Japanese
Title回転椅子方式による肝の横断シンチグラフィーについて
Subtitle原著
Authors小山田日吉丸*, 福喜多博義*, 照井頌二*, 上原敏敬*, 川合英夫*
Authors(kana)
Organization*国立がんセンター放射線診断部RI診断
Journal核医学
Volume18
Number1
Page63-73
Year/Month1981/1
Article原著
Publisher日本核医学会
Abstract「要旨」 われわれは通常のシンチカメラと独自に開発した回転椅子およびコンピュータを用いて肝の横断シンチグラフィー (RCT) をとることを試みた. 対象は肝内に占拠性病変の存在が疑われた37例で, 用いたRIは99mTc-phytate 8 mCiである. RCT像を画質の面からgood, fair, poorに分けると, それぞれ21例, 12例, 4例となった. RCT像上に描出された最小の結節は, medial segmentの背面寄りにあった肝の血管腫で, 切除標本上のサイズは2.5×1.8cmであった. これは, 通常の6方向シンチグラム上には描出し得なかった. RCT像上に欠損像を認め, それら欠損像に対する裏付けが手術, XCT, Echo, シンチグラムなどで得られた症例は21例あった. 一方, 病巣の存在が確認されているのにRCTで描出し得なかったのは3例あった. RCT専用器の普及により更に検出効率が改善されるものと思われる,
Practice臨床医学：一般
KeywordsRadionuclide Computed Tomography (RCT) , Rotating chair, Liver, Single Photon RCT
English
TitleRadionuclide Computed Tomography (RCT) of the Liver Using a Rotating Chair
Subtitle
AuthorsHiyoshimaru OYAMADA, Hiroyoshi FUKUKITA, Shoji TERUI, Toshitaka UEHARA, Hideo KAWAI
Authors(kana)
OrganizationRadioisotope Section, Department of Diagnostic Radiology, National Cancer Center
JournalThe Japanese Journal of nuclear medicine
Volume18
Number1
Page63-73
Year/Month1981/1
ArticleOriginal article
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
Abstract[Summary] Radionuclide Computed Tomography (RCT) of the liver was performed on 37 cases which were suspected to have intrahepatic masses. In this study, a scintillation camera (Ohio Nuclear Σ410S) and a rotating chair designed by one of us were used. The computer used was Scintipac 1200 (36KW memories and 2.4 MB×2 disk memories) . The chair was rotated manually 10 degrees, and finally 36 digital images in the form of 64×64 elements were obtained, covering an entire circumference. "Geometrical mean on the data from the two opposing directions" and "filtered back projection" were used for the reconstruction of the RCT images. The image quality was found to be good in 21 cases, fair in 12 and poor in 4. There were 21 cases on which RCT successfully depicted intrahepatic masses which were known to be present. The smallest nodule depicted on the RCT image was 2.5×1.8 cm on the surgical specimen, which was located in the posterior side of the medial segment and was not shown on the ordinary scintigram. There were 3 cases on which RCT failed to depict intrahepatic masses. The first one had amass in the diaphragmatic surface of the lateral segment, measuring 5.7×4.5×3.7 cm on the surgical specimen. The second had mass in the hepatic dome, which measured 5.5×3.7 cm on the X-ray CT image and was interpreted as being possible direct invasion from the extrahepatic metastasis. The last one had a mass in the posterior segment, measuring 3×3 cm on the echogram. Considering that our method is a temporary expedient, the data seems to be fairly good at present. Therefore, better results could be expected from the machines made exclusively for RCT in the near future.
PracticeClinical medicine
KeywordsRadionuclide Computed Tomography (RCT) , Rotating chair, Liver, Single Photon RCT

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