Early Screening Initiatives
Radiology was incorporated into public health screening programs such as chest radiography for tuberculosis and later mammography screening for breast cancer and these initiatives aimed to detect disease earlier at a population level and to reduce morbidity and mortality through timely intervention
Program Design and Evidence
Screening programs required careful design including target population selection quality assurance protocols and evaluation of benefits and harms and over time evidence based guidelines and randomized trials informed which imaging based screening programs provided net population benefit
Ethical and Access Considerations
Population screening raised questions about access equity overdiagnosis and resource allocation and modern screening programs balance sensitivity with specificity and include outreach and navigation to ensure that benefits reach underserved communities