@article{oai:junshin.repo.nii.ac.jp:00000063,
 author = {Kawamura, Seiji and Matsutake, Yuuki and Hashimoto, Takeyuki and Ikematsu , Ryuji and Kawaji, Yasuyuki and Ideguchi, Tadamitsu and Fukushima, Shigehiro and Hayabuchi, Naohumi and Kawamura, Seiji and Matsutake, Yuuki and Hashimoto, Takeyuki and Ikematsu , Ryuji and Kawaji, Yasuyuki and Ideguchi, Tadamitsu and Fukushima, Shigehiro and Hayabuchi, Naohumi},
 issue = {1},
 journal = {純真学園大学雑誌, Journal of Junshin Gakuen University,Faculty of  Health Sciences},
 month = {Mar},
 note = {application/pdf, Abstract : The OSEM that is a successive, approximate-image reconstruction method has been extensively used for the image reconstruction of SPECT and PET.  The OSEM method has very recently been introduced in the image reconstruction of CT, and its clinical application has begun.  As the advantage of  the OSEM method, reduction of  streak artifacts from a high density area and easiness to build attenuation correction, scatter correction, etc. into reconstructive soft-wares have been mentioned.  Many studies on the number of subsets and iterations, etc. in the clinical use of OSEM method have been made up to date, but the studies on the use order of subsets have been scarcely made.  Thus, we made a study on the use order of subsets by changing the number of subsets and the use order of subsets of the Shepp phantom images as our study’s subject images.  We conducted the comparative examination of Shepp phantom images that were reconstructed under a different condition from the original images of Shepp phantom by using visual NMSE method, profile curves, contrast, etc.  As a result, it was thought that, for the use order of subsets, it may be recommendable to construct a subset per each projected data at the greatest elongation.},
 pages = {049--055},
 year = {2012}
}