Question

On a patella skyline image, the patellofemoral joint space is closed. To better superimpose the apex and based of the patella borders, the angle of the central ray can be ____ or the flexion of the knee can be ____

Answer 1

On a patella skyline image, the angle of the central ray or the flexion of the knee can be adjusted to better superimpose the apex and base of the patella borders if the patellofemoral joint space is closed.

Step-by-step explanation:

On a patella skyline image, if the patellofemoral joint space is closed, there are two ways to better superimpose the apex and base of the patella borders:

1. The angle of the central ray can be adjusted:
2. If the apex of the patella is superior to the base, the angle of the central ray needs to be decreased.
3. If the apex of the patella is inferior to the base, the angle of the central ray needs to be increased.
4. The flexion of the knee can be adjusted:
5. If the apex of the patella is superior to the base, the flexion of the knee needs to be increased.
6. If the apex of the patella is inferior to the base, the flexion of the knee needs to be decreased.