| Japanese |
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| Title | 4 (Four) Energy Window (FEW) 法による99mTcおよび123I2核種同時SPECT |
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| Subtitle | 原著 |
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| Authors | 松平正道*, 中嶋憲一**, 利波紀久**, 久田欣一*** |
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| Organization | *先端医学薬学研究センターアイソトープ部門, **金沢大学医学部核医学教室, ***北陸中央病院 |
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| Journal | 核医学 |
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| Volume | 34 |
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| Number | 11 |
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| Page | 1013-1020 |
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| Year/Month | 1997/11 |
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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」γ線光電ピークが接近重複している99mTcおよび123Iによる2核種同時SPECTを可能にする4(Four)Energy Window(FEW)法を開発した. この収集法は99mTc main window[126〜143 keV], 123I main window[156-175 keV], および99mTc main windowの下側と123I main windowの上側に5%幅のsub windowすなわち合計4個のenergy windowを設定するものである. さらに99mTc main windowの上側および123I main windowの下側に5%の仮想ウインドウを定め, TEWを応用して散乱線補正を行う. ファントム実験の結果, 両核種データは完全に分離可能であり, 定量性に優れたSPECTデータが得られた. 99mTc-MIBIおよび1231-BMIPPによる心筋2核種同時SPECTでは, 両核種の良好なSPECT像が得られた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 99mTc and 123I, Simultaneous acquisition, Dual isotope SPECT, Four-energy-window method. |
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| English |
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| Title | Dual Isotope SPECT with 99mTc and 123I Using Four - Energy - Window (FEW) Method |
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| Subtitle | Original Articles |
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| Authors | Masamichi MATSUDAIRA*, Kenichi NAKAJIMA**, Norihisa TONAMI**, Kinichi HISADA*** |
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| Authors(kana) | |
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| Organization | *Division of Radioisotope, Radiation Service, **Department of Nuclear Medicine, Kanazawa University Hospital, ***Hokuriku Central Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 34 |
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| Number | 11 |
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| Page | 1013-1020 |
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| Year/Month | 1997/11 |
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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 devised "four-energy-window"(FEW)method which permits simultaneous acquisition for dual isotope single photon emission tomography(SPECT) studies using 99mTc and 123I of which photopeak is in close vicinity to each other. This acquisition method requires a total of four energy windows:two main windows for 99mTc(126-143 keV)and 123I(156-175keV), respectively, and two 5% sub-windows which are set below the 99mTc window and above the 123I window, respectively. Two virtual windows(5%)are additionally set above the 99mTc and bellow the 123I window, respectively, to apply the triple-energy-window(TEW)method for the scatter correction. A phantom study demonstrated that photocounts from the two radionuclides could be completely separated from each other and that SPECT images obtaind had preferable property for quantitative analysis. This method was applied to clinical, dual-radionuclide myocardial studies using 99mTc-MIBI and 123I-BMIPP, and was found to provide excellent images each tracer. |
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| Practice | Clinical medicine |
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| Keywords | 99mTc and 123I, Simultaneous acquisition, Dual isotope SPECT, Four-energy-window method. |
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