title: Improved mammography with a reduced radiation dose.
abstract: A 2-cm-high focused air-interspaced grid with a 7:1 ratio and eight lamellae per inch was devised. The grid is arc-shaped and pivots on its focal point, the anode-cathode axis. Milliamperage was 35% less for breast phantom radiographs obtained with the new grid versus those obtained with a conventional 5:1 mammographic grid. In a comparison study of five mammograms, each evaluated for five parameters, the images obtained with the new grid were judged to be of equal or better quality than those obtained with a conventional grid in 17 of 20 comparisons.
authors.affiliation: Department of Radiology, University of Minnesota Hospital and Clinic, Minneapolis 55455.
authors.forename: J D
authors.initials: JD
authors.lastname: Robinson
authors.forename: D
authors.initials: D
authors.lastname: Ferlic
authors.forename: F
authors.initials: F
authors.lastname: Kotula
authors.forename: L
authors.initials: L
authors.lastname: Ferlic
authors.forename: R A
authors.initials: RA
authors.lastname: Geise
authors.forename: K
authors.initials: K
authors.lastname: Amplatz
mesh_terms: D005260:Female; D006801:Humans; D008327:Mammography / Q000295:instrumentation* / Q000379:methods; D011829:Radiation Dosage