不同MR设备在肝脏体素内不相干运动图像质量和参数值的一致性研究  

Study on consistency of IVIM image quality and parameter values of different MR equipment in liver

作　　者：齐晓辉[1] 王琦[1] 时高峰[1] 贾丽涛[1] 王亚宁[1] 潘江洋[1] 谢巧 QI Xiaohui;WANG Qi;SHI Gaofeng;JIA Litao;WANG Yaning;PAN Jiang yang;XIE Qiao(CT/MR Room,No.4 Hospital of Hebei Medical University,Shijiazhuang 050011,China)

机构地区：[1]河北医科大学第四医院CT/MR室,河北石家庄050011

出　　处：《实用放射学杂志》2023年第3期474-478,共5页Journal of Practical Radiology

摘　　要：目的探讨不同MR设备对肝脏组织体素内不相干运动(IVIM)图像质量和参数值的一致性。方法招募30例志愿者采用随机化原则分别用Siemens Skyra 3.0T(A),Philips Ingenia CX 3.0T(B)和United imaging UMR 7803.0T(C)MR进行扫描。IVIM序列选取0、10、20、30、40、60、80、100、200、500、800、1200 s/mm^(2)共12个b值。对不同设备间图像质量、肝右叶及左叶肝实质表观扩散系数(ADC)值(b值为0 s/mm^(2)和1200 s/mm^(2))、真扩散系数(D)值、假扩散系数(D^(*))值及灌注分数(f)值进行测量并进行统计学分析。结果不同设备间图像质量主观评分观察者间一致性好(Kappa=0.78),3种设备主观评分无统计学差异(P=1.00)。B和C图像信噪比(SNR)无统计学差异(P=0.11),A与B、A与C图像SNR有统计学差异(P=0.01,P=0.00)。观察者内及观察者间对不同设备间IVIM参数值和ADC值测量结果有较高的一致性[组内相关系数(ICC)=0.962和0.782]。对于不同设备间肝脏组织的IVIM参数值和ADC值比较结果显示,A和C间D值、A和B间f值及ADC、B和C间肝右叶D^(*)值、3种设备间肝左叶D^(*)值间差异无统计学意义(P>0.05),一致性相对较好,其余设备间参数值均有统计学差异,一致性差。结论肝脏IVIM扫描在不同MR设备的图像质量、IVIM参数值和ADC值的可重复性较好,但不同设备间参数值的一致性差异较大。Objective To investigate the consistency of intravoxel incoherent motion(IVIM)image quality and parameter values of liver tissue with different MR equipment.Methods Thirty volunteers were randomly assigned to receive Siemens Skyra 3.0T(A),Philips Ingenia CX 3.0T(B),and United imaging UMR 7803.0T(C)MR.The IVIM selected 12 b values of 0,10,20,30,40,60,80,100,200,500,800,1200 s/mm^(2).Subj ective evaluation of image quality,liver parenchymal apparent diffusion coefficient(ADC)values(b:0 s/mm^(2) and 1200 s/mm^(2)),D,D^(*),and f values of different equipment were measured and statistically ana-lyzed.Results The consistency of the subj ective image quality score among different equipment were good(Ka p pa=0.78),and there was no statistical difference in subj ective score among three equipment(P=1.00).Signal-to-noise ratio(SNR)of B,C had no statistical difference(P=0.11),SNR of A and B,A and C had statistical differences(P=0.01,P=0.00).The intra-observer and inter-observer measurements of IVIM parameter and ADC values between different equipment had high consistency[intraclass cor-relation coefficient(ICC)=0.962 and 0.782].Comparison of IVIM parameter value and ADC value for liver tissue between different equipment showed there was no statistical difference in D value between A and C,f value and ADC value between A and B,live right leaves D^(*)value between B and C,and live left leaves D^(*)value between the three equipment(P>0.05),there were better consis-tency,but other parameters were statistically differents.Consistency was poor.Conclusion The image quality,repeatability of IVIM parameter values,and ADC values obtained by IVIM scanning of the liver on different MR equipment are good,but the consis-tency of parameter values varies greatly between different equipment.

关 键 词：不同MR设备 肝脏 体素内不相干运动 图像质量 表观扩散系数 

分 类 号：R445.2[医药卫生—影像医学与核医学] R322.47[医药卫生—诊断学] R814.49[医药卫生—临床医学]