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  • Ultrasonic scanning systems designed to provide high-resolution images of anatomy that is a short distance below the skin (e.g., 1.5 to 6 cm), facilitating access to the vasculature and/or other superficial organs. These scanning systems typically consist of a portable, handheld unit that operates at frequencies from 5 to 12 MHz using dedicated probes. Vascular access ultrasonic scanners are used mainly to guide placement of needles and/or catheters in the vasculature either percutaneously or intraoperatively; the scanners may be also used to locate organs and other anatomic structures that are relatively close to the body surface.
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