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Michael Ljungberg

Michael Ljungberg

Professor

Michael Ljungberg

Quantitative SPECT by attenuation correction of the projection set using transmission data: evaluation of a method

Författare

  • Helén Almquist
  • John Palmer
  • Michael Ljungberg
  • Per Wollmer
  • Sven-Erik Strand
  • Björn Jonson

Summary, in English

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 a 99mTc- or 57Co flood source, and emission phantom studies with 99mTc 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.

Avdelning/ar

  • Medicinsk strålningsfysik, Lund
  • Klinisk fysiologi, Malmö
  • Klinisk fysiologi, Lund

Publiceringsår

1990

Språk

Engelska

Sidor

587-594

Publikation/Tidskrift/Serie

European Journal Of Nuclear Medicine

Volym

16

Issue

8-10

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Radiology, Nuclear Medicine and Medical Imaging

Nyckelord

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

Status

Published

Forskningsgrupp

  • Clinical Physiology, Malmö

ISBN/ISSN/Övrigt

  • ISSN: 1432-105X