title: X-ray imaging: projection radiography.
authors.affiliation: Quantum Metrology Division, National Institutes of Standards and Technology, Gaithersburg, MD, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Tang
authors.forename: H L
authors.initials: HL
authors.lastname: Kundel
authors.forename: C E
authors.initials: CE
authors.lastname: Ravin
authors.forename: H K
authors.initials: HK
authors.lastname: Huang
authors.forename: R D
authors.initials: RD
authors.lastname: Deslattes
authors.forename: D P
authors.initials: DP
authors.lastname: Boyd
authors.forename: D
authors.initials: D
authors.lastname: Gur
mesh_terms: D006801:Humans; D011856:Radiographic Image Enhancement / Q000295:instrumentation / Q000379:methods / Q000592:standards; D012106:Research