. Author manuscript; available in PMC: 2026 Oct 8.

Published in final edited form as: Med Image Anal. 2025 Oct 8;107(Pt B):103833. doi: 10.1016/j.media.2025.103833

Table 3.

For the BraTs dataset, ablation of the key components in the k-space progressive learning network.

K-space network	T2WI (4×)		T1WI (Low-field)		T2WI (4×, Low-field)
K-space network	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑	PSNR ↑	SSIM ↑
Raw input	30.04±1.51	0.748±0.034	22.27±2.08	0.226±0.020	25.39±1.15	0.217±0.017
w/o Stage 2	34.72±1.56	0.929±0.013	34.30±1.82	0.925±0.017	32.60±1.41	0.904±0.015
w/o HFE	34.48±1.60	0.945±0.008	36.13±1.98	0.951±0.010	32.78±1.59	0.925±0.010
Ours	35.45±1.60	0.957±0.008	36.68±1.87	0.956±0.009	33.37±1.45	0.937±0.026