Chinese Physics C > 2006, Vol. 30 > Issue(3): 264-267

Optimization of Crystal Surface Treatment for a Double Layer Depth of Interaction Detector

TIAN Yi,
LIU Hua-Feng^,

State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China

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Abstract：
A depth of interaction (DOI) detector for γ-rays has been developed for a high-resolution positron emission tomography (PET) system dedicated to small animal studies. It is well known that different surface treatment on the crystals influences the total light output, and consequently affects the performance of the detectors. In order to optimize the performance of the new proposed DOI detector, we have focused on the comparison of the detectors consisting of narrow LSO crystals with different surface conditions. We observed a significant improvement in crystal identification, energy resolution, time resolution and detector response resolution for constructing detectors using polished crystals compared to those using roughened LSO crystals. The results of this study can provide useful information for LSO detectors to be used in practical PET systems.

References

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TIAN Yi and LIU Hua-Feng. Optimization of Crystal Surface Treatment for a Double Layer Depth of Interaction Detector[J]. Chinese Physics C, 2006, 30(3): 264-267.

TIAN Yi and LIU Hua-Feng. Optimization of Crystal Surface Treatment for a Double Layer Depth of Interaction Detector[J]. Chinese Physics C, 2006, 30(3): 264-267. shu

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Received: 2005-07-25
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Optimization of Crystal Surface Treatment for a Double Layer Depth of Interaction Detector

TIAN Yi
LIU Hua-Feng^,

Corresponding author:LIU Hua-Feng,

State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China

Received Date:2005-07-25
Accepted Date:1900-01-01
Available Online:2006-03-05

Abstract:A depth of interaction (DOI) detector for γ-rays has been developed for a high-resolution positron emission tomography (PET) system dedicated to small animal studies. It is well known that different surface treatment on the crystals influences the total light output, and consequently affects the performance of the detectors. In order to optimize the performance of the new proposed DOI detector, we have focused on the comparison of the detectors consisting of narrow LSO crystals with different surface conditions. We observed a significant improvement in crystal identification, energy resolution, time resolution and detector response resolution for constructing detectors using polished crystals compared to those using roughened LSO crystals. The results of this study can provide useful information for LSO detectors to be used in practical PET systems.