Radiologic 1 - Measurements

Question 1

_____ arise from the direction of the central beam leaving the tube, penetrating the body part, and landing on the X ray plate.

Answer 1

Projections

Question 2

____ arise from the “ view” of the plate after it has been exposed by the central beam.

Answer 2

Views

Question 3

How do you find the metatarsus adductus angle? What is normal?

Answer 3

midfoot bisection WRT bisection of 2nd metatarsal; 10-15 degrees

Question 4

How do you find the metatarsal parabola? What is its normal angle?

Answer 4

connect points from distal 1st to 2nd to 5th metatarsal heads; 140 degrees

Question 5

How do you find the metatarsal declination angle? What is its normal angle?

Answer 5

bisection 1st metatarsal WRT WB surface; 23 degrees

This is the same as the talar declination angle, but you bisect talar head instead of 1st met

Question 6

How do you find the Meary’s angle? What is its normal angle?

Answer 6

Bisection talar neck WRT bisection 1st metatarsal

Normal = aligned =0 +/- 5 degrees

This means the talar declination and the metatarsal declination should be the same, or within 5 degrees of each other

Question 7

How do you find the Hallux Abductus Angle? What is normal?

Answer 7

Bisection 1st metatarsal shaft WRT bisection shaft proximal phalanx 1st toe. Normal = 0-15 degrees

Question 8

How do you find the Hallux Abductus Interphalangeus Angle? What is normal?

Answer 8

Bisection shaft 1st proximal phalanx WRT bisection shaft distal phalanx 1st.
Normal = 0-10 degrees

Question 9

How do you find Kite’s angle? What is normal?

Answer 9

AKA talocalcaneal angle

distal lateral 1/3 calcaneus line WRT talar neck bisection.
Normal = 20 - 40 degrees