TABLE I.
Performance of L(Y)SO PQS-Block Detectors
| Detector Application |
Animal PET |
Human PET |
|---|---|---|
| Scintillation Crystal | LYSO | LSO |
| Block size (mm3) | 18.6 ×18.6 ×10 | 49.7 ×49.7 ×20 |
| Crystal dimension (mm3) | 1.27 ×1.27 ×10 | 3.25 ×3.25 ×20 |
| Packing fraction | 95.6% | 98.2% |
| Decoding Resolution crystals per PMT |
196 crystals/PMT |
225 crystals/PMT |
| The peak to valley ratio of decoding map |
2.7 | 2.8 |
| Crystal signal pulse height range | 560~780 | 487~807 |
| Light collect efficiency | 71.8% | 60.3% |
| Crystal signal pulse heights of 4 regions |
1: 712 2: 674 3: 654 4: 626 |
1: 610 2: 595 3: 595 4: 610 |
| Light collect efficiency | 87.9% | 97.6% |
| Crystal energy resolution range | 11.9% ~ 18.6% | 12.0%~18.9% |
| Crystal energy resolution average | 14.1% | 15.6% |
| After symmetric restoration | ||
| Crystal signal pulse height range | 607~743 | 538~648 |
| Pulse height average | 680 | 605 |
| Light collect efficiency | 81.7% | 83.0% |
| Crystal energy resolution range | 12.9% ~ 15.8% | 13.5%~17.3% |
| Crystal energy resolution average |
14.1% | 15.6% |
| Crystal energy resolution of 4 regions |
1:14.1 2:13.9 3:13.9 4: 14.6 |
1: 15.4 2: 15.8 3: 15.3 4: 16.1 |
| Average spec peak | 679.9 ch | 602.9 ch |