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| Title | Myocardial Scintigram with Thallium-201 : Basic Investigation of the Interpolative Background Subtraction Method |
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| Authors | Michihiro NARITA*, Masahisa USAMI*, Tadashi KURIHARA*, Minoru HONDA**, Tadashi OGAWA**, Keisuke KANAO** |
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| Organization | *Department of Internal Medicine, Sumitomo Hospital, **Division of Nuclear Medicine, Sumitomo Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 15 |
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| Number | 2 |
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| Page | 227-230 |
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| Year/Month | 1978/4 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | Recently developed myocardial imaging with 201Tl is useful for evaluation of coronary heart disease. But inherent low myocardial-to-background ratios obscure the detailed evaluation of image. Therefore nontarget background is generally handled by subtraction across the broad (threshold setting) or by delinearization of display responce (contrast enhancement). Goris et al recently reported a method of interpolative background subtraction for 201Tl myocardial images. The images so processed have no background activity and implication was that lesion detection was improved and clinical usefullness was great. We used animal models to determine precisely true myocardial component of 201Tl images and compared these true myocardial images with interpolative background subtracted myocardial images. |
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| Practice | Clinical medicine |
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| Keywords | myocardial scintigram, interpolative, background subtraction |
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| Japanese |
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| Title | 補間法によるバックグラウンド除去心筋シンチグラム - その基礎的研究 - |
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| Subtitle | 研究速報 |
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| Authors | 成田充啓 |
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| Organization | 住友病院 内科 |
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| Journal | 核医学 |
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| Volume | 15 |
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| Number | 2 |
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| Page | 227-230 |
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| Year/Month | 1978/4 |
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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心筋シンチグラムは, 虚血性心疾患の診断に有用な方法であるが, しばしば, バックグラウンドの存在が, シンチグラムの解釈を困難とする. そのため, これらバックグラウンド除去を目的とし, interpolative background subtractionを行ない, 本法の有用性を, 3匹の家兎を用いて検討した. 家兎耳静脈より201TlCl(1-2 mCi)を静注, 15分後屠殺し, pinhole collimatorを用い, まずheart in situの状態で, 心筋イメージングを行なった(original image). 次いで心臓を取り除き, イメージングした(true background). original imageよりtrue backgroundを差し引いたtrue heart imageと, original imageよりinterpolative backgroundを差し引いたイメージを作成, この両者を比較検討した. 両イメージは視覚上同一であり, profil curve, 心筋カウント数の比較でもよく一致した. またinterpolative background法は, constant-average-background法よりすぐれていた. |
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| Practice | 臨床医学：一般 |
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| Keywords | myocardial scintigram, interpolative background subtraction |
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