| Japanese |
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| Title | 15O標識ガス持続吸入法における定常性の検討 - 定常呼吸時の血液ガス分圧および血液放射能濃度の変動について - |
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| Subtitle | 原著 |
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| Authors | 山口龍生*, 菅野巖*, 飯田秀博*, 宍戸文男*, 上村和夫* |
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| Organization | *秋田県立脳血管研究センター放射線医学研究部 |
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| Journal | 核医学 |
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| Volume | 23 |
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| Number | 1 |
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| Page | 9-16 |
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| Year/Month | 1986/1 |
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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」15O標識ガス持続吸入法によるPET測定の際の誤差要因の評価の一つとして, 定常呼吸時における血液ガス分圧, 血液放射能濃度の変動を, 300余例の実測データについて検討した. C15O2, 15O2, C15Oおのおの吸入時のPET測定時の血液データの変化の程度は, 平均値に対する標準偏差の割合, すなわち変動係数として表わし, そのヒストグラムを求めた. 変動係数の平均値による評価では, 血液ガス分圧の変動は, C15O2吸入時の定常状態では, 二酸化炭素分圧2.6%, 酸素分圧4.5%, 15O2吸入時の定常状態では, 二酸化炭素分圧2.3%, 酸素分圧4.1%であった. 血液放射能濃度の変動は, C15O2吸入時の定常状態では, 全血6.0%, 血漿5.7%, 15O2吸入時の定常状態では, 全血6.2%, 血漿5.2%であった. C15O吸入時のPET測定時における全血放射能濃度の変動については1.9%であった. |
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| Practice | 臨床医学：一般 |
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| Keywords | O-15 labelled gas steady-state method, Positron emission tomography, Error analysis, Blood gas, Blood radioactivity. |
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| English |
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| Title | Error Analysis in the 15O Labelled Gas Inhalation Method - Evaluation of Steadiness of Arterial Blood Gas and Radioactivity During "Steady State" of Radioactive Gas Inhalation - |
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| Subtitle | Original Articles |
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| Authors | Tatsuo YAMAGUCHI, Iwao KANNO, Hidehiro IIDA, Fumio SHISHIDO, Kazuo UEMURA |
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| Organization | Department of Radiology and Nuclear Medicine, Research Institute for Brain and Blood Vessels-Akita |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 23 |
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| Number | 1 |
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| Page | 9-16 |
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| Year/Month | 1986/1 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | Unsteadiness during "steady state" examination, which is one of the most serious factors causing error in the measurement of cerebral blood flow and metabolism using 15O labelled gas inhalation method and positron emission tomography (PET), was investigated with analysis of the practical values of the arterial blood gas and radioactivity on 325 examinations. Deviation of each value on arterial blood samples during each PET scan was evaluated as coefficient of variance (C.V.), and the histograms of each C.V. were presented. During "steady state" of C15O2 inhalation, the mean of the C.V. was 2.6% for PaCO2, 4.5% for PaO2, 6.0% for 15O radioactivity in arterial whole blood, and 5.7% for 15O in arterial plasma. During 15O2 inhalation, the mean was 2.3%, 4.1%, 6.2% and 5.2% for PaCO2, PaO2, whole blood 15O radioactivity and plasma 15O radioactivity, respectively. In C15O scan, the mean of the C.V. was 1.9% for 15O radioactivity in arterial whole blood. |
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| Practice | Clinical medicine |
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| Keywords | O-15 labelled gas steady-state method, Positron emission tomography, Error analysis, Blood gas, Blood radioactivity. |
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