CT Findings of Orbital Blowout Fracture

【Objective】To analyse CT findings of orbital blowout fracture in order to make early diagnosis.【Methods】Clinical manifestations,CT findings and common locations of 47 cases of orbital blowout fracture were retrospectively analysed.【Results】Interruption of bone continuity,fragments,displacement of bone wall were the direct CT signs of fracture.They were classified into three groups:(1)blowout fracture of single orbital wall(2)blowout fracture of two orbital walls (3)orbital blowout complicated with other direct facial fractures.Most blowout fracture involved the medial wall and the orbital floor(93.6%).Teardrop appearance at the roof of maxillary sinus was a specific indirect sign of inferior orbital wall frature.【Conclusion】CT diagnosis of orbital blowout fracture is of significant clinical importance.