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Dose calculation for permanent prostate implants incorporating spatially anisotropic linearly time-resolving edema
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10.1118/1.3568926
/content/aapm/journal/medphys/38/4/10.1118/1.3568926
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/4/10.1118/1.3568926

Figures

Image of FIG. 1.
FIG. 1.

RPC reference case 2 places 81 seeds in a regular geometrical pattern inside a virtual cylindrically symmetric prostate volume. This figure is taken from Ref. 16. Note that the coordinate system differs from that in Figs. 3–6 in this paper.

Image of FIG. 2.
FIG. 2.

Symbols represent clinically recommended data for the Oncura model 6711 and Theragenics model 200 seeds (Ref. 18) and the IsoRay model CS-1 seed (Ref. 19). Lines are sixth order, even power, piecewise polynomial fits used in dose calculation [see Eqs. (10) and (11)].

Image of FIG. 3.
FIG. 3.

(%) for model 6711 seeds in the central axial slice of the RPC test case 2 phantom for different edema magnitudes and periods. Tissue and seed displacements representing anisotropic edema assumed equal edema in the (A-P) and (S-I) directions but no edema in the (L-R) direction. The origin of the coordinate system is taken as the center of the seed distribution, and distances are in cm. Note that the color scale values are different in each panel.

Image of FIG. 4.
FIG. 4.

(%) for seeds and edema parameters and . Tissue and seed displacements representing anisotropic edema assumed equal edema in the (A-P) and (S-I) directions but no edema in the (L-R) direction. The origin of the coordinate system is taken as the center of the seed distribution, and distances are in cm.

Image of FIG. 5.
FIG. 5.

(%) for seeds and edema parameters and . Tissue and seed displacements representing anisotropic edema assumed equal edema in the (A-P) and (S-I) directions, but no edema in the (L-R) direction. The origin of the coordinate system is taken as the center of the seed distribution, and distances are in cm.

Image of FIG. 6.
FIG. 6.

(%) for seeds and edema parameters and . Tissue and seed displacements representing anisotropic edema assumed equal edema in the (A-P) and (S-I) directions, but no edema in the (L-R) direction. The origin of the coordinate system is taken as the center of the seed distribution, and distances are in cm.

Image of FIG. 7.
FIG. 7.

Comparison of [Eq. (11); symbols] and [Eq. (14); lines] for the RPC test case 2 phantom and the different seed models designated by radionuclide content, where denotes spatial averaging. Left panels: spatial average taken over the entire dose calculation volume. Right panels: spatial average taken over the 10% of the calculation volume with the highest values of .

Tables

Generic image for table
TABLE I.

for seeds.

Generic image for table
TABLE II.

for seeds.

Generic image for table
TABLE III.

for seeds.

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/content/aapm/journal/medphys/38/4/10.1118/1.3568926
2011-03-31
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dose calculation for permanent prostate implants incorporating spatially anisotropic linearly time-resolving edema
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/38/4/10.1118/1.3568926
10.1118/1.3568926
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