Directional radiation detector

• US 20080277591A1
• Filed: 05/08/2007
• Published: 11/13/2008
• Est. Priority Date: 05/08/2007
• Status: Abandoned Application

• Current Assignee: Orbotech Limited (KLA Corporation)
• Original Assignee: Orbotech Medical Solutions Ltd. (General Electric Company)
• Inventors: Shahar, Arie, El-Hanany, Uri, Gutman, Zeev
• Application Number:
  US11/801,084
• Publication Number:
  US 20080277591A1
• Time in Patent Office: Days
• US Class Current: 250/394
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/037 Emission tomography
• CPC Class Codes: A61B 6/4014 arranged in multiple source-detector units
• CPC Class Codes: A61B 6/463 characterised by displaying multiple images or images and diagnostic data on one display
• CPC Class Codes: A61B 6/469 for selecting a region of interest [ROI]
• CPC Class Codes: G01T 1/1611 using both transmission and emission sources sequentially SPECT imaging G01T1/1642; PET imaging G01T1/2985; detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects G01V5/20

Abstract

A method for imaging a body, including scanning the body so as to generate a tomographic image thereof, and analyzing the tomographic image to determine a location of a region of interest (ROI) within the body. The method includes providing single photon counting detector modules, each of the modules being configured to receive photons from a respective direction and to generate a signal in response thereto. The method further includes coupling each of the modules to a respective adjustable mount, adjusting each of the adjustable mounts so that the direction of the module coupled thereto is aligned with respect to the location so as to receive radiation from the ROI, operating each of the modules to receive the photons from the ROI, and, in response to the signal generated by each of the modules, generating a single photon counting image of the ROI.

Claims

1. A method for imaging a body, comprising:

scanning the body so as to generate a tomographic image thereof;

analyzing the tomographic image to determine a location of a region of interest (ROI) within the body;

providing a plurality of single photon counting detector modules, each of the single photon counting detector modules being configured to receive photons from a respective direction and to generate a signal in response thereto;

coupling each of the single photon counting detector modules to a respective adjustable mount;

adjusting each of the adjustable mounts so that the direction of the single photon counting detector module coupled thereto is aligned with respect to the location so as to receive radiation from the ROI;

operating each of the single photon counting detector modules to receive the photons from the ROI; and

in response to the signal generated by each of the single photon counting detector modules, generating a single photon counting image of the ROI.

2. The method according to claim 1, wherein scanning the body comprises scanning the body with an imaging system other than the plurality of single photon counting detector modules.

3. The method according to claim 2, wherein the imaging system comprises a computerized tomography imaging system.

4. The method according to claim 1, wherein each of the adjustable mounts is individually adjustable, and wherein adjusting the adjustable mounts comprises adjusting the mounts independently of each other.

5. The method according to claim 1, wherein adjusting each of the adjustable mounts comprises adjusting a distance of at least one of the modules from a surface of the body to be within a preset range.

6. The method according to claim 5, wherein the preset range is between of the order of 1 cm and 0 cm.

7. The method according to claim 1, wherein adjusting each of the adjustable mounts comprises measuring a location coordinate of at least one of the modules.

8. The method according to claim 1, wherein adjusting each of the adjustable mounts comprises measuring an orientation of at least one of the modules.

9. The method according to claim 1, wherein the plurality of the single photon counting detector modules are configurable in a multiplicity of system configurations wherein the modules receive the radiation from a multiplicity of respective different volumes enclosing the ROI.

10. The method according to claim 9, wherein scanning the body comprises arranging the plurality of the single photon counting detector modules in a first of the multiplicity to have a first volume enclosing the ROI, and wherein adjusting each of the adjustable mounts comprises arranging the plurality of the single photon counting detector modules in a second of the multiplicity to have a second volume enclosing the ROI and smaller than the first volume.

11. The method according to claim 1, wherein at least one of the single photon counting detector modules is operative in a first unit configuration wherein the at least one module is arranged to receive radiation from a first solid angle, and is operative in a second unit configuration wherein the at least one module is arranged to receive radiation from a second solid angle different from the first solid angle.

12. The method according to claim 1, wherein operating each of the single photon counting detector modules comprises operating the single photon counting detector modules in an operating mode selected from a group of modes comprising a rotational mode and a static mode.

13. The method according to claim 1, wherein the single photon counting image of the ROI comprises a single photon emission computerized tomography (SPECT) image.

