Ultrasonography (US) is widely used to detect and diagnose breast lesions because it has no radiation, it has no injection of contrast or radioactive material, and it is accessible and inexpensive when compared to other methods. Except for some occasions (pregnancy, lactation, or young women), US is usually performed in combination with mammography. In recent years, breast ultrasound has gained more space due to technologic advances, with better equipments and high contrast and resolution images, and limitation of mammography in women with dense breasts.
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