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--- userguide:radiotherapy_support_functions:rsf [2015/06/15 18:53] – [Contour and Structure Modification] decimal
+++ userguide:radiotherapy_support_functions:rsf [2015/07/02 15:42] (current) – removed dpatenaude
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-====== Radiotherapy Support Functions (RSF) ======
-Radiotherapy Support Functions are, as a basic description, general radiotherapy worker functions. RSF functions are used both various Dose Calculation Functions and Design Task Functions. The RSF function category encompass the remaining functions not classified as a DTF or DCF.
-===== Image Processing =====
-Below is a list of some common image processing functions and a brief explanation of their intended usage (Specific details of each function, argument parameters, and return values are provided at the [[http://docs.dosimetry.dotdecimal.com|Dosimetry App Manifest Guide]]).
-  * **override_image_inside_structure:**
-    * Returns a new 3D image where the value of each voxel that is more than cutoff % contained within the structure is set to the provided override value.
-  * **override_image_outside_structure:**
-    * Modifies an image where the value of each voxel that is more than cutoff % contained within the structure is set to the provided override value  (values outside the structure are not modified).
-  * **override_image_variant_outside_structure:**
-    * Returns a new 3D image where the value of each voxel that is more than cutoff % outside the structure is set to the provided override value.
-===== Contour and Structure Modification =====
-Below is a list of some common polygon, polyset, and structure manipulation functions and a brief explanation of their intended usage (Specific details of each function, argument parameters, and return values are provided at the [[http://docs.dosimetry.dotdecimal.com|Dosimetry App Manifest Guide]]).
-  * **polygon_centroid:**
-    * Computes the geometric center of a polygon
-  * **scale_polygon:**
-    * Scales a polygon shape in XY (independently) based on a vector2D factor
-  * **polyset_expansion:**
-    * Expands a polyset uniformly around the edges by the given amount. This function can be used to either expand or contract a polyset.
-  * **polyset_combination:**
-    * Compute a combination of two or more polysets. This function can operate as a union, intersection, difference, or exclusive or (xor).
-  * **structure_combination:**
-    * Compute a combination of two or more structures. This function can operate as a union, intersection, difference, or exclusive or (xor).
-  * **structure_2d_expansion:**
-    * Compute the 2D expansion of a structure. The 2D expansion of a structure is computed by independently expanding each slice of the structure within its 2D plane. This function can be used to either expand or contract a structure.
-  * **structure_3d_expansion:**
-    * When computing the 3D expansion of a structure, the structure's slices are allowed to expand into other slices. This function can be used to either expand or contract a structure.
-===== Geometric Primitives =====
-Below is a list of some common creation functions for geometric primitives and a brief explanation of their intended usage (Specific details of each function, argument parameters, and return values are provided at the [[http://docs.dosimetry.dotdecimal.com|Dosimetry App Manifest Guide]]).
-===== Degrader Manipulation =====
-Below is a list of some common degrader manipulation functions and a brief explanation of their intended usage (Specific details of each function, argument parameters, and return values are provided at the [[http://docs.dosimetry.dotdecimal.com|Dosimetry App Manifest Guide]]).
-  * **make_block:**
-    * Create a degrader representing a block. A block has a uniform thickness within its shape and 0 thickness outside. Note that the shape is specified at the downstream edge of the block.
-  * **make_shifter:**
-    * A block has a uniform thickness within its shape and 0 thickness outside. A range shifter is modelled as extending infinitely in the X and Y directions, so its thickness is uniform across the field.
-  * **make_rc:**
-    * Create a degrader representing a range compensator. A range compensator is a degrader whose thickness is specified as an image. The image is specified in the plane of the downstream edge of the RC.
-  * **make_rc_nurb:**
-    * Create a degrader representing a nurbs range compensator. A nurbs range compensator is a degrader whose thickness is specified as a smooth surface. The surface is specified in the plane of the downstream edge of the RC.
-  * **truncate_rc:**
-    * Shifts a range compensator surface such that the minimum thickness is set to the specified value.
-By changing the input (shape, image, etc) passed into the the degrader make functions, the resulting degrader can be manipulated as desired.
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