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KneeKneeKneeKnee
The ViewsAP
LateralInternal ObliqueExternal Oblique
Things You Should Know
• Cassette Size 10 x 12 lengthwise• One view per cassette• Shield • Marker• Measures 11• Hold Still• 70@5
Part Position for AP• Done in the table bucky• Patient in Supine position on table• Align knee mid-line of table• Rotate foot internally 3 -5 degrees
for true AP
CR perpendicular Tibial platea 40 SID½” Distal to apex of patella
CR ANGLE DIFFERENCE• Measure the distance from ASIS to
table• 19-24 Average Patient
perpendicular• 25-up Above average Patient 5
degrees cephalad • Below 19 Below Average 5 degrees
caudad.
Our CR Angle• For our comp we will shoot
straight in• So our distance will be 40• DON’T FORGET TO LINE BUCKY
Seen on Radiograph• The distal femur• The proximal tib/fib• The femorotibial joint open• The intercondylar eminence in its
fossa.• The fibular head imposed by tibia
Lateral Knee• 10 x 12 cassette lengthwise• Shield • Marker• Measure 10
Part Position for Lateral• Roll patient up on affected side• Flex knee 20 degrees• Align knee to mid-line of table.• Align the epicondyles perpendicualr
to film so they are superimposed.• Patella plane perpendicular to Film.
CR 5-7 degrees cepalad1 inch below epicondyles SID 40 Distance 39
Seen on Radiograph• The distal femur and patella in
profile• The femoral epicondyles
superimposed.• Proximal tib/fib
Medial oblique• 10 x 12 cassette lengthwise• Shield • Marker• Hold still• Measures 10
Part position for medial• Patient supine• Align center knee with mid-line to
table• Internally rotate leg 45 degrees.
CR Perpendicular SID 40½ in distal to patella apex
Seen on Radiograph• The proximal tib/fib with no
imposition of head and neck of fibula.• Patella imposing the medial condyle
of femur• Lateral and medial joint spaces open.• Lateral condyle of femur and tibia are
seen
Lateral Oblique• 10 x 12 cassette lengthwise• Shield• Marker• Hold still
Part Position for lateral• Patient supine on table• Knee align to mid-line of table• Rotate knee 45 degrees
externally.
CR Perpendicular SID 40½ in distal to apex of patella
Seen on Radiograph• Proximal fibular imposed by the
tibia• Half of patella free of imposition
from lateral condyle.• Medial condyle and tibia in profile• Distal femur
The lower legTib/fib
the Views• AP
• Lateral
Things to know• Cassette size: 14 X 17 turned
diagonally • one cassette per view• Shield • Marker• Measures 10
Part position for AP• Patient Supine on table• Place shield over lap• leg fully extended• place leg in true AP position for knee and
ankle• Femoral condyles parallel to IR• foot flexed to 90 degree (TOES up)• include both joints (knee & ankle) IR.
Central Ray• 40 SID• perpendicular to mid-leg• Collimate to skin borders on lateral and
medial sides.• Leave collimation open from top to
bottom• ** can go up to 44 or 48 SID to include
more of part**
Seen on Radiograph• The entire tibia and fibula• both ankle and knee joint• the condyles of tibia and femur in profile• the intercondylar eminence centered in
the intercondylar fossa• some imposition of distal and proximal
tib/fib
Lateral Tib/Fib• 14 X 17 diagonally• shield• Marker
Part position for lateral• Patient on side with injured side down• flex knee about 45 degree to ensure
true lateral• plane of patella should be
perpendicular to IR• opposite leg behind injured one• both joints included on IR
•40 SID
Central Ray• perpendicular to mid-leg• collimation to skin borders on
sides• open fully top to bottom• ** can go up to 44 or 48**
Seen on Radiograph• Entire tib/fib• both joints• tibial tuberosity in profile• fibula head imposed by tibia• distal fibula imposed on posterior
portion of tibia• femoral condyles superimposed.
!!!Important Note!!!!• If you can not fit entire leg on on
film...• You must include the joint nearest
the injury on the film and take a separate picture of the other joint.