14. Apparatus for imaging a body, comprising:

a plurality of single photon counting detector modules, each of the single photon counting detector modules being configured to receive photons from a respective direction and to generate a signal in response thereto;

a plurality of adjustable mounts respectively coupled to the single photon counting detector modules; and

a processor which is configured to analyze a tomographic image so as to determine a location of a region of interest (ROI) within the body, to adjust each of the adjustable mounts so that the direction of the single photon counting detector module coupled thereto is aligned with respect to the location so as to receive radiation from the ROI, to operate each of the single photon counting detector modules to receive the photons from the ROI, and in response to the signal generated by each of the single photon counting detector modules, to generate a single photon counting image of the ROI.

15. The apparatus according to claim 14, and comprising an imaging system, other than the plurality of single photon counting detector modules, which is configured to generate the tomographic image.

16. The apparatus according to claim 15, wherein the imaging system comprises a computerized tomography imaging system.

17. The apparatus according to claim 14, wherein each of the adjustable mounts is individually adjustable, and wherein adjusting the adjustable mounts comprises adjusting the mounts independently of each other.

18. The apparatus according to claim 14, wherein adjusting each of the adjustable mounts comprises adjusting a distance of at least one of the modules from a surface of the body to be within a preset range.

19. The apparatus according to claim 18, wherein the preset range is between of the order of 1 cm and 0 cm.

20. The apparatus according to claim 14, wherein adjusting each of the adjustable mounts comprises measuring a location coordinate of at least one of the modules.

21. The apparatus according to claim 14, wherein adjusting each of the adjustable mounts comprises measuring an orientation of at least one of the modules.

22. The apparatus according to claim 14, wherein the plurality of the single photon counting detector modules are configurable in a multiplicity of system configurations wherein the modules receive the radiation from a multiplicity of respective different volumes enclosing the ROI.

23. The apparatus according to claim 22, wherein analyzing the tomographic image comprises arranging the plurality of the single photon counting detector modules in a first of the multiplicity to have a first volume enclosing the ROI, and wherein adjusting each of the adjustable mounts comprises arranging the plurality of the single photon counting detector modules in a second of the multiplicity to have a second volume enclosing the ROI and smaller than the first volume.

24. The apparatus according to claim 14, wherein at least one of the single photon counting detector modules is operative in a first unit configuration wherein the at least one module is arranged to receive radiation from a first solid angle, and is operative in a second unit configuration wherein the at least one module is arranged to receive radiation from a second solid angle different from the first solid angle.

25. The apparatus according to claim 14, wherein operating each of the single photon counting detector modules comprises operating the single photon counting detector modules in an operating mode selected from a group of modes comprising a rotational mode and a static mode.

26. The apparatus according to claim 14, wherein the single photon counting image of the ROI comprises a single photon emission computerized tomography (SPECT) image.

27. Apparatus for imaging a region of interest (ROI) within a body having an outer surface, comprising:

a single photon counting detector module comprising;

a two-dimensional array of photon counting detectors, each of the detectors being configured to generate a signal indicative of a radio-isotope concentration in the ROI in response to a respective flux of photons received from the radio-isotope concentration; and

a plurality of collimator channels respectively coupled and aligned with the photon counting detectors in the two-dimensional array so that each of the photon counting detectors is able to receive the respective flux of the photons via its coupled collimator channel, the plurality of collimator channels being connected together so as to form a module outer surface; and

an adjustable mount to which the module is fixedly connected and which is configured to set an orientation of the module with respect to the ROI and to set a location of the module outer surface with respect to the outer surface of the body so that all of the photon counting detectors are able to simultaneously receive from the ROI the respective flux of the photons.

28. A method for imaging a region of interest (ROI) within a body having an outer surface, comprising:

providing a single photon counting detector module comprising a two-dimensional array of photon counting detectors, each of the detectors being configured to generate a signal indicative of a radio-isotope concentration in the ROI in response to a respective flux of photons received from the radio-isotope concentration;

coupling and aligning a plurality of collimator channels respectively with the photon counting detectors in the two-dimensional array so that each of the photon counting detectors is able to receive the respective flux of the photons via its coupled collimator channel;

connecting the plurality of collimator channels together so as to form a module outer surface;

fixedly connecting an adjustable mount to the module; and

configuring the mount to set an orientation of the module with respect to the ROI and to set a location of the module outer surface with respect to the outer surface of the body so that all of the photon counting detectors are able to simultaneously receive from the ROI the respective flux of the photons.