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Reduce Organ At Risk Dose enables treatment planners to consistently
reach plans that cannot be improved upon.

One click post processing method applied after the conventional planning.

In treatment planning once a plan satisfying the clinical goals has been found, there are often aspects of the plan that can be further improved upon. To simplify procuring the improvements, RayStation features the Reduce Organ At Risk Dose which is a one-click post-processing functionality that can easily be applied after conventional planning. It enables treatment planners to consistently reach plans that cannot be improved upon.

The functionality attempts to reduce the dose to the organs at risk (OARs) of an existing plan while maintaining target coverage and dose homogeneity within the target structures. The functionality pushes the solution to a point at the Pareto surface, and assured that the solution is Pareto optimal in the sense that it is not possible to reduce dose to an organ at risk without increasing dose to at least one other organ at risk, reducing target coverage or target homogeneity.

This optimization functionality is available for VMAT, IMRT and PBS in RayStation.

Download our white paper to learn more.

 

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Figure 1. ADMISSIBLE DVHs

The shaded regions illustrate the admissible DVHs for a target (blue) and an OAR (red).
 
Figure 2. IMPROVED DVHs
The DVHs of a brain case for the plan resulting from Reduce OAR dose (solid) and the reference plan (dotted). The target coverage is almost identical in all plans, but the OAR doses are much improved by Reduce OAR dose.
 
Figure 3. DOSE DIFFERENCE
Dose difference (reduced – reference) in a transversal slice. Blue fields represent regions where the dose has been reduced.

 

Download Reduce OAR Dose in RayStation White Paper
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