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PURPOSE To measure the breast dose and dose distribution from examinations performed with electron-beam computed tomography (CT). MATERIALS AND METHODS Radiographic film was placed bilaterally at three depths in the breasts of an anthropomorphic phantom and exposed with clinically relevant protocols. The average breast dose and the dose distribution were(More)
PURPOSE To determine the prevalence and progression of myopic retinopathy in Chinese adults. DESIGN Population-based cross-sectional study. PARTICIPANTS The Beijing Eye Study 2001 included 4439 subjects of 5324 individuals who were invited to participate (response rate, 83.4%); the eligibility criterion was an age of 40+ years. The study was repeated in(More)
PURPOSE To detect the abnormalities of gray matter in children with amblyopia by voxel-based morphometry (VBM). DESIGN Prospective, nonrandomized clinical trial. METHODS Thirteen children with amblyopia and 14 normally sighted children underwent magnetic resonance (MR) examination. The two groups were age-matched with a mean age of 5.8 years. In the(More)
PURPOSE To detect the abnormalities of the optic radiation (OR) in children with amblyopia by diffusion tensor imaging (DTI) and tractography. DESIGN Prospective, nonrandomized clinical trial. METHODS Fourteen children with amblyopia and 14 normally sighted children underwent DTI scanning. After the ORs were reconstructed by using tractography(More)
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