Torg-Pavlov Ratio (Cervical Stenosis)
Torg-Pavlov ratio (1987) = sagittal spinal-canal diameter / vertebral-body diameter on a lateral cervical radiograph; <= 0.8 indicates developmental cervical canal stenosis.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Spinal-canal sagittal diameter
- 12 mm
- Vertebral-body sagittal diameter
- 17 mm
Result: Torg-Pavlov ratio 0.71 — developmental cervical stenosis (<= 0.8).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- > 0.8
- Not stenotic.
- <= 0.8
- Developmental cervical canal stenosis (canal / vertebral-body diameter); can overstate stenosis with large bodies. A radiographic ratio, not a diagnosis.
What you enter
- Spinal-canal sagittal diameter
- Vertebral-body sagittal diameter
How this is calculated
Pavlov H, Torg JS, Robie B, Jahre C. Cervical spinal stenosis: determination with vertebral body ratio method. Radiology. 1987;164(3):771-775. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.