| Japanese |
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| Title | シンチレーション・カメラ - 電子計算機システムにおける分解時間とその補正法 I. カメラと計算機システムの分解時間 |
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| Subtitle | 原著 |
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| Authors | 福久健二郎*, 飯沼武**, 松本徹** |
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| Organization | *放射線医学総合研究所技術部, **臨床研究部 |
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| Journal | 核医学 |
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| Volume | 11 |
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| Number | 6 |
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| Page | 605-615 |
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| Year/Month | 1974/12 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「1 緒言」近年, ガンマ・カメラと電子計算機を組合わせたシステムを用い, R. I. 動態画像の臨床的応用が盛んになりつつある. このようなシステムで得られる動態像には次の二つの問題がある. それらは (1) カメラ - 計算機システムの総合分解時間による計数落しと, (2) カメラの感度の不均一性による像のひずみである. ここではカメラと計算機システムの分解時間の測定法と計数率特性を表す実験式について論ずる. ガンマ・カメラなどの固定型Rエイメージ装置の分解時間の測定についてはナートフロロスコープに関するR. H. Johns等の報告とアンガー・カメラについてのAdams等の分解時間測定法の相互比較があるが, アンガー型シンチレーション・カメラと計算機システムの総合的な時間応答特性を報告した論文は数少ない. |
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| Practice | 臨床医学：一般 |
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| English |
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| Title | Resolving Time of Scintillation Camera-Computer System and Methods of Correction for Counting Loss I. Mesurement of Resolving Times of a Delay-Line Type Camera and an On-Line Computer System |
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| Subtitle | Original |
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| Authors | Kenjiro FUKUHISA, Takeshi IINUMA, Toru MATSUMOTO |
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| Authors(kana) | |
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| Organization | National Institute of Radiological Sciences |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 11 |
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| Number | 6 |
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| Page | 605-615 |
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| Year/Month | 1974/12 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]In quantitative dynamic studies, a scintillation camera is widely used with an on-line computer system or a data processor of fixed program. However, dynamic data are often inaccurate due to a considerable amount of resolving time inherent in the camera and in the data processing system. We have determined the resolving times of a delay-line type scintillation camera and an on-line computer system (TOSBAC 3400 Model 31 DAC system) separately. Counting-rate characteristics of the camera was measured against varying amount of a radioactive source, and fitted by exponential function by which the resolving time of 5.5μsec was determined. Data scquisition rate of the computer system was investigated in terms of display counting-rate of the camera. An equation of constant deadtime was well fitted to experimental acquisition rate which gave a system resolvingtime of 10μsec. In dynamic image data, the data transfer speed from core memory to magnetic disc was the limiting factor for the highest counting-rate and for the smallest time of each frame. Finally, possibilities are suggested for the improvement in high counting-rate performance of the camera-computer system. |
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| Practice | Clinical medicine |
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