Fig 2.

Synthetic FLAIR (A), DL-FLAIR (B), and conventional FLAIR (C) images of a representative patient. The overall image contrast of the DL-FLAIR image is more similar to that of the conventional FLAIR image than the contrast of the synthetic FLAIR image, while preserving the lesion contrast. The NRMSE maps of synthetic FLAIR (D) and DL-FLAIR (E) images against conventional FLAIR images are also shown. The NRMSE in the intracranial tissues is much larger in the synthetic FLAIR image than in the DL-FLAIR image. Note that the parenchymal surface shows patchy high NRMSE values on the synthetic FLAIR image, which are reduced but still visible in the DL-FLAIR image.