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Sensitivity of postplanning target and OAR coverage estimates to dosimetric margin distribution sampling parameters
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10.1118/1.3544364
/content/aapm/journal/medphys/38/2/10.1118/1.3544364
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/2/10.1118/1.3544364
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Figures

Image of FIG. 1.
FIG. 1.

Variation in the coverage probability with systematic standard deviation for type I targets and type I/II OAR. Plots were obtained from patient 28 by calculating CTV (type I), bladder (type II), and rectum (type I) and then computing coverage [Eqs. (2)–(4)] for values ranging from 0 to 7 mm. The purpose of these plots is to illustrate the qualitative dependence of on , not the specific coverage values obtained for patient 28.

Image of FIG. 2.
FIG. 2.

Box plots of : (a) CTV obtained using the FAI (left) and ISO (right) methods, (b) bladder for type I (left) and type II (right) plans (FAI method), and (c) rectum for type I (left) and type II (right) plans (FAI method). The upper and the lower markers are the maximum and minimum values taken over the 28 plans, the box extends from the 10th to 90th percentile, and the triangle is the median value.

Image of FIG. 3.
FIG. 3.

box plots for CTV obtained using the FAI (left) and ISO (right) calculation methods: (a) range versus . All values were calculated using . Baseline values were obtained using . (b) range versus . All values were calculated using . Baseline values were obtained using . The upper and the lower markers are the maximum and minimum values taken over the 28 plans, the box extends from the 10th to 90th percentile, and the triangle is the median value.

Image of FIG. 4.
FIG. 4.

box plots for bladder and obtained using the FAI calculation method: (a) range versus . All values were calculated using . Baseline values were obtained using . (b) range versus . All values were calculated using . Baseline values were obtained using . The upper and the lower markers are the maximum and minimum values taken over the 28 plans, the box extends from the 10th to 90th percentile, and the triangle is the median value.

Image of FIG. 5.
FIG. 5.

box plot for rectum and obtained using the FAI calculation method: (a) range versus . All values were calculated using . Baseline values were obtained using . (b) range versus . All values were calculated using . Baseline values were obtained using . The upper and the lower markers are the maximum and minimum values taken over the 28 plans, the box extends from the 10th to 90th percentile, and the triangle is the median value.

Image of FIG. 6.
FIG. 6.

Example DMDs obtained using the FAI method, plotted on the 3D axes. (a) Patient 4 CTV (type I), (b) patient 27 bladder (type I), and (c) patient 21 bladder (type II). is the RL component of the dosimetric margin (i.e., the dosimetric margin projected onto the patients RL axis). and are the PA and SI components.

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/content/aapm/journal/medphys/38/2/10.1118/1.3544364
2011-01-31
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Sensitivity of postplanning target and OAR coverage estimates to dosimetric margin distribution sampling parameters
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/2/10.1118/1.3544364
10.1118/1.3544364
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