DocumentCode :
3540938
Title :
Scatter detection and correction method of FPD-based DR/CT imaging systems
Author :
Huang, Kuidong ; Zhang, Dinghua ; Li, Mingjun
Author_Institution :
Key Lab. of Contemporary Design & Integrated Manuf. Technol., Minist. of Educ. Northwestern Polytech. Univ., Xi´´an, China
fYear :
2009
fDate :
16-19 Aug. 2009
Abstract :
Aiming at the scatter problem in Flat Panel Detector (FPD)-based Digital Radiography (DR) and Computed Tomography (CT) imaging systems, a scatter detection and correction method based on Beam Attenuation Array (BAA) was proposed. In this method, the BAA is placed between the X-ray source and the detected object, and it is composed of the small ball array and its fixed substrate. The scatter values in the projection centers of the small ball array are calculated by using of the characteristic of a small part of the ray attenuation caused by the BAA, and then the whole scatter image is obtained by using Catmull-Clark subdivision surface approximation method to fit these scatter values. To complete the scatter correction, the final projection image is got by subtracting the corresponding scatter image from the original projection image. The experimental results show that the proposed method is practical and effective to detect and correct the scatter in DR/CT imaging systems.
Keywords :
X-ray imaging; X-ray scattering; computerised tomography; object detection; radiography; CT; Catmull-Clark subdivision surface approximation method; FPD; X-ray source; beam attenuation array; computed tomography; digital radiography; flat panel detector; object detection; ray attenuation; scatter correction method; scatter detection; Attenuation; Computed tomography; Object detection; Optical imaging; Radiography; Sensor arrays; X-ray detection; X-ray detectors; X-ray imaging; X-ray scattering; CT; DR; beam attenuation array; scatter correction; scatter detection;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
Type :
conf
DOI :
10.1109/ICEMI.2009.5274066
Filename :
5274066
Link To Document :
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