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