Abstract: It is an object of the invention to display an image during the freeze mode or the cine reproduction mode which has a degree of averaging different from images displayed during the real-time display mode. During the real-time display mode, images are displayed based on the averaged image data F.sub.n. During the freeze mode or the cine reproduction mode, a plurality of sets of averaged image data F are read from a cine memory 3 and a calculation is performed thereon in the calculator 10 to generate averaged image data G having a degree of averaging different from the averaged image data F or unaveraged image data G. Then an image based on the data G is displayed.

Abstract: In order not to nip the clothes or skin of a subject between the joining portions of coil members when a detecting coil for a magnetic resonance diagnostic apparatus is fitted around a region of the subject such as the leg or neck, the detecting coil 100 for a magnetic resonance diagnostic apparatus, which can be separated into an upper coil member 10 and a lower coil member 20 and has an annular shape when these members 10, 20 are integrally joined, is provided at the joining portions of the lower coil member 20 with guards 27, 28 of a silicone rubber having a hardness of Hs80.

Abstract: In order to prevent image quality degradation which occurs when a flow compensating pulse is applied in a pulse sequence according to the fast spin echo technique, a bipolar pulse constituted of gzfcf and gzmfcf (FIG. 5) is incorporated in the slice gradient before an inversion pulse applied immediately before the flow compensating pulse constituted of fcrdep and fcrrep incorporated in the read gradient in the pulse sequence, thereby imparting a phase shift equal to a non-linear phase shift due to the flow compensating pulse constituted of fcrdep and fcrrep.

Abstract: For the accurate measurement of the phase shift of echos caused by the inference of the eddy current and residual magnetization attributable to the encode gradient and the like, the measuring process includes the steps of emitting an excitation pulse R, emitting an inversion pulse P1, applying an encode gradient gyn to the phase axis, applying a read gradient gxr, which is the former half of the usual read gradient, to the read axis, applying a rewind gradient gyrn in which a compensation pulse gypn is put to the phase axis, emitting an inversion pulse P2, applying a dephaser gradient gywdn to the phase axis, sampling data from the echo echo2 while applying a readout gradient gywn to the phase axis, evaluating the phase shift value of the echo2 caused by the influence of the encode gradient gyn and rewind gradient gyrn based on phase data resulting from the first-order Fourier transform for the sampled data, determining the correction value from the resulting phase shift value, revising the compensation pulse

Abstract: In order to provide a phased-array coil having a highly homogeneous sensitivity region, an opposing coil set 10 composed of a pair of gutter-shaped coils 10a and 10b whose concave surfaces face each other, an opposing coil set 20 composed of a pair of gutter-shaped coils 20a and 20b whose concave surfaces face each other, an opposing coil set 30 composed of a pair of gutter-shaped coils 30a and 30b whose concave surfaces face each other, and an opposing coil set 40 composed of a pair of gutter-shaped coils 40a and 40b whose concave surfaces face each other are disposed around the center axis J of an imaginary cylinder at an angular spacing of 45.degree., with each coil overlapping the adjacent ones by about 10% of the coil surface area, to be assembled into a cylindrical shape as a whole.

Abstract: In order to reduce the impedance of an ultrasonic transducer array, an ultrasonic probe is provided in which a plurality of holes 34 are disposed running in the thickness direction of a piezoelectric material plate 32 and electrodes 36 are provided on the internal walls of the holes so as to exploit the ultrasonic vibration of the wall of piezoelectric material between the adjacent holes according to the electromechanical coupling coefficient k.sub.31. An ultrasonic imaging apparatus employing such an ultrasonic probe is also provided.

Abstract: In order for image data pixel value ranges for several slices to be contained within the same preferred range, an x-ray computed tomography method and apparatus comprises an x-ray source 2 for emitting x-rays toward a subject, an x-ray detector 3 for detecting subject transmission information of the emitted x-rays and control means 15 for controlling the x-ray emission and detection, wherein the control means exerts the control so as to, prior to the tomographic imaging of the subject, produce scout images by fixing the angular position of the x-ray source at two different angular positions and performing the scout imaging of the subject respectively at the angular positions; calculates a scanning condition with reference to the standard deviation of image data based on the area of projection display data, a desired standard deviation of the image data and the pixel value attenuation ratio between the scout images acquired respectively at the two angular positions of the x-ray source; and exerts the control s

Abstract: In order to shorten imaging time in MR imaging, when a partial region A1 is imaged using a fast pulse sequence, a selectively excited region E90 and a selectively inverted region E180 are intersected with each other so as not to include a partial region A2 to be imaged next within the selectively excited region E90 and the selectively inverted region E180.

