Author Question: A cephalic central ray angulation is required on an AP knee projection when the 1. examination is ... (Read 24 times)

xclash · **on:** Jul 17, 2018

A cephalic central ray angulation is required on an AP knee projection when the

1. examination is performed with the patient in an upright position.
2. patient's anterior tibial margin is demonstrated distal to the posterior tibial margin
on the resulting image.
3. the patient's ASIS to imaging table measurement is 22 cm.
4. the knee is flexed and a curved IR is used.
a. 2 and 3 only
b. 4 only
c. 2 and 4 only
d. 1, 2, and 4 only

Question 2

A 15- to 20-degree internally rotated AP oblique ankle projection with poor positioning demon-strates an open distal lateral mortise superimposing the calcaneus. How was the patient misposi-tioned for such an image to be obtained?

a. The foot was plantar-flexed.
b. The leg was not adequately internally rotated.
c. The central ray was centered too caudally.
d. The proximal lower leg was elevated.