| Japanese |
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| Title | 123I-MIBG心筋シンチグラフィの下壁評価法の検討 - SPECT像とplanar像の比較 - |
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| Subtitle | 短報 |
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| Authors | 小林秀樹*, 百瀬満*, 柏倉健一*, 松本延介*, 斉藤克己**, 浅野竜太**, 細田瑳一**, 日下部きよ子* |
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| Organization | *東京女子医科大学放射線科, **循環器内科 |
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| Journal | 核医学 |
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| Volume | 32 |
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| Number | 2 |
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| Page | 205-209 |
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| Year/Month | 1995/2 |
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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」MIBG心筋シンチグラフィにおける, SPECT像とplanar像の下壁欠損所見を比較するため, 視覚的にSPECT像, planar像のいずれも下壁欠損がない正常群 (N=10), SPECT像にのみ下壁欠損が認められる不一致群 (N=7), SPECT像とplanar像いずれも下壁欠損が認められる一致欠損群 (N=12) に分類して, RI集積の定量的指標を比較した. SPECT像およびplanar像の下壁/前壁カウント比 (I/A) は, 正常群で0.96±0.11 vs. 0.97±0.05, 不一致群0.59±0.21 vs. 0.99±0.13, 一致欠損群0.46±0.13 vs. 0.82±0.04であった. 肝/心カウント比は, 不一致群が2.07±0.49と正常群1.14±0.15, 一致欠損群1.45±0.39に比べ有意に高値であった. 不一致群は, 定量的にも下壁欠損の不一致所見を呈し, 肝/心カウント比が高値を示した. 肝/心カウント比が高い症例では, SPECT像による下壁欠損の判定に注意が必要であり, planar像を併用した読影が望ましいと考えられた. |
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| Practice | 臨床医学：一般 |
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| Keywords | 123I-metaiodobenzylguanidine (MIBG), Inferior myocardial defect, Liver uptake, SPECT, Vanishing liver position |
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| English |
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| Title | Comparison of Inferior Myocardial Defect between Planar and SPECT Image of 123I-Metaiodobenzylguanidine Cardiac Scintigraphy |
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| Authors | Hideki KOBAYASHI*, Mitsuru MOMOSE*, Kenichi KASHIKURA*, Nobusuke MATSUMOTO*, Katsumi SAITO**, Ryuta ASANO**, Saichi HOSODA**, Kiyoko KUSAKABE* |
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| Authors(kana) | |
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| Organization | *Department of Radiology, **Department of Cardiology, Tokyo Women's Medical College Hospital |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 32 |
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| Number | 2 |
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| Page | 205-209 |
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| Year/Month | 1995/2 |
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| Article | Report |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | [Summary] Discordant findings of inferior MIBG defect between SPECT and planar images were sometimes observed in the clinical studies. In this study, we compared inferior myocardial findings between planar and SPECT image of 123I-metaiodobenzyl-guanidine (MIBG) cardiac scintigraphy in 29 patients. All patients were estimated as normal in anterior accumulation of MIBG. The patients were divided into 3 groups according to the visual finding of inferior defect in the planar and SPECT image ; normal group (normal inferior accumulation of MIBG both in the planar and SPECT image, N=10), discordance group (inferior MIBG defect was only observed in the SPECT image, but was not observed in the planar image, N=7), inferior defect group (inferior MIBG defect was observed both in the planar and SPECT image, N=12). Inferior/anterior count ratio of SPECT and planar image were 0.96+-0.11 vs. 0.97+-0.05 in normal group, 0.59+-0.21 vs. 0.99+-0.13 in discordance group, 0.46+-0.13 vs. 0.82+-0.04 in inferior defect group. Liver/heart count ratio was significantly higher in the discordance group (2.07+-0.49) than that in the normal (1.14+-0.15) and inferior defect group (1.45+-0.39). In phantom study, it has been reported that increased liver accumulation of MIBG causes artifactual inferior defect adjacent to the liver. These data indicate that increased liver/heart count ratio may cause artifactual inferior defect on MIBG SPECT image in the clinical studies. Planar image evaluation may be helpful to distinct the artifactual infarior defect on SPECT image. |
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| Practice | Clinical medicine |
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| Keywords | 123I-metaiodobenzylguanidine (MIBG), Inferior myocardial defect, Liver uptake, SPECT, Vanishing liver position |
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