Ultrasonography uses sound waves of higher frequencies (above the normal hearing capacity of a healthy human, i.e., 20 kHz) to visualize inner organs. When the sound waves pass through the human body, they are reflected back at different speeds by the different types of tissues, e.g., bones, muscles, etc. These rebounding waves are captured and converted to images. While doing procedures such as a needle biopsy, the physician needs imaging guidance to know the exact location of the region to be biopsied and the accurate placement of the needle in that region. With the help of ultrasonography, the physician can move the needle inside the body to reach the tissue to be biopsied without causing damage to the surrounding tissues.
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Code Range for Needle Localization:
77001-77003 - Fluoroscopic Guidance
76930-76965 - Ultrasonic Guidance Procedures
77011-77014 - Computed Tomography Guidance
77021-77022 - Magnetic Resonance Guidance