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Table 3 Planning summary for 73 lesions (30 patients)

From: Hippocampal avoidance with volumetric modulated arc therapy in melanoma brain metastases – the first Australian experience

Specification Abbrev. Units No* Median Mean Minimum Maximum
Whole-brain radiotherapy (Gy)* WBRT pts* 23 30.0 30.6 28.6 37.5
Fraction Frx les 73 10.0 11.8 5.0 15.0
Dose to hippocampus with HA ) (Gy) HA pt 20 21.9 20.4 8.4 32.2
without HA (Gy) - pts 10 29.0 41.1 24.3 56.5
Simultaneous integrated boost (Gy) SIB pts 29 45.0 44.8 20.0 70.8
Gross target volume (cc)* GTV les* 71 0.6 6.9 0.02 291.3
Planning target volume (cc) PTV les 67 3.3 13.3 0.4 344.0
Prescription isodose volume (cc) PIV les 64 2.4 12.6 0.1 389.0
Maximum dose (Gy)* MD les 73 45.6 47.1 22.0 72.0
Prescription dose (Gy) PD les 71 45.0 44.8 20.0 70.8
Conformity index PITV les 64 3.2 8.6 0.2 70.0
Homogeneity MDPD les 71 1.06 1.06 1.01 1.10
Beam time (min) BT les 68 3.4 3.6 1.2 6.3
  1. No*: number, (Gy)*: Graypts*: patient, les*: lesion, (cc)*: cubic centimetre, (Gy)*: Gray.