Attenuation correction is essential for reliable interpretation of SPECT images, however the use of transmission measurements to generate attenuation maps is limited by availability of equipment and potential mismatches between the transmission and emission measurements. A method has been developed to use scatter data measured at the same time as the emission measurements to estimate an attenuation map. The algorithm iterates through a dual estimation process, fixing estimated activity and attenuation respectively. The work presented here improves the accuracy of the previously described scatter model. The possibility of using an ordered subsets technique to accelerate the reconstruction algorithm is considered and the robustness of the reconstruction algorithm to errors in the estimation of higher order scatter is investigated.
|Title of host publication||2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011|
|Number of pages||7|
|Publication status||Published - 2012|
|Event||2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011 - Valencia, Spain|
Duration: 23 Oct 2011 → 29 Oct 2011
|Other||2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011|
|Period||23/10/11 → 29/10/11|