Development of clinical application program for radiotherapy induced cancer risk calculation using Monte Carlo engine in volumetric-modulated arc therapy

Table 2 Results for OED, EAR and ERR calculation of VMAT plan in MC and TPS

	Organ	OED in MC (Gy)	OED in TPS (Gy)	EAR^a (per 100,000 population)		ERR^a (per 100,000 population)
	Organ	OED in MC (Gy)	OED in TPS (Gy)	MC	TPS	MC	TPS
Brain	Rt. Eye	1.5	1.5	9.5	9.4	0.4	0.4
	Brainstem	4.6	4.5	28.8	27.0	1.3	1.2
	Rt. Parotid	0.3	0.3	1.7	1.7	0.1	0.1
	Rt. Lens	1.0	1.0	6.5	6.5	0.3	0.3
Lung	Lt. Lung	3.0	2.8	6.9	6.4	1.0	0.7
	Rt. Lung	3.6	3.5	8.4	8.2	1.2	1.2
	Esophagus	4.4	4.1	27.2	25.3	1.2	1.1
	Heart	1.8	1.8	11.2	11.2	0.5	0.4
Abdomen	Liver	0.7	0.7	0.7	0.7	0.2	0.2
	Cord	4.3	4.4	20.7	21.2	1.9	1.9
	Lt. Kidney	6.3	6.3	39.1	38.0	1.7	1.5
	Rt. Kidney	6.1	6.0	37.7	34.0	1.6	1.4
	Colon	3.4	3.3	10.8	10.0	2.1	1.7
Prostate	Bladder	0.2	0.2	0.2	0.2	0.1	0.1
Prostate	Rectum	1.4	1.4	4.4	4.4	0.9	0.9
Spine	Bowel	1.3	1.2	8.0	7.2	0.3	0.3
	Liver	0.2	0.1	0.3	0.1	0.0	0.0
	Lt. Kidney	1.7	1.5	10.7	8.4	0.5	0.4
	Rt. Kidney	1.0	0.9	6.0	3.7	0.3	0.2

OED organ equivalent dose, VMAT volumetric modulated arc therapy, TPS treatment planning system, Rt right, Lt left, MC Monte Carlo, EAR excess absolute risk, ERR excess relative risk
^aCaution: the value of EAR and ERR were the maximum values set from exposure age 30 to attained age 90

ISSN: 1748-717X