Low-Dose-Area-Constrained Helical TomoTherapy-Based Whole Breast Radiotherapy and Dosimetric Comparison with Tangential Field-in-Field IMRT

Table 1

Average dosimetric characteristics of the target.

	LDC-HT	FIF-IMRT	𝑃 value
PTV; (prescribed dose: 46 Gy)
𝑉50.6Gy or 𝑉110%	0.7%	15.68%	0.056
𝑉43.7Gy or 𝑉95%	98.73%	98.53%	0.392
Mean dose (Gy)	48.28	49.18	0.002
Maximum dose (Gy)	51.47	51.36	0.667
Homogeneity index	1.08	1.10	0.001
Conformity index	0.83	0.76	0.023