PURPOSE: To assess possible changes in quality control (QC) practices
at mammography sites in the United States. MATERIALS AND METHODS: Mamm
ography site surveys were conducted in 1990, 1992, and 1995 through th
e Colorado Mammography Advocacy Project (CMAP). Data from mammography
sites applying for American College of Radiology (ACR) accreditation w
ere collected between August 1987 and August 1993 through the ACR Mamm
ography Accreditation Program. Data from both of these surveys were an
alyzed to assess temporal changes in mammography QC practices in the U
nited States between 1987 and 1995. RESULTS: CMAP results indicated st
atistically significant improvement in medical physicist QC practices
between 1990 and 1992 and in technologist QC practices between 1990 an
d 1995. Improvements in radiologic technologist QC practices coincided
with increases in radiologic technologist continuing education in mam
mography. ACR results indicated statistically significant improvement
in technologist QC practices between 1988 and 1992. CONCLUSION: There
have been substantial improvements in QC practices at mammography site
s in the United States during the past decade.