RadPos

6/22/1999

intercondylar view of knee

• Relationship b/w femur at the central ray (45° )
• Lower leg so proximal tibia is not in the way
• Make them at a perpendicular plane (90° )
• Central ray is a couple inches proximal to crease of the knee
• Double the mAs from AP shot—better choice
• Measure the central ray for this shot
• Lay pt on table w/tube tilt at 45° and raise the foot so tibia is perpendicular (support the lower leg)
• Grid or not is depending upon the size (12cm)

• 4 views of knee
• ap
• lateral
• intercondylar
• sunset view of patella

Sunset View of Patella

• difficult to do w/patella (knee) injury
• relationship of tibia and central ray
• angle of 30-35°
• patellar/femoral joint
• 4´ 4 beam
• only want to see the joint
• patella is more drawn out laterally
• longer right femoral condyle

Lower Leg

• AP and lateral
• AP
• Toes straight up at the ceiling
• If too long, have to decide which is more important knee or ankle

• Lateral
• Pay attention to pelvis, make sure it is perpendicular
• Don't care if there is a slight bend

• Use same technique calculation as AP

Ankle

• 3 views
• Mortice joint
• Distal tib/fib to talus
• 10´ 12 film and divide w/lead vinyl (long dimension)
• central ray is b/w malleoli
• foot is perpendicular to film plane (toes straight up)
• collimate wide enough to include malleoli

• oblique--30°
• improves visualiztion of the mortice joint
• distal tib/fib syndesmosis
• wide pathological diastasis

• lateral
• do not include toes
• central ray at medial malleolus
• foot parallel to film plane
• marker behind the heel
• make sure you can see light behind and below the callcanious

Foot

Dorso/Plantar foot

• tube tilt
• perpendicular to dorsum of the foot
• plantar surface is in full contact w/film
• podiatrist likes weight bearing
• 10´ 12 film
• 2 or 3 nolan filter distal 1/3 or 1/2

• big toe and heel on the film
• little toe off the film
• foam support
• inversion to 30°
• filter