Quality assurance for grey-scale imaging.
Madsen
E L
EL
Medical Physics Department, University of Wisconsin, Madison, WI 53706-1532, USA.
D001330:Electronic Data Processing; D006801:Humans; D019047:Phantoms, Imaging; D011785:Quality Assurance, Health Care; D012449:Safety; D014463:Ultrasonography / Q000592:standards*