| Japanese |
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| Title | 左室壁厚が201Tl心筋SPECTイメージにおよぼす影響 - 心筋ファントムによる検討 - |
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| Subtitle | 技術報告 |
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| Authors | 古東正宜*, 名村宏之**, 川瀬修三*, 山崎克人***, 河野通雄*** |
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| Authors(kana) | |
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| Organization | *神戸大学医学部附属病院中央放射線部, **第一内科教室, ***放射線医学教室 |
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| Journal | 核医学 |
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| Volume | 33 |
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| Number | 7 |
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| Page | 771-777 |
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| Year/Month | 1996/7 |
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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」 201Tl心筋SPECTは冠血管疾患ならびに心筋のviabilityの診断にはplanar像に比べsensitivity, specificity, 正診率において優れていることは知られている. SPECT像はまた診断のsensitivityや解剖学的なオリエンテーションにおいてplanar像より優れる. しかし装置の空間分解能の限界のため, 壁の菲薄化した患者ではしばしば劣化したSPECT像が得られる. 拡張型心筋症で見られるように左心室が著明に菲薄化した患者におけるSPECT像の正診率を調査するためにわれわれは7mm厚の心筋ファントムを用いて実験的研究を行った. ファントムの断層像は人工的な欠損像はみられなかったがむしろ不均一であった. 拡張型心筋症は左心室の不均一な欠損像によって特徴づけられると考えられる. 臨床的な所見に加え技術的な制約があるために, 菲薄な左心室壁の患者の心筋灌流を明らかにするためには充分注意を要する. |
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| Practice | 臨床医学：一般 |
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| Keywords | 201Tl myocardial SPECT, Phantom study, Artifact, DCM. |
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| English |
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| Title | Effect of Wall Thickness of Left Ventricle on 201Tl Myocardial SPECT Images : Myocardial Phantom Study |
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| Subtitle | |
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| Authors | Masanobu KOTO*, Hiroyuki NAMURA**, Osami KAWASE*, Katsuhito YAMASAKI***, Michio KONO*** |
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| Authors(kana) | |
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| Organization | *Central Division of Radiology, Kobe University Hospital, **First Department of Internal Medicine, Kobe University School of Medicine, ***Department of Radiology, Kobe University School of Medicine |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 33 |
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| Number | 7 |
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| Page | 771-777 |
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| Year/Month | 1996/7 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | 201Tl myocardial SPECT is known for better sensitivity, specificity, and accuracy than planar images in detecting coronary artery disease and diagnosing myocardial viability. SPECT images are also superior to planar images in diagnostic sensitivity and anatomical orientation. However, as limitation of the spatial resolution of the machine, we often encounter poor SPECT plower image quality in patients with decreased wall thickness. To test the accuracy of SPECT images in patients with marked thinning of the left ventricular wall, as occurs in dilated cardiomyopathy, we performed a experimental study using myocardial phantom with 7 mm wall thickness. Tomographic image of the phantom images were rather heterogeneous, though no artificial defect was located. Dilated cardiomyopathy is thought to be characterized by patchy defects in the left ventricle. Careful attention should be given to elucidating myocardial perfusion in patients with a thin left ventricle wall, as there are technical limitations in addition to clinical features. |
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| Practice | Clinical medicine |
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| Keywords | 201Tl myocardial SPECT, Phantom study, Artifact, DCM. |
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