| Japanese |
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| Title | 静止測定型全身用高分解能PET装置HEADTOME IVの基本設計と初期性能 |
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| Subtitle | 原著 |
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| Authors | 菅野巖*, 飯田秀博*, 三浦修一*, 山本誠一**, 天野昌治**, 広瀬佳治**, 村上松太郎*, 高橋和弘*, 佐々木広*, 宍戸文男*, 犬上篤*, 上村和夫* |
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| Authors(kana) | |
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| Organization | *秋田県立脳血管研究センター放射線医学研究部, **島津製作所医用技術部 |
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| Journal | 核医学 |
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| Volume | 26 |
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| Number | 4 |
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| Page | 477-485 |
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| Year/Month | 1989/4 |
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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」 静止測定型全身用高分解能ポジトロンエミッショントモグラフィ (PET) 装置HEADTOME IVの設計と初期性能の概要を報告する. 装置は3mm幅の768個のBGO結晶と96本の光電子増倍管からなる検出器リングを4層有する. 横断面内のスキャンは行わない. 動態測定における体軸方向の補間を可能にするため体軸スキャン (Z運動) を行う. 主な性能は, 横断面分解能が半値幅4.5mm, 体軸分解能が9.5mm, 感度は直径20cm一様円筒ファントムに対して直接断面, 交差断面がそれぞれ14, 24kcps/(μCi/ml) であった. 臨床PET装置として, 体軸分解能の向上より断面あたりの感度の維持を優先した. 装置は大容量キャッシュメモリーを備え, デッドタイムや時間減衰の実時間補正, および, コンパートメントモデル解析の速度定数などの荷重積分法計算のための実時間演算を可能にした. |
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| Practice | 臨床医学：一般 |
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| Keywords | Positron emission tomography, Physiological image, Effective resolution, Stationary sampling, Partial volume effect |
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| English |
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| Title | Design Concepts and Preliminary Performances of Stationary-Sampling Whole-Body High-Resolution Positron Emissien Tomograph : HEADTOME IV |
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| Subtitle | Original Articles |
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| Authors | Iwao KANNO*, Hidehiro IIDA*, Shuichi MIURA*, Seiichi YAMAMOTO**, Masaharu AMANO**, Yoshiharu HIROSE**, Matsutaro MURAKAMI*, Kazuhiro TAKAHASHI*, Hiroshi SASAKI*, Fumio SHISHIDO*, Atsushi INUGAMI*, Kazuo UEMURA* |
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| Authors(kana) | |
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| Organization | *Department of Radiology and Nuclear Medicine, Research Institute for Brain Blood Vessels-Akita, **Shimadzu Corporation |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 26 |
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| Number | 4 |
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| Page | 477-485 |
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| Year/Month | 1989/4 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Design concepts and preliminary perfbrmances of a stationary sampling high-resolution whole-body positron emission tomograph, HEADTOME IV, were reported. The system comprises four layers of detector ring which consists of 768 BGO crystals with 3 mm width, 96 photomultiplier tubes arrayed on 825 mm circle. A sufficiently fine sampling-interval allows data sampling without scan motion along the transaxial plane. But an axial motion (Z-motion) is installed to interlace between adjacent planes. Preliminary performance characteristics were an in-plane resolution of 4.5mm in full width at half maximum (FWHM) , an axial resolution of 9.5 mm in FWHM, sensitivities of 14 and 24 kcps/ (μCi/ml) for direct and cross planes, respectively, with 20 cm diam. cylindrical flood phantom. A large scale cache memory prepared for each plane allows a realtime correction for the deadtime and the radionuclide decay, and a realtime calculation of the rate constants using the weighted integral method. |
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| Practice | Clinical medicine |
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| Keywords | Positron emission tomography, Physiological image, Effective resolution, Stationary sampling, Partial volume effect |
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