New imaging systems in nuclear medicine
PCR-I, an analog coded single ring positron tomograph, demonstrates the concepts of analog coding and the utility of high resolution systems. PCR-I, with a resolution of 4.5mm, has been employed in a series of biological studies using small animals that have been highly successful and will lead to clinical application. The emphasis now is turning to even higher sensitivity instruments in order to provide adequate number of events to populate a volume image. For this purpose, we have designed and are constructing PCR-II, a cylindrical analog coded positron tomograph incorporating 12,800 small detectors coded to 1760 phototubes. The increased sensitivity is achieved by recording all events within a cylindrical source that produce annihilation radiation striking any point on the cylindrical detector. PCR-II is projected to have a sensitivity of 1.6 million counts per second for a 20 centimeter diameter sphere uniformly filled with activity at 1 /mu/Ci/cm/sup 3/. This system, with a resolution of 3mm, will approach the limits of sensitivity and resolution for positron tomographs. It is our opinion that this system will revolutionize the concept of positron imaging.
- Research Organization:
- Massachusetts General Hospital, Boston, MA (USA). Physics Research Lab.
- DOE Contract Number:
- FG02-87ER60519
- OSTI ID:
- 5942371
- Report Number(s):
- DOE/ER/60519-4; ON: DE89015459
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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