Native cardiac T1 Mapping: Standardized inline analysis of long and short axis at three identical 1.5 Tesla MRI scanners

Highlights: • High reproducibility of native cardiac T1 mapping independently of the heart segment. • Limited comparability between corresponding short and long axis segments. • To get reliable results multiple planes and axis should be acquired. • Follow-up examinations should be measured in identical segments. - Abstract: BackgroundInterpretation of native T1 time values remains difficult due to limited hard- and software comparability and the lack of measurement recommendations for the number of slices and their orientation. To provide a standardized comparison of native T1 time values in short and long axis and to investigate the interscanner reproducibility.