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Hitachi Medical Corporation Patents
Assignee:
Hitachi Medical Corporation
Address:
Tokyo, JP
No. of patents:
579
Patents:


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Patent Number Title Of Patent Date Issued
6333590 Ultrasonic transducer having laminate structure, ultrasonic probe and production method thereof December 25, 2001
An ultrasonic probe comprising, in an array form, ultrasonic oscillators of a laminate structure fabricated by alternately laminating oscillation element layers and electrode layers, wherein the number of laminate layers of each ultrasonic oscillator becomes greatest at the center and de
6318892 Radiography apparatus with rotatably supported cylindrical ring carrying image pickup unit November 20, 2001
A radiography apparatus is constituted by an image pickup unit including an X-ray source for irradiating cone shaped X-ray beams to a patient under examination and an image receptor disposed opposite the x-ray source for receiving x-ray image data of the patient by the irradiated cone sh
6301331 Digital radiography system having an X-ray image intensifier tube October 9, 2001
A digital radiography system obtaining x-ray images of a patient body through an X-ray image intensifier tube and a video camera optically coupled with the X-ray image intensifier tube. The diameter of an input imaged size of the X-ray image intensifier tube is ranged from 254 to 457
6299580 Ultrasonic probe and ultrasonic diagnostic apparatus using the same October 9, 2001
An ultrasonic probe which improves the directivity of the ultrasonic transmission beam by reducing the grating lobes at the time of transmitting ultrasonic waves. An ultrasonic probe 1 comprising a plurality of transducers 2 for transmitting ultrasonic waves and for receiving the ref
6269140 X-ray computerized tomography apparatus control method therefor and image generating method usin July 31, 2001
An X-ray computerized tomography apparatus which includes: an X-ray generating source for irradiating an object with X-rays; a unit for detecting X-rays transmitted through the object; a scan unit for controlling direction of irradiation with X-rays so that a periphery of the object
6261232 Continuous wave transmission/reception type ultrasonic imaging device and ultrasonic probe July 17, 2001
A high frequency continuous wave capable of achieving sufficient lateral resolution is produced by a wave transmitting device (20) to constitute a transmitted ultrasonic wave. A frequency of the continuous wave is alternated in a rectangular wave manner by a frequency modulator (15) so
6225729 Ultrasonic probe and ultrasonic diagnostic apparatus using the probe May 1, 2001
An ultrasonic probe including a plurality of transducer elements for transmitting an ultrasonic wave and receiving a reflected ultrasonic wave from inside of an object to be examined, electrodes for applying a voltage to the transducer elements, and an acoustic matching layer for taking
6222365 Magnetic resonance imaging apparatus and method April 24, 2001
In a magnetic resonance imaging apparatus including a pulse sequence control unit for controlling a pulse sequence to acquire echoes while both a radio frequency magnetic field and a gradient magnetic field are applied to an object under examination present in a static magnetic field; an
6218837 Magnetic resonance imaging system April 17, 2001
A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed a
6154110 Gradient magnetic field coil and magnetic resonance imaging apparatus using the same November 28, 2000
A gradient magnetic field coil for use in a magnetic resonance imaging apparatus having a magnet for generating a homogeneous magnetic field area by a magnetic field from a magnetic field generation source accommodated in a cooling container and generating a static magnetic field in a
6118273 Magnetic resonance imaging method and device therefor September 12, 2000
In a magnetic resonance imaging method in which after irradiating RF pulses of magnetic resonance frequencies into an object to be inspected, a sequence of detecting echo signals sequentially and a step of reconstructing an image by making use of the obtained echo signals are repeate
6101239 Medical imaging apparatus August 8, 2000
A medical imaging apparatus comprises magnetic resonance imaging means (30) for obtaining a MR tomogram of an object to be examined, X-ray radiographic means (11,12,13) for obtaining a radiographic image of the object and imaging control means for controlling overall timings of appli
6097185 Magnetic resonance imaging apparatus August 1, 2000
