Eveliina Lammentausta1, Juhani Multanen2, Miika T. Nieminen1,3
1Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland; 2Department of Health Sciences, University of Jyvskyl, Jyvskyl, Finland; 3Department of Radiology, University of Oulu, Oulu, Finland
To compare T2 results obtained from different scanners, the variability of relaxation times from scanners within and across manufacturers has to be known. In this study, T2 measurements of phantoms and human knee cartilage were compared between two scanner manufacturers and within three scanners from one manufacturer. Additionally, T1 of the phantom was measured. Significant variation in phantom T2 and T1 values were observed across scanner manufacturers. T2 measurements showed significant differences between scanner manufacturers, however, T2s within scanners from one manufacturer were similar. The differences are likely due to different features of the pulse sequences.