Table 2.

Coverage of Helical Tomotherapy and Gamma Knife Stereotactic Radiosurgery Plans in Patients with Single Brain Metastasis.

	TOMOTHERAPY	GAMMA KNIFE
Patient #1	0.983	1.000
Patient #2	0.944	0.990
Patient #3	0.978	0.970
Patient #4	0.962	0.962
Patient #5	0.997	0.997

Coverage = (PTV volume within prescription iso-dose line)/(PTV volume)