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Table 1 Different dosimetrical paramters (i.e., conformity index (CI), gradient index (GI) and volume receiving 12Gy (V12), 10Gy (V10) and 5Gy (V5) for the different treatment techniques: multiple isocenter dynamic conformal arc (MIDCA), single isocenter DCA and volumetric modulated arc therapy (VMAT)

From: Evaluation of a dedicated brain metastases treatment planning optimization for radiosurgery: a new treatment paradigm?

   CI GI V12 (cc) V10 (cc) V5 (cc)
1–3 lesions (n = 14) MIDCA 0.67 ± 0.06 3.9 ± 1.5 30.4 ± 24.6 39.5 ± 31.0 131.1 ± 107.6
SIDCA 0.67 ± 0.07 3.3 ± 0.6 31.9 ± 24.9 41.6 ± 31.0 118.9 ± 85.1
VMAT 0.69 ± 0.20 5.3 ± 2.2 38.1 ± 28.9 52.9 ± 39.9 191.1 ± 174.1
>3 lesions (n = 26) MIDCA 0.66 ± 0.08 4.9 ± 1.5 45.8 ± 32.2 68.2 ± 50.8 258.9 ± 175.8
SIDCA 0.63 ± 0.08 4.5 ± 1.7 45.0 ± 34.8 62.3 ± 48.3 247.0 ± 219.0
VMAT 0.65 ± 0.14 8.5 ± 3.0 62.9 ± 49.6 98.0 ± 80.6 418.0 ± 246.3
All lesions (n = 40) MIDCA 0.66 ± 0.07 4.5 ± 1.6 35.6 ± 26,4 49.0 ± 38.1 173.7 ± 138.0
SIDCA 0.65 ± 0.08 3.9 ± 1.4 36.3 ± 27.1 48.5 ± 35.9 161.6 ± 143.6
VMAT 0.67 ± 0.16 7.1 ± 3.1 46.3 ± 35.9 67.9 ± 55.9 266.7 ± 216.7