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--- electronrt:userguide:tutorials:electron_blocks [2021/07/29 18:28] – external edit 127.0.0.1
+++ electronrt:userguide:tutorials:electron_blocks [2022/04/18 19:12] (current) – Image size edit anegron
@@ Line 3: / Line 3: @@
 Here the user can create and edit Electron Blocks for the selected beam as well as edit values for an existing block.
-<imgcaption beams_electron_block|Block size selection>{{ :electronrt:userguide:tutorials:decimal_electronrt_beams_block.png?direct&400 }}</imgcaption>
+<imgcaption beams_electron_block|Electron block controls>{{ :electronrt:userguide:tutorials:decimal_electronrt_collimation.png }}</imgcaption>
 ===== Block Size =====
@@ Line 11: / Line 11: @@
 **Note:** When first creating a beam the eRT app will auto calculate the smallest block that will fit the current aperture shape.
-<imgcaption beams_electron_block_sizes|Block size options>{{ :electronrt:userguide:tutorials:decimal_electronrt_beams_block_sizes.png?direct&400 }}</imgcaption>
+<imgcaption beams_electron_block_sizes|Block size options>{{ :electronrt:userguide:tutorials:decimal_electronrt_beams_block_sizes.png }}</imgcaption>
 **Note** Selecting a block size that is too small for the aperture shape will cause an error that will not allow the creation/saving of the beam until an appropriate size is selected.
@@ Line 25: / Line 25: @@
 <imgcaption block_target_margin|Block target margin>{{ :electronrt:userguide:tutorials:decimal_electronrt_beams_block_target_margin.png?direct&400 }}</imgcaption>
+===== Primitive Shape =====
+Instead of using the geometric target, the user may use a primitive shape as the base block opening instead. The user can choose the shape (square, circle, rectangle, or oval) and the dimensions at isocenter.
+<imgcaption primitive_shape|Primitive shape controls>{{ :electronrt:userguide:tutorials:decimal_electronrt_beams_primitive_oval.png?direct&800 }}</imgcaption>
 ===== Avoidance Structures =====