Ap Knee
IR size: 10×12 inches
Shielding: Lead shield around waist
Patient Position: Instruct patient to lay supine. Ensure no rotation of the pelvis and fully extend legs
Part Position: Rotate leg internally 3 degrees or until the intererpicondylar line is parallel to the IR.
Central Ray: Center .5 inches below the apex of the patella. Depending on patient habitus you may need to angle the tube.
If ASIS to tabletop measures:
<19 cm angle 3-5 degrees caudad
19-24 cm no angle
>24 cm angle 3-5 degrees cephalic
SID: 40 inches
Collimation: Collimate to lateral skin margins
Respiration: patient does not hold respiration.
