| Japanese |
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| Title | 散乱, 吸収補正による脳SPECTの定量化 - トランスミッション, エミッションデータの別収集法と同時収集法の比較 - |
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| Subtitle | 短報 |
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| Authors | 橋本順*, 三宮敏和*, 久保敦司*, 尾川浩一**, 市川隆***, 本村信篤*** |
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| Organization | *慶應義塾大学医学部放射線科, **法政大学工学部電気工学科, ***東芝那須 |
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| Journal | 核医学 |
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| Volume | 32 |
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| Number | 12 |
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| Page | 1369-1374 |
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| Year/Month | 1995/12 |
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| Article | 報告 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」Triple Energy Window散乱線補正法とトランスミッションスキャン(以下TCT)を併用して脳SPECTの散乱線補正, 吸収補正を行った. トレーサとして99mTc-ECDを, TCT用の外部線源として99mTcを使用した. 短焦点型ファンビームコリメータを装着した3検出器型SPECT装置を使用し, 99mTc線線源をトランスミッション線源としてコリメータの3焦線に設置した. データ収集方法は3本の線源を用いたTCT終了後にトレーサを投与してエミッションスキャン(以下ECT)を行う別収集法と, トレーサを先に投与して1本の線源でTCTとECTを同時に行う同時収集法の2通りの方法を検討した. 別収集法と同時収集法の双方で散乱線補正, 吸収補正後のSPECTカウント値を比較したところほぼ同等であった. 同時収集法は検査所要時間が短く, TCTデータとECTデータとの間で被検体の位置ずれもなく, 実用的な収集プロトコールであると考えられる. |
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| Practice | 臨床医学：一般 |
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| Keywords | Brain SPECT, Scatter correction, Triple energy window method, Attenuation correction, Simultaneous emission-transmission scan. |
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| English |
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| Title | Quantitative Brain SPECT Imaging with Scatter and Attenuation Compensation : Comparison of Sequential and Simultaneous Acquisition of Transmission and Emission Data |
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| Subtitle | |
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| Authors | Jun HASHIMOTO*, Toshikazu SAMMIYA*, Atsushi KUBO*, Koichi OGAWA**, Takashi ICHIHARA***, Nobutoku MOTOMURA*** |
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| Authors(kana) | |
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| Organization | *Department of Radiology, School of Medicine, Keio University, **Department of Electrical Engineering, College of Engineering, Hosei University, ***Toshiba Nasu Works |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 32 |
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| Number | 12 |
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| Page | 1369-1374 |
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| Year/Month | 1995/12 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary]Scatter and attenuation correction for brain SPECT of a phantom and a normal volunteer was performed using the Triple Energy Window method combined with a transmission scan. 99mTc-ECD and 99mTc solution were used as an emission tracer and a transmission source, respectively. We employed a tripleheaded SPECT gammacamera system equipped with fan-beam collimators for acquisition with line transmission sources placed at the focal lines of the fanbeam collimators. Two mode, sequential mode and simultaneous mode, of data acquisition protocols were examined. In the sequential mode, a transmission scan was carried out using three external sources for the brain phantom without emission tracer. After removing all sources, an emission scan was performed on the brain phantom containing the tracer. In the simultaneous mode, the injection was followed by a simultaneous transmission-emission scan using one transmission source. The same study was conducted out for the normal volunteer, after confirming the effectiveness of these protocols with phantom studies. Corrected SPECT count values obtained with two protocols were almost identical. Simultaneous mode had advantages in avoiding misalignment between transmission and emission data and in shorter acquisition time than sequential mode. |
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| Practice | Clinical medicine |
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| Keywords | Brain SPECT, Scatter correction, Triple energy window method, Attenuation correction, Simultaneous emission-transmission scan. |
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