Results from the ablation-based evaluation. T2 LR, T2 HR, and PD stand for the input low-resolution T2-weighted image, high-resolution T2-weighted ground truth image, and high-resolution reference image in proton density contrast. SR1, SR2, SR3, and SR4 indicate the results from the four ablation studies respectively. The hot maps in the bottom row show the absolute pixel-value differences between the ablation study results and the corresponding ground truth T2 weighted HR image respectively.