Table 1.

Mean Root Square Error (MRSE)^a

Motion case	Correction method
	Rigid body	Rigid body with sensitivity correction
First identical position case		1.94 ± 0.48%
Second identical position case	7.54 ± 1.39%	7.31 ± 1.41%
First inter‐scan motion case	14.79 ± 5.33%	6.10 ± 1.78%
Second inter‐scan motion case	17.45 ± 9.73%	6.18 ± 0.76%

^aMRSE was measured against R1₁, the R1_RB map of the first identical‐position case for all estimations of R1 using both correction methods (mean±SD across the group). MRSE for rigid body corrected interscan motion cases was twice the scan‐rescan variability (defined as the MRSE of the second identical motion case). Additional receive sensitivity correction reduced MRSE below the level of scan–rescan variability.