Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 7252648 | Ultrasound puncture system The ultrasound puncture system in accordance with the present invention comprises a handpiece which accommodates an ultrasound vibrator, a puncturing probe for transmitting ultrasound waves to a biological wall which is to be punctured, an outer cover tube covering ... | 08/07/2007 |
| 4889125 | Method for the determination of iron stores in organic tissue and NMR spectrometer for performing this method A method for the determination of iron stores in organic tissue consists in measuring the relaxation time of deuterium included in said tissue by magnetic resonance spectroscopy.... | 12/26/1989 |
| 4743853 | Nuclear spin tomograph The invention relates to a nuclear spin tomograph in which means for the homogenization of the normally present magnetic fields are provided. These means are formed by iron plates (24a, 26a, 28a), whose form, size, arrangement and number are chosen accord... | 05/10/1988 |
| 4728894 | High frequency coil for an NMR apparatus A high frequency coil for nuclear magnetic resonance comprises a saddle coil formed by interposing electric insulator members between adjacent ones of a plurality of metal straps. The metal straps are copper straps, and the electric insulator members are ... | 03/01/1988 |
| 4722345 | Ultrasonic diagnostic multiple-sector image display system In an ultrasonic imaging system echo signals representative of the amplitude of ultrasonic energy returning along a plurality of angularly spaced paths are sampled at a constant speed and stored into a buffer memory. At a speed inversely proportional to t... | 02/02/1988 |
| 4719923 | Non-invasive blood flow measurements utilizing autoregressive analysis with averaged reflection coefficients A system for non-invasively determining the amount of blood flow within an internal patient blood vessel by performing an autoregressive analysis of Doppler shifted acoustical signals resulting from the reflection of ultrasonic signals due to blood cell m... | 01/19/1988 |
| 4712563 | Method of and apparatus for determining the diastolic and systolic blood pressure of a patient A technique is disclosed herein for obtaining the diastolic and systolic blood pressures of a particular patient by generating cuff pulses of the patient and using these cuff pulses as the only information relating to the blood pressure of the patient in ... | 12/15/1987 |
| 4708127 | Ultrasonic generating system with feedback control An ultrasonic generating system for coupling vibrating energy into a load, such as living tissue, has been described which employs a piezoelectric crystal having excitation electrodes on opposite faces thereof. A feedback electrode is disposed on one face... | 11/24/1987 |
| 4703276 | Permanent magnet ring assembly for NMR imaging system and method for using such assembly An NMR imaging system includes apparatus for producing a uniform magnetic field in a predetermined volume. Such apparatus includes a ring assembly having an axial extent L defined by a plurality of nonmagnetic rings, each having an axis and positioned sid... | 10/27/1987 |
| 4702258 | Device for combined B-scan and B/A imaging The combined modality device comprises an ultrasound transducer (10) which is suitable for transmission as well as reception and which is connected to a transmitter stage (20) as well as to a receiver stage (30). The transducer (10) has a bandwidth which ... | 10/27/1987 |
| 4700715 | Device for detecting nocturnal penile erections A device which is circumferentially affixed to a flaccid penis about the proximal portion of the shaft thereof prior to retiring at night. The device is in the form of a band of material which includes an expandable portion which will not retract once exp... | 10/20/1987 |
| 4697594 | Displaying a single parameter image A method and apparatus for displaying an image which has a wide dynamic range. Low spatial frequency components of the image are extracted from the image signal and are presented as a color overlay which tints an intensity modulated display of local high ... | 10/06/1987 |
| 4697595 | Ultrasonically marked cardiac catheters The hollow cylindrical wall of the catheter is composed of flexible, electrically insulating, ultrasonically transparent material. Embedded therein are spaced tubular-shaped ultrasonic piezoelectric transducers which substantially surround the lumen. The ... | 10/06/1987 |
