visual3d:documentation:modeling:segments:normalizing_the_pelvis_segment_angle_example
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| visual3d:documentation:modeling:segments:normalizing_the_pelvis_segment_angle_example [2024/06/19 13:58] – created sgranger | visual3d:documentation:modeling:segments:normalizing_the_pelvis_segment_angle_example [2024/07/17 15:45] (current) – created sgranger | ||
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| - | ===== Normalizing the Pelvis Segment Angle ===== | + | ====== Normalizing the Pelvis Segment Angle Example |
| + | |||
| + | ==== Normalizing the Pelvis Segment Angle ==== | ||
| The Coda and Helen Hayes pelvis are tilted forward approximately 20 degrees from the horizontal. | The Coda and Helen Hayes pelvis are tilted forward approximately 20 degrees from the horizontal. | ||
| Line 5: | Line 7: | ||
| In describing the orientation of the pelvis or for describing the hip joint angle, it is often convenient to define a pelvis angle that has a coronal plane parallel to the floor (eg a vertical segment with zero tilt). | In describing the orientation of the pelvis or for describing the hip joint angle, it is often convenient to define a pelvis angle that has a coronal plane parallel to the floor (eg a vertical segment with zero tilt). | ||
| - | ==== Step 1. Create landmarks along the Iliac Crest vertically above the hip joint landmarks. | + | === Step 1. Create landmarks along the Iliac Crest vertically above the hip joint landmarks. === |
| - | {{SegmentExample4_8.png}}\\ | + | {{:SegmentExample4_8.png}}\\ |
| Note that the Z edit box contains the subject metric **0.5*ASIS_DISTANCE** there are no strict dimensions, but it is convenient to base it partly on the subjects size. Note that this will end up being the length of a virtual pelvis segment, and will not be used for any inverse dynamics calculations, | Note that the Z edit box contains the subject metric **0.5*ASIS_DISTANCE** there are no strict dimensions, but it is convenient to base it partly on the subjects size. Note that this will end up being the length of a virtual pelvis segment, and will not be used for any inverse dynamics calculations, | ||
| - | {{SegmentExample4_9.png}}\\ | + | {{:SegmentExample4_9.png}}\\ |
| Create a left iliac crest landmark | Create a left iliac crest landmark | ||
| - | {{SegmentExample4_10.png}}\\ | + | {{:SegmentExample4_10.png}}\\ |
| - | ==== Step 2. Create a Visual3D pelvis that is kinematic only. ==== | + | === Step 2. Create a Visual3D pelvis that is kinematic only. === |
| - | {{SegmentExample4_11.png}}\\ | + | {{:SegmentExample4_11.png}}\\ |
| use the hip landmarks and the iliac crest landmarks | use the hip landmarks and the iliac crest landmarks | ||
| - | {{SegmentExample4_12.png}}\\ | + | {{:SegmentExample4_12.png}}\\ |
| Use Coda pelvis tracking markers LASI, RASI, SACR | Use Coda pelvis tracking markers LASI, RASI, SACR | ||
| - | {{SegmentExample4_13.png}}\\ | + | {{:SegmentExample4_13.png}}\\ |
| Line 43: | Line 45: | ||
| For example, | For example, | ||
| - | {{SegmentExample4_14.png}} | + | {{:SegmentExample4_14.png}} |
visual3d/documentation/modeling/segments/normalizing_the_pelvis_segment_angle_example.1718805489.txt.gz · Last modified: 2024/06/19 13:58 by sgranger