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