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Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
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Detection and Characterization of Endplate Structural Defects on CT: A Diagnostic Accuracy Study.
Aliyu Lawan1, Andrew Leung2, Stephanie Leung2
1Faculty of Health Sciences, School of Physical Therapy, and Western's Bone and Joint Institute, Western University, London, ON, Canada.
Spine
|January 29, 2024
Summary
This study found that while two methods for assessing endplate structural defects (EPSD) showed good reliability for detecting their presence, they often misclassified specific defect types. Neither method fully captured all EPSD phenotypes for optimal accuracy.
Area of Science:
- Orthopedics and Imaging Science
- Biomedical Engineering
- Radiology
Background:
- Endplate structural defects (EPSD) are implicated in back pain pathophysiology.
- Current clinical imaging methods for EPSD lack validation, creating uncertainty in diagnostic interpretation.
Purpose of the Study:
- To evaluate the reliability and diagnostic accuracy of two established methods for assessing endplate structural defects (EPSD).
Main Methods:
- 418 endplates from 19 cadavers were independently assessed by radiologists and a novice using two EPSD methods on CT scans.
- Micro-CT (µCT) was used as a reference standard, with assessments performed by an independent rater with high intra-rater reliability (k=0.96).
Main Results:
- Good inter-rater reliability was found for EPSD presence (k=0.60-0.69), but fair for specific phenotypes (k=0.43-0.58).
- CT methods frequently missed certain defects like endplate fractures and corner defects compared to µCT.
- Sensitivity and specificity varied by method, with Feng's method achieving 70.9% sensitivity and 79.1% specificity, and Brayda-Bruno's achieving 79.5% sensitivity and 57.5% specificity for EPSD presence.
Conclusions:
- Both methods demonstrated good inter-rater reliability and criterion validity for detecting the presence of EPSD.
- Neither assessment method comprehensively included all necessary EPSD phenotypes, leading to frequent misclassifications.
- Further refinement of EPSD assessment methods is needed for improved diagnostic accuracy.
