Monte Carlo-Based Dose Calculation in Postprostatectomy Image-Guided Intensity Modulated Radiotherapy: A Pilot Study

Table 1

Comparison between XiO S&S, Monaco S&S, and Monaco VMAT treatment plans for five postprostatectomy patients: CTV coverage, OAR dose-volumes. and treatment delivery parameters (means (SD)).

Parameter	XiO S&S	Monaco S&S	Monaco VMAT
CTV 100% TD (%)	97.98 (0.01)	99.85 (0.00)	99.44 (0.00)
Rectum V40Gy (%)	58.06 (0.06)	46.36 (0.09)	54.66 (0.05)
Rectum V60Gy (%)	31.25 (0.04)	19.89 (0.05)	21.09 (0.04)
Rectum V65Gy (%)	14.29 (0.09)	11.34 (0.03)	10.35 (0.03)
Bladder V50Gy (%)	41.91 (0.13)	32.97 (0.09)	37.96 (0.08)
Lt. femoral head mean dose (Gy)	19.89 (3.78)	16.18 (1.86)	14.69 (0.93)
Rt. femoral head mean dose (Gy)	14.76 (8.40)	12.74 (7.18)	11.52 (7.46)
Number of segments/fraction	116.8 (22.0)	78.6 (8.3)	141.0 (27.0)
MU/fraction	770.7 (76.2)	677.6 (76.3)	676.7 (29.6)
Delivery time (minutes)	7.6 (1.1)	5.7 (0.9)	4.8 (0.3)

Monaco S&S versus XiO, . Monaco VMAT versus XiO, . Monaco S&S versus Monaco VMAT, .