X-ray beam hardening correction based on polynomial fitting in local scanning

Chen Hao; Chen Yunbin; Li Shoutao

doi:10.11884/HPLPB201527.114001

Volume 27 Issue 11

Nov. 2015

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Article Navigation > High Power Laser and Particle Beams > 2015 > 27(11): 114001

Zhang Manzhou, Wang Kun, Zhang Qinglei, et al. Compensations of double elliptical polarization undulator effects on the SSRF storage ring[J]. High Power Laser and Particle Beams, 2017, 29: 075103. doi: 10.11884/HPLPB201729.170014

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Chen Hao, Chen Yunbin, Li Shoutao. X-ray beam hardening correction based on polynomial fitting in local scanning[J]. High Power Laser and Particle Beams, 2015, 27: 114001. doi: 10.11884/HPLPB201527.114001

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X-ray beam hardening correction based on polynomial fitting in local scanning

doi: 10.11884/HPLPB201527.114001

1.
Institute of Applied Electronics,CAEP,P.O.Box 919-1014,Mianyang 621900,China;
2.
National X-ray Digital Imaging Instrument Center,Mianyang 621000,China

Received Date: 2015-05-15
Rev Recd Date: 2015-07-24
Publish Date: 2015-10-27

Abstract

Abstract

Beam hardening effect would be induced due to wide energy spectrum of X-ray. One efficient beam hardening correction method is building a mathematical law between poly energetic projection and intersection length, which can be calculated by forward projection in reconstructed images domain. However, for local scanning, the intersection length obtained by forward projection is no longer equal to the real distance at which X-ray passes through the object, and the data of mathematical fit are not valid. Hence, a cylindrical phantom is used. Utilizing the geometrical character of cylinder, the true distance X-ray passing through the object is calculated analytically. Experimental result shows that beam hardening artifacts are suppressed by our approach.
- beam hardening correction,
- local scanning,
- polynomial fit,
- forward projection

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