visual3d:documentation:modeling:segments:hip_joint_landmarks
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| visual3d:documentation:modeling:segments:hip_joint_landmarks [2024/07/12 14:01] – created sgranger | visual3d:documentation:modeling:segments:hip_joint_landmarks [2025/03/20 19:41] (current) – wikisysop | ||
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| - | ====== | + | ====== |
| **Estimates for the Right and Left Hip Joint Center are represented as Landmarks relative to the CODA and V3D_Composite pelvis segment coordinate systems.** | **Estimates for the Right and Left Hip Joint Center are represented as Landmarks relative to the CODA and V3D_Composite pelvis segment coordinate systems.** | ||
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| **NOTE:** RPV_Depth is included in the subject metrics starting in Version 5 and the Target_Radius_ASIS is included in the subject metrics starting in Version 6. | **NOTE:** RPV_Depth is included in the subject metrics starting in Version 5 and the Target_Radius_ASIS is included in the subject metrics starting in Version 6. | ||
| - | In previous versions, these metrics must be added manually | + | In previous versions, these metrics must be added manually. |
| ==== Bell and Brand Hip Joint ==== | ==== Bell and Brand Hip Joint ==== | ||
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| * Since the pelvis depth is defined differently between the CODA and V3D_Composite pelvis, use the set of equations which corresponds to the pelvis type you are using. | * Since the pelvis depth is defined differently between the CODA and V3D_Composite pelvis, use the set of equations which corresponds to the pelvis type you are using. | ||
| - | |Bell & Brand | | + | |**Bell & Brand** |
| - | |CODA Coordinate System| |V3D_Composite Coordinate System | + | | |CODA Coordinate System|V3D_Composite Coordinate System |
| |RHJC | | |RHJC | | ||
| |ML |0.36*ASIS_Distance |0.36*ASIS_Distance | |ML |0.36*ASIS_Distance |0.36*ASIS_Distance | ||
| Line 43: | Line 43: | ||
| **Note that in the 1990 article the ML distance is listed as 0.14 instead of 0.36 as used by Visual3D. The confusion lies in the location of the origin of the pelvis used in the article. Visual3D uses the mid-point of the ASIS, the article uses the Right ASIS location.** | **Note that in the 1990 article the ML distance is listed as 0.14 instead of 0.36 as used by Visual3D. The confusion lies in the location of the origin of the pelvis used in the article. Visual3D uses the mid-point of the ASIS, the article uses the Right ASIS location.** | ||
| - | {{BB90.jpg}} {{BB90a.jpg}} | + | {{:BB90.jpg}} {{:BB90a.jpg}} |
| ==== Harrington Hip Joint ==== | ==== Harrington Hip Joint ==== | ||
| - | //Harrington provided two regression equations for the hip joint landmark// | + | Harrington provided two regression equations for the hip joint landmark. |
| * The second set of equations requires the user to manually measure leg length. If you do not plan to manually measure leg length, use the first set. | * The second set of equations requires the user to manually measure leg length. If you do not plan to manually measure leg length, use the first set. | ||
| * Since the pelvis depth is defined differently between the CODA and V3D_Composite pelvis, use the set of equations which corresponds to the pelvis type you are using. | * Since the pelvis depth is defined differently between the CODA and V3D_Composite pelvis, use the set of equations which corresponds to the pelvis type you are using. | ||
| Line 53: | Line 53: | ||
| === Harrington 1 === | === Harrington 1 === | ||
| - | |Harrington Equation 1 | | || | + | |**Harrington Equation 1** | | || |
| - | |CODA Coordinate System| | + | | |CODA Coordinate System |
| |RHJC | | || | |RHJC | | || | ||
| |ML |0.33*ASIS_Distance + 0.0073 |0.33*ASIS_Distance + 0.0073 | |ML |0.33*ASIS_Distance + 0.0073 |0.33*ASIS_Distance + 0.0073 | ||
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| === Harrington 2 === | === Harrington 2 === | ||
| - | |Harrington Equation 2 | | || | + | |**Harrington Equation 2** | | || |
| - | |CODA Coordinate System| | + | | |
| |RHJC | | || | |RHJC | | || | ||
| |ML |0.28*RPV_Depth + 0.16*ASIS_Distance + 0.0079 | |ML |0.28*RPV_Depth + 0.16*ASIS_Distance + 0.0079 | ||
| Line 88: | Line 88: | ||
| Estimates for the Right and Left Hip Joint Center are represented as Landmarks that are created automatically when the Helen Hayes pelvis segment is created. The location of the landmarks are defined in the Pelvis Segment Coordinate System as: | Estimates for the Right and Left Hip Joint Center are represented as Landmarks that are created automatically when the Helen Hayes pelvis segment is created. The location of the landmarks are defined in the Pelvis Segment Coordinate System as: | ||
| - | |Davis | + | |**Davis ** |
| - | |CODA Coordinate System| | | + | | |
| |RHJC | | | |RHJC | | | ||
| |ML |- (C * sin(theta) -0.5 * ASIS_distance) | |ML |- (C * sin(theta) -0.5 * ASIS_distance) | ||
| Line 99: | Line 99: | ||
| |Axial | |Axial | ||
| - | |Davis - Metric Values | + | |**Davis - Metric Values** | | |
| |If LegLength is measured manually: | |If LegLength is measured manually: | ||
| |LegLength | |LegLength | ||
visual3d/documentation/modeling/segments/hip_joint_landmarks.1720792900.txt.gz · Last modified: 2024/07/12 14:01 by sgranger