Knee - Intercondylar

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Radiographic Positioning

Other related pages of interest

Name of projection Knee - Intercondylar (AP Axial)
Area Covered Intercondylar fossa, femoral condyles, tibial plateus and intercondylar eminence
Pathology shownBony or cartilaginous pathology, osteochondral defects and joint space narrowing
Radiographic AnatomyKnee Radiographic Anatomy
IR Size & Orientation 18 x 24cm
Film / Screen Combination Detail
(CR and DR as recommended by manufacturer)
Bucky / Grid No
Exposure 60 kVp
8 mAs
FFD / SID 100cm
Central Ray CR perpendicular to lower leg - angled 40° cephalad
1.2 cm distal to apex of patella
Collimation Collimate to knee joint on four sides
Markers Distal and Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
RespirationNot applicable
  • Patient supine on the X-ray table
  • Cushion for head
  • Flex knee 40° to 45°, place IR under knee
  • Raise IR by placing support underneath to put it firmly against posterior thigh and leg
  • Adjust IR as needed to centre IR to midknee joint
  • Ensure no rotation of the knee
  • CR perpendicular to lower leg - angled 40° cephalad, and 1.2 cm distal to apex of patella


Area Covered



Special Notes