Assessment of contralateral mammary gland dose in the treatment of breast cancer using accelerated hypofractionated radiotherapy

Table 1 Contralateral breast treatment characteristics

Treatment characteristics	Range
Dose max	290-448 cGy
Mean dose	45-70 cGy
Median dose	29-47 cGy
Monitor units	199-217
Breast volume	749-1474 cm3

Table 2 Statistical analysis

Correlation	Spearman rho	P value
Breast volume vs max dose to the breast	0.0090	0.0292
Breast volume vs mean dose to the breast	0.0153	0.0025
Breast volume vs median dose to the breast	0.0028	0.046
Breast volume vs gantry angle	0.0042	0.2195

Table 3 Calculated doses, breast volume and monitor units in details

No.	Age (yr)	Breast volume (cm3)	Breast dose (cGy)
			Max	Mean	Median	MU
1	79	1474	348	49	31	217
2	55	1090	380	45	41	209
3	63	803	367	54	47	203
4	61	749	290	45	35	199
5	71	789	448	63	46	203
6	56	857	345	56	36	204
7	67	942	401	47	32	210
8	72	801	412	52	39	200
9	61	998	434	51	40	202
10	56	796	399	52	45	210
11	58	893	387	45	33	199
12	72	956	402	70	33	204
13	71	1001	345	55	41	207
14	79	842	204	49	39	204
15	64	865	341	51	38	207
16	57	789	296	57	40	209
17	66	985	356	68	32	205
18	73	934	298	54	30	209
19	75	924	304	57	39	200
20	76	1023	326	61	45	210
21	59	1031	348	49	42	210
22	52	1320	401	51	40	211
23	57	980	295	59	32	205
24	58	1002	432	57	34	206
25	74	1007	422	49	37	209
26	70	983	427	61	40	200
27	60	879	346	58	40	204
28	74	765	307	49	38	214
29	68	795	401	60	39	208
30	72	1021	397	50	32	201
31	70	784	350	63	29	205
32	59	788	386	57	36	201
33	62	901	409	55	42	209
34	67	854	297	70	45	202