| Japanese |
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| Title | トモスキャナーIIによる横断断層シンチグラフィー - 第3報 焦点距離20cmの新型コリメータによる躯幹部検査についての検討 - |
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| Subtitle | 原著 |
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| Authors | 前田敏男*, 松田博史*, 久田欣一*, 山田正人**, 松平正道** |
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| Organization | *金沢大学医学部核医学科, **金沢大学医学部附属病院アイソトープ部 |
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| Journal | 核医学 |
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| Volume | 17 |
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| Number | 5 |
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| Page | 537-542 |
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| Year/Month | 1980/6 |
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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」 single photon emission computed tomography装置として開発されたトモスキャナーIIに焦点距離20 cmの新型コリメータを装着して, 躯幹部検査条件でファントム実験を行なった. 検出器間距離を44 cmとした場合のスライス中心部の分解能は半値幅で2.2 cmであり, スライス厚さの半値幅は1.5 cmであった. この値は中心より半径5 cm以内では均一であり, それよりも外側ではコリメータに近づくにしたがい多少悪化した. しかし, 全体として深さ方向の分解能とスライス厚さはほぼ均一となった. 吸収補正によりflood phantomのRI分布は均一に再構成された. Alderson肝ファントム深部の直径1.3 cmの球形欠損を検出でき, ガンマカメラよりも優れた検出能を示した. ダ円ファントム中の円柱形欠損の検出限界は直径1.1 cmであった. |
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| Practice | 臨床医学：一般 |
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| Keywords | Body RCT, RCT, Single photon radionuclide computed tomography |
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| English |
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| Title | Single Photon Radionuclide Computed Tomography with Tomogscanner II : (3) Body Phantom Study with New Collimator of 20 cm Focal Depth |
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| Subtitle | Original Articles |
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| Authors | Toshio MAEDA*, Hiroshi MATSUDA*, Masato YAMADA**, Masamichi MATSUDAIRA**, Kinichi HISADA* |
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| Authors(kana) | |
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| Organization | *Department of Nuclear Medicine, **Divition of Central Radioisotope Service Kanazawa University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 17 |
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| Number | 5 |
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| Page | 537-542 |
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| Year/Month | 1980/6 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Physical data on the Tomogscanner II were reported by us previously, but those data were based on the 13 cm focal depth collimator. This paper added the data obtained from the body phantom study with the 20 cm focal depth collimator. The distance between the two detectors of tomogscanner was 44 cm apart for the body study. At the center of the slice, the FWHM of the resolution and the FWHM of the slice thickness were 2.2 cm and 15 cm respectively. However, these values were uniform within 5 cm radius from the rotating center and worse near the collimator surface, the resolution and slice thickness were much improved with the new collimators compared with the previous short focus collimators. The absorption correction flattened the profile activity on the reconstructed image of the 20×29 cm elliprical body phantom. The cold lesion detectability was superior to the gamma camera, and the Tomogscanner II detected as small as 1.3 cm of diameter of the cold lesion located deeply in the Alderson's liver phantom. |
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| Practice | Clinical medicine |
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| Keywords | Body RCT, RCT, Single photon radionuclide computed tomography |
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