在体肝脏3.0T1H-MR波谱匀场及抑水影响因素探讨 |
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引用本文: | 梁长虹,徐莉,刘再毅,崔燕海,刘春玲,郑君惠,曾琼新. 在体肝脏3.0T1H-MR波谱匀场及抑水影响因素探讨[J]. 中华放射学杂志, 2008, 43(1): 739-742. DOI: 10.3760/cma.j.issn.1005-1201.2009.07.019 |
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作者姓名: | 梁长虹 徐莉 刘再毅 崔燕海 刘春玲 郑君惠 曾琼新 |
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作者单位: | 广东省人民医院放射科广东省医学科学院南方医科大学附属华南医院,广州,510080; |
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基金项目: | 广东省自然科学基金资助项目广东省科技计划资助项目广东省医学科学技术研究基金资助项目国家自然科学基金项目资助- |
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摘 要: | Objective To characterize the clinical factors which influence water suppression and auto-shimming line width for liver 3.0 T 1H-MRS.Methods Fifty-seven cases with liver 1H-MR spectroscopy(1H-MRS) were retrospectively studied, including chronic type B hepatitis (n=5), fatty liver (n=14), chronic type B hepatitis combining fatty liver (n=3) and normal situation (n=35).Independent t test was used to characterize the difference of general condition (height, weight, body mass index etc.) between different water suppression effect groups and between different shimming effect groups.Using Chi-square test to analyze whether water suppression rate and auto-shimming line width between fatty liver groups and non-fatty liver exist significance difference .Results By comparing WS ≥90% (n=47)group with WS < 90% (n=10) group, the former showed smaller average height[(164.7±8.0) and (170.5±3.7) cm respectively], weight[(61.8±10.4) and (73.4±5.4) kg respectively], BMI [(22.7±3.2) and (25.2±1.3)kg/m2 respectively]and LW[(17.7±3.7)and(24.6±6.3) Hz respectively]than the latter (t=-3.488,-3.415,-4.002 and-3.327, P < 0.05).By comparing LW 20 Hz (n=41) group with LW 20 Hz (n=16) group, the former showed better water suppression rate [(93.0±2.7)% and (86.1±8.5)% respectively]than the latter(t=3.213,P <0.05), whereas larger weight[(62.2±11.6) and (68.1±6.1)kg respectively]and BMI[(22.8±3.4) and (24.2±1.9)kg/m2 respectively](t=-2.516,-2.024,P <0.05).LW≤20 Hz in the fatty liver and non-fatty liver group was 7/17 and 34/40, respectively (X2=11.347, P < 0.05).WS < 90% in the fatty liver and non-fatty liver group was 10/17 and 0/44, respectively (X2=28.536, P < 0.05) .Conclusion Hepatic steatosis exerts an adverse effect in water suppression and shimming.
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关 键 词: | 肝 脂肪肝 磁共振波谱学 |
Exploration of factors influencing shimming and water suppression on hepatic 1H-MR spectroscopy in vivo on 3.0 T |
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Keywords: | LiverFatty liverMagnetic resonance spectroscopy |
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