Patent Number: 
Section: claims

1. A method of constructing a multi-divergent beam collimator, the method comprising:partitioning a convergent cone-beam collimator into a plurality of ordered regions;separating members of the plurality of ordered regions from each other; andreassembling in a substantially reversed order the separated members of the plurality of ordered regions, such that the collimator is configured to act as a multi-divergent beam collimator. 2. The method of claim 1, wherein the partitioning comprises partitioning the cone-beam collimator into regions having substantially equal dimensions. 3. The method of claim 1, wherein the partitioning comprises partitioning the cone-beam collimator into regions having different dimensions. 4. The method of claim 1, wherein a plurality of outer regions of the ordered regions have dimensions larger than a plurality of central regions. 5. The method of claim 1, wherein the partitioning comprises portioning the cone-beam collimator into a 3-by-3 array of ordered regions. 6. The method of claim 1, wherein the partitioning comprises portioning the cone-beam collimator into a 2-by-3-by-2 array of ordered regions. 7. An apparatus comprising:a plurality of ordered sections of a convergent cone-beam collimator reassembled in a substantially reversed order relative to the ordering of the sections of the cone-beam collimator, wherein the collimator is positionable to function as a multi-divergent-beam collimator. 8. The apparatus of claim 7, wherein each of the sections has substantially similar dimensions. 9. The apparatus of claim 7, wherein some of the plurality of sections have dimensions different from others of the plurality of sections. 10. The apparatus of claim 7, wherein a plurality of outer regions of the ordered regions sections have dimensions larger than those of a plurality of central regions. 11. The apparatus of claim 7, wherein the plurality of sections are portioned into a 3-by-3 array of ordered regions. 12. The apparatus of claim 7, wherein the plurality of sections are portioned into a 2-by-3-by-2 array of ordered regions. 13. A single photo emission computed tomography (SPECT) system, comprising:a camera comprising a detector and a collimator, the collimator comprising a plurality of ordered sections of a convergent cone-beam collimator reassembled in a substantially reversed order relative to the ordering of sections of in the cone-beam collimator, wherein the collimator is positionable to function as a multi-divergent beam collimator; anda computing system in communication with the camera, the computing system receiving measurements from the camera and processing the received measurements. 14. The SPECT system of claim 13, wherein the camera is substantially stationary. 15. The SPECT system of claim 13, wherein each of the sections has substantially similar dimensions. 16. The SPECT system of claim 13, wherein some of the sections have different dimensions. 17. The SPECT system of claim 13, wherein a plurality of outer regions of the ordered sections have dimensions larger than those of a plurality of central regions. 18. The SPECT system of claim 13, wherein the plurality of sections are portioned into a 3-by-3 array of ordered regions. 19. The SPECT system of claim 13, wherein the plurality of sections are portioned into a 2-by-3-by-2 array of ordered regions.