Defining the Optimal Time of Adaptive Replanning in Prostate Cancer Patients with Weight Change during Volumetric Arc Radiotherapy: A Dosimetric and Mathematical Analysis Using the Gamma Index

Table 3

The changes in gamma index with changes in body contour from −2.0 cm to 2.0 cm.

		Body contour changes (cm)
		−2.0	−1.5	−1.0	−0.5	0	0.5	1.0	1.5	2.0
6-MV	GPR	90.10	91.80	94.30	98.00	100.00	98.70	95.50	93.80	92.50
	MG	10.00	8.76	6.27	3.21	0.00	1.85	2.88	3.69	4.29
10-MV	GPR	91.60	93.20	95.70	99.40	100.00	99.80	96.90	95.10	93.30
	MG	6.89	4.81	3.19	1.75	0.00	1.39	2.19	2.85	3.30
15-MV	GPR	92.80	94.60	96.50	99.70	100.00	99.80	98.00	95.80	94.10
	MG	5.90	4.55	3.01	1.58	0.00	1.06	1.68	2.08	2.38

GPR, gamma pass rate; MG, maximum gamma values. Italic font: unacceptable.