| Japanese |
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| Title | ハイブリッド型エミッションCT装置HEADTOMEとその臨床応用 |
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| Subtitle | 原著 |
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| Authors | 菅野巖*, 上村和夫*, 三浦修一*, 三浦佑子*, 高橋昭喜*, 河田泰*, 広瀬佳治**, 古賀健一郎**, 服部博幸** |
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| Organization | *秋田県立脳血管研究センター放射線科, **島津製作所医用事業部 |
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| Journal | 核医学 |
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| Volume | 18 |
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| Number | 1 |
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| Page | 49-61 |
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| Year/Month | 1981/1 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」シングルホトンおよびポジトロン両トレーサの測定が行なえる初のハイブリッド型エミッションCT, HEADTOME装置を開発した. 本装置は頭部専用であり64個のNaI検出器を直径42 cmのリング状に配列しその内側にシングルホトン測定用とポジトロン測定用各々のコリメータシステムを有する. シングルホトンコリメータは64枚のタングステン板が同期して振角運動する独自の方式をとり高感度のままに高分解能の性能を示した. ポジトロン測定にはリング回転とゆすり運動を併用した. 各々の分解能は高分解能モードでシングルホトンが8mm, ポジトロンが11mmの半値幅を得た. 感度は99mTcが20 mmスライスコリメータに対して21kcps, 68Gaが20 mmスライスマスクに対して20kcps/ (μCi/ml 20 cmφ円筒) を示した. 本装置を用いて81mKr平衡映像法, 133Xe脳クリアランス法による脳血流量測定, 99mTcO4-や68Ga-EDTAによる脳血液関門検査等の臨床測定が実施され優れた性能が確認された. |
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| Practice | 臨床医学：一般 |
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| Keywords | Emission computed tomograph, Circular ring detector, Moving fin collimator, Physiological tomograph, Cerebral blood flow. |
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| English |
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| Title | Hybrid Emission Computed Tomograph for Brain Study and Its Clinical Applications |
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| Authors | Iwao KANNO*, Kazuo UEMURA*, Shuichi MIURA*, Yuko MIURA*, Shoki TAKAHASHI*, Yasushi KAWATA*, Yoshiharu HIROSE**, Ken-ichiro KOGA**, Hiroyuki HATTORI** |
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| Authors(kana) | |
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| Organization | *Division of Radiology. Research Institute of Brain and Blood Vessels, **R/D Engineering Department Medical Systems Division, Shimadzu Seisakusho LTD. |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 18 |
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| Number | 1 |
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| Page | 49-61 |
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| Year/Month | 1981/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] A hybrid emission computed tomograph for single photon and positron has been designed and developed. The system employs 64 NaI detectors on 42 cm diam circular ring and two collimator units which sliding inside the ring for each single photon and positron detection. The single photon collimator consists of 64 sets of tungsten fins synchronously swinging back and forth, and gave high resolution at the minimum cost of sensitivity. In positron detection the ring rotation and wobbling are employed to get a fine linear sampling. The system as single photon CT and as positron CT both has shown excellent performances. The image resolutions obtained at the highest resolution scan were 8 and 11 mm FWHM for 99mTc and 68Ga, respectively, and system sensitivities with 20 mm slice spacing 21 and 20 kcps/ (μCi/ml of 20 cm diam cylinder) for each. The system is now under clinical use in cerebral blood flow studies by 81mKr equilibrium imaging and 133Xe clearance techniques and in a conventional blood brain barrier study by 99mTcO4- or 68Ga-EDTA, and has shown many fruitful results. |
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| Practice | Clinical medicine |
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| Keywords | Emission computed tomograph, Circular ring detector, Moving fin collimator, Physiological tomograph, Cerebral blood flow. |
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