Last updated on July 6 2022
Description
Cobb angle is a measurement used for the evaluation of curves in scoliosis on an AP radiographic projection of the spine.
The Cobb Angle measures the angle between the vertebrae of the curve deformity (scoliosis) that have the end plates with the maximum slope. In S-shaped scoliosis (double curve), there are two contiguous curves, the lower-end vertebra of the upper curve represents the upper-end vertebra of the lower curve. The image of the spine must be in the AP view. Scoliosis is defined as a lateral spinal curvature with a Cobb angle of 10° or more.
Measurements
The measurement made by the procedure is displayed in the image:
- Superior Double Cobb Angle (SDCA): the angle between the superior line and the medium line.
- Inferior Double Cobb Angle (IDCA): the angle between the medium line and the inferior line.
Auxiliary references
To show this procedure, PeekMed® needs additional references:
- Superior Line: a line passing through the upper and lower edge of the superior vertebrae of the first curve that has the end plate with the maximum slope;
- Medium Line: a line passing through the upper and lower edge of the inferior vertebrae of the first curve that has the end plate with the maximum slope;
- Inferior Line: a line passing through the upper and lower edge of the inferior vertebrae of the second curve that has the end plate with the maximum slope.
How to perform
After selecting this procedure in the sidebar, you must mark the points to conclude it. To see the caption of each point you need to click on this button 
Beware: you can change the position of the points at this stage or later. To do this, simply click on each handle with the left mouse button and move them to the most suitable position.
This procedure has no advanced configuration.