KneeKnee. The Views AP Lateral Internal Oblique External Oblique

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.