Leg-Length Discrepancy
LLD Finder
Know the difference to the millimeter.
LLD Finder measures the length of each leg on a standing X-ray. It tells you which leg is shorter and by how much. It breaks the result down by segment, so you can see whether the discrepancy comes from the femur, the tibia, or both.
Sample measurements
- Femur length
- 452 mm
- Tibia length
- 371 mm
- Full leg length
- 823 mm
- Leg-length discrepancy
- 9 mm
- Accurate
- 1.4mm
- Mean absolute error on lengths, against expert radiologists
- Fast
- 3s
- Upload to full report. Manual: 10-15 min
- Comprehensive
- 6
- Lengths per study, for both legs
See it in action
Right and left, in mm
What it measures
Femur length
Femoral head to intercondylar fossa
Tibia length
Intercondylar eminence to tibial plafond
Full leg length
Femoral head to tibial plafond
Leg-length discrepancy
The difference between the two sides, shown on the shorter leg
Highlights
Built for review and control
- Segment-level results, not only a total
- Pixel-to-millimeter calibration
- Landmark review and manual adjustment before confirming
- Fits follow-up in pediatric orthopedics, post-fracture and arthroplasty assessment, and monitoring of treatment such as lengthening
Workflow
One workflow for every product
All four products follow the same steps, from the first upload to the finished report.
- Upload
- AI detection
- Review and edit
- Confirm
- Report
Ready to see it on your own images?
Ask for a demo and we will walk you through the workflow.