[The application and evaluation of helical CT reprocessing technique in the diagnosis of nasal cavity and paranasal sinus diseases].

OBJECTIVE: To evaluate the display ability and the clinical application of the helical CT reprocessing technique to nasal cavity and paranasal sinus diseases.
METHOD: Ten pioneers and 20 patients with suspected nasal diseases totaling 56 sides of nasal cavities were practised helical CT scanning and then the multiplanar reconstruction and CT Virtual endoscope through the soft ware, compared the results with nasal endoscopy and operative findings. Wilconxon W test and chi2 test were closed for statistic analysis. RESULT: The helical CT could reveal not only the anatomical structure, the location and the extent of the lesions in nasal cavity, paranasal sinuses and nasopharynx, but also the current condition of anterior and middle cranial fossa and the airway from the different angles, sections and multiposition. It could pass easily through the spaces such as nasal sinuses, narrow nasal passges and the distal site of blocked area compared with nasal endoscopic examination.
CONCLUSION: The helical CT technique provides a noninvasive, anewed, economic and safe imagelogic procedure. It can retrieve the defecations of the routine CT and nasal endoscopy. It is believed that the reasonable use of the CTVE and MPR combine with axial CT can increase the diagnostic information and improve the validity of diagnosis.