Radiation Dose to Critical Organs During Petrous Tomography

It was found that during “routine” petrous bone tomography a dose of 10 R was delivered to the cornea. Simple lead shields placed over the cornea reduced this dose to about 1.0 R. The shielding did not interfere with film quality and was easily accomplished. Tables give the doses to 20 organs and/or areas in Rando phantoms with and without the lead shield and in 10 critical organs in 6 patients with the shields in...