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磁共振弥散加权成像在肝脏局灶性病变诊断中的参数选择及应用

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摘要 目的:探讨DWI在肝脏局灶性占位性病变检查中成像稳定的技术参数。方法:对30名肝脏局灶占位病变行肝脏DWI,比较不同b值、激励次数(NEX)、采集矩阵对图像质量的影响。A组b值分别取50s/mm2、500s/mm2、800s/mm2;B组激励次数分别取2、4、6;C组采集矩阵分别取128×64、128×128、128×256。结果:在3种不同扫描参数的比较中,b值为500s/mm2的图像质量较b值为50s/mm2和800s/mm2;NEX取4的图像质量优于NEX取2和6;采集矩阵为128×256的图像质量优于采集矩阵为128×64和128×128。结论:b值取500s/mm2、NEX取4和采集矩阵取128×256是DWI在肝脏局灶性占位性病变检查中较理想的扫描参数。
作者 石健
出处 《交通医学》 2009年第6期715-715,717,共2页 Medical Journal of Communications
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