Quality Assurance of Clinical MRI Scanners Using ACR MRI Phantom: Preliminary Results
- 727 Downloads
Clinical magnetic resonance imaging (MRI) scanners play an important role in the diagnosis of diseases and management of patient treatment. Quality assurance (QA) of the clinical MRI scanners is mandatory to obtain optimal images in a modern hospital. In this report, the phantom test for the American College of Radiology (ACR) MRI accreditation is used as the essential part of the MRI QA protocols. Seven important assessments of MR image quality are included as follows: geometric accuracy, high-contrast resolution, slice thickness accuracy, slice position accuracy, image intensity uniformity, percent signal ghosting, and low-contrast object detectability. In addition, signal-to-noise ratio and central frequency are monitored as well. The MRI QA procedures were applied to four clinical MRI scanners in our institute twice within 3 months. According to the QA results, the service engineers were more efficient in solving scanners problems when the ACR phantom test was run.
KeywordsMRI quality assurance ACR phantom image quality
- Kjaer, L, Thomsen, C, Henriksen, O, et al. 1987Evaluation of relaxation time measurements by magnetic resonance imagingA phantom study. Acta Radiol28345351Google Scholar
- Mascaro, L, Strocchi, S, Colombo, P, et al. 1999Definition criteria for a magnetic resonance quality assurance program: multicenter studyRadiol Med (Torino)97389397Google Scholar
- Phantom test guidance for the ACR MRI accreditation program. American College of Radiology, Reston, 1998Google Scholar
- MRI quality control manual. American College of Radiology, Reston, 2000Google Scholar