Table 2. Internal test results for the bone suppression methods used in this study.

Bone suppression method	PSNR (higher is better, mean ± SD)	SSIM (higher is better, mean ± SD)	RMSE (lower is better, mean ± SD)
None	32.9±3.0	0.982±0.005	0.024±0.010
Gusarev	33.8±2.9	0.984±0.004	0.022±0.010
Rajaraman	34.0±3.7	0.986±0.004	0.021±0.010

PSNR, peak signal-to-noise ratio; SD, standard deviation; SSIM, structural similarity index measure; RMSE, root-mean-squared error.