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Our Experience with Virtual Endoscopy of Paranasal Sinuses

The main goal of our work was to evaluate advantages and disadvantages of virtual endoscopy (VE) techniques in routinely diagnostic and preoperative management of patients with various sinus diseases or head traumas in our practice. Fly-through algorythm was performed using an Xeon based workstation on data sets created from axial CT images acquired from patients. Images were created using Siemens Somatom Emotion 16 continiously rotating helical CT scanner and archived in DICOM format. In comparison with real endoscopy, the VE has several advantages. It is completely non-invasive. It is possible to repeat the same procedure several times, therefore it may be a valuable tool for training. Interactive control of all virtual camera parameters, including the field-of-view is possible. Endoscopic viewing as opposed to the extend of lesions within and beyond the wall. Finally, it has a potential to stage tumors by determining the location and the extent of transmural extension.

virtual endoscopy; high resolution helical CT; paranasal sinuses

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