For a 15- to 20-degree internally rotated AP oblique ankle projection, the
1)central ray is centered at the level of the medial malleolus.
2)foot is dorsiflexed to a 90-degree angle with the lower leg.
3)long axis of the lower leg is aligned with the long axis of the collimated field.
4)leg is internally rotated until the intermalleolar line is parallel with the IR.
A) 1 and 2 only
B) 2 and 4 only
C) 1 and 3 only
D) 1, 2, 3, and 4

Question

Quizplus · Accepted Answer

For a 15- to 20-degree internally rotated AP oblique ankle projection, the central ray is indeed centered at the level of the medial malleolus to best visualize the ankle joint. The foot should be dorsiflexed to a 90-degree angle with the lower leg to ensure a true anteroposterior (AP) view. Aligning the long axis of the lower leg with the long axis of the collimated field ensures that the entire area of interest is within the x-ray beam and properly imaged. Internally rotating the leg until the intermalleolar line is parallel with the image receptor (IR) is crucial for obtaining an accurate oblique view of the ankle, as it positions the ankle in the correct orientation for the projection.

For a 15- to 20-Degree Internally Rotated AP Oblique Ankle