title: [Quality assurance of digital mammography X-ray system].
abstract: OBJECTIVE
  To improve the performance quality of mammography X-ray system, and to decrease misdiagnoses.
  
  
  METHODS
  Quality assurance was tested and controlled from such aspect as measurement of half value layer, beam quality assessment, breast entrance exposure average glandular dose, tube tunsion accuracy and reproducibility, and radiation output.
  
  
  RESULTS
  The image contrast, mistiness and noise were optimized.
  
  
  CONCLUSIONS
  With the quality assurance of the digital mammography X-ray system, the variations of the performance parameters remain in the range of permission, thus improving the quality of mammography.
authors.affiliation: Department of Biomedical Engineering, Guangdong General Hospital of Armed Police, Guangzhou 510507, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hu
authors.forename: Guangwen
authors.initials: G
authors.lastname: Lu
mesh_terms: D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008327:Mammography / Q000295:instrumentation* / Q000379:methods*; D011786:Quality Control; D011856:Radiographic Image Enhancement / Q000295:instrumentation*