An efficient real time focusing delay calculation algorithm is proposed for variable sampling clock generation (SCG) with high accuracy needed in digital focusing in ultrasonic imaging systems. The proposed algorithm 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 of look-up memory to store the sampling clock information otherwise required.
ChangS. H.JeonK.BaeM. H.ParkS. B.Sampling Point-Wise Digital Dynamic Focusing in the Receive Mode of an Ultrasonic Linear Array Imaging System, in 1993 IEEE Ultrasonics Symposium, Baltimore, MD (to be published).
8.
ManesG. F.AtzeniC.SusiniC.Design of a simplified delay system for ultrasound phased array imaging, IEEE Trans. Sonics UltrasonicsSU-30, 350–354 (1983).
9.
PowersJ. E.PhillipsD. J.BrandestiniM. A.SigelmannR. A.Ultrasound phased array delay lines based on quadrature sampling techniques, IEEE Trans. Sonics UltrasonicsSU-27, 287–294 (1980).
10.
BresenhamJ.A linear algorithm for incremental display of digital arcs, Comm. ACM20, 100–106 (1977).
11.
Van AkenJ. R.An efficient ellipse-drawing algorithm, IEEE Computer Graphics and Application Magazine, 24–35 (1984).
12.
BaeM. H.Resolution Improvement by the Synthetic Focusing and a New Focusing Delay Computation Algorithm in the Ultrasonic Medical Imaging System, PH.D Dissertation, (Dept. of EE., Korea Advanced of Institute of Science and Technology, 1992).
13.
PetersonD. K.KinoG. S.Real-time digital image reconstruction: a description of imaging hardware and an analysis of quantization errors, IEEE Trans. Sonics UltrasonicsSU-31, 337–351 (1984).
