TABLE 5.

Quantitative comparison between our method and two other unsupervised harmonization methods in ADNI traveling subjects cohort.

	1.5 T → 3 T			3 T → 1.5 T
	IIC	SSIM	PSNR	IIC	SSIM	PSNR
Original	$0.931\pm 0.027$	$0.855\pm 0.023$	$23.172\pm 0.983$	$0.931\pm 0.027$	$0.855\pm 0.023$	$23.172\pm 0.983$
cycleGAN	$0.954\pm 0.027$	$0.901\pm 0.031$	$25.566\pm 1.076$	$0.957\pm 0.025$	$0.905\pm 0.019$	$25.109\pm 1.248$
starGAN	$0.948\pm 0.021$	$0.908\pm 0.021$	$25.331\pm 1.145$	$0.955\pm 0.023$	$0.909\pm 0.028$	$25.482\pm 1.379$
Ours	$0.966\pm 0.014$	$0.922\pm 0.018$	$26.189\pm 0.909$	$0.971\pm 0.018$	$0.935\pm 0.024$	$26.015\pm 1.182$

Abbreviations: ADNI, Alzheimer's Disease Neuroimaging Initiative; GAN, generative adversarial network; IIC, image intensity correlation; PSNR, peak signal‐to‐noise ratio; SSIM, structural similarity index.