Table 4.

Results for the 3-dimensional γ-index for the IMRT test case in Fig. 4b. The comparison uses δd₀ = 3 mm, δD₀ = 3%, and region of interest denned by 30% of the maximum dose. IMRT uses collimators to shape the dose distribution which tests the limits of the numerical techniques. In this case, even in the presence of collimators, both the 1^st-order Method F and 2^nd-order Method I give P_γ≤1 with ~ 1% accuracy.

	Pγ≤1 [%]	Accuracy [%]	Calculation time [s]
A	90.80	-	22000
B	89.88	1.0	2300
C	37.97	58	1.5
D	81.65	10.1	36.7
E	91.80	1.1	4.7
F	91.75	1.1	28.0
G	90.71	0.1	34.7
H	88.71	2.3	51.9
I	90.04	0.8	35.6