red
rough prominence on the middle of the anterior surface of the Tibia just below condyles.
*best seen on a lateral projection
tibial tuberosity
smaller bone of the lower leg; located posterior and lateral
fibula
longest and strongest bone in the body
femur
raised area on the posterolateral aspect of the medial condyle
distinguishes between medial and lateral condyles – best seen on a rotated lateral projection of the knee - helps determine rotation errors
adductor tubercle
superior border of the patella is known as the _____________
base
strong bands at sides of knee
collateral ligaments
We want the CR to be ________ to the Tibial Plateau so that an open joint space is demonstrated.
parallel
Knee
(thin thighs and buttocks)
CR angle?
3-5 caudad
knee
(thick thighs and buttocks)
CR angle?
3-5 cephalic
how many degrees do we flex the knee in the lateral position?
20-30 degrees
CR angle for LAT knee?
5-7 cephalic
Routine projections for Tib/Fib
AP AND LAT
SID for Tib/Fib?
44 inches
How is the patient positioned for an AP knee?
Patient supine
with 3-5° internal rotation
centering point for an AP knee?
½” inferior to apex of patella
-Head and neck of fibula without superimposition
-½ of patella free from superimposition medially;
- lateral condyle in profile
What projection of the knee?
medial oblique
What is the name of the bony projection between the tibial plateaus?
Intercondyloid eminence (tubercles)
How many degrees do we flex the knee for a lateral patella ?
Leg lateral with knee flexed 5-10°
Routine series for Patella?
PA, LAT, SUNRISE
What is the area called that separates the medial and lateral femoral condyles posteriorly?
Intercondyloid fossa
Routine projections for a knee
AP
INT OBL
LAT OBL
LAT
thin thigh & buttocks <19 cm
CR angle for AP and OBL knee?
3-5° caudal
-Posterior and inferior borders of femoral condyles superimposed
-Patella in profile with femoropatellar joint space open
lateral knee
Thick thigh & buttocks > 24 cm
CR angle for AP and OBL knee?
3-5° cepahlic
A lateral knee image that is overrotated toward the image receptor can be recognized by
the fibular head will appear less superimposed by the tibia than a true lateral