| Japanese |
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| Title | 多結晶型ガンマカメラを使用した第1回循環時法による左室位相解析 - 統計精度および再現性の検討 - |
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| Subtitle | 原著 |
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| Authors | 二谷立介*, 瀬戸光*, 山西潤一**, 亀井哲也*, 柿下正雄*, 杉本恒明*** |
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| Authors(kana) | |
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| Organization | *富山医科大学医学部放射線医学教室, **富山大学教育学部附属教育実践研究指導センター, ***東京大学医学部第二内科学教室 |
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| Journal | 核医学 |
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| Volume | 20 |
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| Number | 8 |
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| Page | 1155-1162 |
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| Year/Month | 1983/9 |
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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」計数率特性のすぐれた多結晶型ガンマカメラを使用して, 第1回循環時法により左室長軸像の位相解析を行うプログラムを開発し, データの統計精度および再現性を検討した. そして下記の結果を得た. 1) 左室位相解析に必要な1心拍の分割数は16以上であった. また16以上なら位相解析データの統計精度は変化しなかった. 2) 位相値の統計精度は局所駆出率が低下すると悪くなった. このため壁運動低下部の位相値の評価には注意する必要があった. 3) Na99mTcO4 20mCi投与して, 多結晶型ガンマカメラを使用した第1回循環時法による左室位相解析を行うと, 各画素の振幅値の統計誤差は3%以内 (1 S.D.) , 駆出率20%での位相値の統計誤差は10°以内 (1 S.D.) と良好だった. 4) 20例の検討で, 本法による振幅イメージ, 位相イメージ, 左室位相分布ヒストグラムの再現性は, 良好だった. 虚血性心疾患患者における壁運動評価法として, 本法の有用性は高いと考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | Radionuclide angiocardiography, Multicrystal camera, First pass method, Phase study, Regional wall motion |
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| English |
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| Title | Fourier Phase Analysis of the Left Ventricle by First-Pass Angiocardiography Using a Multi-Crystal Gamma Camera |
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| Subtitle | |
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| Authors | Ryusuke FUTATSUYA*, Hikaru SETO*, Junichi YAMANISHI**, Tetsuya KAMEI*, Masao KAKISHITA*, Tsuneaki SUGIMOTO*** |
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| Authors(kana) | |
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| Organization | *Department of Radiological Sciences, Faculty of Medicine, Toyama medical and Phamaceutical University, **Faculty of Eeducation, Toyama University,, ***Department of Medicine, Tokyo University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 20 |
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| Number | 8 |
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| Page | 1155-1162 |
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| Year/Month | 1983/9 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] To assess the regional wall motion of the left ventricle, a long axis view is preferable to detect and locate the sites of ischemic lesions. However, first-pass cardiac data with a single-crystal camera is relatively erroneous for studies on a pixel-by-pixel basis. Temporal Fourier analysis was applied to the data of first-pass angiocardiography with a multicrystal camera and its statistical error and reproducibility were assessed. In one pixel (1.21 cm) , the statistical error of the standardized amplitude value was lower than 3% (1 S.D.) . The statistical error of the phase value was increased as the regional ejection fraction of the pixel was decreased. However, the phase S.D. was lower than 10 degree even though the regional ejection fraction decreased to 20%. The reproducibility of the amplitude image, phase image and phase histogram of the left ventricle in 20 cases were very good. Correlation coefficient of the phase histogram S.D. between two studies is 0.94. From the above results, Fourier phase analysis of the left ventrical using a multi-crystal camera is a statistically accurate and reliable method to assess the regional wall motion of the left ventricle in the long axis view. |
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| Practice | Clinical medicine |
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| Keywords | Radionuclide angiocardiography, Multicrystal camera, First pass method, Phase study, Regional wall motion |
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