Title :
Derivation of Scatter Kernel in CBCT Imaging System
Author :
Li, Heng ; Mohan, Radhe ; Zhu, X. Ronald
Author_Institution :
Dept. of Radiat. Phys., Univ. of Texas M. D. Anderson Cancer Center, Houston, TX
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
An edge spread function method has been developed to determine the scatter kernel in kilo-voltage (kV) cone beam computed tomographic (CBCT) imaging system. We modeled the scatter as a depth dependent convolution kernel, and the kernel was derived for different object thickness up to 41 cm from measured data without assuming any empirical trial function for a Varian Trilogy CBCT system. The derived kernel can then be used for correcting the projection data, or incorporated in the reconstruction process.
Keywords :
computerised tomography; image reconstruction; CBCT imaging system; Varian Trilogy CBCT system; depth dependent convolution kernel; edge spread function method; kilo-voltage cone beam computed tomographic imaging; reconstruction process; scatter kernel derivation; Convolution; Deconvolution; Detectors; Electromagnetic scattering; Image quality; Image reconstruction; Kernel; Particle scattering; Thickness measurement; X-ray scattering;
Conference_Titel :
Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
1-4244-0784-2
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2006.355082
