Journal List > J Korean Soc Radiol > v.67(2) > 1087148

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Cho, Paik, Hwang, Choi, and Shim: The Survey of Magnetic Resonance Imaging Quality according to Magnetic Field Strength in Korea
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Journal of the Korean Society of Radiology

Journal of the Korean Society of Radiology 2012; 67(2): 129-134.

Published online: 7 August 2012

DOI: https://doi.org/10.0000/jksr.2012.67.2.129

The Survey of Magnetic Resonance Imaging Quality according to Magnetic Field Strength in Korea

Hyun-Hae Cho, MD2, Sang Hyun Paik, MD1, 3, Ji Young Hwang, MD1, 2, Won-Chan Choi, MS1, Jong Hoon Shim, BS1

1Korea Institute Accreditation of Medical Image, Seoul, Korea.

2Department of Radiology, School of Medicine, Ewha Womans University, Mokdong Hospital, Seoul, Korea.

3Department of Radiology, Soonchunhyang University College of Medicine, Bucheon Hospital, Bucheon, Korea.

Corresponding author: Sang Hyun Paik, MD. Department of Radiology, Soonchunhyang University College of Medicine, Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon 420-767, Korea. Tel. 82-32-621-5851, Fax. 82-32-621-5874, radpsh@schmc.ac.kr

Received 24 April 2012       Accepted 23 June 2012

Copyright © 2012 The Korean Society of Radiology

Abstract

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.

Keywords: MRI, Magnetic Field Strength, Quality Control, Phantom Test, Clinical Image Test

References

1. Korea Institute Accreditation of Medical Image. Annual Report 2011. 2011. Seoul: KIAMI.
2. Ministry of Health and Welfare. Act on registration and operation of special medical instruments. 2003. Seoul: Ministry of Health and Welfare.
3. Lee JW, Ahn KJ, Lee SK, Na DG, Oh CH, Chang YM, et al. Usefulness of ACR MRI phantom for quality assurance of MRI instruments. J Korean Radiol Soc. 2006. 54:47–55.
4. Chung TS. Development of criteria for MRI quality assessment. 2002. Seoul: Korea Food and Drug Administration.
5. American College of Radiology. MRI quality control manual. 2004. Reston: American College of Radiology.
6. American College of Radiology. Phantom test guidance for the ACR MRI accreditation program. 2000. Reston: American College of Radiology.
7. Choi JI, Na DG, Kim HH, Shin YM, Ahn KJ, Lee JY. Quality control of medical imaging. J Korean Radiol Soc. 2004. 50:317–331.
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