foot 3 lateral

Question 1

What is a key feature demonstrated in the lateral projection of the foot?

Answer 1

The entire foot, from toes to heel, should be clearly shown.

Question 2

What is the purpose of using a lead protective waist apron in these projections?

Answer 2

To provide radiation protection to the patient.

Question 3

How should the position of the foot be aligned in the dorsi-plantar image?

Answer 3

Long axis of the foot should be aligned to the long axis of the portion of the image receptor being exposed.

Question 3

What anatomy should be demonstrated in the dorsi-plantar image of the foot?

Answer 3

Entire foot, including all phalanges and metatarsals, navicular, cuneiforms, and cuboids.

Question 4

hat should be clearly demonstrated in the dorsi-plantar oblique image of the foot?

Answer 4

Entire foot, from toes to heel, proper rotation showing navicular, lateral cuneiform, and cuboid with less superimposition than in the AP projection, and the tuberosity of the fifth metatarsal.

Question 5

How should the patient be positioned for the lateral projection of the foot?

Answer 5

• Have the patient lie on the radiographic table and turn toward the affected side until the leg and foot are lateral,
• with the opposite leg placed behind the affected leg.
• Center the image receptor to the midfoot and adjust it so that its long axis is parallel with the long axis of the foot.
• Dorsiflex the foot to form a 90⁰ angle with the lower leg.

Question 5

Why should the patient’s heel not touch the image receptor during a lateral foot projection?

Answer 5

To ensure that the medial surface of the foot is parallel with the plane of the image receptor.

Question 6

How should the foot be positioned during the lateral projection?

Answer 6

Dorsiflex the foot to form a 90° angle with the lower leg and place the plantar surface of the forefoot perpendicular to the image receptor.

Question 6

What is the centering point for the lateral projection of the foot?

Answer 6

The base of the third metatarsal.

Question 6

What is the direction of the central ray for the lateral projection of the foot?

Answer 6

Vertical beam 90° to the image receptor.

Question 6

How should the patient be positioned for a dorsi-plantar, weight-bearing projection?

Answer 6

Both feet should be directed straight ahead, parallel to each other, with full weight equally distributed, while standing on the image receptor.

Question 7

What is the direction of the central ray for the dorsi-plantar, weight-bearing projection?

Answer 7

Angle the central ray 15° posteriorly.

Question 7

What are the clinical indications for a dorsi-plantar, weight-bearing projection? (Hallux Valgus)

Answer 7

• To demonstrate the bones of the feet and the condition of the longitudinal arches under full body weight, and to assess injury to structural ligaments such as a Lisfranc joint injury.

Question 7

What anatomy should be demonstrated in the AP projection for hallux valgus?

Answer 7

Bilateral feet from soft tissue surrounding phalanges to distal portion of the talus.

Question 7

What anatomy should be demonstrated in the lateral projection for hallux valgus?

Answer 7

The entire foot along with a minimum of 2 cm of distal tibia-fibula.

Question 7

What exposure criteria ensure a quality image for hallux valgus

Answer 7

Optimal density and contrast should visualize soft tissue and bony borders.

Question 8

What is the centering point for the dorsi-plantar, weight-bearing projection?

Answer 8

Center midpoint between feet at the level of the base of the metatarsals.

Question 9

How is proper angulation demonstrated in the AP projection for hallux valgus?

Answer 9

By open tarsometatarsal joint spaces and visualization of the joint between the first and second cuneiforms.