Matches 51 - 100 out of 124 < 1 2 3 >
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5579768 Automatic gain compensation in an ultrasound imaging system  
The invention includes a method and system for automatic gain compensation in an ultrasound imaging system. The method and system may be used in place of, or in addition to, gain compensation...
5568446 Dual mode ultrasonic imager system  
A dual mode ultrasonic imager system operative in both a two dimensional 2-D) mode and doppler mode, includes a plurality of transducers for receiving analog ultrasonic signals and converting them...
5531117 Closed loop maximum likelihood phase aberration correction in phased-array imaging systems  
A phased array ultrasonic imaging system performs a scan in which beamforming time delay errors due to nonuniformity in ultrasound speed within the transmission medium are corrected by estimating...
5524623 Adaptive artifact suppression for ultrasound imaging  
A method for operating a digital computer to suppress reverberation artifacts in an ultrasound image. The image includes an ordered array of pixels, each the pixel corresponding to the intensity of...
5524626 System and method for determining local attenuation for ultrasonic imaging  
Power values of backscattered ultrasonic echoes from an interrogation region of a patient's body are stored in a 2-D envelope table. The region is thereby represented as a 2-D pattern of image...
5501219 Real-time dynamic time-of-flight calculator  
Time-of-flight calculations may be simplified by performing them on the fly at selected intervals and then interpolating the results to obtain a comprehensive set of values. The method and...
RE35148 Frequency diversity for image enhancement  
Methods for improving the availability of information derived from signals received from an object irradiated with coherent pulses of any form of radiation that exhibits a wave nature are...
5452722 Ultrasound bone analyser  
An ultrasound bone analysis apparatus having locating means (14) such as a foot bed, for locating a patient's body part in a predetermined position, and a pair of ultrasonic transducers (20, 22)...
5433203 Bone assessment apparatus and method  
A bone assessment apparatus provides a precise bone assessment based on the attenuation factor of an ultrasonic wave which has passed through a bone of a patient. A transmitting transducer and a...
5427105 Measuring procedure for the thickness of the mucous membrane of an alveolar process  
The device for measuring the thickness of the mucous membrane in the region of the jawbone ridge consists of an evaluation instrument and a hand probe interconnected by a cable. The hand probe has...
5417215 Method of tissue characterization by ultrasound  
An ultrasound method and apparatus for classification of tissue in a region of interest in a body. The raw ultrasound return data is digitized and processed without the need for human visual...
5388461 Beamforming time delay correction for a multi-element array ultrasonic scanner using beamsum-channel correlation  
An ultrasonic imaging system for performing a scan in which beamforming time delay errors due to nonuniformity in sound speed within the transmission medium are corrected employs a multiple channel...
5361767 Tissue characterization method and apparatus  
A method and apparatus for non-invasively determining a type of tissue and its state within a living entity are disclosed. The method includes the steps of using an imaging technique to generate an...
5315512 Apparatus and method for generating image representations of a body utilizing an ultrasonic imaging subsystem and a three-dimensional digitizer subsystem  
The disclosure is directed to an apparatus and method for producing a three-dimensional image representation of a body. The body can be animate or inanimate; i.e. the invention can be used to...
5293871 System for ultrasonically determining corneal layer thicknesses and shape  
An ultrasound system that enables determination of layer thicknesses and contours of a multi-layer organic body includes a transmitter/receiver for obtaining a radio frequency signal from echoes...
5279301 Ultrasonic image analyzing apparatus  
An ultrasonic image analyzing apparatus determines, on the basis of ultrasonic tomographic image information on a body portion being inspected, the properties of the tissues of the inspected...
5259384 Ultrasonic bone-assessment apparatus and method  
Non-invasive, quantitative in-vivo ultrasonic evaluation of bone is performed by subjecting bone to an acoustic excitation pulse supplied to one of two transducers on opposite sides of the bone,...
5253530 Method and apparatus for reflective ultrasonic imaging  
A method and related system for use in producing a representation of acoustical impedances of body materials, such as for use in ultrasonic imaging of a body for diagnostic purposes. In the method,...
5235983 Ultrasonic imaging apparatus  
An ultrasonic imaging apparatus for obtaining a tomogram image of an object to be diagnosed on a monitor includes electroacoustic transducers, a phasing unit, a phase detection unit, and an adding...
5224480 Ultrasonic imaging apparatus indicating dispersion of characteristic parameter of medium  
An ultrasonic imaging apparatus for obtaining a two-dimensional distribution of a predetermined characteristic parameter of a medium of the ultrasound at various points in a plane. The apparatus...
5218963 Ultrasonic bone analysis device and method  
An instrument for measuring the strength and integrity of bone in vivo by ultrasound pulse taking its data by measurement of the os calcis or heel bone. The measured data is processed so that the...
5218869 Depth dependent bandpass of ultrasound signals using heterodyne mixing  
An ultrasound imaging system and method for examining the interior of an object. The imaging system includes an apparatus for transmitting and receiving ultrasound waves. A receiver amplifies echo...
5197477 Ultrasonic Doppler flow measurement system with tissue motion discrimination  
An ultrasonic diagnostic system for measuring fluid flow velocities through Doppler techniques is provided which eliminates the effects of tissue motion from fluid flow velocity information. In a...
5178148 Method of automatically measuring the volume of a tumor or of a gland, in particular the prostate, a measuring device, and a method and apparatus constituting and application thereof  
The invention relates to a measuring method for automatically measuring the volume of a tumor or of a gland, and also to a measuring device. The measuring device comprises an endocavitary detector...
5158087 Differential temperature measurement for ultrasound transducer thermal control  
The surface temperature of tissue adjacent to an ultrasound transducer in an ultrasound imaging probe is determined by a differential measurement technique. A first temperature representative of...
