Tomogram degradation due to eye shielding and collimation.
Phantom-image, line-pair resolution and anterior eye exposure have been measured to determine the optimum collimation and eye shielding for petrous temporal tomography. Small round collimation and 0.5-1.0-mm lead equivalent eye shields are recommended. This reduces eye exposure to 10% of the usual dose without changing line-pair resolution.
D005123:Eye; D006801:Humans; D010579:Petrous Bone / Q000000981:diagnostic imaging*; D011835:Radiation Protection; D013679:Technology, Radiologic; D014056:Tomography, X-Ray