Conventional imaging of the equine fetlock using radiography and ultrasonography can be frustrating in identifying the cause of lameness and in preventing further damage including catastrophic fractures in racehorses. Nuclear scintigraphy had contributed significantly in the diagnosis of fetlock lameness in racing Thoroughbred and Standardbred horses 1, 2 but, in common with many imaging modalities and depending on the system used, nuclear scintigraphy has limitations in terms of sensitivity, specificity and spatial resolution.