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Radiograph-based intervertebral sagittal translation-to-canal diameter ratio as a quantitative imaging marker for
1Orthopaedics, Zigong Fourth People's Hospital, Zigong, China. 374648027@qq.com.
Summary
The translation-to-canal diameter ratio (TCDR) effectively identifies lower cervical instability on radiographs. This quantitative marker shows high sensitivity and specificity, aiding in diagnosing this condition.
Area of Science:
- Radiology
- Orthopedic Surgery
- Spinal Imaging
Background:
- Lower cervical instability presents diagnostic challenges.
- Quantitative radiographic markers are needed for accurate assessment.
- Distinguishing symptomatic from asymptomatic segments is crucial.
Purpose of the Study:
- To compare radiographic features of symptomatic lower cervical instability with asymptomatic segments.
- To evaluate the translation-to-canal diameter ratio (TCDR) as a quantitative marker for lower cervical instability.
Main Methods:
- Retrospective study of 180 patients with suspected lower cervical instability and 60 asymptomatic controls.
- Measurement of intervertebral sagittal translation, canal diameter, angulation, and TCDR.
- Statistical analysis including ROC analysis and logistic regression.
Main Results:
- TCDR was significantly higher in the lower cervical instability group (0.170 ± 0.066) compared to controls (0.067 ± 0.060).
- TCDR demonstrated excellent discriminative ability (AUC 0.889) with 91.11% sensitivity and 72.08% specificity.
- TCDR outperformed other radiographic measures and was independently associated with instability.
Conclusions:
- Radiograph-based TCDR is a valuable quantitative marker for diagnosing lower cervical instability.
- TCDR offers good segment-level discriminative ability.
- This ratio can serve as an adjunctive tool for assessing responsible segments in lower cervical instability.