A subsequent retrospective study compared accuracy for
cancer diagnosis of separate digital mammography manufacturers
with screen-film mammography.3 This study found
that there was no significant difference in accuracy of cancer
diagnosis for soft-copy digital and screen-film mammography
for the three digital manufacturers investigated. The
authors did not intend to compare one digital manufacturer’s
equipment to another but to compare digital with screen-film
mammography for each digital manufacturer. Since different
women were imaged on different digital systems it would
not have been possible to perform a paired comparison
between different manufacturers.