A  New  Design  of  Online  Updatable  Lookup table  Electronics  for  PET

LI  Lun; WANG  Shi; LIU  Ya-qiang#; KANG  Xiao-wen; SUN  Xi-shan; JIN Yong-jie

doi:10.11804/NuclPhysRev.27.01.056

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Article Navigation > Nuclear Physics Review > 2010 > 27(1): 56-62

LI Lun, WANG Shi, LIU Ya-qiang#, KANG Xiao-wen, SUN Xi-shan, JIN Yong-jie. A New Design of Online Updatable Lookup table Electronics for PET[J]. Nuclear Physics Review, 2010, 27(1): 56-62. doi: 10.11804/NuclPhysRev.27.01.056

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LI Lun, WANG Shi, LIU Ya-qiang#, KANG Xiao-wen, SUN Xi-shan, JIN Yong-jie. A New Design of Online Updatable Lookup table Electronics for PET[J]. Nuclear Physics Review, 2010, 27(1): 56-62. doi: 10.11804/NuclPhysRev.27.01.056

A New Design of Online Updatable Lookup table Electronics for PET

doi: 10.11804/NuclPhysRev.27.01.056

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-03-20

Abstract

A new design of lookuptable(LUT) electronics for a small animal positron emission tomography(PET) system is proposed. Position and energy signals for a coincidence event are generated in a coincidence circuit board and sent to the LUT board， in which the centroid of this event is calculated by the LUT approach. The centroid is used as an index of the crystal element. Corresponding coordinates and energy threshold of this crystal are obtained from the other tables， and the scattered events are rejected. Interfaces for receiving respiratory and electrocardiac gate signals are designed for future use. All the lookup tables are stored in NOR flash memory which is controlled by a Complex Programmable Logic Device. The LUT board communicates with PC through Ethernet board. The advantage of this specific hardware design is that the LUT operation can be performed in a more efficient way， with a <100 ns time delay. The paper also describes the operation of the flashmemory with a CPLD， and the data flow between this LUT and other modules in our PET system.
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沈阳化工大学材料科学与工程学院沈阳 110142

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A New Design of Online Updatable Lookup table Electronics for PET

doi: 10.11804/NuclPhysRev.27.01.056

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2010-03-20

Abstract:
A new design of lookuptable(LUT) electronics for a small animal positron emission tomography(PET) system is proposed. Position and energy signals for a coincidence event are generated in a coincidence circuit board and sent to the LUT board， in which the centroid of this event is calculated by the LUT approach. The centroid is used as an index of the crystal element. Corresponding coordinates and energy threshold of this crystal are obtained from the other tables， and the scattered events are rejected. Interfaces for receiving respiratory and electrocardiac gate signals are designed for future use. All the lookup tables are stored in NOR flash memory which is controlled by a Complex Programmable Logic Device. The LUT board communicates with PC through Ethernet board. The advantage of this specific hardware design is that the LUT operation can be performed in a more efficient way， with a <100 ns time delay. The paper also describes the operation of the flashmemory with a CPLD， and the data flow between this LUT and other modules in our PET system.

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