Radiographic mottle and patient exposure in mammography

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Radiology; (United States)

DOI:https://doi.org/10.1148/radiology.145.3.7146416· OSTI ID:6327056

Barnes, G T; Chakraborty, D P

Radiographic mottle has been analyzed in mammography using a comprehensive theory that takes into account fluctuations in absorbed x-ray energy and in phosphor light-photon yield, as well as film granularity and random variations in phosphor coating. Density fluctuations, signal-to-noise ratios, and quantum-efficiencies are presented for two screen/film systems as functions of density and viewing-aperture size. For sampling apertures of less than 500 micrometers in diameter, film granularity is the dominant source of noise for a Kodak Min-R screen/film system. This implies that quantum mottle can be increased and patient exposure reduced with little or no loss in imaged information. Such is the case for the second combination, a Min-R screen combined with Ortho-M film.

• Research Organization: Department of Diagnostic Radiology, University of Alabama School of Medicine, Birmingham
• OSTI ID: 6327056
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 145:3; ISSN RADLA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
BODY
DOSES
ELECTROMAGNETIC RADIATION
GLANDS
IMAGE PROCESSING
IONIZING RADIATIONS
MAMMARY GLANDS
MEDICINE
NUCLEAR MEDICINE
ORGANS
PATIENTS
PHOTOGRAPHIC FILMS
PROCESSING
RADIATION DOSES
RADIATIONS
RADIOLOGY
X RADIATION