Abstract
In radioisotope examination, positron emission tomography (PET) spreads rapidly to help early detection of cancer. Our medical center introduced a positron emission tomography-computed tomography (PET-CT) device in October 2006. It is the device that PET was united with CT. PET-CT generates three kinds of images. (CT image, PET image and fusion image.) Therefore PET-CT has had a new problem by an electronic storage to picture archiving and communication system (PACS). We examined a problem of PET-CT from digital imaging and communications in medicine (DICOM) modality worklist management (MWM) information and tag information of PET-CT images. In addition, we analyzed operation methods for a problem. Three kinds of images made by PET-CT were classified into CT, PT and OT from tag information. These images were stored in one examination order (Accession Number) of PACS. Therefore we have the problem that a modality classification of PACS varies with a transfer sequence of PET-CT images. We have solved a problem by unifying image transfer sequence to PACS and saved all PET-CT images in a modality classification of PT.
