Experimental Image of Pinhole Using CdZnTe Detector

Abstract:

The imaging detector of the nuclear radiation is applied widely in radiation detection, the safety monitor and nuclear medical imaging. We aimed to make scientific researches on nuclear radiant source through the pinhole imaging system .The imaging system was designed that base on the Imarad 16×16 pixel-array CdZnTe semiconductor detector. The detector has high sensitivity to low energy under 200kev at room temperature. We applied the detector and pinhole system to obtain the image of the radiant source that the energy was up 200kev.The detection efficiencies of 38.92 mm×38.92 mm by 5 mm thick CdZnTe pixel-array detector were measured. The capability of the whole system was test and evaluated. The rough image of the radiant source was achieved through the test. When the location of the source and pinhole parameter were changed, the image would vary correspondingly. The accurate image could acquired by means of image reconstruction .So it is feasible that the research about the localization and qualification of the nuclear radiation is making use of the pinhole system.

• Periodical: Applied Mechanics and Materials (Volumes 321-324)
• Pages: 935-939
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.321-324.935
• Online since: June 2013
• Authors: Min Shen*
• Keywords: CdZnTe, Image Reconstruction, Nuclear Radiation, Pinhole Imaging System

References

[1] G. F. Knoll, Radiation Detection and Measurement (third edition) [M]. New York, Wiley, 2000.

[2] Li X,ZHU J H, Li X L,et al. Development of Room Temperature CdZnTe Nuclear Radiation Detector[J]. Semiconductor Technology.2008,33(11):941-942

[3] He Z, Li W, Knoll G F, et al. 3-D position sensitive CdZnTe gamma ray spectrometers [J]. Nucl. Instr. and Meth. in Phys. Res., 1999, 422(1-3):173-178.

[4] Chen L H, The theory and experimental research of X ray imaging by coded aperture[D],Dalian: Dalian University of Technology,2005:12-14

[5] Ira Blevis, Member, IEEE, Leonid Tsukerman, LanaVolokh, James Hugg, Senior Member, IEEE ,Floris Jansen, and Jean Paul Bouhnik，CZT Gamma Camera with Pinhole Collimator: Spectral Measurements， 2008 IEEE Nuclear Science Symposium Conference Record

DOI: 10.1109/nssmic.2008.4774346

[6] R.Accorsi, S.D. Metzler, IEEE Trans. Med. Imag., vol. 23, n. 6, pp.750-763, 2004.

[7] C. Fiorini, Member, IEEE, R. Accorsi, G. Lucignani ,Single Pinhole and Coded Aperture Collimation Systems for High-Resolution Gamma-Ray Imaging in Nuclear Medicine: a Comparative Study,2005 IEEE Nuclear Science Conference Record

DOI: 10.1109/nssmic.2005.1596947

[8] Mark F. Smith, Member, IEEE, Ronald J. Jaszczak, Fellow, IEEE, Huili Wang, Member, IEEE, and Jianying Li, SPECT Tumor Imaging: Experimental Measurements and Photon Transport Simulations ,IEEE TRANSACTIONS ON NUCLEAR SCIENCE, VOL. 44, NO. 1, FEBRUARY 1997,81

DOI: 10.1109/23.554828

[9] Frans van der Have, Student Member, IEEE, and Freek J. Beekman, Senior Member, IEEE Penetration and Scatter in Channel Micro-pinholes for SPECT: a Monte Carlo Investigation，IEEE Transactions on Nuclear Science, v 53, n 5, pp.2635-2645, October (2006)

DOI: 10.1109/tns.2006.882739

[10] Y. Nemirovsky et al., Recent progress in n-type CdZnTe arrays for gamma-ray spectroscopy, NIM A, V. 458 1-2, p.325, (2001)

[11] Seng Peng Mok, Student Member, IEEE, Yuchuan Wang, and Benjamin M. W Tsui, Fellow, IEEE, Design of a Novel Pinhole Collimator System for SPECT Imaging of Small Animals with Different Sizes, 2005 IEEE Nuclear Science Symposium Conference Record,2649-2650

DOI: 10.1109/nssmic.2005.1596882

[12] G. Bal, G. L. Zeng, Senior Member, IEEE, R. M. Lewitt, Z. Cao, and P. D. Acton，Study of different pinhole configurations for small animal tumor imaging ，IEEE Nuclear Science Symposium Conference Record, 2004, v5, pp.3133-3137

DOI: 10.1109/nssmic.2004.1466345