Arineta Ltd.

Koninklijke Philips Corporation N.v.

Cmt Medical Technologies Ltd.

Elscint Ltd.

Philips Medical Systems Technologies Ltd.

Marconi Medical Systems Israel Ltd.

Picker Medical Systems, Ltd.

Marconi Medical Systems Isreal Ltd.

Ehud Dafni

David Ruimi

Simha Levene

Olga Shapiro

Rafael Shmeul Brada

Rafi Brada

David A Freundlich

Amiaz Altman

Ilan Sivan

Uri Shreter

Andre Feldman

Haim Gelman

James W Green

Armin Marcovitch

Opher Zahavi

Aviv Hirshenbein

Ehud Nahaliel

Disclosed is a collimator assembly for a multi-radiation-source medical imaging system (e.g. CT) and a medical imaging system utilizing the collimator. According to some embodiments of the present invention, there is provided a collimator assembly including at least two apertures, which apertures are adjustable substantially synchronously by one or more actuators.

Imaging system using multisource collimation and a method assembly and system for providing multisource collimation

A CT scanner with scatter correction device and a method for scatter correction are provided. The method comprises positioning shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.

X ray imaging system with scatter radiation correction and method of using same

A method of correcting CT numbers in image data includes selecting at least one reference region in a CT image, wherein the selected region is a region associated with substantially same CT number when no artifacts are present in the CT image, estimating artifacts in at least one other region of the CT image based at least in part on detected CT numbers in the at least one reference region, and correcting CT numbers in the at least one other region of the CT image based on the estimated artifacts.

Method and system for calibrating CT images

A CT scanner comprising: a rotor rotatable about an axis of rotation: an X-ray source mounted to the rotor having a focal spot from which an X-ray beam emanates; an X-ray detector array comprising a plurality of X-ray detectors for detecting X-rays in the X-ray beam; wherein the detector array has at least one high resolution region in which detectors have a high packing density and at least one low resolution region in which detectors have a low packing density and are separated by X-ray insensitive regions substantially larger than insensitive regions resulting from septa between detectors that function to reduce detector cross talk.

Graded resolution field of view CT scanner

X-ray tube

A CT scanner comprises at least one cone beam x-ray source assembly mounted on a gantry frame, the gantry frame rotatable about a rotation axis, the x-ray source assembly operable to emit a cone beam at an orientation with respect to the rotation axis, and a controller operable to adjust an orientation of the cone beam during a rotation cycle of the gantry, wherein the controller adjusts the orientation to radiate a substantially same volume of interest over the rotation cycle.

CT cone beam scanner

An X-ray source system for a CT scanner includes a plurality of X-ray sources, wherein each X-ray source of the plurality is provided with a cathode from which an electron beam is emitted, an anode to receive the electron beam and at least one grid electrode, wherein the grid electrodes are configured to selectably block radiation from said X-ray sources; a high voltage generator for applying voltage to the plurality of X-ray sources, wherein each of the plurality of X-ray sources are configured to present substantially the same load to the high voltage generator; a grid modulator configured to apply voltage to grid electrodes of each of the plurality of X-ray sources in turn; and a controller for controlling the grid modulator so that only one of the plurality of X-ray sources emits radiation at any one time.

Cone-beam CT

Disclosed are methods, circuits, devices, assemblies and systems for performing Computer Tomography (CT)&#x2014;for example of a periodically moving object such as a heart. According to some embodiments, there is provided a Computer Tomography scanner which includes an x-ray source adapted to generate an x-ray scan beam and a electromechanical assembly to which the x-ray source is mounted. The assembly may be adapted to move one or more electromechanical elements such that the scan beam is moved around the periodically moving object with a velocity profile having both constant and cyclically alternating rotational velocity components, and wherein the cyclically alternating velocity components are synchronized with the periodic motion of the object.

Methods, circuits, devices, apparatus, assemblies and systems for computer tomography

A method for calibration of a CT comprises sequentially positioning a phantom having a non-circular cross section and a length commensurate with the extent of a detector at a plurality of positions between an X ray source and the detector array or sequentially positioning a plurality of generally similar phantoms or sequentially positioning a same phantom at a plurality of positions between the X ray source and detector array of the CT scanner; acquiring calibration attenuation data for X rays that have been attenuated by traversing the phantom positioned at each of the plurality of positions; and calculating calibration corrections for CT scanner scan data from the calibration attenuation data.

Method for calibration of a CT scanner

A CT scanner includes a first X-ray beam source, and a second X-ray beam source. With such an apparatus, first source is used to monitor buildup of an injected contrast agent in a selected region of interest relative to a patient and at least the second source is used to perform diagnostic scanning when the buildup of the contrast agent reaches a desired level.

CT scanner using injected contrast agent and method of use

A CT scanner with scatter correction device and a method for scatter correction are provided. The method of correcting CT images from artifacts caused by scattered radiation comprises affixing to the non-rotating frame of the CT gantry a plurality of shields for shielding some of the CT detector elements from direct X ray radiation, while allowing scattered radiation to arrive at said shielded elements; measuring scatter signals from said shielded elements, indicative of scattered radiation intensity; and correcting for scatter by subtracting scatter intensity values estimated from said measured scatter signals from signals measured by unshielded detector elements.

CT scanner with scatter radiation correction and method of using same

A CT scanner for scanning a subject is provided, the scanner comprising: a gantry capable of rotating about a scanned subject; at least two cone beam X-Ray sources displaced from each other mounted on said gantry; at least one 2D detector array mounted on said gantry, said detector is capable of receiving radiation emitted by said at least two X-Ray sources and attenuated by the subject to be scanned; a first image processor capable of generating and displaying CT images of a volume within the subject; a second image processor capable of generating projection X-Ray images of said volume, wherein the images are responsive to X-Ray separately emitted by each of said at least two cone beam X-Ray sources; and a third image processor capable of generating and displaying fluoroscopic images composed of said projection X-Ray images, wherein said fluoroscopic images are spatially registered to said CT images.

Apparatus and method for tracking feature's position in human body

Apparatus for CT cone beam scanning, comprising:

An apparatus and method for optimally positioning a region of interest of a subject for imaging by a CT scanner. The scanner provides a source of one or more X-ray beams, at least one of which is used for acquiring a CT image of the subject, a movable support for the subject, and a controller that controls the X-ray source. To position the region of interest of the subject, the controller operates to illuminate the subject with X-rays to acquire stereo image data for the region of interest and controls the position of the support responsive to the stereo image data.

Growing community of inventors

Caesarea, Israel

Ehud Dafni