A 5- to 7-degree central ray angulation is used for a lateral knee projection
1)to project the medial condyle anterosuperiorly.
2)on a patient with a narrow pelvis and long femora.
3)to offset the reduction in medial inclination that occurs when the patient is in a lateral recumbent position.
4)to achieve an open femorotibial joint space.
A) 1 and 2 only
B) 2 and 3 only
C) 1, 3, and 4 only
D) 2, 3, and 4 only

Question

Quizplus · Accepted Answer

A 5- to 7-degree central ray angulation is used for a lateral knee projection to achieve 1) projecting the medial condyle anterosuperiorly, 3) offsetting the reduction in medial inclination that occurs when the patient is in a lateral recumbent position, and 4) achieving an open femorotibial joint space. It is not used specifically for patients with a narrow pelvis and long femora. Therefore, the correct choices are 1, 3, and 4 only, which are all achieved through a 5- to 7-degree central ray angulation.

A 5- to 7-Degree Central Ray Angulation Is Used for a Lateral