【摘 要】
：
目的：通过对比能谱CT不同单能量值图像在对比剂分次团注单期CTU中肾实质及集合系统的图像质量以评价单能量技术在对比剂分次团注单期CTU中的应用价值.方法：前瞻性的收集因“腰痛、血尿”欲行CTU的患者22例,采用虚拟平扫结合个性化的对比剂分次团注单期能谱CTU扫描方案；将所得扫描数据采用1.25mm层厚、并选择80％自适应迭代(adaptive statistical iterative recon
【机 构】
：
成都中医药大学附属医院放射科 四川成都610075 成都中医药大学附属医院,610072
【出 处】
：
中国中西医结合学会医学影像专业委员会第十五次全国学术大会暨上海市中西医结合学会医学影像专业委员会2017年学术年会
论文部分内容阅读
目的：通过对比能谱CT不同单能量值图像在对比剂分次团注单期CTU中肾实质及集合系统的图像质量以评价单能量技术在对比剂分次团注单期CTU中的应用价值.方法：前瞻性的收集因“腰痛、血尿”欲行CTU的患者22例,采用虚拟平扫结合个性化的对比剂分次团注单期能谱CTU扫描方案；将所得扫描数据采用1.25mm层厚、并选择80％自适应迭代(adaptive statistical iterative reconstruction,ASIR)进行薄层重建,然后传入GEADW4.6工作站运用单能量技术分别重建出40-140keV间单能量图像(每间隔10keV-组,共11组图像)；由2名主治医师按照统一标准以5分制分别对各单能量组及120kvp混合能量组肾实质的图像质量进行评分,并选择评分最高的三组单能量图像与混合能量图像分别测量计算出其集合系统各节段的平均对比噪声比(Contrast-to-noise ratio,CNR),并在工作站上分别将上述四组图像进行最大密度投影(maximum intensity projection,MIP)、多平面重组(multiple planar reformation,MPR)、曲面重建(curved planar reformation,CPR)及容积再现(volume rendering,VR)重建,采用5分制分别对四组重建图像间尿路解剖结构显示情况进行评分.
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