Patella - PA

Radiographic Positioning

Adult

Other related pages of interest Applied Radiography Radiographic Anatomy Radiographic Protocols

Name of projection	Patella - PA
Area Covered	Knee joint , patella
Pathology shown	Patella fractures, dislocation, subluxation
Radiographic Anatomy	Knee Radiographic Anatomy
IR Size & Orientation	18 x 24cm Portrait
Film / Screen Combination	Detail (CR and DR if available)
Bucky / Grid	No
Filter	No
Exposure	60 kVp 8 mAs
FFD / SID	100cm
Central Ray	CR directed to mid-patella area Perpendicular to IR
Collimation	Four sides of collimation to include the area of patella Side to side to the skin lines Upper margin to include patella, lower margin to include knee joint
Markers	Distal and Lateral Marker orientation PA
Shielding	Gonadal (check your department's policy guidelines)
Respiration	Not applicable
Positioning	Patient prone on the X-ray table with legs extended Cushion for head Place support under ankle and leg Align and centre long axis of leg and knee to middle of IR True PA: align interepicondylar line parrallel to plane of IR (usually about 5° internal rotaton is needed) CR perpendicular to IR CR directed to mid-patella area
Critique PACEMAN	Positioning Area Covered Collimation Exposure
Special Notes