AN EFFICIENT REAL-TIME FOCUSING DELAY CALCULATION IN ULTRASONIC-IMAGING SYSTEMS

An efficient real time focusing delay calculation algorithm is propose d for variable sampling clock generation (SCG) with high accuracy need ed in digital focusing in ultrasonic imaging systems. The proposed alg orithm is an extension of the midpoint drawing algorithm that is well known in the computer graphics area. It can be implemented with simple hardware amenable to VLSI realization, without using a large amount o f look-up memory to store the sampling clock information otherwise req uired. (C) 1994 Academic Press, Inc.