CT virtual sialendoscopy versus conventional sialendoscopy in the visualization of salivary ductal lumen: an in vitro study.

Objectives/hypothesis: To evaluate the feasibility of computed tomographic (CT) virtual sialendoscopy and its performance characteristics for the visualization of salivary ductal lumen as compared with conventional sialendoscopy.

Study Design: An in vitro study.

Methods: Conventional sialendoscopy was performed in 16 submandibular glands in vitro and the surgical findings were recorded. Then a contrast agent was injected into the Wharton's duct via orifice. After CT scanning, the CT data were transferred to an independent workstation and were postprocessed with commercially available software to generate three-dimensional reconstructive and virtual sialendoscopic images. Finally, the plastination of submandibular glands was performed with 20% perchloroethylene ethyl acetate plastics filler to make cast specimens. CT three-dimensional reconstruction of the ductal system was compared with the cast specimen, and the performance of conventional sialendoscopy and CT virtual sialendoscopy for the visualization of salivary ductal lumen was also compared.

Results: The CT data acquisition and postprocessing protocol were feasible. CT three-dimensional reconstruction enabled clear visualization of the ductal system from any directions and angles, which showed close resemblance to the cast specimens. And CT virtual sialendoscopy created clear endoluminal views of salivary ducts simulating those obtained with conventional sialendoscopy.

Conclusions: Our initial experience shows that CT virtual sialendoscopy has the potential to be an attractive imaging technique for the visualization of salivary ductal lumen.