| Japanese |
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| Title | PET検査における68Ga/68Geトランスミッションスキャンを用いた肺腫瘤性病変の部分容積効果補正 |
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| Subtitle | 原著 |
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| Authors | 赤司祐子*, 桑原康雄*, 一矢有一*, 佐々木雅之*, 吉田毅*, 福村利光*, 増田康治* |
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| Authors(kana) | |
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| Organization | *九州大学医学部放射線科 |
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| Journal | 核医学 |
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| Volume | 31 |
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| Number | 12 |
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| Page | 1511-1517 |
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| Year/Month | 1994/12 |
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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」トランスミッションスキャンを用いた部分容積効果補正を肺腫瘤性病変を対象としたFDG PET検査で試みた. まず, 球形ファントムを用い基礎的検討を行ったが良好な結果であった. 臨床例の検討は最大径0.8cmから8.0cmまでの28個の肺腫瘤性病変を対象とした. 腫瘤のtissue fractionは背筋部を1とし, 腫瘤部のトランスミッション値から肺野のトランスミッション値を差し引くことにより求めた. 補正前では腫瘤径が大きなものほど腫瘤/筋肉カウント比 (TMR) が高かったが, 補正後は大きさとTMRとに相関がみられなくなった. 本法は腫瘤が胸膜や大血管に接している場合にはtissue fractionが過大評価され, 補正が不充分となるなどの問題点があるが, 簡便かつ精度も高く, 肺腫瘤性病変の部分容積効果補正に有用であると考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Positron emission tomography, Transmission scan, Partial volume effect, Pulmonary mass lesion |
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| English |
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| Title | The Partial Volume Effect Correction for Pulmonary Mass Lesions Using a 68Ga/68Ge Transmission Scan in PET Study |
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| Subtitle | Original Articles |
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| Authors | Yuko AKASHI, Yasuo KUWABARA, Yuichi ICHIYA, Masayuki SASAKI, Tsuyoshi YOSHIDA, Toshimitsu FUKUMURA, Kouji MASUDA |
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| Authors(kana) | |
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| Organization | Department of Radiology, Faculty of Medicine, Kyushu University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 31 |
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| Number | 12 |
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| Page | 1511-1517 |
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| Year/Month | 1994/12 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] We tried to correct the partial volume effect for pulmonary mass lesions using a 68Ga/68Ge transmission scan. Initially, a fundamental study was done using spherical phantoms and good results were obtained. Next, a clinical evaluation was performed on 28 pulmonary mass lesions ranging in diameter from 0.8 cm to 8.0 cm. The tissue fractions of the mass lesions were obtained by a 68Ga/68Ge transmission scan, where the tissue fraction in the back muscles was assumed to have a value of 1. The tissue fraction of the surrounding lung field was subtracted from that of each mass lesions, and the net tissue fraction was thereby obtained. When no correction was required, the tumor/muscle count ratio (TMR) became higher in proportion with an increase in the mass size. After performing a correction, however, no correlation was observed between them. This method was both easy to perform and reliable, and it is thus considered to be useful for overcoming the partial volume effect in pulmonary mass lesions, although an underestimation may still occur in cases with mass lesions either near the great vessels or the chest wall. |
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| Practice | Clinical medicine |
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| Keywords | Positron emission tomography, Transmission scan, Partial volume effect, Pulmonary mass lesion |
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