Japanese
Titleレーザーイメージャを利用した512×2048マトリックス全身スキャン像について
Subtitle技術報告
Authors足立至*, 杉岡靖*, 雑賀良典*, 難波隆一郎*, 中田和伸*, 辰吉光*, 西垣洋*, 平石久美子*, 宇都宮啓太*, 末吉公三*, 楢林勇*, 二沢佳史**
Authors(kana)
Organization*大阪医科大学放射線医学教室, **東芝メディカル
Journal核医学
Volume30
Number7
Page799-806
Year/Month1993/7
Article報告
Publisher日本核医学会
Abstract「要旨」デジタルガンマカメラでは全身スキャン像を512×2048マトリックス収集も可能であるがその利用は十分とは言えない. 今回レーザーイメージャを使用して512×2048マトリックス収集された全身スキャン像の分割表示を試み, 従来の256×1024マトリックス表示された全身スキャン像とバーファントムテスト, 骨シンチグラフィで多発陽性像を認めた39例で対比検討した. その結果レーザーイメージャの縦方向イメージ間距離を0ドットにすることで上半身, 下半身をほとんど境界なく, 安定して表示することができた. 512×2048全身スキャン像ではより精細な画像観察ができたが, 256×1024全身スキャン像においても多発陽性像の描出は同等であった. 本方法でデジタルガンマカメラでは最も精細な画像表示が日常の検査に負担をかけずに簡単に施行することができ, またCRT system等を変更することがないので, 今後レーザーイメージャの普及とともにさらに発展していくものと考えられる.
Practice臨床医学：一般
KeywordsWhole body scintigraphy, Bone scintigraphy, 99mTc-HMDP, Laser imaging system.
English
Title512×2048 Matrix Whole Body Scintigraphy with Laser Imaging System
Subtitle
AuthorsItaru ADACHI*, Yasushi SUGIOKA*, Yoshinori SAIGA*, Ryuuichirou NAMBA*, Kazunobu NAKATA*, Yoshimitsu TATSU*, Hiroshi NISHIGAKI*, Kumiko HIRAISHI*, Keita UTSUNOMIYA*, Kouzou SUEYOSHI*, Isamu NARABAYASHI*, Yoshifumi NISAWA**
Authors(kana)
Organization*Department of Radiology, Osaka Medical College, **Toshiba Medical Inc.
JournalThe Japanese Journal of nuclear medicine
Volume30
Number7
Page799-806
Year/Month1993/7
ArticleReport
PublisherTHE JAPANESE SOCIETY OF NUCLEAR MEDICINE
Abstract[Summary]Although we could acquire a detailed 512×2048 matrix whole body scintigraphy, the 512×2048 matrix whole body scintigraphy was divided to the upper and lower half of the body, because a many of CRT system displayed only 1024×1024 matrix with non interlace mode. We made 12 dots of normal vertical image distance to 0 dot with laser imaging system (Li-10 Konica medical inc. ), and we printed these divided whole body images in the four partition of the film. The lead bar phantom (interval from 6 mm to 3 mm) filled with 99mTcO4- was studied by both 512×2048 matrix whole body scanning mode and 256×1024 whole body scanning mode in the basic study. And the distance between the lead bar phantom and the gamma camera was changed from 10 mm to 100 mm. We studied 41 patients with metastatic bone tumor (14 breast cancer, 7 lung cancer, 7 prostate cancer, 5 others, 6 unknown origin) clinically. However the 512×2048 matrix whole body scan was better quality of images than 256×1024 matrix whole body scan at 100 mm distance in the basic study. The abnormal uptake of metastatic sites was shown equally in both 512×2048 and 256×1024 matrix whole body scintigraphy. The 512×2048 matrix whole body scan was better quality of images than 256×1024 matrix whole body scan in 26 out of 41 patients, equal in 10 out of 41 patients and worse in 3 out of 41 patients. The matrix size of 512×2048 matrix whole body scintigraphy (0.98 mm2) was smaller than that of 256×1024 matrix whole body scintigraphy (1.95 mm2). The spatial resolution of the 512×2048 matrix whole body scintigraphy was higher than that of 256×1024 matrix whole body scintigraphy, but the density resolution was worse, because the counts per matrix of 512×2048 matrix whole body scintigraphy were less than that of 256×1024 matrix whole body scintigraphy. The joint between the upper and lower half of the body was not conspicuous using laser imaging system in clinical examination. This method did not need a new CRT system therefore we could obtain a detailed 512×2048 matrix whole body scintigraphy at a small cost. We can conclude that the 512×2048 matrix whole body scintigraphy could be obtained in our usual examination, the quality of these images was better than that of 256×1024 matrix whole body scintigraphy.
PracticeClinical medicine
KeywordsWhole body scintigraphy, Bone scintigraphy, 99mTc-HMDP, Laser imaging system.

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