Turf Toe and Plantar Plate Injuries US in the sagittal plane best visualizes the plantar plate between the flexor tendon and hyaline cartilage of the metatarsal head [63]. US has shown a 96% sensitivity compared with 87% sensitivity for MRI for the detection of lesser toe plantar plate tears; however, both modalities have poor specificity [64]. Acute Tendinous Rupture Both MRI and US have been shown to be sensitive for the diagnosis of acute tendon rupture or dislocation in the foot [39]. US has also been reported to have a high sensitivity for peroneal tendon tears [65]. Variant 6: Adult or child older than 5 years of age. Acute trauma to the foot. Suspect penetrating trauma with a foreign body. Radiographs of the foot are negative. Next imaging study. CT Foot An experimental study for detection of a variety of foreign bodies (eg, fresh wood, dry wood, glass, porcelain, and plastic fragments) reported 63% sensitivity and 98% specificity for CT for detecting a foreign body [66]. CT was superior to MRI in identifying water-rich fresh wood. MRI Foot An experimental study reported 58% sensitivity and 100% specificity for MRI for detecting a foreign body [66]. In a clinical study including 8 patients with wooden foreign bodies, MRI showed the surrounding inflammatory response in all patients [28]. US Foot Both radiographs and US are useful imaging tools to exclude a foreign body in the setting of penetrating trauma to the foot [24]. US is the imaging modality of choice if the foreign body is not radiopaque (eg, wood or plastic), Acute Trauma to the Foot with a reported 90% sensitivity for visualizing wooden foreign bodies in some clinical and experimental studies [27,28]. US can be used effectively to locate wooden foreign bodies as small as 2.5 mm in length [27]. However, some experimental studies utilizing soft-tissue phantom models report lower overall sensitivity (<50%) for US for detection of foreign bodies [25].
Acute Trauma to the Foot. Turf Toe and Plantar Plate Injuries US in the sagittal plane best visualizes the plantar plate between the flexor tendon and hyaline cartilage of the metatarsal head [63]. US has shown a 96% sensitivity compared with 87% sensitivity for MRI for the detection of lesser toe plantar plate tears; however, both modalities have poor specificity [64]. Acute Tendinous Rupture Both MRI and US have been shown to be sensitive for the diagnosis of acute tendon rupture or dislocation in the foot [39]. US has also been reported to have a high sensitivity for peroneal tendon tears [65]. Variant 6: Adult or child older than 5 years of age. Acute trauma to the foot. Suspect penetrating trauma with a foreign body. Radiographs of the foot are negative. Next imaging study. CT Foot An experimental study for detection of a variety of foreign bodies (eg, fresh wood, dry wood, glass, porcelain, and plastic fragments) reported 63% sensitivity and 98% specificity for CT for detecting a foreign body [66]. CT was superior to MRI in identifying water-rich fresh wood. MRI Foot An experimental study reported 58% sensitivity and 100% specificity for MRI for detecting a foreign body [66]. In a clinical study including 8 patients with wooden foreign bodies, MRI showed the surrounding inflammatory response in all patients [28]. US Foot Both radiographs and US are useful imaging tools to exclude a foreign body in the setting of penetrating trauma to the foot [24]. US is the imaging modality of choice if the foreign body is not radiopaque (eg, wood or plastic), Acute Trauma to the Foot with a reported 90% sensitivity for visualizing wooden foreign bodies in some clinical and experimental studies [27,28]. US can be used effectively to locate wooden foreign bodies as small as 2.5 mm in length [27]. However, some experimental studies utilizing soft-tissue phantom models report lower overall sensitivity (<50%) for US for detection of foreign bodies [25].