Patent application number | Description | Published |
20080237472 | Adjustable collimators method and system - Embodiments relate to collimator assemblies having one or more apertures therein. At least one of the one or more apertures has an aperture size that is configured for adjustment during an examination. The collimator assembly is configured so that gamma rays can pass through the one or more apertures, but the remainder of the collimator assembly is substantially gamma ray absorbent. Embodiments also related to imaging systems and methods of imaging. | 10-02-2008 |
20080237473 | Adjustable slit collimators method and system - Embodiments relate to a slit collimator assembly including a first set of panels spaced at least partially around a longitudinal axis of the collimator assembly and extending generally parallel to the longitudinal axis. The slit collimator assembly further includes a second set of panels spaced at least partially around longitudinal axis of the collimator assembly and extending generally parallel to the longitudinal axis. The first set of panels and the second set of panels are arranged to define one or more slit apertures. The slit collimator assembly is configured so that movement of at least one of the first set of panels or the second set of panels adjusts an aperture size of at least one of the one or more slit apertures. The slit collimator assembly is configured so that gamma rays can pass through the one or more slit apertures, but the remainder of the collimator assembly is substantially gamma ray absorbent. Embodiments also relate to imaging systems and methods of changing collimator performance. | 10-02-2008 |
20080237476 | ADJUSTABLE PINHOLE COLLIMATORS METHOD AND SYSTEM - Embodiments relate to pinhole collimator assemblies having one or more adjustable size pinhole apertures therein. The pinhole collimator assembly is configured so that gamma rays can pass through the collimator assembly, but the remainder of the collimator assembly is substantially gamma ray absorbent. Embodiments also relate to imaging systems and methods of adjusting pinhole collimator performance. | 10-02-2008 |
20080296482 | METHOD AND SYSTEM OF OPTICAL IMAGING FOR TARGET DETECTION IN A SCATTERING MEDIUM - A method and system for fluorescence imaging of a target in a subject comprising a scattering medium is provided. The method comprises illuminating one or more points on a surface of the scattering medium using an illumination source, wherein the plurality of points define an illumination region, collecting emitted light from an illumination region and an area away from the illumination region, and generating an image of the scattering medium using the emitted light. | 12-04-2008 |
20080304619 | Modular Multi-Hole Collimators Method and System - Embodiments of the present technique relate to a modular multi-hole collimator assembly configured to have an adjustable length. Each of the two or more multi-hole collimator units has a plurality of holes therethrough. Exemplary embodiments also relate to a modular multi-hole collimator assembly that includes a base multi-hole collimator unit and one or more multi-hole collimator extension units. Each of the base multi-hole collimator unit and the one or more multi-hole collimator extension units has a plurality of holes therethrough. At least one of the plurality of holes through the base multi-hole collimator unit and at least one of the holes through the one or more multi-hole collimator extension units are axially aligned. | 12-11-2008 |
20090022278 | Adjustable-Focal-Length Collimators Method and System - Embodiments relate to an imaging system that includes a collimator assembly having one or more pinhole apertures therein. The imaging system is configured so that one or more of the pinhole apertures has an adjustable focal length. The imaging system further includes a detector assembly configured to generate one or more signals in response to gamma rays that pass through the one or more pinhole apertures. Embodiments also relate to methods of changing collimator performance and methods of imaging a volume. | 01-22-2009 |
20090296890 | APPARATUS AND METHOD FOR IMAGE RECONSTRUCTION FOR A SYNTHETIC APERTURE GAMMA RAY IMAGER - An imaging system includes a platform having mounted thereon a coded-aperture imaging device and positioned to receive radiation over a baseline. The imaging system includes a computer configured to acquire a plurality of far-field datasets over the baseline, the plurality of far-field datasets comprising data received via the coded-aperture imaging device. The computer is also configured to form a preliminary image based on the acquired plurality of far-field datasets, and apply an expectation maximization (EM) algorithm to the preliminary image; wherein the EM algorithm includes an ordered subset algorithm. | 12-03-2009 |
20110220783 | METHODS AND SYSTEMS FOR CALIBRATING A NUCLEAR MEDICINE IMAGING SYSTEM - Methods and systems for calibrating a nuclear medicine imaging are provided. One method includes acquiring spatially determined non-uniform radiation flux information from a calibration scan of a calibration source using a gamma camera having an attached non-parallel-hole collimator. The method further includes determining a measured non-uniform count density profile from the acquired non-uniform radiation flux information. The method also includes creating a gamma camera uniformity correction map derived from (i) the measured non-uniform count density profile and (ii) a modeled or calculated non-uniform count density profile for calibrating the NM imaging system. | 09-15-2011 |
20120108948 | SYSTEM AND METHOD FOR COLLIMATION IN DIAGNOSTIC IMAGING SYSTEMS - A system and method for collimation in diagnostic imaging systems is provided. One collimation system includes a collimator for a radiation imaging detector having a plurality of adjustable segments and a plurality of collimator holes within each of the plurality of adjustable segments. The plurality of adjustable segments are configured to move independently of a detector to adjust a field of view of the collimator holes. | 05-03-2012 |
20120305781 | SYSTEM AND METHOD FOR COLLIMATION IN DIAGNOSTIC IMAGING SYSTEMS - A system and method for collimation in diagnostic imaging systems is provided. One collimator includes a plurality of parallel hole segments and a plurality of collimator bores within each of the plurality of parallel hole segments. Additionally, all of the plurality of collimator bores in at least one of the plurality of parallel hole segments have a first pointing direction and all of the plurality of collimator bores in at least one other of the plurality of parallel hole segments have a second pointing direction, wherein the plurality of parallel hole segments are arranged in a fanbeam collimation configuration. Further, the first pointing direction is different than the second pointing direction. | 12-06-2012 |
20130126744 | IMAGING DETECTOR AND METHOD OF MANUFACTURING - Imaging detectors and methods of manufacturing are provided. One imaging detector includes a first detector layer within a detector module and a second detector layer within the detector module and spaced apart from the first detector layer, wherein the second detector layer has an opening therethrough. The imaging detector also includes a collimator mounted to the detector module, wherein the collimator is one of a single pinhole collimator or a multi-pinhole collimator. Additionally, the second detector layer is mounted within the detector module closer to an opening of the collimator than the first detector layer. | 05-23-2013 |
20130161520 | SYSTEM AND METHOD FOR COLLIMATION IN IMAGING SYSTEMS - A system and method for collimation in imaging systems are provided. One system includes a collimator a collimator body and at least one set of pinholes within the collimator body defining a cluster of pinholes, wherein bores defining the pinholes within the cluster are aligned to a point in substantially the same direction. Additionally, a spacing between bores is less than four times a diameter of a largest bore. | 06-27-2013 |
20140075734 | SYSTEM AND METHOD FOR COLLIMATION IN DIAGNOSTIC IMAGING SYSTEMS - A system and method for collimation in diagnostic imaging systems is provided. One collimator includes a plurality of parallel hole segments and a plurality of collimator bores within each of the plurality of parallel hole segments. Additionally, all of the plurality of collimator bores in at least one of the plurality of parallel hole segments have a first pointing direction and all of the plurality of collimator bores in at least one other of the plurality of parallel hole segments have a second pointing direction, wherein the plurality of parallel hole segments are arranged in a fanbeam collimation configuration. Further, the first pointing direction is different than the second pointing direction. | 03-20-2014 |
20140138556 | COLLIMATORS FOR SCAN OF RADIATION SOURCES AND METHODS OF SCANNING - Collimators for two-dimensional scans of a radiation sources and methods of scanning are provided. One system includes a scan unit for scanning and collecting ionizing radiation emitted from a radiation emitting object is provided. The scan unit includes an array of at least one pixelated radiation detector having an imaging surface including a two-dimensional (2D) array of pixels. The scan unit also includes a collimator positioned between the radiation detector and the radiation emitting object, with the collimator including a 2D array of columns having openings and septa forming bores, wherein the columns are arranged in groups along rows of the 2D array of columns and the bores within one of the groups have a different aspect ratios than the bores in another one of the groups. | 05-22-2014 |