Design of a γ-Ray Imaging System for Plant Studies

LIU Hua-Feng; BAO Chao

Chinese Physics C> 2002, Vol. 26> Issue(2) : 192-196

Design of a γ-Ray Imaging System for Plant Studies

LIU Hua-Feng ^, ,
BAO Chao

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

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Abstract：
To take advantages of positron emission tomography(PET) in studies of physiological functions of plants,a γ-ray imaging system composed of two block detectors facing each other is under developing. The block detector consists of 10×10 lutetium oxyorthosilicate(LSO) crystals and a position sensitive photomultiplier tube(PSPMT),Hamamatsu R5900 C12,where the element size of the LSO is 1.8mm×1.8mm×10mm. The performance of LSO detector was evaluated in terms of applicability to PET. All the detector elements are clearly visualized in the position map. Energy resolution ranges from 14.5% to 22% FWHM at 511keV. Coincidence timing resolution is improved as the supply voltage of the PSPMT is increased. These measurements indicate that the LSO detector is applicable for high resolution dual block detector imaging system.

References

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. McKay R M, Palmer G P, MA X P et al. Plant Cell and Environment, 1988, 11: 8512. Kronzucker H J, Siddiqi M Y, Glass A D M. Nature, 1997, 385: 59 3. Nakanishi H, Bughop N, Matsuhashi S et al. Journal of Experimental Botany, 1999, 50: 637 4. Ishioka N S, Matsyoka H, Watanabe S et al. Journal of Radio analytical and Nuclear Chemistry, 1999, 239: 417 5. Kume T, Matsuhashi S Shimazu M et al. Appl. Radiat. Isot., 1997, 48: 1035 6. Van E C. Nucl. Instrum Methods, 1997, A392: 2857. ZHU R Y. IEEE Trans Nucl. Sci., 1997, 44: 468 8. Lecomte R, Pepin C, Rouleau D et al. IEEE Trans Nucl. Sci., 1998, 45: 478

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LIU Hua-Feng and BAO Chao. Design of a γ-Ray Imaging System for Plant Studies[J]. Chinese Physics C, 2002, 26(2): 192-196.

LIU Hua-Feng and BAO Chao. Design of a γ-Ray Imaging System for Plant Studies[J]. Chinese Physics C, 2002, 26(2): 192-196. shu

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Received: 2001-04-13
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

Design of a γ-Ray Imaging System for Plant Studies

LIU Hua-Feng ^,
BAO Chao

Corresponding author: LIU Hua-Feng,

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

Received Date: 2001-04-13
Accepted Date: 1900-01-01
Available Online: 2002-02-05

Abstract: To take advantages of positron emission tomography(PET) in studies of physiological functions of plants,a γ-ray imaging system composed of two block detectors facing each other is under developing. The block detector consists of 10×10 lutetium oxyorthosilicate(LSO) crystals and a position sensitive photomultiplier tube(PSPMT),Hamamatsu R5900 C12,where the element size of the LSO is 1.8mm×1.8mm×10mm. The performance of LSO detector was evaluated in terms of applicability to PET. All the detector elements are clearly visualized in the position map. Energy resolution ranges from 14.5% to 22% FWHM at 511keV. Coincidence timing resolution is improved as the supply voltage of the PSPMT is increased. These measurements indicate that the LSO detector is applicable for high resolution dual block detector imaging system.