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Published on: July 2, 2021
A Comparison of Imaging Outcomes From 2 Weightbearing CT Modalities
Michael P Smolinski1, Joeseph Amadio1, Victor Prisk2
1University of Pittsburgh, Pittsburgh, PA, USA.
Weightbearing computed tomography (CT) can now be acquired using a horizontal CT system with a novel pedal mechanism. This adaptation increases accessibility for diagnosing foot and ankle injuries without new equipment.
Area of Science:
- Orthopedics
- Radiology
- Medical Imaging
Background:
- Weightbearing computed tomography (CT) offers improved insight into foot and ankle pathologies.
- Availability of weightbearing CT has been limited.
- Horizontal bore CT systems may be adapted for weightbearing imaging.
Purpose of the Study:
- To determine if a horizontal CT system can produce comparable results to standing CT for foot and ankle imaging.
- To assess the feasibility of using a pedal-based loading mechanism in a horizontal CT system.
Main Methods:
- 10 subjects underwent three CT scans: standing, horizontal CT with pedal resistance, and horizontal CT without pressure.
- Standard foot and ankle measures were calculated from the images.
Main Results:
- No statistically significant difference was found between standing and pedal-based horizontal CT scans.
- Navicular height and axial Meary angle differed significantly from nonweightbearing scans in both systems.
- Horizontal CT showed significant differences from nonweightbearing for IM angle, talocalcaneal angle, and talonavicular coverage.
Conclusions:
- A pedal-based loading mechanism can adapt a horizontal-bore CT system for weightbearing imaging.
- This adaptation can improve the availability of weightbearing CT scans for diagnosing foot and ankle injuries.
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