Foot and Ankle Imaging Review

Flashcards based on foot and ankle imaging concepts covered in the lecture.

What is the central ray location for imaging the foot?

The central ray is located at the base of the third metatarsal.

What arch does the lateral view of the foot best demonstrate?

The longitudinal arch.

What type of foot projection is indicated when the metatarsophalangeal joints are open?

AP axial foot projection.

What is the CR angle for an oblique foot projection?

Zero degrees, or perpendicular to the image receptor.

How many degrees should the foot be rotated for an AP oblique projection?

About 30 to 45 degrees.

What does a good mortise view of the ankle allow you to see?

It shows the entire dome of the talus and ensures that the tibia and fibula are parallel.

What is the CR location for a lateral ankle projection?

The CR is located about 1 inch distal to the medial malleolus.

What projection is performed to visualize the calcaneus?

Plantodorsal projection.

What is the angle for the plantodorsal projection of the calcaneus?

40 degrees cephalad.

What determines the positioning of the scapula for the Grashey method?

The scapula must be parallel to the IR for proper visualization of the glenoid cavity.

What identifies an internal rotation of the humerus on an image?

Visualization of the lesser tubercle and the palm facing the thigh.

What type of projection is done to visualize the patella tangentially?

Sunrise view, also known as Settegast method.

What is the degree of rotation for an AP oblique view of the foot?

45 degrees for a medial oblique view.

What does it mean if the condyles of the femur are not superimposed in a knee image?

It indicates that an angle is likely needed to visualize the joint space.