Benefit: Early detection -> improved morbidity and mortality

Risks: 18 weeks equivalent background radiation dose. For 40-49yo, small change to morbidity and mortality but large false positive tests and biopsies.

screening mammogram.

Same as diagnostic but no immediate radiologist review. Not for symptomatic women. reviewed after and compared to previous films. no clinical exam or context provided. If detected → brought back for triple assessment.

50-74yo