Related Experiment Videos
Aligning anatomical structure from spiral X-ray computed tomography with plantar pressure data
Mary K Hastings1, Paul K Commean, Kirk E Smith
1Washington University School of Medicine Program in Physical Therapy and Mallinckrodt Institute of Radiology, Room 1101, P.O. Box 8502, 4444 Forest Park Blvd., St. Louis, MO 63108-2212, USA. hastingsm@msnotes.wustl.edu
Clinical Biomechanics (Bristol, Avon)
|October 7, 2003
Summary
This study shows that spiral X-ray computed tomography reliably identifies metatarsal head locations on pressure sensors. This allows for a better understanding of foot pressure distribution and improved orthotic interventions.
Area of Science:
- Biomechanics
- Medical Imaging
- Podiatry
Background:
- Plantar pressure data offer insights into pressure magnitude and general location.
- Precise anatomical identification requires integrating radiological data with pressure sensor recordings.
Purpose of the Study:
- To assess the reliability of pinpointing metatarsal head locations using spiral X-ray computed tomography (CT) on a matrix pressure sensor.
- To establish a method for co-registering radiological and plantar pressure data.
Main Methods:
- Experimental design involving test-retest and within-subject comparisons.
- Plantar pressure testing and spiral X-ray CT scans were performed on 18 subjects (9 healthy, 9 with diabetes and neuropathy).
- A novel registration technique was developed to align CT and pressure sensor data.
Main Results:
- 98% of metatarsal head locations matched exactly or were within one pixel (5.08 mm) between repeated measurements.
- Identical mapping occurred in 53.3% of cases, with 44.4% differing by only one pixel.
Conclusions:
- Spiral X-ray CT data can be reliably co-registered with plantar pressure data.
- This integration enhances understanding of structural influences on peak foot pressure.
- It enables precise 3D foot modeling and improves orthotic design for pressure reduction.