| 4698595 | NMR-apparatus with an adjustable RF tuning circuit The invention relates to a drive mechanism for adjusting an element by means of which the resonance frequency in an NMR-apparatus can be varied. The mechanism comprises a coil which is exposed to the main magnetic field off the NMR-apparatus. The coil is ... | 10/06/1987 |
| 4697148 | Process for the excitation of a sample for NMR tomography The use of longer 180° pulse sequences for the generation of spin echos is made possible according to the invention during NMR tomography using the 2d-Fourier transformation process in that the phase coding gradient between each pair of 180° pulses is s... | 09/29/1987 |
| 4693319 | Correlation detection type ultrasound blood flowmeter A correlation detection type ultrasound blood flowmeter for measuring speed of flowing blood which is passing across two sample volumes which are respectively positioned at the same distance to each other from the blood flowmeter on two sound-beams formed... | 09/15/1987 |
| 4691714 | Rheological testing apparatus and method The device electronically measures fluid viscosity and temperature simultaneously principally for determining the changes in the properties of cervical mucus at the onset of ovulation. Interdigital transducers are used to generate and detect surface and b... | 09/08/1987 |
| 4691707 | AM/FM hybrid ultrasonic imaging An ultrasonic acoustic imaging system includes a transmitter, a sonic pulse transducer which both applies acoustic pulses to the object under examination and receives echoes or reflected impulses, a digital scan converter, a display, and special reflected... | 09/08/1987 |
| 4690150 | Producing pseudocolor images for diagnostic ultrasound imaging A method for displaying the values of two parameter at a plurality of points in an image. The intensity of each pixel in the display is modulated in accordance with the value of the first parameter at corresponding points in the image. The hue of each pix... | 09/01/1987 |
| 4691163 | Dual frequency surface probes A radio frequency surface probe for data acquisition in magnetic resonance systems. The probe is comprised of a plurality of inductors connected together with tuning capacitors in a balanced configuration. The configuration enables the probe to be impedan... | 09/01/1987 |
| 4688578 | Ultrasonic probe device A probe has a step portion between its upper and lower lateral faces. A water bag has a container portion for containing water therein, and an engaging portion which is integrally formed with the container portion and which has a greater wall thickness th... | 08/25/1987 |
| 4689565 | Nuclear magnetic resonance apparatus having a communication system In a nuclear magnetic resonance apparatus, a loudspeaker element free of magnetic material acts as an acoustic reproduction element. The loudspeaker element is arranged in the magnet space so that the main field of the magnet acts to generate a Lorentz dr... | 08/25/1987 |
| 4689561 | Nuclear magnetic resonance spectroscopy The present invention provides a nuclear magnetic resonance spectroscopy that permits one to see changes in spectra without the use of long-range coupling even if the obtained resonance lines split into complex multiplet patterns. The spectrometry compris... | 08/25/1987 |
| 4688576 | Ultrasonic transducer probe assembly A mechanical transducer probe assembly is provided which is both rugged and easy to assemble. The probe mechanism is located inside a hollow probe case. A reference point for assembly is located on the inner surface of the case. A motor assembly and a tra... | 08/25/1987 |
| 4685468 | NMR imaging system using field compensation NMR imaging is achieved in the presence of temporal variations in the magnetic field. The volume is excited using broadband excitation. A signal is picked up in the plane of interest, using a small coil, and used to determine the frequency of the subseque... | 08/11/1987 |
| 4683893 | Amplitude conditional signal processing for ultrasound frequency estimation In an ultrasonic diagnostic system the invention utilizes the concept that for pulse echo medical ultrasound signals the mean instantaneous frequency estimates are improved by imposing the condition that a local frequency estimate is ignored unless a cond... | 08/04/1987 |
| 4684889 | NMR apparatus compensated for primary field changes An object which can provide a reference for measuring the intensity of a primary magnetic field, is positioned in the vicinity of a subject being examined. A variation in the primary magnetic field intensity is detected, based on a frequency shift of data... | 08/04/1987 |
