How did Clinical Graphics determine the range of motion target end points?
The target end points for each of the motion tests were derived from the range of motion analysis of 81 asymptomatic adult hip joints (42 male, 39 female). For each motion test the average range of motion was determined and rounded to a multiple of 10.
Because the motion simulations do not take into account soft tissue constraints there are four motion tests for which the target end points have been further limited.
These motion tests and reduced target end points are:
Internal Rotation: reduced target of 50°
Internal Rotation with 50 degrees of Abduction: reduced target of 40°
External Rotation with 50 degrees of Abduction: reduced target of 40°
Extension with 15 degrees of External Rotation: reduced target of 15°
Motion simulations beyond these end points appear unrealistic and may erroneously raise a concern of joint hypermobility, which is beyond the capabilities of the motion simulation software.
CT image related questions
- Rejection due to lack of knee images
- Why does Clinical Graphics reject imaging with short femurs?
- Why is imaging of both hips required for a report of one joint side?
- What type of CT image reconstruction is preferred (continuous or overlap)?
- Does Clinical Graphics include pelvic tilt in its simulations?
- What are the dimensions of the field of view reconstruction for CT scans?
MRI image related questions
- Does Clinical Graphics take soft tissue into account?
- Does Clinical Graphics include pelvic tilt in its simulations?
- Rejection due to lack of knee images
- Why does Clinical Graphics reject imaging with short femurs?
- Can I use intra-articular gadolinium for MRI scans?
- Why is there a surcharge for processing MRI image data?
PDF report general questions
Report delivery time related questions
Range of motion simulation related questions
- How did Clinical Graphics determine the range of motion target end points?
- I see a big cam, but there’s no intersection zone visualized?
- Does Clinical Graphics include pelvic tilt in its simulations?
- Are the simulations based on a fixed center of rotation for the hip?
- How accurate are these simulations?