Abstract: In an X-ray CT imaging apparatus which is designed to produce a CT image in a short time, a master processor (MP) converts fan-view image data produced by multiple X-ray sensors into para-view image data, and thereafter distributes the resulting data to slave processors (SP1 through SP4), which are also supplied with modification data (B1 through B4). The slave processors (SP1 through SP4) implement the first pre-processing, second pre-processing, FBP process and post processing continuously, thereby producing BP data (I1 through I4). The master processor (MP) collects and composes the BP data (I1 through I4) to produce a CT image.

Abstract: In order to enable the application of a forcible recovery pulse to the multi-slice technique, when selective inversion pulses satisfy the CPMG condition or the CP condition and ETL (Echo Train Length) is even, a dummy selective inversion pulse is applied at the end of each pulse sequence of the fast spin echo technique for each slice, then a dummy read axis gradient is applied without acquiring MR data, then a refocusing pulse selective of only the current slice is applied, and subsequently a forcible recovery pulse sequence FR selective of only the current slice is applied.

Abstract: In order to decrease the amount of operation required for an operator to move a cursor and in order to allow the operator to distinctly view deviation of CRL (Crown Rump Length) of a fetus from a normal value, when an ultrasonic image of a fetus F is displayed and a first cursor C1 is positioned at the head (or the rump) of the fetus F, a second cursor C2 is initially displayed at a position which corresponds to a normal CRL obtained from GA (Gestation Age) estimated from the last menstruation date. When the second cursor C2 is moved and positioned at the rump (or the head) of the fetus F, the measured CRL and GA estimated therefrom are displayed.

Abstract: In order to obtain a tomographic image close to a stationary image using opposite view data, a radiation tomography method and apparatus are provided for measuring projection data representing a subject by radiation beams in a plurality of view directions around the subject; calculating estimated projection data for each of the plurality of view directions by performing a weighting calculation on data elements of the projection data generated by radiations which transmit through the same path in opposite directions so that a desired time phase for the subject is centrally weighted; and producing a tomographic image of the subject based on the estimated projection data.

Abstract: In order to improve the operational efficiency and mitigate the burden for a subject, there is provided a table comprising a table body 41 which can be moved upwardly and downwardly, and a cradle 42 disposed over the table body 41 and having a cradle body portion 42c on which the subject 30 is to be mounted and an extending portion (first extending portion) 42a projecting laterally from at least one lateral portion of the cradle body portion 42c and extending to the vicinity of a mat 32 on a carrying means (stretcher) 25 alongside, the extending portion 42a being for use in shifting the subject 30 on the carrying means 25 to the cradle body portion 42c.

Abstract: For the purpose of supporting the subject's head corresponding to the motion of the subject's neck, there is provided a neck fixing apparatus comprising a base disposed on a surface on which the subject is mounted, an arm extending along the body axis of the subject to be mounted and pivotally attached to the base, and a head rest 82 for mounting the subject's head, movably attached to the arm and movable along the arm 60.

Abstract: Composite piezo-electric members having an intended structure are fabricated based on the LIGA process which includes the exposure of synchrotron radiation X-rays, development and lithography. With the intention of reducing the cost of the X-ray exposure mask, it is made of wire gauze having a regular pattern and formed by electrocasting.

Abstract: With the intention of producing a tomographic image having information in depth direction in a short time, image data is produced from multiple tomographic images and a projection process is implemented for extracting a certain value from the image data at a corresponding position of the tomographic images, with the projection process being ended after the value of image data along the direction of projection process has passed a first threshold value and when the value comes to a second threshold value.

Abstract: To make it possible to decrease an X-ray exposure on an operator and to obtain an image of high quality upon fluoroscopy operation an X-ray tube is rotated to acquire data, an X-ray radiation dose is set to "0" in a predetermined angular range including an angle at which the alignment of the X-ray tube with the operator's hand is brought about, and the X-ray radiation dose is set to an ordinary one at an angle in a range other than that angular range. The predetermined angular range is established using a light beam which enables to see what part of the field has no X-ray radiation exposure, thereby increasing his safety.

Abstract: An ultrasonic imaging apparatus devised to implement contrast imaging of enhanced S/N ratios. The apparatus comprises: an exciting unit for generating ultrasonic waves by stimulating a contrast medium introduced into a target object; a contrast image creating unit for creating a contrast image based on the ultrasonic waves generated through stimulation; an echo generating unit for generating echoes of the ultrasonic waves transmitted into the target object; an echo image creating unit for creating an echo image based on the generated echoes; and a display unit for superimposing the contrast image and the echo image for display.