Investigation of conjugate imaging using small gamma cameras
Initial investigation of the use of full field-of-view small gamma cameras as the detectors of dedicated transportable conjugate imaging systems is reported. A single 4-PMT gamma camera is used to collect conjugate data from a phantom comprising two small (0.87 cm/sup 3/) hollow capsules in a water-...
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| Published in: | 1997 IEEE Nuclear Science Symposium Conference Record Vol. 2; pp. 1533 - 1536 vol.2 |
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| Main Authors: | , , , , , , , |
| Format: | Conference Proceeding |
| Language: | English |
| Published: |
IEEE
1997
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Initial investigation of the use of full field-of-view small gamma cameras as the detectors of dedicated transportable conjugate imaging systems is reported. A single 4-PMT gamma camera is used to collect conjugate data from a phantom comprising two small (0.87 cm/sup 3/) hollow capsules in a water-filled cylindrical tank (800 cm/sup 3/). The capsules and cylinder are filled with /sup 99m/Tc in a 14.5:1 ratio of activity concentrations. Emission and transmission images of the radioisotope-filled phantom are acquired. The transmission images, as well as flood images of the cameras, are acquired with a /sup 99m/Tc sheet source. Data processing of the conjugate image data incorporates corrections for radioactive decay, system sensitivity, and attenuation, including correction for self-attenuation in the source. Region-of-interest analysis on the conjugate mean images results in a 6.3% overestimation of the total activity in the phantom inserts. For comparison, data are acquired also with one head of a commercial three-head camera. |
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| ISBN: | 0780342585 9780780342583 |
| ISSN: | 1082-3654 2577-0829 |
| DOI: | 10.1109/NSSMIC.1997.670610 |