The Value Of Three-dimensional Multislice Computed Tomographic Reconstruction In Diagnosing Fracture Of Nasal Bone

Fracture of nasal bone is a common disease. The traditional method in diagnosing fracture of nasal bone is plain film. It has inter-overlapping screenage and poor density resolution, which is easy to miss diagnose. It can meet the request of neither clinical diagnosis nor the Forensic identification of nasal-bone fracture. CT(Computer tomography) is superior to plain film. Just plain or corona scan of common CT can't display the certain locus, form and the relationship with peripheral tissue of nasal-bone fractures very well. We study the clinical value of three-dimensional MSCT (multislice CT)reconstruc-tion in diagnosing fracture of nasal bones.Methods MSCT reconstruction were performed in 25 patients of nasal trauma, compared with 18 normal persons. Nasal-bone CR (Computed Radiography) was also performed in 7 of 25 patients. To determine the accuracy of MSCT reconstruction in diagnosing minor fractures, we performed a minor fracture in a dead body (from the ENT institute). We regard the result of dissection as golden standard. Then nasal-bone CR, common CT, MSCT reconstruction were performed. We compared their results in order to explore their value in diagnosing nasal-bone fractures.Results We can clearly observe the characteristics of the normal structure and fractures of the nasal bones. There are 25 consecutive patients with trauma history. There are simple fractures of nasal bones in 14 patients, fractures of nasorbital regions in 3 patients, simple fractures of orbital in 2 patients, simple soft tissue injury without fractures in 6 patients. There is coincidence betweenthe image of 3DCT and the result of dissection.MSCT is more advanced system of helical scanners. MSCT has several detectors (in this study we use 4 detectors). It collects continuous volume data, rather than sequential mechanisms, which are then resolved by the system's computer into a series of 2D images and/or rendered in 3D at various angles. Compared with plain film and common CT, three-dimensional CT reconstruction has transparent superiority.Conclusion MSCT reconstruction, with which we can enhance the diagnosis and surgical planning of complex nasal fractures, is the most ideal methods of diagnosis.