Patent application number | Description | Published |
20100202254 | CMUTS WITH A HIGH-K DIELECTRIC - A capacitive ultrasound transducer includes a first electrode, a second electrode, and a third electrode, the third electrode including a central region disposed in collapsibly spaced relation with the first electrode, and a peripheral region disposed outward of the central region and disposed in collapsibly spaced relation with the second electrode. The transducer further includes a layer of a high dielectric constant material disposed between the third electrode and the first electrode, and between the third electrode and the second electrode. The transducer may be operable in a collapsed mode wherein the peripheral region of the third electrode oscillates relative to the second electrode, and the central region of the third electrode is fully collapsed with respect to the first electrode such that the dielectric layer is sandwiched therebetween. Piezoelectric actuation, such as d31 and d33 mode piezoelectric actuation, may further be included. A medical imaging system includes an array of such capacitive ultrasound transducers disposed on a common substrate. | 08-12-2010 |
20110040189 | COLLAPSED MODE OPERABLE CMUT INCLUDING CONTOURED SUBSTRATE - A capacitive ultrasound transducer capable of operation in collapsed mode either with a reduced bias voltage, or with no bias voltage, is provided. The transducer includes a substrate that is contoured so that a middle region of the flexible membrane is collapsed against the substrate in the absence of a bias voltage. A non-collapsible gap may exists between the substrate and peripheral regions of the flexible membrane. The contour of the substrate may be such as to strain the flexible membrane past the point of collapse, or to mechanically interfere with the flexible membrane. The substrate may include a further membrane disposed beneath the flexible membrane, the further membrane being contoured so that the flexible membrane is collapsed against it. The substrate may a support disposed beneath the further membrane to deflect a corresponding portion of the further membrane upward toward the flexible membrane. The support may be a post. The transducer may be operated in collapse mode with an improved efficiency (k | 02-17-2011 |
20110076638 | APPARATUS FOR CLEANING TEETH USING A VARIABLE FREQUENCY ULTRASOUND - The apparatus includes a source of gas (air) bubbles ( | 03-31-2011 |
20110256503 | ULTRASONIC TEETH CLEANING APPLIANCE HAVING SPATIAL, TEMPORAL AND/OR FREQUENCY VARIATIONS - The appliance includes an appliance body ( | 10-20-2011 |
20120143062 | MAGNETIC DIAGNOSTIC PROBE CONNECTOR SYSTEM - A magnetic connection system suitable for use with a wireless ultrasound probe which utilizes a plurality of magnets to facilitate coupling between said probe and a diagnostic or clinical device in a manner which minimizes the effects of stray magnetic fields on the device. | 06-07-2012 |
20130296698 | ADJUSTING MEASUREMENTS OF THE EFFECTS OF ACOUSTIC RADIATION FORCE FOR BACKGROUND MOTION EFFECTS - An ultrasonic diagnostic imaging system for shear wave measurement transmits push pulses into tissue for the generation of shear waves. Characteristics of the shear waves such as their velocity of passage through the tissue are measured to assess properties such as tissue stiffness. The measurements are compensated for effects of background motion by sampling echo signals from the tissue at different times and comparing the samples to detect the presence of relative motion between the ultrasound probe and the region of interest where shear waves are detected. Sensed background motion is used to adjust measured shear wave characteristics. | 11-07-2013 |
20130331705 | ULTRASONIC CMUT WITH SUPPRESSED ACOUSTIC COUPLING TO THE SUBSTRATE - An array of cMUT cells are formed on individually isolated massive plates on a substrate. The mass of each plate provides an inertial force in opposition to the force and motion of transmission by the cell which reduces the resultant translation of motion in the plate. The reduction in motion results in less coupling of acoustic energy into the substrate and contamination of the signals of adjacent cMUT cells by lateral waves. The unwanted wave coupling into the substrate can be further damped by compliant or sparse periodic mounting of the massive plates on the substrate. | 12-12-2013 |
20140005548 | ULTRASONIC ACOUSTIC RADIATION FORCE EXCITATION FOR ULTRASONIC MATERIAL PROPERTY MEASUREMENT AND IMAGING | 01-02-2014 |
20140247698 | PRE-COLLAPSED CAPACITIVE MICRO-MACHINED TRANSDUCER CELL WITH PLUG - The present invention relates to a pre-collapsed capacitive micro-machined transducer cell ( | 09-04-2014 |
20140251014 | PRE-COLLAPSED CAPACITIVE MICRO-MACHINED TRANSDUCER CELL WITH STRESS LAYER - The present invention relates to a pre-collapsed capacitive micro-machined transducer cell ( | 09-11-2014 |
20140265721 | PRE-COLLAPSED CAPACITIVE MICRO-MACHINED TRANSDUCER CELL WITH ANNULAR-SHAPED COLLAPSED REGION - The present invention relates to a pre-collapsed capacitive micro -machined transducer cell ( | 09-18-2014 |