Initial Radiographic Evaluation for Foot Pain

Standard Radiographic Views

The American College of Radiology recommends a standard three-view radiographic series of the foot, consisting of anteroposterior, oblique, and lateral projections, for initial imaging of acute foot trauma and chronic foot pain 1, 2, 3
This combination achieves 99% sensitivity for detecting foot fractures when Ottawa rules are positive, making it the gold standard first-line study 1, 2
The three-view foot radiograph series is the mainstay of initial imaging for acute foot trauma and chronic foot pain, with weight-bearing views when the patient can tolerate them 1, 2, 3

The American College of Radiology recommends obtaining weight-bearing radiographs when the patient can tolerate standing, as non-weight-bearing films may miss subtle malalignment and joint instability 1, 2, 3, 4, 5
Weight-bearing views are particularly crucial for suspected Lisfranc injuries, where they increase detection of abnormal alignment at the Lisfranc joint that would otherwise be missed 1, 2, 3
For plantar heel pain, weight-bearing radiographs combined with assessment of plantar fascia thickness and fat pad abnormalities achieve 85% sensitivity and 95% specificity for plantar fasciitis 6

For suspected calcaneal fracture, add an axial calcaneal view to the standard three views, as this increases specificity for diagnosing calcaneal fractures and sensitivity for distinguishing intra-articular involvement 1, 2, 3
For suspected Lisfranc injury, add an AP view with 20° craniocaudal angulation to the standard three views when clinical suspicion is high 1, 2, 3
Include bilateral foot AP radiographs to compare subtle malalignment with the uninjured side 1, 2, 3

Never order ankle radiographs when evaluating midfoot or tarso-navicular pain, as the tarso-navicular joint will not be properly visualized; foot radiographs are required 4, 5, 9
Do not rely solely on initial radiographs to exclude stress fractures, which have only 12-56% sensitivity on plain films 4, 5, 6, 9
Do not skip radiographs even with known hyperuricemia or obvious clinical diagnosis, as other pathology must be excluded first 9

Radiographs detect only 80-100% of calcaneonavicular coalitions and may miss talocalcaneal coalitions due to overlapping structures 6, 5
In polytrauma patients, approximately 25% of midfoot fractures identified on CT are overlooked on radiographs, making CT the primary imaging technique in high-energy trauma 7, 8
For persistent pain after negative radiographs with suspected stress fracture, MRI without contrast is the next appropriate study, as it detects occult fractures, bone marrow edema, and stress reactions invisible on radiographs 4, 9
Three-phase bone scan has 100% sensitivity and negative predictive value for ruling out stress fractures when radiographs are negative 4