When the ASIS-to-tabletop measurement is greater than 24 cm,the central-ray angulation for an AP knee is:
A) 0 degrees.
B) 5 degrees cephalad.
C) 5 degrees caudad.
D) 7 degrees cephalad.

Question

Quizplus · Accepted Answer

When the ASIS-to-tabletop measurement is greater than 24 cm, a 5-degree cephalad angle is used to ensure the central ray is perpendicular to the tibial plateau for an AP knee projection.

When the ASIS-To-Tabletop Measurement Is Greater Than 24 Cm,the Central-Ray