X-ray scattering in full-field digital mammography.
Effects of x-ray scattering on full-field digital mammography are analyzed with the scattering model of Seibert and Boone [Med. Phys. 15, 567-575 (1988)]. A new method is introduced for the estimation of model parameters from measurements. It is shown that with breasts thinner than a certain threshold, removing the anti-scatter grid leads to an improved contrast-to-noise ratio with a smaller patient dose. A fast approximate algorithm is presented for determining the scattered field in a gridless digital mammogram.
Nykänen
Kirsi
K
Instrumentarium Corp., Imaging Div., PO Box 20, Tuusula, 04301, Finland. kirsi.nykanen@fi.instrumentarium.com
Siltanen
Samuli
S
D016477:Artifacts; D001940:Breast / Q000503:physiopathology*; D003198:Computer Simulation; D006801:Humans; D008327:Mammography / Q000379:methods*; D008954:Models, Biological; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity