Real Time B-Mode Mechanical Scanning System

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Abstract
The possibility of visualizing dynamic activity within the human body with ultrasound has attracted the attention of many investigators. Various approaches have been employed to gather and display the acoustic data depicting the movement of body organs. Visualization of the heart with acoustic energy presents a formidable challenge. The motion of the heart and its valvular components requires resolving valve leaflets moving at velocities of up to 120 mm/second. The task for the transthoracic approach is complicated by the fact that the heart is surrounded by lung tissue which is, for all practical purposes, opaque to ultrasound, and bone, which reflects and refracts acoustic waves.

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