caa a22 4500 465786332 CHVBK 20180323112010.0 cr unu---uuuuu 170327e19900801xx s 000 0 eng 10.1007/BF00998154 doi (NATIONALLICENCE)springer-10.1007/BF00998154 Quantitative SPECT by attenuation correction of the projection set using transmission data: evaluation of a method [Elektronische Daten] [Helén Almquist, John Palmer, Michael Ljungberg, Per Wollmer, Sven-Erik Strand, Björn Jonson] 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. Springer-Verlag, 1990 Attenuation correction nationallicence Build-up nationallicence Quantitative SPECT nationallicence Transmission measurement nationallicence Almquist Helén Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut Palmer John Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut Ljungberg Michael Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut Wollmer Per Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut Strand Sven-Erik Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut Jonson Björn Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut European Journal of Nuclear Medicine Springer-Verlag 16/8-10(1990-08-01), 587-594 0340-6997 16:8-10<587 1990 16 259 https://doi.org/10.1007/BF00998154 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00998154 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Almquist Helén Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 700 1- Palmer John Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 700 1- Ljungberg Michael Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 700 1- Wollmer Per Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 700 1- Strand Sven-Erik Department of Radiation Physics, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 700 1- Jonson Björn Department of Clinical Physiology, University of Lund, S-22185, Lund, Sweden aut NATIONALLICENCE 773 0- European Journal of Nuclear Medicine Springer-Verlag 16/8-10(1990-08-01), 587-594 0340-6997 16:8-10<587 1990 16 259 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer