Table S1.

Gray value differences for all 18 ROIs. For ROIs containing implants, like ROI 7 for 7th dental model cast, the gray value differences are not calculated.

Exp. No/ROIs	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	S/N ratio for ROIs 1‐9	S/N ratio for ROIs 10‐18
1	0.87	4.14	16.89	7.43	0.88	7.21		8.01	1.56	6.00	5.25	8.14	10.39	5.80	14.98	10.93	9.42	7.91	$-17.76$	$-19.30$
2		46.17	59.18		16.58	7.81	15.34	2.49	3.21	9.02	2.84	5.24	5.68	8.68	0.02	2.12	7.09	15.29	$-29.49$	$-17.56$
3	8.31	0.46	6.08	4.86	1.90	5.33	8.32	6.72	5.59	6.94	9.39	7.61	2.97	1.06	3.86	0.12	4.18	4.19	$-15.34$	$-14.51$
4	5.89	11.03	3.03	12.82	11.75	3.45	9.88	7.87	11.19	7.52	7.24	7.82	3.25	4.19	0.90	5.68	4.38	6.12	$-19.29$	$-15.05$
5	4.78	7.39	3.96	10.31	7.27	6.27	16.65	28.14	2.65	10.28	4.91	4.36	2.50	3.76	1.28	1.23	3.22	0.97	$-21.82$	$-13.10$
6	1.82	1.63	1.45	2.12	2.79	5.46	5.84	0.55	2.62	13.72	9.50	4.49	6.87	4.78	4.74	0.79	1.38	2.73	$-10.07$	$-16.49$
7	4.57	8.36	11.09	11.49	15.53	20.52		10.65	10.83	11.93	13.23	11.25	9.87	8.42	8.56	8.43	7.15	7.45	$-21.90$	$-19.82$
8		28.13	31.98		36.93	9.67	10.01	19.73	32.58	34.56	24.38	14.21	3.29	0.38	0.31	1.04	1.29	6.48	$-28.38$	$-23.57$