II. Imaging: Knee XRay Indications
- See Knee XRay
- Knee XRay is first-line when indicated in Knee Injury or Knee Pain (but poor overall efficacy)
- Acute Knee Injury
- See Knee XRay Indications in Acute Injury (e.g. Ottawa Knee Rules)
- Acute Fracture (e.g. Patella Fracture, Tibial Plateau Fracture)
- Chronic Knee Pain
- Osteoarthritis (with weight bearing AP and 20 degrees flexion)
- Osgood Schlatter disease
- Osteochondral Fracture, Osteochondritis Dissecans or avascular necrosis suspected
- Obtain AP, lateral, and notch/tunnel view, merchant views
III. Imaging: Knee Ultrasound Indications
- See Knee Ultrasound
- Dynamic tendon evaluation (e.g. Patellar tendon, quadriceps tendon)
- Collateral ligament evaluation
- Baker Cyst
- Neurovascular evaluation
- Knee Effusion evaluation (esp. to direct needle aspiration)
IV. Imaging: Knee CT Indications
- Complex or occult Fracture suspected and non-diagnostic XRay (e.g. Tibial Plateau Fracture, multi-part Patella Fracture)
- Posterior Knee Dislocation suspected (CT Angiogram of leg)
V. Imaging: Knee MRI Indications
- Occult Fracture not visualized on XRay (CT may also be used)
- Suspected significant ligament injury(ACL, PCL, LCL, MCL) or meniscal tear requiring surgery
- Suspected Tendon Injury (quadriceps or Patellar tendon)
- Mechanical symptoms (e.g. locking) refractory to trial of physical therapy
- Osteochondral Fracture, Osteochondritis Dissecans or avascular necrosis suspected (non-diagnostic XRay)
- Malignancy
- Osteomyelitis