Investigation of the relationship between linear attenuation coefficients and CT Hounsfield units using radionuclides for SPECT.
This study has investigated the relationship between linear attenuation coefficients (mu) and Hounsfield units (HUs) for six materials covering the range of values found clinically. Narrow-beam mu values were measured by performing radionuclide transmission scans using (99m)Tc, (123)I, (131)I, (201)Tl and (111)In. The mu values were compared to published data. The relationships between mu and HU were determined. These relationships can be used to convert computed tomography (CT) images to mu-maps for single photon emission computed tomography (SPECT) attenuation correction.
Brown
Saxby
S
Institute of Medical Physics, School of Physics, University of Sydney, NSW 2006, Australia. sbrown@physics.usyd.edu.au
Bailey
Dale L
DL
Willowson
Kathy
K
Baldock
Clive
C
D019047:Phantoms, Imaging; D010938:Plant Oils; D019904:Polymethyl Methacrylate; D011874:Radiometry / Q000379:methods*; D019275:Radiopharmaceuticals; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D014867:Water; D014934:Wood
D010938:Plant Oils; D019275:Radiopharmaceuticals; D014867:Water; D019904:Polymethyl Methacrylate