| Japanese |
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| Title | Cadmium Telluride検出器を用いた携帯型持続心機能モニター (VEST) の基礎的検討 |
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| Subtitle | ≪原著≫ |
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| Authors | 滝淳一*, 村守朗*, 中嶋憲一*, 分校久志*, 松成一朗*, 利波紀久*, 久田欣一* |
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| Organization | *金沢大学医学部核医学科 |
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| Journal | 核医学 |
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| Volume | 28 |
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| Number | 4 |
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| Page | 371-379 |
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| Year/Month | 1991/4 |
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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」Cadmium telluride detectorを用いた携帯型持続心機能モニター(VEST)の基本性能をファントムおよび臨床例において検討した. 計数率特性は20kcpsまでは放射能と計数率は比例し臨床使用量の範囲内(925-1, 295MBq (25-35 mCi))では数え落としは無いことが解った. 検出器から心室ファントム中心までの距離が6cmでは200ml, 8cm以上では300ml以上で容積の過小評価傾向を認めたが駆出率(EF)は実測値に近い値を示した. 臨床例10例における検出器の位置ずれに関する検討では, 心臓に対して右上方, 上方または左方への1-2cmのずれで平均3〜6.3%のEFの過小評価を生じたが他の方向への2cm以内のずれでは一定の変化傾向を示さなかった. 臨床例においてガンマカメラより求めたEF (X)とVESTでのEF (Y)は安静時Y=0.96X + 3.6 (%) (r=0.93, n=37, p<0.001)の相関を示した. 安静時から運動負荷時および負荷後早期のEF変化をガンマカメラ(X), VEST (Y)で比較するとやはりY=0.95X + 0.8 (%) (r=0.85, n=20, p<0.001)の良好な相関を認めた. 以上よりCadmium telluride detectorを用いたVESTは著明な心拡大を示す症例を除いて信頼性の高い心機能データを提供すると考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Ambulatory ventricular function monitoring device, Cadmium telluride detector, Left ventricular ejection fraction. |
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| English |
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| Title | Basic Evaluation of an Ambulatory Ventricular Function Monitor with Cadmium Telluride Detector |
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| Subtitle | - Original Articles - |
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| Authors | Junichi TAKI, Akira MURAMORI, Kenichi NAKAJIMA, Hisashi BUNKO, Ichiro MATSUNARI, Norihisa TONAMI, Kinichi HISADA |
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| Authors(kana) | |
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| Organization | Department of Nuclear Medicine, Kanazawa University School of Medicine |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 28 |
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| Number | 4 |
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| Page | 371-379 |
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| Year/Month | 1991/4 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] The reliability of a new ambulatory ventricular function monitor (VEST) with cadmium telluride (Cd-Te) detector was validated. No counting loss was observed under 20 kcps. In phantom study, more than 200 ml with 6 cm distance from the detector and more than 300 ml with 6-12 cm distance, underestimation of volume was observed. Ejection fraction (EF) calculated in phantom study showed close value to the true EF in 50-400 ml of end-diastolic volume. In 10 patients, 1-2 cm dector shift toward right upper, upper and left showed underestimation of EF. Good correlation of gamma camera EF (X) and VEST EF (Y) was obtained (Y=0.96X + 3.6(%), n=37, r=0.93, p<0.001). EF change from rest values, obtained from each comparable exercise and post exercise stage by gamma camera (X) and VEST (Y), showed good correlation (Y=0.95X + 0.8, n=20, r=0.85, p<0.001). In conclusion Cd-Te VEST was considered as a reliable EF measurement technique Similar to gamma Camera. |
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| Practice | Clinical medicine |
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| Keywords | Ambulatory ventricular function monitoring device, Cadmium telluride detector, Left ventricular ejection fraction. |
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