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Emission computed tomography (ECT), which provides us with the three-dimensional distribution of radioisotope in the body, was performed in 30 cases of ovarian tumor suspected of being malignant from the ultrasonography examination.The patients subsequently underwent surgery and diagnosis was carried out by a pathologist. The tumor images detected by Ga-67-cornputed scintigraphy (Ga-67-CS) and ECT were compared according to the postoperative diagnosis.The results obtained revealed that ECT not only contributes to improvement of diagnosis (ECT allowed the differentiation between benignancy and malignancy in 86.7% of the cases) but also provides considerable reliable information of the tumor shape, which could not be obtained by conventional Ga-67-CS.The horizontal section obtained by ECT conformed especially well to ultrasonogram (USG) and X-ray computed tomogram (X-CT). The solid region and the cystic region in the USG and X-CT well corresponded with the hot spot lesion and the cold area in the ECT, respectively.Comparison of the images by USG, X-CT and ECT on the same plane can best be achieved from horizontal sections at present, which we believe will help further improvement of diagnosis and gain a leading role in the diagnosis of pelvic tumor in the future.
近畿産科婦人科学会の論文