摘要:
With minimizing extension of imaging time, the B 1 non-uniformity reducing effect of RF shimming is maximized for an imaging section of an arbitrary axis direction and an arbitrary position. B 1 distributions are measured for only several sections of one predetermined direction, and a radio frequency magnetic field condition that maximizes the B 1 non-uniformity reducing effect for an imaging section of an arbitrary direction and an arbitrary position is calculated from the B 1 distribution data. For example, after B 1 distributions of only several sections of the AX direction are measured, the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the AX direction is obtained by interpolation with optimal radio frequency magnetic field conditions calculated from B 1 distributions of two sections near the imaging section, and the optimal radio frequency magnetic field condition for an imaging section of an arbitrary position for the SAG or COR direction is obtained by using only B 1 values of a crossing region with the imaging section extracted from the B 1 distributions.
摘要:
A weight value used for a beamforming process performed on received signals in an ultrasound imaging apparatus is obtained with a small amount of computations and with a high degree of precision, even when a method of adaptive signal processing is employed. Multiple elements 401 receive ultrasound signals from a test subject, and the similarity operator 404 obtains the similarity between the received signals x(n). By using the similarity C(n) between the received signals obtained by the similarity operator 404, the adaptive weight operator 407 computes the adaptive weight w(n) in association with the similarity. The beamforming operator 408 uses the adaptive weight w(n) and the received signal x(n) to generate a beamforming output. The imaging processor 108 uses the beamforming output to generate image data. By way of example, the similarity operator 404 performs computations of the similarity in the time direction.
摘要:
Provided is an image diagnostic device with which it is possible to correct location misalignment of an image capture subject, and to improve the reliability of the result of the correction, in time series image data. An image diagnostic device is configured of: an input part (13) which receives image data input; a correction unit (14) which computes a correction vector which denotes location misalignment of an image capture subject, and selects image data used with an image correction unit; an image correction part (20) which carries out a correction process on the image data based on the correction vector and creates corrected image data; a control part (21) which controls the correction unit and the image correction part; a memory (22) which stores the corrected image data and measurement data as stored data; an output unit (23) which outputs the stored data externally; a display unit (24) which displays the stored data; and an external input device (30) where an operator makes an input operation
摘要:
Improvement is made in efficiency of positioning between images when comparing a plurality of images to perform a radiographic image interpretation in an image diagnosis assisting apparatus. An image diagnosis assisting apparatus, which assists an image diagnosis by use of registration among a plurality of images, comprises: a radiographic image interpretation terminal (104) for executing the registration; and storage devices (101, 103) for storing model images and the like to be used for the registration. The radiographic image interpretation terminal (104) executes the registration among the plurality of images by use of a positioning reference area, which was defined beforehand in a model image selected on the basis of both a purpose of checking the plurality of images and a part of interest and also by use of parameters of the registration determined on the basis of a manipulation of checking the plurality of images.
摘要:
The present invention provides a portable ultrasound system being superior in operability and design properties, and being allowed to take various storage postures fitting to the volume of a storage place. The keyboard unit 50 provided with an input device such as a keyboard and the display unit 80 incorporating a display part are mounted on the main body unit 30 that incorporates a main part of the ultrasound diagnostic system, respectively about the rotation axes P1 and P2, independently, in such a manner as rotatable, and further the rotation axes P1 and P2 are on a common axis P. The rotation axis part 200 supporting the display unit 80 is supported by the bearing of the main body unit in a part lower than the axis P, allowing the display unit to be rotatable about the rotation axis Q that is orthogonal to the axis P. With this configuration, it is possible to take an operating posture that allows the display unit 80 being upright to swivel, and multiple storage postures in which the posture of the main body unit 50 with respect to the keyboard unit 50 and the display unit 80 are variously changed.
摘要:
A magnetic resonance imaging device allowing favorable access of an operator to a subject at the time of imaging is provided. The magnetic resonance imaging device of the present invention comprises a gantry 100 and a bed part 200 comprising a top panel 201, the gantry 100 comprises a circumferential panel 120 covering outer circumference of a tunnel-shaped static magnetic field space, and a front panel 110 having an opening serving as entrance of a bore 101 for the static magnetic field space, this front panel 110 comprises an arc-shaped outer panel 111 extending from an upper part of the opening serving as entrance of the bore 101 to the ground plane via both sides of the opening, and an inner panel disposed inside the outer panel 111, a portion connecting the outer panel and the inner panel constitutes a top surface 102 protruding forwardly, and the inner panel 112 is formed in a recessed shape with a concave curved surface extending from the top surface to the opening serving as entrance of the bore 101.