Usefulness of the Chang attenuation correction method with use of a CT-based μ map by FBP reconstruction in 201 Tl SPECT-MPI

Objective Attenuation correction (AC) on nuclear images of non-uniform domains is generally performed by a change of the computed tomography (CT) values to μ values, which are then inserted as components into the detection probability of iterative reconstruction techniques (OS-EM Iterative AC). We established an AC technique which uses a CT μ map based on the Chang AC. Our purpose in this study was to confirm the appropriateness of the Chang AC with the OS-EM and the FBP method (OS-EM Chang AC and FBP Chang AC) by evaluating the results obtained in a phantom and clinical study for 201Tl single-photon emission-computed tomography-myocardial perfusion imaging (SPECT-MPI).