In-vivo right-ventricular myocardial T1 mapping at 3.0 Tesla

This abstract provides information on T1 mapping in the right ventricle (RV) for MR scientists and cardiac radiologists. Certain diseases such as arrhythmogenic right ventricular dysplasia (ARVD) affect predominantly the RV myocardium, however, its T1 quantification has been neglected so far, because the RV myocardium has a very thin and variable structure. Our goal was to show its feasibility at high-resolution. 6 healthy volunteers were investigated with a 3 T Siemens Skyra with a 5(3)3 MOLLI sequence and b-SSFP readout. Images were prospectively ECG triggered at systole instead of diastole, which lead to a larger RV ROI size. A spatial resolution of 1.17x1.17x5 mm could be achieved. T1 times in the RV were found to be 1,35420 ms, LV T1 times were 1,22337 ms. The significantly higher T1 time of the RV is likely to be explained by the higher collagen content of the RV. In conclusion, RV T1 mapping with the MOLLI sequence provides robust, high-resolution results at 3 T in short acquisition times and could therefore be included in clinical routine in the near future.

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