visual3d:tutorials:modeling:modeling_the_thorax
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| visual3d:tutorials:modeling:modeling_the_thorax [2024/06/26 20:31] – created sgranger | visual3d:tutorials:modeling:modeling_the_thorax [2024/07/17 15:47] (current) – created sgranger | ||
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| - | ====== | + | ====== |
| This page covers how to implement two different models of the thorax using Visual3D. | This page covers how to implement two different models of the thorax using Visual3D. | ||
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| **Note:** Minor changes were made to the recommendation to facilitate its implementation in Visual3D and for consistency with other commonly used coordinate systems. Users are encouraged to adapt these to their own needs and requirements. The following should mainly be used as a starting point, and not as the only way to define the Thorax segment. | **Note:** Minor changes were made to the recommendation to facilitate its implementation in Visual3D and for consistency with other commonly used coordinate systems. Users are encouraged to adapt these to their own needs and requirements. The following should mainly be used as a starting point, and not as the only way to define the Thorax segment. | ||
| - | {{Thorax_ab_1.jpg}} | + | {{:Thorax_ab_1.jpg}} |
| === Anatomical Landmarks === | === Anatomical Landmarks === | ||
| Line 52: | Line 52: | ||
| - Click **Apply.** | - Click **Apply.** | ||
| - | {{MID_IJCV7.png}}\\ | + | {{:MID_IJCV7.png}}\\ |
| Line 75: | Line 75: | ||
| - Click **Apply.** | - Click **Apply.** | ||
| - | {{THORAX_X.png}}\\ | + | {{:THORAX_X.png}}\\ |
| Line 96: | Line 96: | ||
| - Click on **Build Model** | - Click on **Build Model** | ||
| - | {{THORAXTUSEGDEF.png}} | + | {{:THORAXTUSEGDEF.png}} |
| === Scaling the thorax' | === Scaling the thorax' | ||
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| **Note:** The scaling and position (move) values are specific to this tutorial' | **Note:** The scaling and position (move) values are specific to this tutorial' | ||
| - | {{THORAX_SEG.png}} | + | {{:THORAX_SEG.png}} |
| === ISB's exact coordinate system === | === ISB's exact coordinate system === | ||
| Line 133: | Line 133: | ||
| - Click **Apply.** | - Click **Apply.** | ||
| - | {{THORAX_ISB_Z.png}} | + | {{:THORAX_ISB_Z.png}} |
| To create the **THORAX_ISB_Y** landmark: | To create the **THORAX_ISB_Y** landmark: | ||
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| - Click **OK** | - Click **OK** | ||
| - | {{THORAX_ISB.png}} | + | {{:THORAX_ISB.png}} |
| ==== RAB Thorax Model ==== | ==== RAB Thorax Model ==== | ||
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| === Iliac Crest Landmarks === | === Iliac Crest Landmarks === | ||
| - | The Iliac Crest Landmarks were estimated using the [[Visual3D: | + | The Iliac Crest Landmarks were estimated using the [[Visual3D: |
| **Kepple TM, Sommer HJ, Siegel KL, Standhope SJ** (1998) A three-dimensional musculoskeletal database for the lower extremities. Journal of Biomechanics 31, pp 77-80 | **Kepple TM, Sommer HJ, Siegel KL, Standhope SJ** (1998) A three-dimensional musculoskeletal database for the lower extremities. Journal of Biomechanics 31, pp 77-80 | ||
| Line 197: | Line 197: | ||
| From the Terry dataset the perpendicular distance from the x-axis to the mid-point of the PSIS landmarks (Terry landmarks 3&4) is approximately 143.5 | From the Terry dataset the perpendicular distance from the x-axis to the mid-point of the PSIS landmarks (Terry landmarks 3&4) is approximately 143.5 | ||
| In Visual3D create a Subject/ | In Visual3D create a Subject/ | ||
| - | {{Rab6.jpg}} | + | {{:Rab6.jpg}} |
| The y-component of the **RIGHT_ILIAC** landmark in Pelvis coordinates is (-54.477)*ASIS_SACR/ | The y-component of the **RIGHT_ILIAC** landmark in Pelvis coordinates is (-54.477)*ASIS_SACR/ | ||
| Create the **RIGHT_ILIAC** Landmark using these values as. | Create the **RIGHT_ILIAC** Landmark using these values as. | ||
| - | {{Rab7.jpg}} | + | {{:Rab7.jpg}} |
| In Summary: | In Summary: | ||
| Line 216: | Line 216: | ||
| AP= (-54.477)*ASIS_SACR/ | AP= (-54.477)*ASIS_SACR/ | ||
| AXIAL= (33.1)*ASIS_DISTANCE/ | AXIAL= (33.1)*ASIS_DISTANCE/ | ||
| - | {{Rab8.jpg}} | + | {{:Rab8.jpg}} |
| === Construct the segment === | === Construct the segment === | ||
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| - Click on **Build Model** | - Click on **Build Model** | ||
| - | {{Rab11.jpg}} | + | {{:Rab11.jpg}} |
| You should now see a thorax segment on your standing model. If you do not see the thorax segment after clicking Build Model, double check the values you entered in the last step. | You should now see a thorax segment on your standing model. If you do not see the thorax segment after clicking Build Model, double check the values you entered in the last step. | ||
| - | {{Rab12.jpg}} | + | {{:Rab12.jpg}} |
| Note that the Z-axis of the segment (Blue Line) is pointing down, so we must fix that. | Note that the Z-axis of the segment (Blue Line) is pointing down, so we must fix that. | ||
| - | {{Rab13.jpg}} | + | {{:Rab13.jpg}} |
| Switch to the segment properties tab, select the Thorax/Ab segment in the combo box, and select Modify Segment Coordinate System. | Switch to the segment properties tab, select the Thorax/Ab segment in the combo box, and select Modify Segment Coordinate System. | ||
| - | {{Rab14.jpg}} | + | {{:Rab14.jpg}} |
| Select the AP direction to be -Y and the AXIAL direction to be -Z | Select the AP direction to be -Y and the AXIAL direction to be -Z | ||
| Line 254: | Line 254: | ||
| Placing the proximal end of the thorax/ab segment at the pelvis essentially places two proximal ends together (e.g. the Thorax/Ab and Pelvis), but now the distal end of the Thorax/Ab segment is at the shoulders, which allows the creation of shoulder and neck joints (e.g. the arms and head are considered distal segments of the body). | Placing the proximal end of the thorax/ab segment at the pelvis essentially places two proximal ends together (e.g. the Thorax/Ab and Pelvis), but now the distal end of the Thorax/Ab segment is at the shoulders, which allows the creation of shoulder and neck joints (e.g. the arms and head are considered distal segments of the body). | ||
| - | {{Rab15.jpg}} | + | {{:Rab15.jpg}} |
| ==== References ==== | ==== References ==== | ||
visual3d/tutorials/modeling/modeling_the_thorax.1719433895.txt.gz · Last modified: 2024/06/26 20:31 by sgranger