Table 2.

Dose conversion factors (ratios of total reference air kerma per seed) for various prescription depths (1–10 mm in 1 mm intervals) for ¹²⁵I (model IAI‐125A) standard Collaborative Ocular Melanoma Study (COMS) plaques, notched COMS plaques with one seed removed (Case #1) and notched COMS plaques with two seeds removed (Case #2). The data were normalized to those for a prescription depth of 5 mm

Prescription depth (mm)	Plaque size in diameter (mm)
	12	14	16	18	20	22
Standard COMS plaques
1	0.33	0.37	0.42	0.44	0.47	0.47
2	0.45	0.48	0.52	0.55	0.58	0.59
3	0.60	0.63	0.66	0.68	0.70	0.71
4	0.78	0.80	0.81	0.83	0.84	0.85
5	1.00	1.00	1.00	1.00	1.00	1.00
6	1.25	1.23	1.22	1.20	1.18	1.18
7	1.54	1.50	1.47	1.43	1.40	1.38
8	1.88	1.82	1.76	1.69	1.64	1.61
9	2.27	2.18	2.10	2.00	1.92	1.87
10	2.71	2.59	2.48	2.34	2.24	2.17
Notched COMS plaques with one seed removed (Case #1)
1	0.33	0.36	0.41	0.44	0.47	0.47
2	0.45	0.48	0.52	0.55	0.57	0.58
3	0.60	0.62	0.65	0.68	0.70	0.70
4	0.78	0.80	0.81	0.83	0.84	0.84
5	1.00	1.00	1.00	1.00	1.00	1.00
6	1.26	1.24	1.22	1.20	1.19	1.18
7	1.55	1.51	1.48	1.43	1.40	1.38
8	1.89	1.83	1.77	1.70	1.65	1.62
9	2.28	2.20	2.11	2.01	1.94	1.89
10	2.73	2.61	2.50	2.36	2.26	2.19
Notched COMS plaques with two seeds removed (Case #2)
1	Unavailable	0.36	0.41	0.43	0.46	0.46
2	Unavailable	0.48	0.52	0.55	0.57	0.57
3	Unavailable	0.62	0.65	0.67	0.69	0.70
4	Unavailable	0.80	0.81	0.83	0.84	0.84
5	Unavailable	1.00	1.00	1.00	1.00	1.00
6	Unavailable	1.24	1.22	1.20	1.19	1.18
7	Unavailable	1.51	1.47	1.43	1.40	1.39
8	Unavailable	1.83	1.77	1.70	1.65	1.62
9	Unavailable	2.19	2.11	2.01	1.94	1.89
10	Unavailable	2.60	2.49	2.36	2.26	2.20