Table 4. Radiation dose to cardiac substructures (all values are EQD2).

Substructure	Mean (Gy)	Median (Gy)	Range (Gy)
Whole heart
Mean dose	1.90	1.03	0.04–11.00
D0.03cc	33.38	13.10	0.15–212.22
Aortic valve
Mean dose	2.21	0.47	0.05–10.37
D0.03cc	4.04	0.74	0.07–33.47
AV node
Mean dose	1.93	0.18	0–15.19
D0.03cc	2.73	0.20	0.01–20.63
Left anterior descending artery
Mean dose	2.01	0.80	0.02–16.17
D0.03cc	5.67	2.30	0.04–48.60
Left atrium
Mean dose	3.38	1.62	0.06–43.47
D0.03cc	20.67	9.19	0.13–195.20
Left circumflex artery
Mean dose	3.65	0.53	0.02–35.52
D0.03cc	5.59	0.80	0.04–64.73
Left main coronary artery
Mean dose	3.03	0.51	0.05–32.73
D0.03cc	4.06	0.73	0.05–34.38
Left ventricle
Mean dose	1.47	0.20	0.02–12.02
D0.03cc	12.92	2.84	0.09–143.68
Mitral valve
Mean dose	2.39	0.18	0.01–22.79
D0.03cc	3.09	0.20	0.02–28.80
Pulmonic valve
Mean dose	2.85	0.54	0.04–33.26
D0.03cc	5.61	1.22	0.06–45.72
Right atrium
Mean dose	3.03	0.52	0.03–31.38
D0.03cc	21.37	5.76	0.07–211.47
Right coronary artery
Mean dose	2.27	0.64	0.02–17.47
D0.03cc	5.53	2.55	0.03–47.91
Right ventricle
Mean dose	1.46	0.51	0.02–9.71
D0.03cc	12.87	5.96	0.07–194.45
Tricuspid valve
Mean dose	2.02	0.16	0.02–15.04
D0.03CC	2.58	0.18	0.04–18.63

cc, cubic centimeters, D_0.03cc (Gy), minimum radiation dose received by the highest dose 0.03 cc volume of a given structure expressed in Gy.