Title :
Iteration algorithm to correct absorption in PET
Author :
Pickalov, V.V. ; Likhachov, A.V.
Author_Institution :
Inst. of Theor. & Appl. Mech., Acad. of Sci., Novosibirsk, Russia
Abstract :
One of the difficulties of PET is an attenuation of emission projection data. A new approach to the problem is suggested. The idea is that the measurements have to be interrelated as soon as they refer to one object. Whole projection data are considered as an invariant function of the operator PR-1, R-1 is an algorithm solving the emission tomography problem, P is a projecting operator. An iterative algorithm restoring the emission projection data was developed. Numerical simulations were carried out
Keywords :
image reconstruction; inverse problems; iterative methods; medical image processing; positron emission tomography; 3D problem; absorption correction; emission projection data attenuation; invariant function; inversion problem; iteration algorithm; positron emission tomography; ray tomography approximation; whole projection data; Absorption; Attenuation; Detectors; Geometry; Iterative algorithms; Object detection; Plasma diagnostics; Plasma measurements; Positron emission tomography; Transmission line matrix methods;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.845807