5150714 Ultrasonic inspection method and apparatus with audible output  
An ultrasonic inspection system and method having an audible signal output is shown which includes an ultrasonic transducer (10) for pulse insonification of an object (12) under control of pulser...
5143069 Diagnostic method of monitoring skeletal defect by in vivo acoustic measurement of mechanical strength using correlation and spectral analysis  
A diagnostic method for determining in vivo mechanical strength and structural integrity of hard tissues such as bones, in a non-invasive and non-dramatic manner. The method separates ultrasound...
5121364 Time frequency control filter for an ultrasonic imaging system  
A phased array sector scanning ultrasonic imaging system produces digitized baseband samples of the received ultrasonic echo signals amplified by a time gain control (TGC) to compensate for...
5113866 Method for ultrasound imaging  
A method for generating an ultrasound image of a plane of a section of an examination subject having a non-uniform speed of sound distribution near the surface of the subject includes the steps of...
5100318 Ultrasonic method and apparatus for measuring the periodontal pocket  
A noninvasive probe effects a method of measuring the depth of the periodontal pocket along an outer surface of a tooth wherein the depth is measured from an outer gum ledge tooth surface adjacent...
5095909 Ultrasound diagnostic equipment  
Ultrasound diagnostic equipment for diagnosing a region of interest of an organ by using a scattering coefficient and an attenuation slope comprises a scattering power calculation unit for...
5090412 Ultrasonic diagnosis apparatus  
The present invention for realizing an ultrasonic diagnosis apparatus for displaying a high-quality image having a smaller amount of speckle noise is characterized in that receiving signals of a...
5069664 Intravascular ultrasonic angioplasty probe  
A probe for ultrasonically removing unwanted biological material, for example, from a vessel in a patient's cardiovascular system, includes a catheter assembly having distal and proximal catheter...
5052394 Method and apparatus for ultrasonic beam compensation  
In ultrasonic echoscopy, when an object to be examined has overlying layers of a medium (for example, fat, muscle, skin or bone) which have different ultrasonic transmission characteristics from...
RE33672 Method for measuring characteristics of living tissue by ultrasonic waves  
Ultrasonic waves of at least three independent frequency bands having different center frequencies are transmitted into a living body from its skin surface and reflected waves are analyzed, by...
5031627 Method and apparatus for characterizing reflected ultrasonic pulses  
The invention is a method of and apparatus for characterizing the amplitudes of a sequence of reflected pulses R 1 , R 2 , and R 3 by converting them into corresponding electrical signals E 1 , E...
5010885 Ultrasonic echograph with controllable phase coherence  
On emission and/or on reception, circuits impose on the signals emitted and/or received, delays in accordance with a random or pseudo-random delay law. On emission, just as on reception, this delay...
4993416 System for ultrasonic pan focal imaging and axial beam translation  
The present invention provides a novel method and apparatus which allows concomitant imaging and rapid axial beam translation measurements used to calculate the attenuation characteristics of a...
4941474 Multivariable analysis of bone condition  
A system for analyzing bone conditions, particularly (but not solely) for diagnosing osteoporosis and periodontal bone disease in humans. An ultrasonic signal (generally a pulse) having components...
4867167 Method and apparatus for determining and displaying the absolute value of quantitative backscatter  
This invention teaches method and apparatus for determining backscatter attenuation, for utilizing backscatter attenuation to determine the absolute value of quantitative backscatter from a...
4866614 Ultrasound characterization of 3-dimensional flaws  
This ultrasound imspection method using the Born approximation simplifies the problem of characterizing 3-dimensional flaws of general shape by reducing it to a series of 2-dimensional tomographic...
4855911 Ultrasonic tissue characterization  
Methods and devices for characterizing tissues and the like utilize signals obtained from ultrasonic backscatter processes. The method accounts for frequency-dependent attenuation,...
4852576 Time gain compensation for ultrasonic medical imaging systems  
Time gain compensation is provided on an automatic basis by storing an amplification gain function for an amplifier operating on the received signals and automatically varying the function until...
4844082 Ultrasonic examination apparatus  
The present invention relates to an ultrasonic examination apparatus which transmits ultrasonic waves into a body to be examined and receives the echo signals therefrom for examination of the...
4841492 Apodization of ultrasound transmission  
An apodization attenuation circuit to achieve a selected percent Gaussian apodization of a focused ultrasound wavefront when transmitted from a linear or phased array. The circuit uses a string of...
4836210 Ultrasonic analyzer  
An ultrasonic analyzer used in an ultrasonic diagnosis instrument for minimizing the effects of noise in echo signals. The analyzer includes: a first unit for determining a start point and an end...
4830015 Method and system for measuring an ultrasound tissue characterization  
An ultrasonic image of a living body is obtained by use of an ultrasonic apparatus and, an ultrasound tissue characterization value at a region of interest of the body, such as the ultrasound...
4805622 Direction-finding system for localization of reflection-causing nterfaces in the human body  
A direction-finding system for localization of reflection-causing interfaces in the human body, in particular those of concretions, consists of at least one transmitter (18) emitting pulsed...
4803994 Backscatter data collection technique for ultrasound  
A rapid, non-invasive realtime modality for detecting differential backscatter in ultrasound is achieved using narrowband interrogating frequencies to maximize signal-to-noise ratio and to minimize...
RE32782 Method for determining in vivo, bone strength  
A system for establishing, in vivo, the strength of bone in a live being such as, for example, a horse. The system permits determination of the speed of travel of sound through the bone and the...
Matches 51 - 100 out of 124 < 1 2 3 >