| 4682604 | Coincidence counting emission tomographic probe: method and apparatus This invention comprises a method and apparatus for measuring both the absolute levels and variations of radioactivity emitted following administration of suitable radioisotopes during a test period by selected organs. Miniaturized radiation detectors for... | 07/28/1987 |
| 4681119 | Method of production and use of microbubble precursors In the inventive method, microbubbles are formed in body liquid or carrier liquid, for example within the genitourinary or digestive systems in order to alter the transmission characteristics thereof to electromagnetic and sonic waves transmitted therethr... | 07/21/1987 |
| 4682106 | Methods of, and apparatus for, proton decoupling in nuclear magnetic resonance spectroscopy A method for proton decoupling, nuclear Overhauser enhancement and/or in selective saturation magnetic resonance spectroscopy, particularly relevant to in vivo spectroscopic imaging, utilizes a radio-frequency pulse modulated with a truncated (sinc X)/X f... | 07/21/1987 |
| 4681120 | Ultrasonic diagnosing apparatus Water is filled in a receptacle, and an ultrasonic-wave transmitting flexible membrane is attached to the receptacle in a watertight manner. An ultrasonic probe is provided in the receptacle for mechanical scanning. The receptacle is coupled with a pipe t... | 07/21/1987 |
| 4682111 | Magnetic resonance imaging magnet A magnet for use in a magnetic resonant imaging device comprising pole pieces and a return magnetic path constructed of magnetic field conductive material and comprising activating coils, one located around each pole piece which, when activated, generate ... | 07/21/1987 |
| 4679565 | Ultrasonic diagnostic apparatus using non-linear parameters of an organ Disclosed are a method and apparatus for displaying a tomographic image based upon a non-linear parameterinside an organ. An ultrasonic transducer radiates to the organ ultrasonic burst waves of two different frequencies ω1 and ω2 at a predetermined tim... | 07/14/1987 |
| 4680550 | High-frequency antenna device in apparatus for nuclear spin tomography and method for operating this device An antenna device for coupling to a magnetic high-frequency field in apparatus for nuclear spin tomography, includes at least two conductor sections of predetermined length which extend on an imaginary cylinder surface parallel to the direction of the axi... | 07/14/1987 |
| 4676251 | Improved method and device for measuring frequency dependent parameters of objects by means of ultrasound echography A device for the scanning of media by means of ultrasound echography, comprising at least one ultrasonic transducer (10) which is associated with a transmitter stage (50) and with a receiver-stage which comprises a conventional first processing circuit (1... | 06/30/1987 |
| 4676252 | Double indicator pulmonary edema measurement Patient monitoring method and apparatus for measurement of in vivo extra vascular lung water (pulmonary edema) and pulmonary circulatory system thermal bypass utilizing double indicator dilution with temperature and electrical conductivity modifiers. A th... | 06/30/1987 |
| 4676255 | Telemetric in-vivo calibration method and apparatus using a negative pressure applicator A method and apparatus are presented here which extend previous concepts of my patents and papers involving the in-vivo calibration of a telemetric pressure sensor by utilizing variations of positive and negative applied pressures on the skin which overli... | 06/30/1987 |
| 4674516 | Ultrasonic delay line matrix switch check system The equipment in this invention provides an ultrasound diagnostic equipment with a matrix switch checking means configured in a combined use with means commonly furnished to said device heaving a built-in test sequencer, whereby taps on the delay line is ... | 06/23/1987 |
| 4674514 | Ultrasonic compound scan with an oscillating transducer A real-time method and appartus is disclosed for scanning large body areas to produce an ultrasound cross-sectional picture of the area in which at least two different and partially overlapping sector scans of the body are carried out in one scanning plan... | 06/23/1987 |
| 4674517 | Noninvasive ultrasonic probes An ultrasonic probe for insonifying the ascending aorta of a supine or reclining human patient. The probe has a head housing transducers for insonifying the patient's ascending aorta and for intercepting doppler-shifted energy reflected from the proximate... | 06/23/1987 |
