Dr. JS Lee; Department of Medicine, Tuen Mun Hospital

Ultrasound in medicine was first documented in the early 1940s and with commercially available systems since the mid 1960s. It has evolved from still pictures to real-time moving grey-scale images of today. With the exponential increase in microchip processing power the present available systems are faster and more powerful, enabling more enhancement of the signal and new ways of interpreting and displaying images. Modern devices are inexpensive, lightweight, and user-friendly and can be used not just for the out-patient setting but also at the bedside.1

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