Uniformity Calibration for ICT Image

ZENG Gang; LIU Li; QUE Jie-Min; ZHANG Ying-Ping; YIN Yin; WANG Yan-Fang; YU Zhong-Qiang; YAN Yong-Lian

Chinese Physics C> 2004, Vol. 28> Issue(10) : 1131-1134

Uniformity Calibration for ICT Image

Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100039,China

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Abstract：
The uniformity of ICT image is impaired by beam hardening and the inconsistency of detector units responses. This paper analyzes the beam hardening and the nonlinearity of the detector's output. The correction factors are determined experimentally by the detector's responses with different absorption length. The artifacts in the CT image of a symmetrical aluminium cylinder have been eliminated after calibration.

References

[1]

. Herman G T. Image Reconstruction From Projections: The Fundamentals of Computerized Tomography[M]. Beijing: Science Press, 1985: 25—38(in Chinese)(赫尔曼G T. 由投影重建图像—CT 的理论基础[M]. 北京: 科学出版社, 1985, 25—38)2. WANG Xue-Li . CT Theory and Applications, 2003, 12 (3): 46—52 (in Chinese)(王学礼. CT理论与应用研究. 2003, 12 (3): 46—52)3. Chye Hwang Yan et al. IEEE Transactions on Medical Imaging, 2000, 19(1): 1

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ZENG Gang, LIU Li, QUE Jie-Min, ZHANG Ying-Ping, YIN Yin, WANG Yan-Fang, YU Zhong-Qiang and YAN Yong-Lian. Uniformity Calibration for ICT Image[J]. Chinese Physics C, 2004, 28(10): 1131-1134.

ZENG Gang, LIU Li, QUE Jie-Min, ZHANG Ying-Ping, YIN Yin, WANG Yan-Fang, YU Zhong-Qiang and YAN Yong-Lian. Uniformity Calibration for ICT Image[J]. Chinese Physics C, 2004, 28(10): 1131-1134. shu

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Received: 2004-03-18
Revised: 1900-01-01

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