Re: subject-specific implementation of pelvic alignment
Posted: Fri Apr 05, 2024 3:30 pm
Hi Jacob,
Thanks for the comment. I tried different things, but I am having difficulty figuring this out and understanding the solution you suggested. Since sacrum rotates relative to the cs. (superior one in the attached picture), sacrum position seems off when we set PI values around 60 deg. We can technically adjust the translational positions of the pelvis_offset frame of the pelvis_sacrum joint. But, this is going to require several manual iterations to nicely position the sacrum and probably won't be feasible to automate for large datasets. I also realized the coordinate systems in your picture seem different than mine, I can't tell why. The superior one is for the pelvis_sacrum joint, the inferior one is for the ground_pelvis joint.
You mentioned you previously used Matlab API to automate setting spino-pelvic parameters for larger datasets. Will it be possible to share this code? I can perhaps check it out and see the implementation.
If I need to, how can I re-define the location of the pelvis_sacrum joint to be at the mid-sacrum point?
Thank you.
Thanks for the comment. I tried different things, but I am having difficulty figuring this out and understanding the solution you suggested. Since sacrum rotates relative to the cs. (superior one in the attached picture), sacrum position seems off when we set PI values around 60 deg. We can technically adjust the translational positions of the pelvis_offset frame of the pelvis_sacrum joint. But, this is going to require several manual iterations to nicely position the sacrum and probably won't be feasible to automate for large datasets. I also realized the coordinate systems in your picture seem different than mine, I can't tell why. The superior one is for the pelvis_sacrum joint, the inferior one is for the ground_pelvis joint.
You mentioned you previously used Matlab API to automate setting spino-pelvic parameters for larger datasets. Will it be possible to share this code? I can perhaps check it out and see the implementation.
If I need to, how can I re-define the location of the pelvis_sacrum joint to be at the mid-sacrum point?
Thank you.