An MRI apparatus essentially consisting of a static magnetic field generating system, a gradient magnetic field generating system, a transmission system, a receiving system, a sequencer, a signal processing system and means for displaying the resulting image, wherein the sequencer ge
6095685 X-ray radioscopic apparatus August 1, 2000
An X-ray radioscopic photographing apparatus comprises a top-board support frame for supporting a top board in the body axis direction of an examinee, a stand for supporting the top-board support frame so as to be rotatable about the body axis, a support for holding an X-ray tube unit
6084981 Image processing apparatus for performing image converting process by neural network July 4, 2000
An image processing apparatus using a neural network having: an image supplying unit for supplying spatiotemporal data of a predetermined region including a target pixel of an image; and a neural network formed by coupling a plurality of artificial neuron models so as to have at least an
6061422 X-ray ct apparatus and an image reconstructing method for obtaining a normal reconstructed image May 9, 2000
An image reconstructing method in relation to an X-ray CT apparatus for shifting, sequentially by a predetermined angle, a reconstructed image for a projection angle in a predetermined range so as to obtain a continuous reconstructed image, in which one normal reconstructed image is obta
6049208 Open type magnetic resonance imaging system which allows for easy access to the patient being ex April 11, 2000
A magnetic resonance imaging system includes a lower body which has a flat upper surface, and contains a first magnetic pole, an upper body which has a lower surface disposed in opposed relation to the upper surface of the lower body, and contains a second magnetic pole, a bed disposed a
6045262 Apparatus and method for controlling table in medical diagnosis system April 4, 2000
A control apparatus for controlling movement of a table supporting an object under inspection in a medical diagnosis system includes a driving power unit for moving the table, a position detector for outputting a signal indicating a position of the table, a positioning servo-control
6037850 Superconducting magnet apparatus and method of regulating magnetization thereof March 14, 2000
A small-sized high-precision superconducting magnet apparatus which can prevent an occurrence of the principal factor in generating a quench and can restrain the magnetic flux from varying with time, and a method of regulating the magnetization of such a superconducting magnet apparatus,
6027247 X-ray photographing apparatus February 22, 2000
A X-ray photographing apparatus is suitable for use for a doctor to take X-ray photographing while performing medical treatment, and is capable of positioning a patient at a height at which operations are made ease in accordance with contents of medical treatment. The X-ray photographing
5995108 3D image composition/display apparatus and composition method based on front-to-back order of pl November 30, 1999
An apparatus for composing and displaying a three-dimensional image comprises a device for computing a plurality of two-dimensional projected images from the same direction of a viewing line by a volume rendering scheme for each of a plurality of regions of interest set on three-dime
5987091 X-ray CT system November 16, 1999
Projection data having a phase difference of 180.degree. from each other, which are obtained through a 1/4 offset detector, are arranged alternately to obtain projection data of the high resolution, and a CT image is reconstructed on the basis of the projection data of the high resolutio
5974884 Ultrasonic diagnostic apparatus and ultrasonic probe with acoustic matching layer having continu November 2, 1999
In an ultrasonic probe, an acoustic matching layer, which is fixed on the front side of a transducer for transmitting an ultrasonic wave and receiving a reflected wave thereof and matches in acoustic impedance the transducer to a living tissue in an object to be examined, is formed in
5960058 Method for generating X-ray image and apparatus therefor September 28, 1999
The method for generating an X-ray image of the present invention by correcting a measured fluorographic image or radiographic image and removing the veiling glare component and scattered X-ray component has (1) a step of generating a veiling glare component image and a scattered X-ray
5953013 Method of constructing three-dimensional image according to central projection method and appara September 14, 1999
A method of constructing a three-dimensional image according to a central projection method, in which after a view point, tomographic images and a projection plane are set so that the tomographic images are put between the view point and the projection plane, a projection image is obtain
