| Autor: |
Inadama, Naoko, Murayama, Hideo, Watanabe, Mitsuo, Omura, Tomohide, Yamashita, Takaji, Kawai, Hideyuki, Umehara, Takaya, Kasahara, Takehiro, Orita, Narimichi, Tsuda, Tomoaki |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Nuclear Science; Feb2004 Part 1 of 2, Vol. 51 Issue 1, p58-62, 5p |
| Abstrakt: |
A 256ch flat panel position sensitive photomultiplier tube (FP-PMT) is a promising device for a PET detector because of its large opening area, 52 mm × 52 mm, and small dead space. The useful area of the 256ch FP-PMT is 89% to the opening area. The 256ch FP-PMT contains 16 × 16 matrix anodes with 3.04mm intervals between them so that the 256ch FP-PMT affords optical coupling with a 16 × 16 array of scintillation crystals having 3 mm pact volume and less weight for the PET apparatus. Using a prototype 256ch FP-PMT, we measured light spread function of a central anode and crystal identification ability with 2.9 mm × 2.9 mm × 7.5 mm Gd2SiO5 (GSO) crystals. The full width at half maximum of the light spread function was found to be 4.6 mm. As regards positioning performance, the resultant positioning image map assures its capability for crystal identification in a 16 × 16 array of the GSO crystals. For the use of a 256ch FP-PMT having a large useful area, we made a new proposal for easier construction of an array with many crystal elements. The way utilizing multilayer polymer mirrors, a reflector, properly processed by laser can be applied to other various shaped detectors. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
