The feasibility of the PA projection for tomography of the petrous bone. Significant reduction in radiation dose to the lens of the eye.
D002386:Cataract / Q000209:etiology / Q000517:prevention & control; D002648:Child; D006801:Humans; D007223:Infant; D007908:Lens, Crystalline / Q000528:radiation effects; D010579:Petrous Bone / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D014056:Tomography, X-Ray / Q000009:adverse effects / Q000379:methods