Abstract
Ultrasound (US) is a relatively inexpensive, non-invasive and readily available technique which is well tolerated by patients. It is particularly useful in examining superficial structures (less than 5cm deep to the skin surface), where the use of a high frequency linear probe (7.5–12MHz) produces high definition images in multiple imaging planes. The spatial resolution achieved by US is better than either MRI or CT, and when combined with tissue biopsying techniques such as fine needle aspiration (FNA) for cytology or core biopsy for histopathology US is a highly specific diagnostic tool.
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