The Scatter Search Based Algorithm for Beam Angle Optimization in Intensity-Modulated Radiation Therapy

Table 3

Comparison of plan quality indices for seven-angle selection of prostate case.

VOI	Optimal plan	Equiangular plan
PTV 56 (Target)
]	67.35	67.33
	54.56	54.55
HI (%)	22.83	22.82
	0.4153	0.3548
PTV 68 (target)
]	69.8	70.06
	63.45	63.44
HI (%)	9.3359	9.7482
	0.8243	0.7647
Bladder (OAR)
Mean dose  ]	42.32	45.54
Max. dose  ]	71.19	71.45
	68.33	68.78
	25.39	30.13
Rectum; (OAR)
Mean dose  ]	40.92	42.95
Max. dose  ]	69.37	69.94
	61.36	60.94
	15.25	9.89