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--- planning:userguide:tutorials:range_compensators [2019/09/19 16:55] – [Geometric or Dose Based] kerhart
+++ planning:userguide:tutorials:range_compensators [2021/07/29 18:28] (current) – external edit 127.0.0.1
@@ Line 30: / Line 30: @@
 ===== Range Compensator Parameters =====
-  * The range compensator calcuation uses a distal range margin that is the addition of the user-defined "Range Margin Distance" and the "Range Margin Percentage" of the beam range. The "Smear Radius" is a distance weighting coefficient which influences the smoothing in the range compensator calculation. Any drill points within this radius are dropped to the lowest height neighbor. The "Target Distal Dose" is the dose value that the range compensator calculation will try to achieve on the distal edge of the target. {{ :planning:userguide:tutorials:range_compensator_parameters.png?300 |}}
+  * The range compensator calculation uses a distal range margin that is the addition of the user-defined "Range Margin Distance" and the "Range Margin Percentage" of the beam range. The "Smear Radius" is a distance over which to reduce heights of nearby drill points to avoid narrow valleys in the compensator surface and improve treatment robustness. All drill points are dropped to the lowest height neighbor within this radius. The "Target Distal Dose" is the dose value that the range compensator calculation will try to achieve on the distal edge of the target (most typically 90%). {{ :planning:userguide:tutorials:range_compensator_parameters.png?300 |}}