Evaluation of the ACR MRI phantom for quality assurance tests of 1.5 T MRI scanners in Estonian hospitals; pp. 328–334Full article in PDF format | doi: 10.3176/proc.2014.3.06
Since its discovery, magnetic resonance imaging (MRI) has been one of the main methods of imaging in radiology. So far, there are not many national or international guidelines for MRI quality assurance compared to imaging methods that are using ionizing radiation. American College of Radiology (ACR) has an accreditation program that includes a standardized image quality measurement protocol and a phantom. Seven important assessments of MRI image quality are included with acceptance criteria. The aim of this study was to determine whether using the ACR MRI phantom would be a suitable quality assurance method for MRI systems in Estonia. In order to determine if the ACR MRI phantom would be a suitable quality assurance method for MRI systems in Estonia, six MRI scanners were tested using the ACR MRI accreditation program phantom and method. Information about the image quality was obtained and 33% of the MRI scanners passed all seven assessments. In conclusion, the ACR MRI phantom is a suitable test body for some of the MRI scanners in Estonia and should be considered to be used for regular quality testing. Due to the fact that in some cases the ACR MRI phantom did not fit into the head coil, using the ACR MRI phantom cannot be nationally required and other quality assurance phantoms should also be assessed. Adding signal-to-noise ratio assessment to seven assessment criteria, provided by ACR quality assurance manual, and developing an automated ACR quality assurance procedure would make quality assurance with ACR MRI phantom more beneficial.
1. International Electrotechnical Commission, Magnetic resonance equipment for medical imaging – Part 1: Determination of Essential Image Quality Parameters EVS-EN 62464-1:2007. Estonian Centre for Standardization, Tallinn, 2007.
2. Health Statistics and Health Research Database. Radioloogia uuringud ja protseduurid vanusrühma, teenuse osutamise viisi ja teenuse osutaja liigi järgi. The National Institute for Health Development, Estonia, 2013.
3. McRobbie, D. W., Moore, E. A., Graves, M. J., and Prince, M. R. MRI From Picture to Proton. Second edition. Cambridge University Press, New York, 2006.
4. Ihalainen, T. M., Lönnroth, N. T., Peltonen, J. I., Uusi-Simola, J. K., Timonen, M. H., Kuusela, L. J. et al. MRI quality assurance using the ACR phantom in a multi-unit imaging center. Acta Oncol., 2011, 50, 966–972.
5. Weinreb, J., Wilcox, P. A., Hayden, J., Lewis, R., and Froelich, J. ACR MRI accreditation: yesterday, today, and tomorrow. J. Am. Coll. Radiol., 2005, 2, 494–503.
6. American College of Radiology. Site Scanning Instructions for Use of the MR Phantom for the ACRTM MRI Accreditation Program, 2002. http://www.acr.org/~/ media/ACR/Documents/Accreditation/MRI/LargePhantomInstructions.pdf
7. American College of Radiology. Phantom Test Guidance, 2005. http://www.acr.org/~/media/ACR/Documents/Accreditation/MRI/LargePhantomGuidance.pdf
8. American College of Radiology. Testing Instructions, 2014. http://www.acr.org/~/media/ACR/Documents/Accreditation/MRI/TestingInstructions.pdf9. Chen, C. C., Wan, Y. L., Wai, Y. Y., and Liu, H. L. Quality assurance of clinical MRI scanners using ACR MRI phantom: preliminary results. J. Digit. Imaging, 2004, 17, 279–284.
Back to Issue