Radiation dose to the eyes of patients during petrous bone tomography--a comparative survey.

Some investigation has been made in recent years of radiation dose to the eye during radiological procedures. A comparative survey has been made of eye dose during petrous bone tomography in different departments on different tomographic units and during different types of examination. Doses of up to 4 rad per exposure have been recorded and various methods of reducing the dose have been investigated, the most successful being the use of 1 mm lead eyeshields or examining the patient in the posteroanterior position.