| Japanese |
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| Title | 心電図同期99mTc心筋血流SPECTにおける左室容積値, 駆出率自動算出の検討 - ファントムを用いた基礎的評価 - |
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| Subtitle | 技術報告 |
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| Authors | 木下佳美*, 南部一郎*, 遠山淳子**, 大場覚** |
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| Organization | *名古屋第二赤十字病院放射線科, **名古屋市立大学医学部放射線医学教室 |
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| Journal | 核医学 |
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| Volume | 35 |
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| Number | 2 |
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| Page | 77-83 |
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| Year/Month | 1998/2 |
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| Article | 報告 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」心電図同期心筋血流SPECTから左室辺縁自動描出法に基づき左室容積, 左室駆出率を自動算出するプログラム(Quantitative Gated SPECT)について, 99mTc水溶液を用いた心臓ファントムで基礎的評価を行った. データ収集はL字型180°収集と対向型360°収集で行った. 全過程で自動処理が可能で, 所要時間は3〜4分で, 再現性良好であった. 前処理フィルターの cut off 値は0.45が適当であった. cut off 値0.45において左室容積値は, L字型収集で実測値の93%, 対向型収集で95.9%を示した. 左室容積値は, L字型収集の方が対向型収集よりやや低値で有意差を認めた. 90°欠損および中隔, 側壁の180°欠損モデルでは, 欠損部の左室内壁描出は妥当であった. 前壁, 下後壁の180°欠損モデルでは, 欠損部の内壁が前方へ逸脱し, 左室容積値は前壁欠損で過大に, 下後壁欠損で過小に評価された. 今回の前壁, 下後壁の180°欠損モデルに類似する症例では, 慎重に評価する必要があると考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 99mTc, Gated myocardial SPECT, LV volume |
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| English |
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| Title | Automatic Calculation of Left Ventricular Volume and Ejection Fraction from Gated Myocardial Perfusion SPECT - Basic Evaluation Using Phantom - |
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| Subtitle | Technical Reports |
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| Authors | Yoshimi KINOSHITA*, ICHIROU NANBU*, Junko TOHYAMA**, Satoru OOBA** |
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| Authors(kana) | |
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| Organization | *Department of Radiology, Nagoya Daini Red Cross Hospital, **Department of Radiology, Nagoya City University Medical School |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 35 |
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| Number | 2 |
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| Page | 77-83 |
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| Year/Month | 1998/2 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | We evaluated accuracy of Quantitative Gated SPECT Program that enabled calculation of the left ventricular (LV) volume and ejection fraction by automatically tracing the contour of the cardiac surface. Cardiac phantoms filled with 99mTc-solution were used. Data acquisition was made by 180-degree projection in L type and 360-degree projection in opposed type. Automatic calculation could be done in all processes, which required 3 - 4 minutes. Reproducibility was sufficient. The adequate cut off value of a prefilter was 0.45. At this value LV volume was 93% of the actual volume in L type acquisition and 95.9% in opposed type acquisition. The LV volume obtained in L type was smaller than that obtained in opposed type (p < 0.05). The tracing of the defects was fair, on the cardiac phantoms with all of 90-degree defects and 180-degree defects of the septal and lateral wall. The LV volume was estimated to be larger on the phantom with 180-degree defect of the anterior wall, and to be smaller on the phantom of 180-degree defect of the inferoposterior wall. Because tracing was deviated anteriorly at the defects. In the patients with similar conditions to 180-degree defect of the anterior wall or inferoposterior wall, the LV volume should be carefully evaluated. |
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| Practice | Clinical medicine |
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| Keywords | 99mTc, Gated myocardial SPECT, LV volume |
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