Comparison of average dose-volumetric histograms between the E1P, P3P, and P5P plans.

<p>(A) for the PTV1, PTV2, heart, and total lung in all cases, (B) for the heart in left breast cancer cases and total lung in right breast cancer cases.</p

Beam’s eye views of the HBE plans.

<p>(A) The medial tangential field of the 3D-CRT plan was the base of the HBE plan. The medial border of the field was the patient’s midline; (B) The medial tangential field of the HBE plan was designed by blocking the shape of the heart; (C) The electron beam of the HBE plan was completely overlapped with the heart block on the beam’s eye view at an angle of 5° (PTV = red area; heart = blue area; midline = light green line). (Abbreviation: HBE = heart block with electron compensation radiotherapy; PTV = planning target volume; 3D-CRT = three-dimensional conformal radiotherapy).</p

The feasibility of a heart block with an electron compensation as an alternative whole breast radiotherapy technique in patients with underlying cardiac or pulmonary disease - Fig 3

<p><b>Dose distributions of (A) the 3D-CRT, (B) IMRT and (C) HBE plans</b> (PTV = semi-lucent red area; heart = semi-lucent orange area; pink line = 49 Gy; yellow line = 47.5 Gy; yellowish green line = 45 Gy; blue line = 40 Gy; navy line = 25 Gy; green line = 10 Gy; white line = 5 Gy). (Abbreviation: 3D-CRT = three-dimensional conformal radiotherapy; HBE = heart block with electron compensation radiotherapy; IMRT = intensity-modulated radiotherapy; PTV = planning target volume).</p

An example of dose distribution of (A) E1P plan, (B) P3P plan, and (C) P5P plan (PTV_Boost = semi-lucent red area; yellow line = 60 Gy; light green line = 57 Gy; blue line = 54 Gy; cyan line = 51 Gy; dark blue line = 48 Gy; green line = 30 Gy).

<p>An example of dose distribution of (A) E1P plan, (B) P3P plan, and (C) P5P plan (PTV_Boost = semi-lucent red area; yellow line = 60 Gy; light green line = 57 Gy; blue line = 54 Gy; cyan line = 51 Gy; dark blue line = 48 Gy; green line = 30 Gy).</p

Comparison of dosimetric parameters between the 3 types of plans in all 20 cases.

<p>Comparison of dosimetric parameters between the 3 types of plans in all 20 cases.</p

Dosimetric comparison for OARs between 3D-CRT, HBE and IMRT.

<p>Dosimetric comparison for OARs between 3D-CRT, HBE and IMRT.</p

Clinical characteristics of 20 patients.

<p>Clinical characteristics of 20 patients.</p

Comparison of dosimetric parameters between the 3 types of plans in terms of the heart and total lung.

<p>Comparison of dosimetric parameters between the 3 types of plans in terms of the heart and total lung.</p

Percent depth dose (PDD) at the central axis in the Blue water phantom study.

<p>(a) PDD calculated from the treatment planning system and (b) PDD measured from the film.</p

Dose distributions of the three treatment plans from the Blue water phantom study.

<p>(a) Plan without a bolus, (b) plan with the superflab bolus, and (c) plan with the 3-dimensional printed flat bolus. Pink line, 105% isodose contour; yellow line, 100% isodose contour; blue line, 90% isodose contour; cyan line, 70% isodose contour; white line, 50% isodose contour; dark green, 30% isodose contour.</p