-energy photons. An adjustment mechanism operatively connects to the second securement bracket to adjust the position of the second securement bracket, thereby altering an angular position of the multilayer.

Abstract: A radiation imaging apparatus is capable of taking a moving picture by acquisition by a reading circuit of a plurality of radiation image signals on the basis of a plurality of successive times of irradiation of a radiation detector with radiation rays. The radiation detector has a two-dimensional array of pixels. In a period between a start of an n-th time of irradiation with radiation rays and a start of an (n+1)-th time of irradiation with radiation rays, where n is a natural number, a controller switches an operation status of an analog-to-digital converter that converts electric signals read by the reading circuit into digital signals so that power consumption of the analog-to-digital converter is reduced.

Abstract: It is proposed according to the invention to record, in an image recording device for recording X-ray images, offset frames for different operating modes of said device according to a current sequence, wherein said current sequence can, by taking into account a new sequence in a comparison procedure, be changed into an updated sequence. The new sequence is based on the frequency with which the individual operating modes are used.

Abstract: A system for reducing movement of an object is described. The system includes a first detector configured to detect a first beam and a second detector configured to detect a second beam The first and second detectors are located within a radiography room.

Abstract: A device for locally resolved control of a radiation dose (?(?,e+)({right arrow over (r)})) applied with a pulsed particle beam (6) in particle beam therapy, with a processing unit (24), which is set up to detect continuously a count rate of x-ray quanta (14) measured with a positron emission tomograph (2) and to determine the applied radiation dose (??(?,e+)({right arrow over (r)})) from the pattern of the measured count rate, by determining by computation from the measured pattern of the count rate the time intervals (In), in which an interaction of the particle beam (6) takes place at the application site and by rejecting these time intervals (In) for the determination of the applied radiation dose (?(?,e+)({right arrow over (r)})).

Abstract: Since a notification unit (130) notifies a radiographer of the driving state of an X-ray detector (110), he/she can identify that the X-ray detector (110) is set in a detection signal accumulation state. When the irradiation button of an X-ray generation apparatus is then pressed, a subject can be irradiated with X-rays.

Abstract: A method includes automatically determining at least one gating signal based on a physiological signal from a subject being imaged by an imaging system, automatically determining, based upon prior analysis and knowledge of the imaging system's capabilities, a timing of each of a plurality of exposures within a single or multiple cycles of the physiologic signal, and performing the multiple acquisitions.

Abstract: An imaging system that includes a radiation source. An image receptor is located to receive radiation emitted by the radiation source. The imaging system further has a servo system that includes a computer operationally coupled to a motor-load element. The servo system is configured to position the radiation source, the image receptor and the object to be scanned. The servo system is configured to measure at set time intervals in real-time a position of the radiation source, the image receptor, and the object. The measured position is used to predict a native hardware motion parameter value for the servo system.

Abstract: An image processing apparatus includes a storage unit which stores the data of a plurality of images in an angiography sequence, and a computation unit which generates a reference time density curve concerning a reference region set in a blood supply region to a blood supplied region and a plurality of time density curves concerning a plurality of local regions set in the blood supplied region on the basis of the data of a plurality of images, and computes a plurality of indexes respectively representing the correlations of the plurality of time density curves with respect to the reference time density curve.

Abstract: An x-ray system quick-connect connection is disclosed to allow an end-user to de-couple a portable x-ray detector from an x-ray scanner/host. The quick-connect connection is accessible by the end-user without removal of a service panel that exposes an interior service portion of the x-ray scanner or x-ray detector. The de-coupled x-ray detector may be stored independently from the x-ray scanner/host and may be shared among multiple x-ray scanner/host systems, when properly calibrated. De-coupling a single quick-connect connection de-couples all power and communication lines between the x-ray scanner/host and the x-ray detector.

Abstract: X-ray apparatus has a radiation source operated by a voltage generator, a digital solid-state radiation detector and a control device controlling the operation of the apparatus. The control device determines a waiting time between two successive image acquisitions, dependent on at least one operating parameter for the radiation source set by the control device or by the voltage generator.

Abstract: Method of positioning a mobile X-ray detector unit of an X-ray system, X-ray system and mobile X-ray detector unit. method is described for positioning a mobile X-ray detector unit (25, 26) of an X-ray system (1). The X-ray system (1) deployed has X-ray radiation units (5, 6, 7) and at least one mobile X-ray detector unit (25, 26). The X-ray radiation units (5, 6, 7) thereby each have an active and a passive operating status. The X-ray radiation units (5, 6, 7) are each assigned a detector holder (8, 9, 10, 11, 12) to hold a mobile X-ray detector unit (25, 26). To generate X-ray recordings, X-ray radiation emitted by an active X-ray radiation unit (5, 6, 7) is detected by means of a mobile X-ray detector unit (25, 26), which is located in a detector holder (8, 9, 10, 11, 12) of said X-ray radiation unit (5, 6, 7).

