个性化能谱协议在上腹部CT扫描中的应用

发布时间：2018-04-27 23:00

本文选题：腹部 + 体层摄影术　；参考：《中国医学影像学杂志》2015年12期

【摘要】：目的通过优化选择能谱扫描协议,与常规120 k Vp扫描图像质量及辐射剂量进行对比,探讨个性化能谱扫描在上腹部常规临床应用的可行性。资料与方法前瞻性收集行上腹部CT平扫加增强扫描的60例患者,将其随机分为A组和B组,每组30例。A组行常规120 k Vp平扫加能谱增强扫描,B组行能谱平扫加120 k Vp增强扫描。能谱扫描协议根据患者常规120 k Vp、NI10-5 mm的平均毫安秒进行个性化选择,重建平扫和门静脉期120 k Vp或70 ke V序列图像。比较两组平扫和门静脉期CT容积剂量指数(CTDIvol)、有效剂量(ED),以及肝实质、脾实质、门静脉主干的标准差(SD)、信噪比(SNR)和对比噪声比(CNR)。结果 A组GSI门静脉期扫描的CTDIvol、ED小于120 k Vp平扫(P0.05)。B组GSI平扫的CTDIvol、ED小于120 k Vp门静脉期扫描(P0.05)。B组GSI平扫的CTDIvol、ED小于A组120 k Vp平扫,A组GSI门静脉期扫描的CTDIvol、ED小于B组120 k Vp门静脉期扫描,差异均无统计学意义(P0.05)。B组GSI平扫在肝实质、脾实质和门静脉主干的SD均小于A组120 k Vp扫描(P0.05),SNR均大于A组120 k Vp扫描(P0.05);A组GSI门静脉期扫描,在肝实质、脾实质和门静脉主干的SD均小于B组120 k Vp门静脉期扫描(P0.05)。结论优化后的个性化能谱扫描协议,辐射剂量略有减少,且能谱单能量图像质量的SNR、CNR优于或等于常规120 k Vp扫描图像,并可提供多参数诊断及多应用平台,可在上腹部扫描中常规应用。
[Abstract]:Objective to explore the feasibility of individualized energy spectrum scanning in the upper abdomen by optimizing the energy spectrum scanning protocol and comparing it with the conventional 120 kV P scan image quality and radiation dose. Materials and methods Sixty patients with upper abdominal CT plain scan and enhanced scan were randomly divided into group A and group B. each group (30 cases) received routine 120 kV P plain scan plus enhanced energy spectrum scan. Group B received energy spectrum plain scan plus 120 kV P enhancement scan. The patients in group B were divided into two groups: group A (n = 30) and group B (n = 30). The EDS protocol was selected according to the average millisecond of 120 kV / Ni ~ (-10 ~ (-5) mm) for reconstruction of 120 kV p or 70 ke V sequence images of portal vein phase and plain scan. The CT volume dose index (CTDIvoll), the effective dose (EDV), the standard deviation (SDN) of hepatic parenchyma, splenic parenchyma and portal vein trunk were compared between the two groups. Results the CTDIvoled of GSI portal phase scan in group A was less than 120kV p plain scan P0.05n. The CTDIvoline Ed of GSI plain scan was less than 120kV p portal phase scan P0.05N. B group GSI plain scan was smaller than A group 120k VP plain scan group GSI portal vein phase CT DIvoled Ed was smaller than B group GSI portal vein phase scan CT DIvoled Ed was less than B group. 120 k VP portal phase scan, The SD of splenic parenchyma and portal vein trunk in group B was lower than that in group A (P 0.05 V p scan), and the difference was higher than that in group A (P 0.05 V p scan), and in hepatic parenchyma, there was no significant difference between group A and group A (P 0.05 vs. B) in the hepatic parenchyma, there was no significant difference between group A and group A (P 0.05 vs. B). The SD of splenic parenchyma and main portal vein was less than that of group B (120 kV vs. P 0.05). Conclusion the optimized personalized energy spectrum scanning protocol can reduce the radiation dose slightly, and the SNRCNR with single energy spectrum image quality is superior to or equal to the conventional 120kV scan image, and can provide multi-parameter diagnosis and multi-application platform. It can be used in epigastric scanning.
【作者单位】：陕西中医药大学附属医院影像科;
【分类号】：R816.5

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