5951474 Magnetic resonance imaging apparatus for detecting magnetic resonance signals by radio frequency September 14, 1999
RF receiving coil device used in a magnetic resonance imaging apparatus capable of acquiring a tomographic image of an object under examination positioned in a static magnetic field along a predetermined direction including quadrature detection coils for detecting an MR signal component
5949843 X-ray tomography apparatus September 7, 1999
An X-ray computer tomography apparatus equipped with an X-ray scanner for converting X-rays emitted from an X-ray source to a fan beam by a collimator, irradiating the fan beam to an object and detecting the X-rays passing through the object of a multi-channel X-ray detector includes a
5949811 X-ray apparatus September 7, 1999
An X-ray apparatus acquires an X-ray image of an object by radiating X-rays to the object and includes an X-ray radiator for radiating X-rays to an object. An imager acquires an X-ray image of the object and radiation dose controller controls the radiation dose so as to acquire an X-ray
5949080 Irradiation apparatus for effectively performing intermittent irradiation in synchronism with re September 7, 1999
An irradiation apparatus for treating a treated body by irradiating an electron beam of high energy or the like on the foci of the treated body includes, in order to efficiently and stably performing intermittent irradiation in synchronism with respiration, a respiration synchronizing
5939962 Split type magnetic field generating apparatus for MRI August 17, 1999
Annular portions are arranged on mutually confronting surfaces at circumferential edge portions of low-temperature containers, the annular portions forming annular containing portions whose cross section is rectangular. Not only a side coil among a group of coils forming a collective
5936498 Superconducting magnet apparatus and magnetic resonance imaging system using the same August 10, 1999
In a superconducting magnet apparatus for use in a magnetic resonance imaging system, an opening for accommodating a subject is enlarged, so that the subject is prevented from feeling claustrophobic, that an operator easily gets access to the subject, that low magnetic field leakage
5929637 Flow velocity calculating method in magnetic resonance imaging apparatus July 27, 1999
The present invention intends to easily perform arithmetic operations for determining flow velocities without making phase correction and to reduce the aliasing error. To this end, a plurality of data pieces having phase sensitivity are measured using phase contrast pulse sequences in a
5928146 Inspection apparatus using nuclear magnetic resonance July 27, 1999
An inspection apparatus using nuclear magnetic resonance having arithmetic and control means for controlling a pulse sequence for detecting a nuclear magnetic resonance signal from a target to be inspected and calculating the detected signal. The arithmetic and control means controls an
5920660 Tomogram interpolation method for executing interpolation calculation by using pixel values on p July 6, 1999
In an interpolation method which determines interpolation points on a projection line not crossing vertically a plurality of tomograms by interpolation, an interpolation method of tomograms which determines the pixel values of at least two points D1 and D2 on the projection line by i
5900878 Method of constructing pseudo-three-dimensional image for obtaining central projection image thr May 4, 1999
With respect to a stacked three-dimensional image, a point of view and a first projection plane are set, a central projection image is obtained according to a central projection method, and this image is shaded to obtain a first pseudo-three-dimensional image as if the image was observed
5891041 Ultrasonic imaging system adapted for use with ultrasonic probes having different center frequen April 6, 1999
Disclosed herein is an ultrasonic diagnostic apparatus employing two or more ultrasonic probes each comprising a plurality of ultrasonic transducers each for transmitting and receiving an ultrasonic wave, the ultrasonic diagnostic apparatus further comprising: a first storage means f
5891036 Ultrasonic wave Doppler diagnosing apparatus April 6, 1999
A Doppler ultrasound diagnostic apparatus equipped with Doppler detection units and a forward/reverse separating means in an audio signal output system, a complex Doppler signal control means which stores a complex Doppler signal received during the Doppler-mode period and reads out said
5886454 Ultrasonic probe and manufacturing method thereof March 23, 1999
