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  • Biopsy guns designed for the automatic extraction of core tissue samples (typically in the form of a cylinder) from an anatomic structure of the body, by advancing an outer needle (i.e., a cutting cannula) into the tissue when the gun is released, while the inner needle (trocar) remains stationary. The biopsy gun holds the sample within the cannula when it is withdrawn from the patient and usually maintains a tight suction around the trocar. End-cut biopsy guns typically include a reusable, spring-loaded mechanism and disposable biopsy needles; they are used mainly to obtain samples of soft tissue from internal organs, including the kidneys, prostate, pancreas, and liver and the breast. The procedures are frequently performed under image guidance (e.g., radiographic, ultrasonic, magnetic resonance).
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