QUANTITATIVE SPECT BY ATTENUATION CORRECTION OF THE PROJECTION SET USING TRANSMISSION DATA - EVALUATION OF A METHOD

被引：22

作者：

ALMQUIST, H

PALMER, J

LJUNGBERG, M

WOLLMER, P

STRAND, SE

JONSON, B

机构：

[1] UNIV LUND, DEPT CLIN PHYSIOL, S-22185 LUND, SWEDEN

[2] UNIV LUND, DEPT RADIAT PHYS, S-22185 LUND, SWEDEN

来源：

EUROPEAN JOURNAL OF NUCLEAR MEDICINE | 1990年 / 16卷 / 8-10期

关键词：

Attenuation correction; Build-up; Quantitative SPECT; Transmission measurement;

D O I：

10.1007/BF00998154

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A method for measuring attenuation coefficients in single-photon emission tomography (SPECT) is described and evaluated, together with a method for attenuation correction using these measured attenuation coefficients. Build-up, caused by scattered photons, is corrected for by a simple substitution in the algorithms. Transmission studies are performed with a99mTc- or57Co flood source, and emission phantom studies with99mTc line sources. The method is evaluated with variable but well-defined phantoms. The result is accurate attenuation coefficients for different densities, dimensions and geometries, and an accuracy of corrected emission activities of better than ∓ 10% in most cases. The present limitations of the method for attenuation correction are discussed. © 1990 Springer-Verlag.

引用

页码：587 / 594

页数：8