Analysis of Current Practice of CT examinations.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011364:Professional Practice / Q000639:trends*; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000453:epidemiology / Q000209:etiology; D012307:Risk Factors; D014057:Tomography, X-Ray Computed / Q000706:statistics & numerical data*; D055815:Young Adult