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不同方法测量膈肌运动对胸腹部肿瘤放射治疗靶区位移影响的误差比较 被引量:3

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摘要 目的比较并分析X线模拟机、B超、计算机断层扫描仪(computer tomography,CT)、磁共振成像(magnetic resonance imaging,MRI)四种方法测量自由呼吸状态下膈肌的运动范围,旨在精确确定胸腹部肿瘤适形放射治疗计划靶区(planning tumor volume,PTV)范围。方法选取10名正常健康受试者,男∶女=1∶1,平均年龄51岁,先后以X线模拟定位机,CT,MRI,B超四种测量方法测量膈肌长径方向运动范围。X线模拟机和B超采用直视下测量并记录数据,CT,MRI采用Photoshop5.0软件叠加图像并计算膈肌运动范围。对4组数据进行分析处理。结果X线模拟机、B超、CT、MRI测量的四组数据中,X线模拟机测量膈肌运动平均值最大(15.4mm),CT测量的平均值最小(8.0mm),B超和MRI之间平均值相似(11.7mm和11.6mm),B超和MRI测量膈肌运动度差异无显著性(P>0.05),X线模拟机(或CT)测量膈肌运动范围与其他三者差异均有显著性(P<0.05)。结论对胸腹部肿瘤放疗患者,个体化考虑呼吸运动影响决定PTV范围和治疗计划是非常必要的。B超经济实用,简单快捷,又是临床工作中最常用的影像学工具之一,可以作为临床检查呼吸运动范围常规。
出处 《广东医学》 CAS CSCD 北大核心 2007年第6期910-912,共3页 Guangdong Medical Journal
基金 广东省自然科学基金重点项目(编号:013056)
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共引文献38

同被引文献32

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