Open Access

Table 1

Dosimetric comparison between treatment plans planned on DIBH CT and free breathing CT. If the p-value was over 0.05, it was considered non-significant (N.S.).

Technique Dosimetric endpoint Free-breathing DIBH p
3D-CRT PTV V 95 (%) 99.43 ± 0.59 99.28 ± 0.49 N.S.
Heart D mean (Gy) 2.66 ± 0.85 1.11 ± 0.24 <0.001
LAD D 0.1CC (Gy) 39.48 ± 1.52 29.97 ± 4.37 0.007
Left lung V 4Gy (%)* 29.9 ± 6.55 28.43 ± 5.19 N.S.
Left lung V 16Gy (%)* 15.43 ± 4.74 13.31 ± 3.02 N.S.
Left lung D mean (Gy) 6.95 ± 1.74 6.24 ± 1.17 N.S.
Right breast D mean (Gy) 0.19 ± 0.09 0.23 ± 0.11 N.S.
VMAT&IMRT PTV V 95 (%) 99.01 ± 1.1 99.31 ± 0.99 N.S.
Heart D mean (Gy) 4.59 ± 1.23 3.72 ± 0.79 0.013
LAD D 0.1CC (Gy) 39.36 ± 7.94 22.64 ± 11.95 <0.001
Left lung V5Gy (%) 63.4 ± 6.69 59.79 ± 3.45 0.044
Left lung V 20Gy (%) 25.66 ± 3.49 22.67 ± 3.36 0.011
Left lung D mean (Gy) 13.84 ± 1.46 12.88 ± 110 0.028
Right breast D mean (Gy) 3.76 ± 0.79 3.24 ± 0.95 N.S.
*

Lung dose constraints V4 and V16 for 3D-CRT treatments with 40.05 Gy prescription were scaled down from V5 and V20 for IMRT/VMAT with 50 Gy prescription.

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