Abstract: An X-ray imaging apparatus includes an X-ray irradiating unit configured to irradiate an X-ray to an object, an X-ray detecting unit configured to detect the irradiated X-ray, an image creating unit configured to create X-ray image data based on data detected by the X-ray detecting unit, a moving mechanism configured to move the X-ray detecting unit to the object, a capacitance sensing unit, including an electrode which is positioned so as to cover at least part of a detection plane of the X-ray detecting unit, configured to obtain a capacitance value of the X-ray detecting unit by the electrode and a distance measurement unit configured to measure a distance between the object and the X-ray detecting unit based on the capacitance value.

Abstract: The radiographic X-ray device according to this invention is constituted in such a way that positional relation detecting unit 25 detects in real time the information regarding the positional relations between X-ray imaging systems 4 and 8 that thoroughly represents the overall current status of the positional relations of external surfaces of both X-ray imaging systems 4 and 8 where collisions between first and second X-ray imaging systems 4 and 8 may occur, that the information regarding the positional relations detected by positional relation detecting unit 25 is taken into consideration in controlling the motions of X-ray imaging systems 4 and 8, and that the current status of the positional relations of external surfaces of both X-ray imaging systems 4 and 8 can be thoroughly and accurately reflected upon the motions of X-ray imaging systems 4 and 8 without any difficulty, so that any collisions of X-ray imaging systems 4 and 8 can be avoided without fail.

Abstract: The present invention is directed to an apparatus for supplying power to a rotatable x-ray tube for generation of an x-ray beam for acquisition of CT data. The apparatus includes a slip ring to transfer power from a stationary inverter to a rotatable HV tank. The HV tank conditions the transferred power and creates a voltage potential across the x-ray tube for x-ray generation. The inverter has a single or pair of series resonant circuits connected either directly to the slip ring or indirectly through a transformer to limit frequency content and reduce common-mode component of the voltage and current waveforms carried by the slip ring as well as reduce power losses.

Abstract: The present invention relates to a system and method by which the magnitude of an interfering electrical and/or magnetic field may be sampled locally (in the X-ray detector for example) and reduced or eliminated. More specifically, embodiments comprise a system and method by which an interfering field may be sampled within the same orientation as the X-ray detector panel, and then subtracted out of each respective element sample.

Abstract: An apparatus according to the invention includes a response coefficient to dose relationship memory for storing, in advance, a relationship of correspondence between intensities of an exponential function for impulse response and X-ray doses. The intensities of the exponential function determine conditions relating to an impulse response in a recursive computation performed to remove lag-behind parts from X-ray detection signals outputted from an FPD, thereby to obtain corrected X-ray detection signals. An impulse response coefficient setter sets an impulse response coefficient corresponding to an X-ray dose for an object under examination based on the relationship of correspondence between intensities of the exponential function and radiation doses. A time lag remover performs the recursive computation for time lag removal, with the intensity of an exponential function set to correspond to the X-ray dose for the object under examination.

Abstract: Certain embodiments of the present invention relate to a collision detection system. The collision detection system includes a position indicator for determining an actual position of a component connected to the collision detection system. The system also includes an error calculator for determining a position error between the actual position and a selected position. The system further includes a comparator for comparing the position error to a position error limit. The comparator generates a halt signal based on the position error and position error limit. The system also includes a motion controller for controlling motion of the component. The motion controller stops motion of the component based on the halt signal. The comparator generates a halt signal when the position error is equal to or greater than the position error limit.

Abstract: A flexible detector array transmission circuit (12) for an x-ray imaging system (10) may include an electrically conductive substrate layer (70) that is electrically coupled to a detector (68). A mono-directional conductive layer (80) is also electrically coupled to the substrate layer (70). One or more flexible circuit layers (72) are electrically coupled to the mono-directional conductive layer (80). The circuit layers (72) direct x-ray signals, generated from the detector (68), to a data acquisition system (42).

Abstract: This invention is to provide a system which has a plurality of sensor units and can efficiently sense an image. A sensing system includes a plurality of sensor units, a plurality of selection switches that are arranged in correspondence with the plurality of sensor units, respectively, and select corresponding sensor units, and a control circuit for setting a sensor unit selected by the selection switch in a ready state and an unselected sensor unit in a sleep state.

