中国医学科学院学报

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中国医学科学院学报

中国医学科学院学报 ›› 2020, Vol. 42 ›› Issue (6): 776-780.doi: 10.3881/j.issn.1000-503X.11915

• 论著 • 上一篇    下一篇

基于碘浓度值评估肾脏光谱CT增强皮质期不同单能级图像

孟庆林,宗林雄,刘梦琦,王平怀,陈志晔()   

  1. 中国人民解放军总医院海南医院放射科,海南三亚 572013
  • 收稿日期:2019-08-21 出版日期:2020-12-30 发布日期:2021-01-11
  • 通讯作者: 陈志晔 E-mail:yyqf@hotmail.com

Optimal Mono-energy in Mono-energetic Spectral Computed Tomography of Enhanced Renal Cortex in Cortical Phase Based on Iodine Concentration

MENG Qinglin,ZONG Linxiong,LIU Mengqi,WANG Pinghuai,CHEN Zhiye()   

  1. Department of Radiology,Hainan Hospital of Chinese PLA General Hospital,Sanya,Hainan 572013,China
  • Received:2019-08-21 Online:2020-12-30 Published:2021-01-11
  • Contact: CHEN Zhiye E-mail:yyqf@hotmail.com

摘要:

目的 采用碘浓度值评估肾脏光谱CT增强皮质期不同单能级图像以确定最佳单能级。方法 回顾性分析50例肾功能正常并行腹部光谱CT增强检查的患者,对皮质期图像行碘浓度值及不同光谱单能级图像CT值测量,并分析其相关性及CT值变异系数。结果 相关性分析提示皮质期肾皮质在40、50、60、70、80、90及100 keV能级CT值与碘浓度值相关系数分别为0.994、0.994、0.993、0.987、0.976、0.960及0.938(P均<0.001)。相关系数比较显示40、50 keV能级(P=0.007)及60 keV能级(P=0.030)相关系数均显著大于70 keV能级相关系数,40、50 keV能级与60 keV能级相关系数之间差异无统计学意义(P =0.590)。肾皮质CT值在40、50、60 keV能级的变异系数分别为0.21、0.20及0.19。结论 60 keV是肾皮质光谱CT增强扫描皮质期最佳单能级。

关键词: 肾脏, 光谱CT, 单能级, 碘浓度

Abstract:

Objective To identify the optimal mono-energetic enhanced spectral CT for renal cortex in cortical phase based on the iodine concentration. Methods Fifty patients with normal renal function received the abdominal enhanced spectral CT examination.The iodine concentration and CT values of the multiple mono-energetic spectral images were measured on renal cortex in cortical phase,and the correlation between the iodine concentration and the CT values and the coefficient of variation(CV)were analyzed. Results The correlation analysis demonstrated that the correlation coefficient was 0.994,0.994,0.993,0.987,0.976,0.960,and 0.938 between mono-energetic spectral CT images(40-100 keV with interval 10 keV,respectively)and iodine concentration(all P <0.001).The correlation coefficients of 40 keV,50 keV(P=0.007)and 60 keV(P=0.030)were significantly higher compared with that of 70 keV,and the correlation coefficients were not significantly among 40 keV,50 keV and 60 keV(P =0.590).The CV of renal cortex in cortical phase was 0.21,0.20,and 0.19 for 40 keV,50 keV,and 60 keV,respectively. Conclusion 60 keV is the optimal mono-energy for the enhanced spectral CT of the renal cortex in cortical phase.

Key words: kidney, spectral CT, mono-energy, iodine concentration

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