| Japanese |
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| Title | Count-based法を用いた平衡時心電図同期心プールシンチグラフィによる左室絶対容積の算出 - 第一報 ファントム実験による検討 - |
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| Subtitle | 原著 |
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| Authors | 安野泰史*, 竹内昭*, 江尻和隆*, 古田敏也**, 下方辰幸**, 黒川洋**, 近藤武**, 渡辺佳彦**, 水野康**, 古賀佑彦* |
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| Authors(kana) | |
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| Organization | *藤田学園保健衛生大学医学部放射線科, **内科 |
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| Journal | 核医学 |
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| Volume | 24 |
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| Number | 12 |
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| Page | 1717-1722 |
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| Year/Month | 1987/12 |
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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」平衡時心電図同期心プールシンチグラフィからcount-based法により左室絶対容積を算出するためには, どのような線減弱, 散乱線補正が必要であるかについて水ファントム実験を行って検討した. 補正しない場合Transmission Factor 1(TF1)=1, TFを水深(d)の関数として補正する場合TF2=e-0.15d, TF3=e-0.13d, TF4=1-(1-e-0.125d)1.26として容積を算出し, 実測した容積と比較した. その結果, TF1の場合は回帰直線Y=0.33X+0.51, r=0.999であり, 著明に過小評価された. TF2の場合はY=1.27X+1.99, r=0.999であり過大評価された. TF3の場合はY=1.06X+1.66, r=0.999であり最も実測値に近い値を算出できた. TF4の場合Y=0.84X+0.51, r＝0.999であり過小評価された. また深さを変化させた場合TF3の補正が最も実測値に近い値であり変動が少なかった. これらのファントム実験からcount-based法により絶対容積を算出するためには, TF3=e-0.13dの線減弱補正が必要であると思われた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Count-based method, Gated equilibrium blood pool scintigraphy, Left ventricular volume, Heart, Phantom study. |
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| English |
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| Title | Evaluation of Absolute Left Ventricular Volume by Gated Equilibrium Blood Pool Scintigraphy Using Count-Based Method : Phantom Study |
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| Subtitle | - Original Articles - |
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| Authors | Hirofumi ANNO*, Akira TAKEUCHI*, Kazutaka EJIRI*, Toshiya FURUTA**, Tatsuyuki SHIMOKATA**, Hiroshi KUROKAWA**, Takeshi KONDO**, Yoshihiko WATANABE**, Yasushi MIZUNO**, Sukehiko KOGA* |
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| Authors(kana) | |
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| Organization | *Department of Radiology, **Department of Internal Medicine, Fujita-Gakuen Health University School of Medicine |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 24 |
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| Number | 12 |
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| Page | 1717-1722 |
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| Year/Month | 1987/12 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | The phantom study was performed in order to determine the absolute left ventricular volume by gated equilibrium blood pool scintigraphy using the count-based method. A thin, circular source was prepared containing 1 mCi (37 MBq) of Tc-99m pertechnetate. The source was counted in air and at multiple depths in a water phantom for a 20% window setting and the transmission factor (TF) was determined (TF4=1-(1-e-0.125d)1.26 d:depth). Further, the volume sources of water in balloon containing Tc-99m pertechnetate were prepared and counted. The volume was calculated by the count-based method using each TF (TF1=1, TF2 (water)=e-0.15d, TF3=e-0.13d and TF4). The each volume by radionuclide (RN) was significantly correlated with true volume: TF1(V(RN)=0.33×V(true)+0.51, r=0.999, V:volume), TF2(V(RN)=1.27×V(true)+1.99, r=0.999), TF3(V(RN)=1.06×V(true)+1.66, r=0.999) and TF4(V(RN)=0.84×V(true)+1.51, r=0.999), respectively. In conclusion, the count-based method using TF was reliable to estimate the absolute volume. |
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| Practice | Clinical medicine |
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| Keywords | Count-based method, Gated equilibrium blood pool scintigraphy, Left ventricular volume, Heart, Phantom study. |
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