High resolution computerized tomography in otorhinolaryngology.

Since the initial application of CT to otorhinolaryngology in the 1970's, marked improvements in computed tomographic technology have occurred, especially in the past 2-3 years. Further improvements in density and spatial resolution have resulted in high resolution images of either soft tissue or bony structures. Faster scanning times (5-10 seconds for high resolution images) have allowed studies of areas where motion artifact previously existed. Thinner slices (1.5 mm) and extended bone windows have allowed markedly improved bone detail, especially of the temporal bone. Digital computed radiographs can offer a preliminary overview, allowing improved active radiologic monitoring. Reformatted images in axes not able to be directly scanned have also improved. These improvements have resulted in newer widespread applications of CT to study otorhinolaryngologic disease, with CT often the definitive study.