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4817614 Method and apparatus for adaptive focusing in a medical ultrasound imaging apparatus
Ultrasound in Med. & Biol. Vol. 16, No. 2, pp. 215-216, 1990 0301-5629190 $3.00 + .00 Printed in the U.S.A. (c) 1990 Pergamon Press plc. All rights reserved.
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH ® online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH ® can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
4817015
tion of a first circuit including a first switch element connected in series with a power supply having one terminal thereof connected to a common potential point, a second circuit including a second switch element connected in series with a receiver having one end thereof connected to the common potential point, and a third circuit including the transducer having one end thereof connected to the common potential point.
HIGH SPEED TEXTURE DISCRIMINATOR FOR ULTRASONIC IMAGING Michael Insana, Stephen Smith, David G Brown, Robert Wagner assigned to The United States Government as represented by the Secretary of the Health and Human Services Tissue signatures are obtained from first and second order statistics of an image texture to discriminate between different normal tissues and to detect abnormal conditions. These signatures describe intrinsic backscatter properties of the tissue imaged, and are used as the basis of an automatic tissue characterization algorithm. A device for on-line classifying of the texture of an image measures a total of four first and second order statistical properties of echo signals of a region of interest (ROI) selected by an operator, the echo signals being contained in an image memory. These can be used to obtain the tissue signatures, to detect low contrast lesions by machine, and to produce parametric images.
4817614 METHOD AND APPARATUS FOR ADAPTIVE FOCUSING IN A MEDICAL ULTRASOUND IMAGING APPARATUS Dietrich Hassler, Heinz Eschenbacher, Wolfgang Haerer, Uttenreuth, Federal Republic Of Germany assigned to Siemens Aktiengesellschaft A sectional plane of the examination subject is first scanned by focused ultrasound transmission beams in an adaptation phase. Disturbing effects from the reflected echo signals which are caused by the inhomogenities in the tissue are thereby measured. In this adaptation phase, correction values for the delay time of the signals of the elemental transducers of the ultrasound array in comparison to the standard focusing are also derived from the measured values. In a following B-image imaging phase, the delay times of the active aperture are then varied dependent on the correction values during the emission and/or during reception. The disturbing effects are thereby compensated. A method and apparatus are disclosed which are especially well-suited for linear array systems and for patients having inhomogeneous tissues.
4817066 TRANSMITTER/RECEIVER FOR ULTRASONIC DIAGNOSTIC SYSTEM Wasa Takasugi, Ryuichi Shinomura, Takeaki Okabe, Higashiyamato, Japan assigned to Hitachi Ltd; Hitachi Medical Co A transmitter/receiver for suppling a pulse power to a transducer and receiving a signal from the transducer comprises a parallel connec213
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH ® online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH ® can be obtained from Pergamon Orbit InfoLine Inc., 8000 Westpark Drive, McLean, Virginia 22102 U.S.A. Copies of complete patents announced in this Section are available from Pergamon Orbit InfoLine Inc. for $8 per copy. Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon Orbit InfoLine only.
4817015
tion of a first circuit including a first switch element connected in series with a power supply having one terminal thereof connected to a common potential point, a second circuit including a second switch element connected in series with a receiver having one end thereof connected to the common potential point, and a third circuit including the transducer having one end thereof connected to the common potential point.
HIGH SPEED TEXTURE DISCRIMINATOR FOR ULTRASONIC IMAGING Michael Insana, Stephen Smith, David G Brown, Robert Wagner assigned to The United States Government as represented by the Secretary of the Health and Human Services Tissue signatures are obtained from first and second order statistics of an image texture to discriminate between different normal tissues and to detect abnormal conditions. These signatures describe intrinsic backscatter properties of the tissue imaged, and are used as the basis of an automatic tissue characterization algorithm. A device for on-line classifying of the texture of an image measures a total of four first and second order statistical properties of echo signals of a region of interest (ROI) selected by an operator, the echo signals being contained in an image memory. These can be used to obtain the tissue signatures, to detect low contrast lesions by machine, and to produce parametric images.
4817614 METHOD AND APPARATUS FOR ADAPTIVE FOCUSING IN A MEDICAL ULTRASOUND IMAGING APPARATUS Dietrich Hassler, Heinz Eschenbacher, Wolfgang Haerer, Uttenreuth, Federal Republic Of Germany assigned to Siemens Aktiengesellschaft A sectional plane of the examination subject is first scanned by focused ultrasound transmission beams in an adaptation phase. Disturbing effects from the reflected echo signals which are caused by the inhomogenities in the tissue are thereby measured. In this adaptation phase, correction values for the delay time of the signals of the elemental transducers of the ultrasound array in comparison to the standard focusing are also derived from the measured values. In a following B-image imaging phase, the delay times of the active aperture are then varied dependent on the correction values during the emission and/or during reception. The disturbing effects are thereby compensated. A method and apparatus are disclosed which are especially well-suited for linear array systems and for patients having inhomogeneous tissues.
4817066 TRANSMITTER/RECEIVER FOR ULTRASONIC DIAGNOSTIC SYSTEM Wasa Takasugi, Ryuichi Shinomura, Takeaki Okabe, Higashiyamato, Japan assigned to Hitachi Ltd; Hitachi Medical Co A transmitter/receiver for suppling a pulse power to a transducer and receiving a signal from the transducer comprises a parallel connec213