An ultrasonic probe includes a plurality of piezoelectric elements arrayed on acoustic absorption backing material with predetermined spaces, a plurality of acoustic matching members formed on the piezoelectric elements and arrayed with gaps smaller than array gaps of the piezoelectr
5883933 Method and apparatus for displaying three-dimensional image March 16, 1999
A three-dimensional image is displayed on a display in a central projection method based upon a viewpoint which is placed at the inside of an object and a line of sight. In this case, a plurality of tomographic images interposed between the viewpoint and a projection plane are sequential
5880470 Two-dimensional radiation image detector March 9, 1999
A 2-dimensional radiation image detector wherein a plurality of conversion elements for converting a radiation into visible light and a plurality of photo-sensitive elements for detecting the visible light and accumulating signals are formed an elements board includes two elements boards
5878108 Method for generating X-ray image and apparatus therefor March 2, 1999
A radiographic apparatus which can improve at high speed the picture quality of an X-ray fluoroscopic image or an X-ray radiographic image is disclosed. In a radiographic apparatus acquiring an X-ray fluoroscopic image or an X-ray radiographic image and having a scattered X-ray corre
5878107 X-ray radiograph apparatus March 2, 1999
An X-ray radiograph apparatus comprising an X-ray source which irradiates a subject body with X rays of a low level radiation dose during the fluoroscopic operation and irradiates the same with X rays of a high level radiation dose during the radiographic operation; an X-ray image in
5876337 Magnetic resonance imaging apparatus and method for correcting the intensity of the static magne March 2, 1999
An MRI apparatus has a plurality of shim coils 102 and gradient magnetic field coils 104, which are connected to power sources 103 and 105 respectively. These power sources are controlled by a computer 112 to correct intensity of a static magnetic field generated by a magnet. For thi
5875226 Digital radiography system having an X-ray image intensifier tube February 23, 1999
A digital radiography system obtaining X-ray images of a patient body through an X-ray image intensifier tube and a video camera optically coupled with the X-ray image intensifier tube. The diameter of an input imaged size of the X-ray image intensifier tube is ranged from 254 to 457
5848114 Computerized tomography system December 8, 1998
A computerized tomography system including an X-ray source for emitting X-rays in a cone-beam shape, a two-dimensional X-ray image acquirer which is arranged so as to face the X-ray source and acquires an image of an object by using the X-rays; and rotator for rotating the X-ray source a
5842980 Magnetic resonance inspecting method and apparatus December 1, 1998
A person to be inspected lies on his back on the tabletop of the patient table. The person is moved together with the tabletop so that the head of the person which is the inspection part, coincides with almost the center of the superconductive magnet. A control circuit controls the opera
5832056 X-ray examination apparatus November 3, 1998
An X-ray examination apparatus includes an X-ray diagnosis apparatus (first imaging area), an X-ray CT apparatus (second imaging area), a bed, and the X-ray diagnosis apparatus and the X-ray CT apparatus are arranged along a path of movement of a top plate of the bed in such a manner tha
5831168 Ultrasound signal processor November 3, 1998
In an ultrasound signal processor, respective received signals received at received signal processing units are sampled by a sampling clock of a frequency which is sufficiently higher than a Nyquist sampling frequency of an upper limit of a frequency band width for each of the received
5829439 Needle-like ultrasonic probe for ultrasonic diagnosis apparatus, method of producing same, and u November 3, 1998
A needle-like ultrasonic probe includes an inner needle received in a hollow, tubular outer needle for rotation about an axis thereof. The inner needle has a pointed distal end, and a notch is formed in an outer peripheral surface of that portion of the inner needle which is located
5808467 RF probe and inspection system using NMR using the same September 15, 1998
In the inspection system using nuclear magnetic resonance comprising magnetic field generators such as a static magnetic field, a gradient magnetic field, and an RF magnetic field, an RF probe for detecting an NMR signal from a subject, and a calculator for operating a detected signal by
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