Authors: Mana Yoshimura Naoto Kanesaka Kazuhiro Saito Kiyoshi Koizumi Koichi Tokuuye Hiroshi Goto
Publish Date: 2011/03/13
Volume: 55, Issue: 2, Pages: 148-154
Abstract
Fiftytwo patients were examined Twentynine patients had malignant melanoma group A three were clinically diagnosed with metastatic choroidal tumor and 20 patients were given either histological or clinical diagnoses of either benign pigmented lesion or tumor group B Early and delayed I123 IMP images were obtained and standardized by Neurostat software Using fusion software we applied a threedimensional region of interest 3DROI template to the standardized I123 IMP and calculated the retention index and tumortonontumor T/N ratio of the delayed phase using the maximum count for each ROISensitivity at the retention index cutoff of 30 was 824 specificity was 852 and accuracy was 836 Sensitivity at the T/N ratio of the delayed phase cutoff of 13 was 912 specificity was 778 and accuracy was 852 The positive predictive value of the T/N ratio was better than that of the retention index The negative predictive value of the retention index was better than that of the T/N ratio
Keywords: