AN
OPTIMIZED FORWARD-PLANNING TECHNIQUE FOR INTENSITY MODULATED TREATMENT OF PROSTATE CANCER
Ying Xiao, Richard K. Valicenti, James M. Galvin
Department of Radiation Oncology, Kimmel Cancer Center, Jefferson
Medical College, Thomas Jefferson University Hospital, Philadelphia, PA
Conclusions: This study demonstrates that the simple
computer-optimized forward treatment planning technique described here can generate dose
distributions that conform to a target (the prostate) with an invagination that surrounds
a critical structure (the rectum). This technique is appealing because it uses a
relatively small number of field segments with most of the dose delivered with portals
that conform to the beam’s-eye view of the target. This fact greatly simplifies
verification in that standard port filming techniques can be employed. Further study of
this technique with additional patients and other critical structures is in progress.
Global Dose Maximum
7400 cGy |
| |
|
Weighting
assigned to the rectum |
| |
Six Fields |
0.1 |
0.5 |
0.7 |
0.9 |
Volume of Rectum
receiving 95% of
prescription dose (%) |
18 |
15 |
1 |
0 |
0 |
Min. Dose
Prostate (cGy) |
7110 |
7050 |
6900 |
6740 |
6610 |
Min. Dose
Prostate
(%) |
96 |
95 |
93 |
91 |
89 |
Purpose | Materials
and Methods | Results | Conclusions
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