Clinical indication:

Fracture, dislocation of patella

Region:

Patella, Knee joint

Patient’s Position:

The patient may lie in the semi recumbent position, holding cassette superior the patella and in the landscape orientation.

Patient’s feet are closed to tube side of the table.

The knee should bent close to 30°

Assist the patient to maintain this position by placing a pillow behind the patient.

Cassette:

Size: 14’’x17’’ Orientation: landscape

FFD/SID:

100cm

Central ray:

The central ray will be angled 30°from horizontal, shooting inferior-superior towards the patella. This will require the tube to lie below the level of the examination table; hence the patient should be as possible

The apex of the patella

Grid:

No

Respiration:

Not related.

Exposure factors:

60-70kVp 7-10mAs

Collimation:

Collimate laterally to the knee skin margins, superiorly to the medial skin margin, inferiorly to the femoropatellar joint space.