title: True Pathologic Abnormality versus Artifact Foot Position and Magic Angle Artifact in the Peroneal Tendons with 3T Imaging.
abstract: Magnetic resonance imaging is a commonly ordered examination by many foot and ankle surgeons for ankle pain and suspected peroneal tendon pathologic abnormalities. Magic angle artifact is one of the complexities associated with this imaging modality. Magic angle refers to the increased signal on magnetic resonance images associated with the highly organized collagen fibers in tendons and ligaments when they are orientated at a 55° angle to the main magnetic field. We present several examples from a clinical practice setting using 3T imaging illustrating a substantial reduction in magic angle artifact of the peroneal tendon in the prone plantarflexed position compared with the standard neutral (right angle) position.
authors.forename: Deena B
authors.initials: DB
authors.lastname: Horn
authors.forename: Steven
authors.initials: S
authors.lastname: Meyers
authors.forename: William
authors.initials: W
authors.lastname: Astor
mesh_terms: D000328:Adult; D000843:Ankle Joint / Q000000981:diagnostic imaging*; D018771:Arthralgia / Q000175:diagnosis* / Q000209:etiology; D016477:Artifacts; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D013710:Tendons / Q000002:abnormalities* / Q000000981:diagnostic imaging