DocumentCode :
3532351
Title :
Adaptive beam hardening correction based on projection data consistency condition
Author :
Tang, Shaojie ; Mou, Xuanqin ; Xu, Qiong ; Zhang, Yanbo ; Yu, Hengyong
Author_Institution :
Inst. of Image Process. & Pattern Recognition, Xi´´an Jiaotong Univ., Xi´´an, China
fYear :
2010
fDate :
Oct. 30 2010-Nov. 6 2010
Firstpage :
2325
Lastpage :
2329
Abstract :
In the medical diagnostic computed tomography (CT) systems, the x-ray tube usually emits photons with a polychromatic spectrum, resulting in beam hardening artifacts in the reconstructed images. Although the bone correction method is extensively used to compensate for the beam hardening artifacts, its performance crucially depends on the empirical choice of a scaling factor. To overcome this shortcoming, here we propose two adaptive correction methods, which utilize the Helgasson-Ludwig (H-L) consistency condition to determine the optimal scaling factor and the corresponding coefficient vector. Our numerical simulation results demonstrate the effectiveness of the proposed methods.
Keywords :
computerised tomography; image reconstruction; medical image processing; Helgasson-Ludwig consistency; X-ray tube; adaptive beam hardening correction; adaptive correction methods; bone correction method; image reconstruction; medical diagnostic computed tomography; polychromatic spectrum; projection data consistency condition; scaling factor; Biomedical imaging; Bones; Computed tomography; Detectors; Image reconstruction; X-ray imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2010 IEEE
Conference_Location :
Knoxville, TN
ISSN :
1095-7863
Print_ISBN :
978-1-4244-9106-3
Type :
conf
DOI :
10.1109/NSSMIC.2010.5874199
Filename :
5874199
Link To Document :
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