| Feature | Breast Ultrasound | Mammogram |
| Technology | Sound waves (No radiation) | Low-dose X-rays |
| Best Used For | Evaluating lumps, cysts, and dense breasts | Broad screening & detecting microcalcifications |
| Pregnancy Safety | 100% safe during pregnancy & lactation | Generally avoided during early pregnancy |
| Comfort Level | Painless (Gliding gel and light pressure) | Requires brief breast compression |