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KMID : 1103720120670020129
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Journal of the Korean Society of Radiology
2012 Volume.67 No. 2 p.129 ~ p.134
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The Survey of Magnetic Resonance Imaging Quality according to Magnetic Field Strength in Korea
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Cho Hyun-Hae
Paik Sang-Hyun
Hwang Ji-Young
Choi Won-Chan
Shim Jong-Hoon
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Abstract
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Purpose: The purpose of this study is to survey the MRI used in Korea according to the magnetic field strength (MFS), in order to evaluate the failure rate of the MRI quality assurance test, and to analyze the scores of the subsection for phantom and clinical image tests according to MFS.
Materials and Methods : For quality assurance test in Korea from Jan 2009 to Dec 2009, 279 MRI were included in this study. The number of MRI was based according to MFS, the type of hospital, production year, and whether or not new or used equipment was from the Korea Institute Accreditation of Medical Image database. The rates of failure in the phantom/clinical image test along with the scores of the subsection, according to MFS, were analyzed.
Results: In this study, there were 78 low MFS MRI out of the 279 (28%) MRI. According to MFS, the rate of failure in high contrast spatial resolution of the phantom test was not different. The rate of failure and mean scores in the low contrast object detectability of the phantom test and the mean scores of the brain clinical image test were significantly different according to MFS.
Conclusion: The low MFS MRI is constantly being spread due to used equipment in medical facilities. Quality control of low MFS MRI can be important because less than 1 T MRI received significantly lower scores in both phantom and brain clinical image tests.
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KEYWORD
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MRI, Magnetic Field Strength, Quality Control, Phantom Test, Clinical Image Test
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