DocumentCode :
1455022
Title :
Iteration algorithm to correct absorption in PET
Author :
Pickalov, V.V. ; Likhachov, A.V.
Author_Institution :
Inst. of Theor. & Appl. Mech., Novosibirsk, Russia
Volume :
48
Issue :
1
fYear :
2001
fDate :
2/1/2001 12:00:00 AM
Firstpage :
82
Lastpage :
88
Abstract :
One of the difficulties arising in PET is attenuation of emission projection data. The most difficult situation arises in the cases in which no information as to the distribution of the absorption coefficient is available. It is this case that is considered in the present paper. A new approach to the problem is proposed. Its main idea consists in that the measurement data, as soon as they all belong to one object, are bound to be self-consistent. The whole set of projection data is considered as an invariant function of the operator PR-1, where R-1 is an algorithm solving the emission tomography problem and P is the projecting operator. An iteration algorithm that permits reconstruction of emission projection data is developed. Numerical simulations are carried out
Keywords :
gamma-ray absorption; iterative methods; medical image processing; positron emission tomography; PET absorption correction; absorption coefficient distribution; emission projection data reconstruction; medical diagnostic imaging; nuclear medicine; numerical simulations; projection data; projection data set; Absorption; Attenuation; Equations; Humans; Medical diagnosis; Numerical simulation; Plasma applications; Plasma diagnostics; Positron emission tomography; Single photon emission computed tomography;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/23.910836
Filename :
910836
Link To Document :
بازگشت