Left-Sided Whole Breast Irradiation with Hybrid-IMRT and Helical Tomotherapy Dosimetric Comparison

Table 1

Characteristics of the anatomy conditions of critical structures and targets in this study.

ΔMTCA	Number of cases (%)		Mean ± SD
180°–190°	4	13.3%	201.5° ± 11.6°
190°–200°	7	23.3%
200°–210°	10	33.3%
>210°	9	30.0%
MLD (cm)	Number of cases (%)		Mean ± SD
1.0–1.5	2	6.7%	2.5 ± 0.6
1.5–2.0	4	13.3%
2.0–2.5	5	16.7%
2.5–3.0	14	46.7%
>3.0	5	16.7%
MHD (cm)	Number of cases (%)		Mean ± SD
0.0–1.0	5	16.7%	1.9 ± 1.0
1.0–1.5	8	26.7%
1.5–2.0	2	6.7%
2.0–2.5	7	23.3%
>2.5	8	26.7%