Section 370

Section 370.TABLE A Mammography Dose Evaluation Table

This Table is used to determine the mean glandular dose in milligrays delivered by 25.8 mC/kg (or millirad) delivered by 1 R in air incident on a 4.2 centimeter thickness compressed breast of average density (50 percent adipose and 50 percent glandular tissue). Values listed are for the first half-value layer (HVL) in millimeters of aluminum (mm Al), for x-ray tube target-filter combinations of molybdenum/molybdenum (Mo/Mo) and tungsten/ aluminum (W/Al). Linear extrapolation or interpolation shall be made for any HVL not listed.

Mean Glandular Dose in milligrays for 25.8 mC/kg (or millirad for 1 R) Entrance Exposure for a 4.2 Centimeter Compressed Breast of Average Density

HVL	Mo/Mo Target-Filter X-Ray Tube Voltage (kVp)											W-A1 Target-
(mm AL)	23	24	25	26	27	28	29	30	31	32	33	Filter Combination
0.23	116
0.24	121	124
0.25	126	129	131
0.26	130	133	135	138
0.27	135	138	140	142	143
0.28	140	142	144	146	147	149
0.29	144	146	148	150	151	153	154
0.30	149	151	153	155	156	157	158	159				170
0.31	154	156	157	159	160	161	162	163	164			175
0.32	158	160	162	163	164	166	167	168	168	170	171	180
0.33	163	165	166	168	169	170	171	173	173	174	175	185
0.34	168	170	171	172	173	174	175	176	177	178	179	190
0.35		174	175	176	177	178	179	180	181	182	183	194
0.36			179	181	182	183	184	185	185	186	187	199
0.37				185	186	187	188	189	190	191	191	204
0.38					190	191	192	193	194	195	195	208
0.39						196	197	198	198	199	200	213
0.40							201	202	203	204	204	217
0.41								206	207	208	208	221
0.42									211	212	212	225
0.43										215	216	230
0.44											220	234
0.45												238

AGENCY NOTE: Adapted from: Mammography Quality Control Manual: Medical Physicist's Section, Revised Edition, 1999.

(Source: Amended at 33 Ill. Reg. 2224, effective January 23, 2009)