| Japanese |
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| Title | Tl-201心筋SPECTを用いた壁厚展開図による心筋壁厚の定量評価とその臨床的有用性 |
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| Subtitle | 原著 |
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| Authors | 堰合恭弘*, 沢井通彦*, 村山晋*, 丹野恒明*, 三国谷淳*, 小野寺庚午*, 西沢一治**, 兼平二郎**, 岡本勝博***, 鎌田斉**** |
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| Authors(kana) | |
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| Organization | *弘前大学医学部第二内科, **放射線科, ***弘前市立病院内科, ****放射線部 |
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| Journal | 核医学 |
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| Volume | 25 |
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| Number | 8 |
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| Page | 749-757 |
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| Year/Month | 1988/8 |
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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」Tl-201心筋SPECT像を用いて, 心筋肥厚部位を客観的かつ定量的に評価するため, 展開図形式の壁厚図を考案し作製した. 壁厚図の意義を, ファントムを用いた基本的面ならびに心エコー法による臨床的面から検討した. 壁厚図の作製には撮像した画像から5.6mm間隔で短軸断層像, 矢状断層像, および水平断層像を得て, 心中央部では短軸断層像から, 心尖部では矢状断層像, 水平断層像の中心を通る断面から壁厚を求めた. 壁厚の決定にはcut off法を用い, cut level以上のピクセル数を壁厚とした. ファントムを用いた基本的検討では10mm以下の壁厚の識別は不可能と思われたが, 10mm, 15mm, 20mmの壁厚の識別は可能であった. また, 心エコー法で求めた心室中隔の厚さは本法で求めた値と良い正相関を示した(r=0.96). われわれが作製した壁厚図は, 心筋肥厚部位の客観的かつ定量的評価に有用な方法と思われる. |
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| Practice | 臨床医学：一般 |
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| Keywords | Wall thickness map, SPECT, Thallium-201, Left ventricular hypertrophy. |
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| English |
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| Title | Quantitative Estimation of Myocardial Thickness by the Wall Thickness Map with Tl-201 Myocardial SPECT and its Clinical Use |
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| Subtitle | - Original Articles - |
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| Authors | Yasuhiro SEKIAI*, Michihiko SAWAI*, Susumu MURAYAMA*, Tsuneaki TANNO*, Atsushi MIKUNIYA*, Kogo ONODERA*, Kazuharu NISHIZAWA**, Jiro KANEHIRA**, Katsuhiro OKAMOTO***, Hisashi KAMATA**** |
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| Authors(kana) | |
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| Organization | *The Second Department of Internal Medicine, **Department of Radiology, Hirosaki University School of Medicine, ***Department of Internal Medicine, ****Department of Radiology, Hirosaki Municipal Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 25 |
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| Number | 8 |
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| Page | 749-757 |
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| Year/Month | 1988/8 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | To estimate the wall thickness of left ventricular myocardium objectively and quantitatively, we adopted the device of wall thickness map (WTM) with Tl-201 myocardial SPECT. For validation on measuring left ventricular wall thickness with SPECT, fundamental studies were carried out with phantom models, and clinical studies were performed in 10 cases comparing the results from SPECT with those in echocardiography. To draw the WTM, left ventricular wall thickness was measured using the cut off method from SPECT images obtained at 5.6 mm intervals from the base and middle of left ventricle: short-axis image for the base and middle of left ventricle and vertical and horizontal long-axis images for the apical region. Wall thickness was defined from the number of pixel above the cut off level. Results of fundamental studies disclosed that it is impossible to evaluate the thickness of less than 10 mm by Tl-201 myocardial SPECT but possible to discriminate wall thickness of 10 mm, 15 mm, and 20 mm by Tl-201 myocardial SPECT. Echocardiographic results supported the validity of WTM, showing a good linear correlation (r=0.96) between two methods on measuring wall thickness of left ventricle. We conclude that the WTM applied in this report may be useful for objective and quantitative estimation of myocardial hypertrophy. |
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| Practice | Clinical medicine |
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| Keywords | Wall thickness map, SPECT, Thallium-201, Left ventricular hypertrophy. |
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