Patent application number | Description | Published |
20090252285 | CT SCANNER USING INJECTED CONTRAST AGENT AND METHOD OF USE - 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. | 10-08-2009 |
20090304142 | CT SCANNER WITH SCATTER RADIATION CORRECTION AND METHOD OF USING SAME - 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. | 12-10-2009 |
20100195804 | METHOD FOR CALIBRATION OF A CT SCANNER - A method for calibration of a CT scanner having an x-ray source and a detector having an axial extent in the scanner, the source being rotatable about an epicenter between the source and detector, the method comprising:
| 08-05-2010 |
20110007878 | IMAGING SYSTEM USING MULTISOURCE COLLIMATION AND A METHOD ASSEMBLY AND SYSTEM FOR PROVIDING MULTISOURCE COLLIMATION - 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. | 01-13-2011 |
20110033024 | CT CONE BEAM SCANNER - 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. | 02-10-2011 |
20110064190 | X RAY IMAGING SYSTEM WITH SCATTER RADIATION CORRECTION AND METHOD OF USING SAME - 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. | 03-17-2011 |
20110116697 | METHOD AND SYSTEM FOR CALIBRATING CT IMAGES - 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. | 05-19-2011 |
20120236987 | MULTIPLE ENERGY CT SCANNER - A CT scanner for multiple energy CT scanning of a subject having an X-Ray source adapted to rotate about the subject; and a detector array, having a plurality of detector elements, adapted to acquire attenuation data for X-Rays that have been attenuated by a subject disposed between said X-Ray source and said detector array, said detector array comprising at least two types of detector element, which are differ by their spectral response. The scanner is adapted to generate images associated with the different X-Ray energy spectra. | 09-20-2012 |
20140037045 | DUAL ENERGY CT SCANNER - A dual energy CT scanner includes an X ray source generating an X-ray beam, a stacked detector array for detecting radiation from the X-ray beam, the stacked detector array including a first layer of detectors and a second layer of detectors, wherein a packing density of detectors in at least a portion of the first layer is different than a packing density of detectors in a corresponding portion of the second layer, a data acquisition unit for sampling data from the detectors in the first and second layer; and an image reconstruction unit for reconstructing an image from data acquired from at least one layer of the stacked detector array. | 02-06-2014 |