Communications – electrical: acoustic wave systems and devices – Acoustic image conversion
Patent
1988-07-18
1993-02-16
Pihulic, Daniel T.
Communications, electrical: acoustic wave systems and devices
Acoustic image conversion
367 11, 36441325, 12866001, G01N 2900, G03B 4200
Patent
active
051876876
ABSTRACT:
For reducing speckle in echo signals derived from reflections of pulsed coherent waves, the echo signals are subjected to amplitude and phase/frequency demodulation and the resultant amplitude and phase/frequency data are multiplied to generate an image signal. Selective control of the multiplication process may be provided in accordance with signal amplitude and/or signal-to-noise ratio.
REFERENCES:
patent: 4407293 (1983-10-01), Suarez, Jr. et al.
patent: 4543826 (1986-10-01), Ferrari
patent: 4604697 (1986-10-01), Luthra et al.
patent: 4690150 (1987-09-01), Mayo, Jr.
patent: 4691707 (1987-09-01), Sankar
P. Mohana Shankar et al., IEEE Transactions on Sonics and Ultrasonics, vol. SU-32, No. 4, Jul. 1985, pp. 537-543.
Brown et al., "An Introduction to Synthetic Aperture Radar", IEEE Spectrum vol. 6, (1969) pp. 52-62.
Buckhardt "Speckle in Ultrasound B-Mode Scans", IEEE Trans. on Sonics and Ultrasonics vol. SU-25 (1978) pp. 1-6.
Entrekin et al., "Real time speckle reduction in B-mode images" IEEE 1979 Ultrasonics Symposium Proceedings, (Sep. 26-28, 1979) pp. 169-174.
Magnin et al., "Frequency Compounding for Speckle Contrast Reductions in Phased Array Images", Ultrasonic Imaging, vol. 4 (1982) pp. 267-281.
Magnin, "Coherent speckle in ultrasound images" Hewlett-Packard Journal, vol. 34, No. 10, (1983) pp. 39-40 particularly p. 40, lines 15-44.
Melton, "Parallel-focusing and speckle reduction in medical ultrasonic imaging" IEEE 1980 Ultrasonics Symposium Proceedings, vol. 1/2, 5-7, (1980) pp. 1073-1076.
Shattuck, et al., Ultrasonic Imaging 4, (1982) p. 93-107.
Wells, et al., "Speckle in ultrasonic imaging" Ultrasonics, vol. 19, No. 5, (1981) pp. 225-229.
Burckhardt Christoph B.
Dousse Bruno M. J.
Kontron Instruments Holding N.V.
Pihulic Daniel T.
LandOfFree
Production of images does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of images will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2153030