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Screening of Axonal Degeneration in Carpal Tunnel Syndrome Using Ultrasonography and Nerve Conduction Studies
Published on: January 11, 2019
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Three-dimensional carpal alignment: computer-aided CT analysis of carpal axes and normal ranges
Theresa E K Höglund1, Robert M J Sippo1, Eero Waris1,2
1Department of Hand Surgery, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.
The Journal of Hand Surgery, European Volume
|March 17, 2023
Summary
This study defines 3D carpal bone axes using CT scans, establishing normal radiocarpal angles for asymptomatic wrists. These findings offer a reliable method for assessing carpal alignment in wrist pathologies.
Area of Science:
- Orthopedics
- Radiology
- Biomechanical Engineering
Background:
- Traditional carpal alignment assessment relies on 2D radiographic measurements.
- A need exists for precise, 3D quantitative analysis of carpal bone orientation.
Purpose of the Study:
- To define three-dimensional (3D) axes for carpal bones using CT data.
- To establish normal radiocarpal angles in asymptomatic wrists.
- To report the reliability of a computer-aided 3D analysis for carpal alignment.
Main Methods:
- Segmentation and numerical modeling of CT data from 121 asymptomatic wrists.
- Definition of geometric axes for radius, scaphoid, and capitate.
- Definition of axes perpendicular to articular surfaces for other carpal bones.
Main Results:
- Provided mean sagittal and coronal radiocarpal angles for all carpal bones.
- Demonstrated excellent intra-observer reliability (intraclass correlation coefficient 0.98).
- Established a database of normal 3D carpal alignment values.
Conclusions:
- This study offers guidelines for 3D carpal alignment measurement.
- The generated normal values can aid in analyzing wrist pathologies.
- The computer-aided analysis provides a reliable method for quantifying carpal alignment.
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