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Effect of respiratory motion on the delivery of breast radiotherapy using SMLC intensity modulation
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10.1118/1.2405323
/content/aapm/journal/medphys/34/1/10.1118/1.2405323
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/1/10.1118/1.2405323
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Experimental setup of the breast phantom used in this study. (b) Close-up of the breast phantom with the film inserted between the second and third polystyrene slices. Given the orientation of the breast phantom, the film actually corresponds to an axial slice.

Image of FIG. 2.
FIG. 2.

Three-dimensional illustration of the intensity maps for the medial (a) and lateral (b) fields of the Corvus IMRT plan. Relatively high intensities are delivered to the anterior portion which corresponds to the virtual bolus region.

Image of FIG. 3.
FIG. 3.

Reproducibility assessment of two films measured under identical experimental condition. In each set, the first two are threshold subtraction plots, in which the tolerances are set to and , respectively. Pixels within tolerance are shown in white, pixels exceeding the upper limit are in red and pixels below the lower limit are in blue. The third plot provides overlaid isodose lines for each pair of films. The 120, 110, 100, 80, 60 and isodose lines are shown. (a) Medial field of the Corvus IMRT plan with peak-to-trough amplitude. (b) Aperture-based IMRT plan with peak-to-trough amplitude.

Image of FIG. 4.
FIG. 4.

Differences between two films measured with and without motion. In each set, the first two are threshold subtraction plots, in which the tolerances are set to and , respectively. The third plot provides overlaid isodose lines for each pair of films. The 120, 110, 100, 80, 60, and isodose lines are shown. (a) Medial field of the Corvus plan. Motion starts with 90° initial phase, peak-to-trough amplitude. (b) Medial field of the Corvus plan. Motion starts with 180° initial phase, peak-to-trough amplitude. (c) Lateral field of the Corvus plan. Motion starts with 180° initial phase, peak-to-trough amplitude. (d) Motion effect of the aperture-based IMRT plan. Motion starts with 0° initial phase, peak-to-trough amplitude.

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/content/aapm/journal/medphys/34/1/10.1118/1.2405323
2006-12-26
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effect of respiratory motion on the delivery of breast radiotherapy using SMLC intensity modulation
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/1/10.1118/1.2405323
10.1118/1.2405323
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