Standard Patella Views Flashcards
PA Patella: Patient Measurement
A-P, from the popliteal fossa to the patella
PA Patella: SID
40”
PA Patella: Tube Tilt
None
PA Patella: Image Receptor Size
8 x 10” or 10 x 12”
PA Patella: Patient Positioning
-Patient lies prone with affected patella placed flat against the image receptor, commonly requiring that the foot be internally rotated 5-10 degrees
On a PA Patella, if a fracture is suspected then what can be done to relieve pressure on patella
Sandbags under the adjacent thigh
PA Patella: Central Ray Position
Through the center of the popliteal fossa
PA Patella: Collimation
To the size of the body part
Lateral Patella: SID
40”
Lateral Patella: Tube Tilt
None
Lateral Patella: Image Receptor Size
8 x 10” or 10 x 12” in portrait orientation
Lateral Patella: Patient Positioning
-Patient lies on the affected side with the knee flexed 5-10 degrees
-Lateral aspect of the knee touching the receptor
-Femoral condyles are lined up and perpendicular
-CL leg may be crossed over the thigh of the affected side, out of the collimation field
Lateral Patella: Central Ray Position
Through the center of the patellofemoral joint space
Tangential Patella: Patient Measurement
A-P from the popliteal fossa to the patella
Tangential Patella: SID
38”
Tangential Patella: Tube Tilt
-10 degrees for full flexion of the knee
-IF full flexion cannot be achieved than 10-20 degrees may be used to compensate
Tangential Patella: Image Receptor Size
8 x 10” or 10 x 12”
Tangential Patella: Patient Positioning
Patient lies prone with the knee fully flexed as slowly as possible.
-Entire length of the femur should be flat against surface
-If knee cannot be fully flexed, then the tube is tilted until the x-ray beam is at a 45 degree angle to the patients lower leg
Tangential Patella: Central Ray Position
Through the center of the patellofemoral joint space
