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Evaluation of SPECT for sentinel lymph nodes of breast carcinoma fused with 3-dimensional CT

¹ Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan; ² Siemens-Asahi Medical Technologies Ltd., Tokyo, Japan; ³ Department of Radiological Technology, Nagoya University School of Health Sciences, Nagoya, Aichi, Japan

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Objectives: Although anatomical identification of the positive area in sentinel lymph node SPECT is sometimes difficult when SPECT is used alone, it becomes easier when SPECT is fused with 3D-CT. The purpose of this study is to evaluate sentinel lymph node SPECT of breast carcinoma fused with 3D-CT.

Methods: Twenty six patients with breast carcinoma were examined by ^99mTc-phytate SPECT and CT. Image fusion between SPECT and CT volume data was performed using fusion soft on Siemens e.soft workstation. Patients were divided into 3 groups. The first group patients were examined without markers. The second group patients were examined by SPECT and CT with markers on the upper and lower ends of sternum ( 2 markers). The third group patients were examined with markers on the upper and lower ends of sternum and outside of the nipple of opposote side (3 markers). A small vessel containing ^99mTc was used as marker for SPECT and that containing beads of 2mm-diameter for CT.

Results: In the first group patients examined without markers, preparation of the fusion images of SPECT and 3D-CT were difficult. In the second group patients examined with 2 markers, preparation of the fusion images were sometime difficult. In the third group patients examined with 3 markers, the fusion images were easily prepared and the anatomical identification of sentinel lymph node could be easily performed.

Conclusions: The fusion images of SPECT and 3D-CT were easily prepared by placing markers at the upper lower ends of sternum and outside the nipple of opposote side. As a result, anatomical location of sentinel lymph nodes of breast carcinoma could be easily identified.

This Article Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Google Scholar Articles by Kato, K. Articles by Naganawa, S. PubMed Articles by Kato, K. Articles by Naganawa, S.