Breast cancer screening modilities commonly applied are as follows:

Clinical Breast Examination(CBE)

   a standard part of the annual preventive well-woman examination

Breast UltraSonography (BUS)
   Used increasingly as a complementary method for the assessment of mammographically or clinically detected breast masses for supplemental information on dense tissue.
   Operator dependent and time consuming

Mammography(MAM)
   Front line screening modality and established clinical standard of care is questioned
   Unable to examine breast tissue near the chest wall and axilla
   Unsuitable for eastern asia people with dense/small breast

The overview of screening/diagnositc modalities in terms of performance and cost is as follows: