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Table 1 Calculated median doses (D50) for the hair follicle volume and its subvolumes for the VMAT- and OF- plan normalized to the prescription dose per fraction (4 Gy)

From: Hair-sparing whole brain radiotherapy with volumetric arc therapy in patients treated for brain metastases: dosimetric and clinical results of a phase II trial

  VMAT-WBRT OF-WBRT
Hair follicle subvolume Calculated D50 Calculated D50 Calculated D50 Calculated D50
1 mm grid (%) 4 mm grid (%) 1 mm grid (%) 4 mm grid (%)
Total 72.4 68.5 100.10 92.34
Top 67.3 60.8 106.60 90.79
Left 81.4 78.4 97.58 92.92
Back 62.3 59.8 103.40 94.09
Right 80 75.9 93.99 89.82