基于Magphan体模的磁共振成像设备低对比度分辨力的检测评价  

Detection and Evaluation of Low Contrast Resolution of Magnetic Resonance Imaging Apparatus Based on Magphan Phantom

作　　者：储呈晨 李斌[1] CHU Chengchen;LI Bin(Research Center of Hospital Management, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai, 200233)

机构地区：[1]上海交通大学附属第六人民医院医院管理研究中心

出　　处：《中国医疗器械杂志》2019年第2期140-142,共3页Chinese Journal of Medical Instrumentation

基　　金：国家重点研发项目(2016YFC0106803);上海市第六人民医院院级管理研究基金(lygl201705)

摘　　要：目的在标准水模基础上建立低对比度分辨率的基线值,并监测系统成像性能的稳定性,及时发现漂移并校正,充分发挥设备的性能。方法针对低对比度分辨力通用测试评价方法不适用于长期监测设备性能变化的特点,提出了将统计学原理中的t检验方法融入到低对比度分辨力的测试评价中。结果通过分析评价标准水模图像低对比度分辨力的测试结果,并验证评价方法的正确性,从而根据正确的测试方法,以检验统计量值作为MRI设备低对比分辨力值,以测试区域的t界值作为低对比度分辨力的基线值,建立长期稳定的质量保证体系。结论在此Magphan标准水模上对低对比分辨力进行测试,数据符合实际经验,并验证得到了该指标的测试方法。可在基于体模的低对比分辨力的检测与评价方法的基础上建立指标的基线值,从而保障系统成像性能的稳定性。Objective Based on the Magphan phantom, a baseline value of low contrast resolution was established, and the stability of the imaging performance of the system was monitored. Drift and correction were found in time to give full play to the performance of the device. Methods The general test evaluation method for low-contrast resolution was not suitable for the characteristics of long-term monitoring equipment performance changes, and the test evaluation of low-contrast resolution that incorporates the t-test method in statistical principle was proposed. Results By analyzing and evaluating the test results of the low contrast resolution of the standard water model image, and verifying the correctness of the evaluation method, according to the correct test method, the test statistic value was used as the low contrast resolution value of the MRI equipment to test the t boundary of the region. The value was used as a baseline value for low contrast resolution to establish a long-term stable quality assurance system. Conclusion In this paper, the data of the low contrast resolution test on Magphan phantom was in line with practical experience, therefore the test method of low contrast resolution was verified. The baseline value of the indicator can be established based on the detection and evaluation method of low contrast resolution based on phantom, then to ensure the stability of the imaging performance of the system.

关 键 词：磁共振成像系统 Magphan体模 低对比度分辨力 

分 类 号：R197.39[医药卫生—卫生事业管理]