| Japanese |
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| Title | SPECT性能測定用ファントムの試作 |
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| Subtitle | 原著 |
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| Authors | 福喜多博義*, 小山田日吉丸*, 野畑強*, 川合英夫* |
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| Organization | *国立がんセンター放射線診断部 |
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| Journal | 核医学 |
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| Volume | 22 |
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| Number | 2 |
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| Page | 201-207 |
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| Year/Month | 1985/2 |
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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」ガンマカメラ回転方式によるSPECTの性能を測定するため, 特殊なファントムを試作した. ファントムは異なった目的をもつ5種類の円柱からなり, それぞれ空間分解能, 均一性, スライス厚さ, 濃度直線性, 画像歪が測定可能である. 1個のファントムの寸法は外径30cm, 厚さ7cmのdisk状をなしており, その中は, それぞれの測定目的のために設計されている. 測定する場合には大視野カメラの検出器直径がおよそ35cmであることから, 1個のファントムを最大4個まで並べて測定し, 1度に4項目の性能が測定できる. そして実際にファントムを用いてわれわれの装置 (LFOV-E) のSPECTに関する性能を測定した. この試作ファントムは取扱いが簡便なことから, 性能測定だけでなく, 日常の定期点検にも利用可能であった. |
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| Practice | 臨床医学：一般 |
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| Keywords | Single photon emission computed tomography, Phantom |
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| English |
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| Title | Development of the New Phantom for Evaluation of SPECT Performance |
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| Subtitle | |
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| Authors | Hiroyoshi FUKUKITA, Hiyoshimaru OYAMADA, Tsuyoshi NOBATA, Hideo KAWAI |
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| Authors(kana) | |
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| Organization | Department of Radiology, National Cancer Center |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 22 |
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| Number | 2 |
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| Page | 201-207 |
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| Year/Month | 1985/2 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] We developed a new phatom designed to evaluate the SPECT system performances of rotational gamma cameras. This phantom is composed of 5 parts, and each of them has its own purpose ; such as measurements of 1) spatial resolution, 2) slice thickness, 3) dose linearity, 4) uniformity, and 5) image distortion. These parts are made of lucite (0.8cm in thickness) and each of them has the same disc-shape, measuring 28.4 cm in inner diameter and 7 cm in inner length. For the large field of view cameras, it is possible to set up-to 4 parts together if necessary. Therefore, 4 different parameters can be obtained at one rotation. The phantom was filled with 99mTc solution, and SPECT data were obtained as follows ; for the determination of spatial resolution and slice thickness, 128 linear sampling with every 5°angular rotation was performed, and 64 linear sampling with every 10°angular rotation for dose linearity, uniformity and image distortion. The values obtained with the phantom were FWHM of 19.1mm for spatial resolution, FWHM of 19.9mm for slice thickness, and integral uniformity of 36.4%. For image distortion it was easy to detect the misalignment of the electrical and mechanical axes. We found that this phantom was a suitable tool as a routine quality control and daily maintenance of SPECT system. |
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| Practice | Clinical medicine |
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| Keywords | Single photon emission computed tomography, Phantom |
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