Quotables
"Fooling around with alternating current is just a waste of time. Nobody will use it, ever."
Thomas Edison ; 1889
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4662223 | Method and means for steering phased array scanner in ultrasound imaging system A phased array of transducer elements in an ultrasound imaging system is selectively directed by grouping transducer elements in the array to form a plurality of groups of adjacent transducer elements. Electrical signals in each group are mixed with a mod... | 05/05/1987 |
| 4598589 | Method of CW doppler imaging using variably focused ultrasonic transducer array Continuous wave (CW) Doppler imaging employs a linear array of transducer elements with a first plurality of elements functioning as an ultrasonic wave transmitter and a second plurality of elements functioning as a receiver of the reflected ultrasonic wa... | 07/08/1986 |
| 4583240 | Data acquisition circuitry for use in computerized tomography system A digital acquisition system for use in a computerized radiation tomography system employs track and hold means associated with each channel of the radiation detector in the tomography system. Each channel of the radiation detector is connected to a volta... | 04/15/1986 |
| 4530363 | Transducer array for sector scan and doppler flow measurement applications An array of transducer elements which can be selectively actuated as a linear array for sector scanning and selectively actuated as a plurality of concentric annular arrays for focused Doppler blood flow measurements.... | 07/23/1985 |
| 4475397 | Method and means for attaining ultrasonic attenuation by vector sample averaging The ultrasonic wave attenuation of tissue undergoing examination is determined by directing a plurality of ultrasonic signals into the tissue, receiving and detecting a measure (e.g. zero crossings) of the frequencies of ultrasonic signals reflected from ... | 10/09/1984 |
| 4475395 | Method for recognizing different frequency dependent scatter mechanisms in non-homogeneous tissues Time gain control of a variable gain amplifier in an ultrasonic scanning system is defined from ultrasonic attenuation of tissue under examination. An ultrasonic signal is directed into the tissue and a reflected signal is detected. The frequency of the r... | 10/09/1984 |
| 4475396 | Method of determining ultrasonic attenuation of tissue using reflective tomographic reconstruction Ultrasonic wave attenuation is determined for a plurality of limited volumes of tissue comprising a body under examination by directing ultrasonic waves through each limited volume along a plurality of vectors, determining a measure of attenuation of the ... | 10/09/1984 |
| 4475400 | Method and means for improving image in an ultrasonic scanning system The image display in an ultrasonic scanning system is improved by compensating electrical signals representing reflections of ultrasonic waves at various distances from a transducer in accordance with the gain and sensitivity of the transducer to reflecti... | 10/09/1984 |
| 4472972 | Ultrasound imaging system employing operator controlled filter for reflected signal attenuation compensation The amplitudes of electrical signals generated by a transducer in an ultrasound scanning system are controlled by applying the electrical signals to an electrical filter whose frequency pass characteristics can be varied. As the ampltude and frequency of ... | 09/25/1984 |
| 4463592 | Method of determining operating characteristics of ultrasonic scanning systems The characteristics of an ultrasonic scanning system, including band-width, center frequency, and spectrum shape of reflected signals, are determined by directing ultrasonic energy from the system into a phantom having known ultrasonic attenuation and det... | 08/07/1984 |
| 4453409 | Ultrasonic sector scanner utilizing rotating transducer An ultrasonic sector scanner which utilizes rotating transducers uses an optical encoder for generating indexing signals. A slip-ring and brush assembly interconnects the transducers and electronic circuitry within the scanner.... | 06/12/1984 |
| 4453550 | Method and means for detecting a periodic wave structure The periodicity of a wave structure is determined by detecting a temporal feature such as zero crossings of the wave, measuring time intervals between zero crossings, and developing a histogram of the time intervals. A periodic structure will exhibit a un... | 06/12/1984 |
| 4452085 | Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like A time gain control (TGC) signal for a variable gain amplifier in an ultrasonic scanner is derived by determining the attenuation at many levels in the object under examination and then constructing the TGC signal based on the cumulative attenuation of an... | 06/05/1984 |
| 4441368 | Method and means for determining ultrasonic wave attenuation in tissue Ultrasonic wave attenuation in an object is determined from the number of zero crossings of a reflected signal as a function of depth. The zero crossing density is indicative of the frequency spectrum, and by comparing the zero crossing density at one lev... | 04/10/1984 |
| 4433304 | Automatic noise rejection for use in scanner and the like In a system such as an ultrasonic scanner in which a signal must be variably amplified with time in response to a time gain control (TGC) signal, automatic noise rejection is provided by periodically comparing amplified noise with a threshold value above ... | 02/21/1984 |
| 4408228 | Method and means for reducing noise in television display system Noise is reduced in the television display of an A trace in an ultrasonic scanner system by integrating digital data representing the magnitude of video signals corresponding to the echos of ultrasonic pulses. The digital integration is accomplished on a ... | 10/04/1983 |
| 4402223 | Ultrasonic sector scanner utilizing rotating transducer An ultrasonic sector scanner using rotating transducers includes a transducer support wheel having a circumferential rim surface with a plurality of recessed seats within the circumferential surface for receiving inwardly facing transducers. The wheel and... | 09/06/1983 |
| 4386528 | Method and means for generating pixel data in an ultrasonic scanning system In an ultrasonic sector scanner in which display control data is obtained from beam reflection vectors for controlling television display pixels, missed pixels in a display horizontal scan line between two vectors are filled by interpolating known pixel v... | 06/07/1983 |
| 4386529 | Method and means for improving video display image An improved still or frozen picture is provided in an ultrasonic sector scanner by generating and displaying two frames. The first frame is identical to the frame generated for dynamic real-time display. The second frame is generated from vectors lying in... | 06/07/1983 |
| 4375671 | Method and means for filtering and updating pixel data Pixel data stored in a display memory of an ultrasonic scanning system is updated in response to new pixel data generated from a reflected ultrasonic wave and stored pixel data. A lookup table of pixel values is provided in a second memory, and the second... | 03/01/1983 |
| 4370646 | Method and means for controlling electron beam in a raster scan monitor In a raster scan display in which electron beam energization during raster line scan is controlled by comparing a raster value to stored magnitude digital data as a raster line is scanned, a control signal for energizing the electron beam includes a lower... | 01/25/1983 |
| 4361043 | Reference voltage generation means for controlling a display A position reference voltage for controlling the electron beam of a display in an ultrasonic scanning system includes circuitry for receiving a position voltage from a scanner in the system, and a voltage from a variable voltage source. When the variable ... | 11/30/1982 |
| 4359904 | Method and means for eliminating fountain effect in an ultrasound system display Pixel data is selectively updated in an ultrasound scanning system in which the monitor display includes a plurality of addressable pixels. A random access memory holds the intensity values for the display pixels, and the memory is updated in response to ... | 11/23/1982 |
| 4359728 | Method and means for minimizing distortion in television display Distortion is minimized in displaying a waveform on a television display where the wave is identified by sequential magnitude points. The midpoint between consecutive magnitude points is determined, and raster line points in the television display are ill... | 11/16/1982 |
| 4356731 | Method and means for generating time gain compensation control signal for use in ultrasonic scanner and the like Time gain compensation is provided in an ultrasonic scanner by storing a digital code in memory representing the desired signal gain for intervals of time during the reflected wave. Gain compensation due to transducer parameter can be provided in digital ... | 11/02/1982 |
