Elscint Ltd.

Other

Daniel I Barnea

Carl R Crawford

Yair Shimoni

Moshe Epstein

A Robert Sohval

A CT scanner has an X-ray source for producing a fan beam that is rotatable relative to the axis of the scanner in a plane perpendicular to the axis, and a plurality of X-ray detectors mounted in a non-rotatable helical detector ring whose axis is colinear with the scannner axis for reeiving X-rays from the fan beam, the detectors extending 360.degree. around the axis. The detector ring has an inner surface facing the axis of the helix, and the detectors are mounted on the inner surface so that their photosensitive areas face the axis of the helix. At any given axial position of the detector ring, a given group of detectors will have an unobstructed view of certain of the X-ray sources through the space between adjacent leaves of the helix.

CT scanner with rotatable fan beam and non-rotatable detector ring

A vehicle comprises a chassis member, a ground engaging member mounted on the chassis member for supporting the same as the vehicle traverses a road surface, a load supporting member such as a seat mounted on the chassis mount, and an resilient component interposed between two of the members. An anticipating device monitors the condition of the road surface in advance of the point at which the ground engaging member engages the road surface; and the resilient component has an adjustment which is responsive to the anticipating device for dynamically controlling the spring constant of the resilient member as the ground engaging member engages the mounted point for the purpose of providing a controlled ride within the vehicle.

Vehicle suspension system

The system and method of the present invention minimizes artifacts caused by noncoplanarity between source and detector component in a computerized tomography system. The source component produces a beam of penetrating radiation which is rotatable about an axis and is incident on the detector component; and non-coplanarity is defined by the collection of the positions of the source component which defines a first plane, and by the collection of positions of the detector component which defines a second plane axially spaced from the first plane. Data obtained during a scan of a body located between the source and detector components are processed to form two images, one image being based on data related to one side of a focal plane interposed between the first and second planes, and another image being based on data related to the other side of the focal plane.

Systems and methods for minimizing noncoplanarity artifacts

A sector-scan ultrasonic imaging apparatus includes a biopsy attachment mounted on the housing of the imaging apparatus for positioning a biopsy needle relative to the ultrasonic scan head of the imaging apparatus. An image display device displays both an image of the region scanned by the scan head and a predetermined, superimposed electronic representation of the position of the biopsy needle-line relative to the probe scan head. The biopsy needle-line is calibrated with a scan head coordinate system which defines a sector sweep of the scan head by determining the coordinates of the needle-line in the scan head coordinate system independently of determining the particular spatial relationship of the needle-line in operative position relative to the scan head. A calibration member adapted to be mounted on the biopsy attachment includes at least two ultrasonic reflection regions which are scanned by the scan head during the calibration mode and displayed on an image display device. The display of these at least two reflection regions enables the needle-line coordinates to be determined using the predetermined geometric relationship of the calibration member with respect to the imaging apparatus housing. Alternatively, the calibration member can include a single ultrasonic reflection region, and an angular detector can be used to determine the angular orientation of the calibration member relative to the probe scan head, to enable the needle-line coordinates to be determined.

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Brookline, MA, United States of America

Daniel I Barnea