Abstract: The present invention is directed to an apparatus for supplying power to a rotatable x-ray tube for generation of an x-ray beam for acquisition of CT data. The apparatus includes a slip ring to transfer power from a stationary inverter to a rotatable HV tank. The HV tank conditions the transferred power and creates a voltage potential across the x-ray tube for x-ray generation. The inverter has a single or pair of series resonant circuits connected either directly to the slip ring or indirectly through a transformer to limit frequency content and reduce common-mode component of the voltage and current waveforms carried by the slip ring as well as reduce power losses.

Abstract: X- and y-axis moving mechanisms are provided for positioning a sample table in the x-axis and the y-axis directions. A yT-axis moving mechanism for moving those moving mechanisms in a direction along a tilting direction of a X-ray camera is provided separately from the x- and y-axes moving mechanisms. When the X-ray camera is tilted, the sample table is moved by the yt axis moving mechanism and a z-axis moving mechanism, whereby a viewpoint of the sample and a fluoroscopic magnification factor set before the X-ray camera is tilted are left unchanged. The coordinates on the sample table by the moving mechanisms before the X-ray camera is tilted can be used as they are even after the camera is tilted.

Abstract: A system for capturing an image of transmitted radiation includes transmission of a disable signal to disable a bias light of a camera at a time prior to transmission of radiation, and acquisition of an image from the camera during transmission of the radiation and during deactivation of the bias light. In some embodiments, the disable signal is transmitted in response to the reception of a pre-radiation signal, the pre-radiation signal indicating that transmission of the radiation will commence approximately one frame scan time after the pre-radiation signal is received, and the disable signal is transmitted approximately when the pre-radiation signal is received.

Abstract: The invention relates to an X-ray device in which a set of exposure parameters is fetched from among a number of such sets stored in a first storage arrangement for APR X-ray exposures. The exposure parameters which result therefrom during the subsequent X-ray exposure and have possibly been modified by the user are stored in a second storage arrangement. The X-ray device includes means for evaluating the second sets of exposure parameters which are associated with the same first set of exposure parameters and for deriving therefrom a new set of exposure parameters which is stored in the first storage arrangement instead of the first set of exposure parameters and forms the basis for APR X-ray exposures from then on.

Abstract: A system and method for providing pulsed power application for an x-ray tube that comprises an x-ray tube having an anode and cathode; and a power supply adapted to provide an anode-to-cathode gap accelerating potential and photons, wherein the gap voltage and photons are pulsed and received by the x-ray tube via a single cable from the power supply resulting in a pulsed x-ray radiation.

Abstract: A radiographing apparatus, is provided which includes a control section and a plurality of radiographing sections, each of which is connected to the control section. The control section establishes a standby mode in each of the radiography sections when each of the plurality of radiographing sections has been unused for a period of time which exceeds a predetermined time period.

Abstract: Since a notification unit (130) notifies a radiographer of the driving state of an X-ray detector (110), he/she can identify that the X-ray detector (110) is set in a detection signal accumulation state. When the irradiation button of an X-ray generation apparatus is then pressed, a subject can be irradiated with X-rays.

Abstract: In a solid-state radiation detector and a medical examination and/or treatment device having such a solid-state radiation detector, the detector has a pixel matrix, with each pixel supplying an output signal dependent on the incident radiation. The pixel matrix has a conversion layer that converts the incident radiation into charge, a storage capacitor for storing the charge and a transistor for reading out the charge. The capacitance of the storage capacitor is set to be so small that because of the voltage drop across the storage capacitor, the output signal of the pixel exhibits, starting from a specific value of the incident radiation dose, a sublinear response with reference to the radiation dose.

Abstract: An X-ray image diagnostic device of the invention has sensitivity-information-acquisition controlling means commanding synchronization between X-ray irradiation from the X-ray source and readout of X-ray plane detector for correcting sensitivity. When sensitivity information of the X-ray plane detector is calculated using the intensities of X-rays irradiated onto the X-ray plane detector and X-rays detected by the X-ray plane detector, readout of the X-ray plane detector is performed synchronously with X-ray irradiation, and sensitivity information corresponding to variation of the amount of X-ray radiation onto the X-ray plane detector during the reading time is determined using data of every readout channel. Therefore, sensitivity information enabling an accurate sensitivity correction can be obtained from a single output image. This sensitivity information is stored in sensitivity-information-storing means and used for correcting sensitivity of X-ray image data acquired in actual measurements.