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--- planning:userguide:tutorials:patient_geometry [2017/06/19 20:03] – created dpatenaude
+++ planning:userguide:tutorials:patient_geometry [2021/07/29 18:28] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ====== Patient Geometry ======
+===== Patient / External Structure =====
+The Patient or External structure is one of key importance in Astroid. This structure is used to define the extents of the dose calculation process. This includes the extents of the dose grid, as well as useful area of the CT images for the purposes of Relative Stopping Power conversion. Planners should be aware that all area outside of the External contour is considered to have an RSP value of 0.001 (air). As a result please ensure that any devices that need to be considered in the calculation such as: patient immobilization or positioning devices or the couch are contoured as part the external contour if they will be present during treatment and may impact the delivery beams. Please note in the example below how the planner included the head holder, mask, and S-frame as part of the External contour so that all of these devices will be included in the dose calculations. The couch was safely excluded in this example because no "through couch" beams were going to be used in this treatment. This "air" override is applied **BEFORE** any manual user overrides are applied.
+ {{ :planning:userguide:tutorials:externalcontout.png?800 |}}
 ====== Structures ======
 Within Astroid the planner has the ability to create additional structures that may be needed when building a treatment plan. The Astroid Planning App allows for new structure creation using modifications of existing structures only. These modifications include boolean combinations, expansions/contractions, rinds, and clipping (i.e. splitting by a plane).
 ===== General Structure Options =====
@@ Line 44: / Line 50: @@
   - Open the //Patient Geometry// block
     - This will open the patient //Structures// list
-  - Click the //Create New Structure// button at the bottom of the list <WRAP center>{{ :planning:userguide:tutorials:structure2.png?200 |}}</WRAP>
+  - Click the //Create New Structure// button at the bottom of the list <WRAP center></WRAP>
   - Next, choose the //Type// of structure that should be created from the drop down menu at the top (or leave this blank to "inherent" the type from the base structure) <WRAP center>{{ :planning:userguide:tutorials:create_structures_type.png?200 |}}</WRAP>
   - Change the //Color// and enter a //Description// if desired
   - Then, select the method of creation desired for the new structure: //Combination, Expansion, Rind//, or //Clipped// (see above for details about each method)
   - Choose the required structures and enter any other required information for this method and then click //Create// to complete the new structure
-    - For this expansion structure, the base structure and the expansion amount are all that is required {{ :planning:userguide:tutorials:create_structures_expansion.png?300 |}}
+    - For this expansion structure, the base structure and the expansion amount are all that is required
   - Once a structure has been created, it can be edited, cloned, or deleted by clicking on the structure and then clicking on the appropriate button {{ :planning:userguide:tutorials:structure_geometry_edit.png?300 |}}
     - Note that when editing a structure, only simple options are immediately presented to the user, if further editing of the structure is needed, simply click on //more options// to open the full structure editing task which allows for editing of all structure options {{ :planning:userguide:tutorials:structure_geometry_edit_options.png?300 |}}
@@ Line 65: / Line 71: @@
   * **Description**: Optional, user specified text describing the new structure
-=== Working with Points ===
+===== Working with Points =====
   - Open the //Patient Geometry// block
-  - Click the //Create New Point// at the bottom of the //Patient Geometry// box {{ :planning:userguide:tutorials:create_new_point.png?300 |
+  - Click the //Create New Point// at the bottom of the //Patient Geometry// box
+  - Next, choose the //Type// of point that should be created from the drop down menu at the top
- }}
-  - Next, choose the //Type// of point that should be created from the drop down menu at the top {{ :planning:userguide:tutorials:point_type.png?300 |}}
   - Change the point //Color// and enter a //Description// if desired
   - Next choose the point location- //Centroid// or //Explicit//
     - //Centroid// will place the point in the center of the structure chosen from the drop down list at the bottom of the Geometry box {{ :planning:userguide:tutorials:point_centroid.png?300 |}}
-    - //Explicit// allows the user to place a point anywhe}}re within the patient. The user will may enter the point coordinates in the XYZ axis (The XYZ normal vector directions refer to patient coordinates so that X is left-right, Y is ant-post, and Z is inf-sup) or may simply click on a display to enter the point {{ :planning:userguide:tutorials:point_explicit.png?300 |
+    - //Explicit// allows the user to place a point anywhere within the patient. The user will may enter the point coordinates in the XYZ axis (The XYZ normal vector directions refer to patient coordinates so that X is left-right, Y is ant-post, and Z is inf-sup) or may simply click and drag on a display to select the location of the point. {{ :planning:userguide:tutorials:point_explicit.png?300 |
 }}