title: Invited commentary.
authors.affiliation: Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine Baltimore, Maryland.
authors.forename: Mahadevappa
authors.initials: M
authors.lastname: Mahesh
mesh_terms: D006801:Humans; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D011860:Radiography, Abdominal / Q000379:methods* / Q000639:trends*; D014057:Tomography, X-Ray Computed / Q000379:methods* / Q000639:trends*