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An algorithm for shifting MLC shapes to adjust for daily prostate movement during concurrent treatment with pelvic lymph nodesa)
a)Presented in part at the American Association of Physicists in Medicine (AAPM) annual meeting, Seattle, WA, 2005.
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10.1118/1.2804579
/content/aapm/journal/medphys/34/12/10.1118/1.2804579
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/12/10.1118/1.2804579
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Flowchart of the in-house computer program.

Image of FIG. 2.
FIG. 2.

DVHs for the prostate showing the original plan and three types of shifts to compensate for a 1.5 cm posterior prostate movement: an iso-shift, a fMLC-shift, and a pMLC-shift.

Image of FIG. 3.
FIG. 3.

DVHs for the pelvic lymph nodes showing the original plan and three types of shifts to compensate for a 1.5 cm posterior prostate movement: an iso-shift, a fMLC-shift, and a pMLC-shift.

Image of FIG. 4.
FIG. 4.

Sample isodose distribution for a 1.5 cm posterior prostate shift. The original treatment plan can be compared to an iso-shift and a pMLC-shift. The shift images show the shifted prostate contour.

Image of FIG. 5.
FIG. 5.

Tumor dose coverage for the original plan and posterior prostate shifts of 0.5, 1.0, and 1.5 cm. Iso-shifts can be compared to pMLC-shifts for each magnitude, in terms of the for the prostate and pelvic lymph nodes.

Image of FIG. 6.
FIG. 6.

Tumor dose coverage for the original plan and superior prostate shifts of 0.5, 1.0, and 1.5 cm. Iso-shifts can be compared to pMLC-shifts for each magnitude, in terms of the for the prostate and pelvic lymph nodes. The “mixed” plan is a 1 cm superior pMLC-shift combined with a 0.5 cm superior iso-shift.

Image of FIG. 7.
FIG. 7.

Sample isodose distribution for a 1.5 cm superior prostate shift. The original treatment plan can be compared to an iso-shift, a pMLC-shift, and a mixed shift, consisting of a 1 cm superior pMLC-shift combined with a 0.5 cm superior iso-shift. The shift images show the shifted prostate contour.

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/content/aapm/journal/medphys/34/12/10.1118/1.2804579
2007-11-20
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: An algorithm for shifting MLC shapes to adjust for daily prostate movement during concurrent treatment with pelvic lymph nodesa)
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/34/12/10.1118/1.2804579
10.1118/1.2804579
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