Comparison of deep learning-based denoising methods in cardiac SPECT

EJNMMI Physics

Table 3 Structural similarity index measure (mean ± standard deviation) of myocardium area for different methods and acquisition times at stress

Acquisition time	Method
	SSIM
	p value versus reduced time OSEM
	OSEM	CNN	RES	UNET	cGAN
Half	0.964 ± 0.015	0.944 ± 0.020	0.948 ± 0.020	0.952 ± 0.017	0.923 ± 0.052
		0.0019	0.0037	0.0060	0.0389
Quarter	0.909 ± 0.025	0.911 ± 0.027	0.912 ± 0.025	0.915 ± 0.024	0.890 ± 0.036
		0.7755	0.6148	0.3348	0.1058