Koller C J, Eatough J P, Mountford P J, Frain G
Medical Physics Directorate, University Hospital of North Staffordshire, Princes Road, Hartshill, Stoke on Trent ST4 7LN, UK.
Br J Radiol. 2006 Jul;79(943):592-6. doi: 10.1259/bjr/67655734.
There are currently no national guidelines on appropriate quality assurance (QA) test frequencies for MRI equipment in clinical use. From a random selection of 45 hospitals in England, who were contacted by phone, 35 hospitals agreed to participate in a survey of MRI QA and were sent a questionnaire requesting information on the range and frequency of QA tests, as well as the staff groups who conduct these tests. Twenty-four completed replies were received, representing a 68% response rate from the distributed questionnaires. Of these, 79% undertook some form of QA, typically conducted by the radiographic staff. Tests were most often undertaken on the head coil, but there was a considerable variation in the frequency and range of tests undertaken at different hospitals. For example, exactly half of the respondents conducted signal to noise ratio (SNR) tests on both head and body coils, but only 13% of centres extended this test to other coils. Results from this survey should inform radiology departments regarding practice at other hospitals and should assist in formulating the frequency and scope of appropriate MRI QA programmes.
目前尚无关于临床使用的MRI设备适当质量保证（QA）测试频率的国家指南。从随机挑选的45家英格兰医院中，通过电话联系，35家医院同意参与MRI QA调查，并收到一份问卷，要求提供QA测试的范围和频率以及进行这些测试的工作人员群体的信息。收到24份完整回复，占分发问卷的68%回复率。其中，79%进行了某种形式的QA，通常由放射科工作人员进行。测试最常在头部线圈上进行，但不同医院进行测试的频率和范围存在相当大的差异。例如，恰好一半的受访者对头线圈和体线圈都进行了信噪比（SNR）测试，但只有13%的中心将此测试扩展到其他线圈。本次调查结果应告知放射科有关其他医院的做法，并应有助于制定适当的MRI QA计划的频率和范围。
