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Purpose: To implement and evaluate a sequential approach to obtainsemi-quantitative T1-weighted MPRAGE images, unbiased by B1 inhomogeneities at7T.  Methods: In the reference gradient echo used for normalization of the MPRAGEimage, flip angle (aGE) and acquisition voxel size (Vref) was varied tooptimize tissue contrast and acquisition time (Tacq). The finalized protocolwas implemented at three different resolutions and the reproducibility wasevaluated. Maps of T1 were derived based on the normalized MPRAGE throughforward signal modelling.  Results: A good compromise between tissue contrast and SNR was reached ataGE=3{\deg}. A reduction of the reference GE Tacq by a factor of 4, at the costof negligible bias, was obtained by increasing Vref with a factor of 8 relativethe MPRAGE resolution. The coefficient-of-variation in segmented WM was 9+/-5%after normalization, compared to 24+/-12% before. The T1 maps showed no obviousbias and had reasonable values with regard to literature, especially afteroptional B1 correction through separate flip angle mapping.  Conclusion: A non-interleaved acquisition for normalization of MPRAGE offersa simple alternative to MP2RAGE to obtain semi-quantitative purely T1-weightedimages. These images can be converted to T1 maps analogously to the establishedMP2RAGE approach. Scan time can be reduced by increasing Vref which has aminiscule effect on image quality.

Bias field correction of MPRAGE by an external reference -- The poor man's MP2RAGE