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 [2024/06/18 13:29] – sgranger | visual3d:documentation:modeling:segments:hip_joint_landmarks [2024/07/17 15:45] (current) – created sgranger | ||
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| + | ====== Hip Joint Landmarks ====== | ||
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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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| - The only difference between the equations for the CODA and V3D_Composite pelvis segments is that there is an offset (0.5*RPV_Depth-Target_Radius_ASIS). This is because the origin of the V3D_Composite pelvis is 50% of pelvis depth compared to the CODA pelvis origin. | - The only difference between the equations for the CODA and V3D_Composite pelvis segments is that there is an offset (0.5*RPV_Depth-Target_Radius_ASIS). This is because the origin of the V3D_Composite pelvis is 50% of pelvis depth compared to the CODA pelvis origin. | ||
| - | ==== Model Metrics | + | === Model Metrics === |
| You will see the following model metrics used in the equations below. These model metrics are automatically created when you create the CODA or V3D_Composite pelvis. | You will see the following model metrics used in the equations below. These model metrics are automatically created when you create the CODA or V3D_Composite pelvis. | ||
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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 ==== |
| When you create the CODA or V3D_Composite pelvis, the hip joint landmarks are automatically created using the Bell and Brand regression equations. | When you create the CODA or V3D_Composite pelvis, the hip joint landmarks are automatically created using the Bell and Brand regression equations. | ||
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| **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{{/ | + | {{:BB90.jpg}} {{:BB90a.jpg}} |
| - | ===== Harrington Hip Joint ===== | + | ==== Harrington 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. | ||
| - | ==== Harrington 1 ==== | + | === Harrington 1 === |
| |Harrington Equation 1 | | || | |Harrington Equation 1 | | || | ||
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| |Axial | |Axial | ||
| - | ==== Harrington 2 ==== | + | === Harrington 2 === |
| |Harrington Equation 2 | | || | |Harrington Equation 2 | | || | ||
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| **Harrington ME, Zavatsky AB, Lawson SE, Yuan Z, Theologis TN.**(2007) Prediction of the hip joint centre in adults, children, and patients with cerebral palsy based on magnetic resonance imaging. | **Harrington ME, Zavatsky AB, Lawson SE, Yuan Z, Theologis TN.**(2007) Prediction of the hip joint centre in adults, children, and patients with cerebral palsy based on magnetic resonance imaging. | ||
| J Biomech. 2007; | J Biomech. 2007; | ||
| - | ===== Davis Hip Joint ===== | + | ==== Davis Hip Joint ==== |
| If no clinical measurements are taken, the following values are calculated: | If no clinical measurements are taken, the following values are calculated: | ||
visual3d/documentation/modeling/segments/hip_joint_landmarks.1718717351.txt.gz · Last modified: 2024/06/18 13:29 by sgranger