Last updated on August 1 2024
Description
The Caput-collum-diaphyseal (CCD) Angle is the angle between the femoral neck axis and the femoral shaft axis.
The normal femoral neck shaft angle in children changes with age: it is approximately 150° at birth and then gradually decreases to 130° by adulthood. It is important to keep the patient in the correct position when taking the x-ray: the leg must be kept in a neutral position and the patella must face forward because external rotation of the leg increases the projected femoral neck shaft angle and internal rotation decreases it.
This procedure is only available in the AP view.
Measurements
- CCD: the angle between the femoral neck axis and the femoral shaft axis.
Auxiliary references
- Anatomical Axis of the Femur (AAF): a line from the center of the proximal femur to the center of the distal femur;
- Femoral Neck Axis (FNA): a line from the center of proximal femur to the center of distal femur.
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.