不同型号MRI设备图像质量比较与影响因素分析

Comparison of Image Quality of Different MRI Devices and Analysis of Influencing Factors

目的比较各场强下不同型号MRI设备的图像质量,并探讨其影响因素。资料与方法采用多阶段抽样方法,抽取不同地区不同医院级别共34种型号的18 598份图像为研究资料,由5名磁共振专家对图像质量进行评价;比较各场强下不同型号的图像质量,探讨图像质量的影响因素。结果①≤0.5T场强时,日立Hitachi和西门子~#MAGNETOM C!设备的图像质量最高;1.5T场强时,GE Signa HD和西门子~#MAGNETOM Aera设备的图像质量最高;3.0T场强时,西门子~#MAGNETOM Prisma、~#MAGNETOMTrioATimSystem、~#MAGNETOMSkyra以及飞利浦Ingenia设备的图像质量最高。②多因素Logistic回归分析结果显示,进口设备图像质量诊断率高于国产设备(OR=4.56, 95%CI 4.17~4.98);1.5T和3.0T场强设备图像质量诊断率高于0.5T场强设备(OR=2.13,95%CI 1.78~2.55;OR=2.92,95%CI 2.40~3.56)。结论各场强下图像质量最优的MRI设备型号均为进口设备,进口和国产设备是图像质量的重要影响因素,其次是场强,医院级别、地区、检测部位也略有影响。

Purpose To compare the image quality of different types of MRI equipment under each field strengths, and to explore the influencing factors. Materials and Methods A multi-stage sampling method was used to extract 18 598 images of 34 models in different hospitals and regions as research data. The image quality was evaluated by 5 magnetic resonance experts. Different models of images under each field strengths were compared, and the influencing factors of image quality were explored. Results(1) When ≤0.5 T field strength, the devices of Hitachi and Siemens ~#MAGNETOM C! had the highest image quality. When 1.5 T field strength, the devices of GE Signa HD and Siemens ~#MAGNETOM Aera had the highest image quality. When 3.0 T field strength, the devices of Siemens ~#MAGNETOM Prisma, ~#MAGNETOM Trio A Tim System, ~#MAGNETOM Skyra and Philips Ingenia had the highest image quality.(2) Multivariate Logistic regression analysis showed that the image quality diagnosis rate of imported equipment was higher than that of domestic equipment(OR=4.56, 95% CI 4.17-4.98);the image quality diagnosis rates of 1.5 T and 3.0 T field strength equipment were higher than that of 0.5 T field strength equipment(OR=2.13, 95% CI 1.78-2.55;OR=2.92, 95% CI 2.40-3.56). Conclusion The model of MRI equipment with the best image quality in each field is imported equipment. Imported and domestic equipment are important factors in image quality, followed by field strength, and the hospital level, region and test site also have slight impact.