Acoustical Imaging pp 1-14 | Cite as
Digital Scan Conversion and Smoothing for a Real Time Linear Array Imaging System
Abstract
One form of real time ultrasonic imaging system uses a linear array of transducer elements operated in their near field [1]. Sequential transmission and reception from the elements provides a limited number of distinct ultrasonic reflection patterns from which a B-scan cross-sectional image is assembled. Prior systems utilized an XY oscilloscope as the display device, where the X deflection position is a repetitive sawtooth function plotting echoes linearly as a function of time after transmission, and the Y deflection corresponds to the element location and therefore the ultrasonic beam. Intensity modulation with the received echo signal amplitude then produces a B-scan image. Since the ultrasound beams are generally parallel and equally spaced, proper adjustment of the deflection factors preserves the geometric image properties and permits dimensional measurements.
Keywords
Vertical Cross Section Interpolation Performance Ultrasonic Data Raster Line Line MemoryPreview
Unable to display preview. Download preview PDF.
References
- [1]N. Bom, C.T. Lancee, J. Honkoop, and P.G. Hugenholtz, “Ultrasonic Viewer for Cross-Sectional Analysis of Moving Cardiac Structures,” Biomedical Engineering, Nov. 1971, p. 500.Google Scholar
- [2]J.T. Walker, A.L. Susal, and J.D. Meindl, “High Resolution Dynamic Ultrasonic Imaging,” Proc. of the SPIE, 152, Aug. 1978 (in press).Google Scholar
- [3]J.A. Vogel, C. Ligtvoet, N. Bom, G. van Zwieten, and P.G. Hugenholtz, “Processing Equipment for Two-Dimensional Echocardiography Data,” Ultrasound in Medicine and Biology, 2 (3), 1976, pp. 171–179.CrossRefGoogle Scholar
- [4]R.W. Schafer and L.R. Rabiner, “A Digital Signal Processing Approach to Interpolation,” Proc. of IEEE, 61 (6), June 1973, pp. 692–702.Google Scholar