Title :
Truncation reduction in fan-beam transmission scanning using the Radon transform consistency conditions
Author :
Erlandsson, K. ; Visvikis, D. ; Waddington, W.A. ; Jarritt, P.
Author_Institution :
Inst. of Nucl. Med., Middlesex Hosp., London, UK
Abstract :
Transmission scanning is needed for accurate attenuation correction in cardiac Single Photon Emission Tomography (SPET). Simultaneous emission and transmission imaging can be done using a scintillation camera with a fan-beam collimator and a line source at the focal point. The transmission data will be truncated, however, which may lead to inaccuracy in the reconstructed emission values. The authors have developed two different methods for augmentation of truncated transmission data, based on the Radon transform consistency conditions. Their results show that the uniformity in the myocardium can be improved with these methods, as compared to using the truncated data directly in the reconstruction
Keywords :
cardiology; image reconstruction; medical image processing; single photon emission computed tomography; Radon transform consistency conditions; accurate attenuation correction; cardiac single photon emission tomography; fan-beam collimator; fan-beam transmission scanning; focal point; line source; medical diagnostic imaging; myocardium uniformity; nuclear medicine; scintillation camera; simultaneous emission/transmission imaging; truncated transmission data; truncation reduction; Attenuation; Biomedical imaging; Cameras; Collimators; Educational institutions; Hospitals; Image reconstruction; Integral equations; Nuclear medicine; Single photon emission computed tomography;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.845824
