Hitachi, Ltd.

Hitachi Medical Corporation

Vertex Standard Company, Ltd.

Hitachi Vlsi Engineering Corp.

Etsuji Yamamoto

Hideki Kohno

Hidemi Shiono

Tetsuhiko Takahashi

Yoshikuni Matsunaga

Kenji Takiguchi

Yo Taniguchi

Hiroyuki Itagaki

Masao Yabusaki

Kensuke Sekihara

Yoshiki Murakami

Shigeru Matsui

Yukari Onodera

Hiroyuki Takeuchi

Hisaaki Ochi

Yoshitaka Bito

Ryuichi Suzuki

Takashi Onodera

Yukiko Ogura

Koichi Sano

Hiroshi Takeuchi

Takayuki Nabeshima

Shigeru Watanabe

Satoshi Hirata

Ryuzaburo Takeda

Shinji Yamamoto

Hideaki Nakane

Tatsuo Nozokido

Koichi A Ono

Yukio Ito

Munetaka Tsuda

Kageyoshi Katakura

Hitoshi Arai

Norihide Saho

Hiroshi Kanda

Yoshito Nejime

Masakatsu Fujie

Masao Kuroda

Yukiji Iwase

Kazutoshi Kan

Kenichi Okajima

Hiroshi Inouye

Fujio Tajima

Koichi Yokosawa

Chitose Nakaya

Hiroshi Nishimura

Toshihiro Ishizuka

Masayuki Otsuka

Sakichi Ashida

Shigeru Jyomura

Katsunori Suzuki

Shinya Okabe

Shin'ichi Shimode

Akihiro Miyajima

Shoji Kondo

Kumio Sawaya

Saburo Adachi

Masuo Kuroda

A radio communication apparatus including an operator control section with at least one actuator for appointing a function setting that may be recorded in a first data structure and thereafter detected and recorded in a second data structure wherein a microprocessor may compare the two settings and issue a modification notification indicating that the initial setting has been changed.

Radio communication apparatus

In a radio communication apparatus according to the present invention, an expansion of the functional capabilities to allow for checking whether functional settings made for a previous communication are different from functional settings for a current communication. Then, if so, notification is made so that the functional settings can be restored to their original states. When an operator sets status registration mode by means of predetermined keys on an operator section for the occasion of an operator change, for example, the micro controller unit (MCU) records functional setting data at that point in the data table of a RAM. Then, when the operator sets a status confirmation mode by the use of predetermined keys in order to resume communication, the MCU records functional setting data at that point corresponding to the functional setting data for the previous communication and the functional items associated therewith. Then, the MCU makes a comparison between the current functional setting data and the previous functional setting data, for each functional item. If the current functional setting data does not coincide with the previous functional setting data, notification is made by the use of an indicator lamp and a liquid crystal display section.

A medical treatment apparatus capable of performing exact medical treatment is provided. The medical treatment apparatus includes detection means for detecting the condition of a human body to be treated, medical treatment means for treating said human body, and display means for displaying results of computing by computing means for computing a plan for said medical treatment on the basis of detection results from said detection means.

Medical treatment apparatus

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 the RF probe, a RF probe for detection comprises a plurality of coils arranged in the predetermined direction and includes a plurality of switching elements and the inspection system selects two or more coils from the plurality of coils for each measurement of NMR signals, turns the switching elements connected to the selected coils ON, turns the switching elements connected to coils other than the selected coils OFF, changes a combination of two or more coils for each measurement of NMR signals, and changes the sensitivity distribution of the RF probe in the predetermined direction according to the Wavelet basis function for each measurement of NMR signals.

RF probe and inspection system using NMR using the same

In an inspecting method based on nuclear magnetic resonance, a burst wave having a plurality of sub-pulses frequency-modulated with a high frequency is generated, the burst wave is amplitude-modulated with at least a function which repeats polarity inversion, the amplitude-modulated burst wave is irradiated, as an exciting high frequency pulse, to an object to be inspected, and gradient magnetic fields are generated in predetermined pulse sequence to measure a nuclear magnetic resonance signal.

Inspecting method and apparatus based on nuclear magnetic resonance

An inspection method by means of an inspection apparatus using nuclear magnetic resonance and having magnetic field generating apparatus for generating a static magnetic field, gradient magnetic fields and an RF magnetic field; magnetic field generating apparatus by means of additional shim coils, which vary homogeneity of the static magnetic field by varying current flowing therethrough; signal detecting apparatus for detecting nuclear magnetic resonance signals from an object to be inspected; an apparatus for processing signals detected by the signal detecting apparatus; and control apparatus for controlling currents flowing through the shim coils, which method using nuclear magnetic resonance comprises a step of storing shim currents corresponding to each of a plurality of slices, capable of improving homogeneity of the static magnetic field for each of the plurality of slices, and a step of switching over the shim currents to those corresponding to a relevant slice to be measured prior to measurements of nuclear magnetic resonance signals from the slice. This inspection method can be applied also to a case where measurements of other slices are effected in intervals of measurements of the relevant slice.

Inspection method and apparatus using nuclear magnetic resonance

Analysis of electromagnetics for an antenna analyzes a current on a conductor having a junction between a linear conductor and a planar conductor relying upon a moment method. A planar dipole segment 9 includes a planar monopole 91-2 in which the current flows in the same direction as the current flowing through part of a quadrangle 41-2-4 of a radial segment 41, and a planar monopole 91-1 in which the current flows in the same direction as the current flowing in a planar monopole 35-1 of a planar dipole segment 35. In the vicinity of the junction between the linear conductor and the planar conductor, currents are expressed that flow through the vicinity of the junction where three segments consisting of a radial segment and two planar dipole segments are overlapped one upon the other.

Method and apparatus for the analysis of electromagnetics

A bolus of magnetized blood is formed by at least two radio frequency magnetic fields, and readout gradient magnetic fields are repeatedly applied at a proportion of 1:-2:1 along a blood vessel so as to continuously obtain a first echo signal whose phase change due to velocity is corrected, from the moving bolus. This first echo signal provides velocity information on the blood stream. The sequence of the readout gradient magnetic fields is repeatedly applied at a proportion of (.sqroot.2-1):-2:2:-(.sqroot.2-1) so as to continuously obtain a second echo signal whose phase change due to velocity and acceleration is corrected, from the moving bolus. Acceleration information of the blood stream is extracted by calculating the difference between the first echo signal and the second echo signal. The velocity information and/or the acceleration information is displayed in superposition with a specific blood vessel of an angiogram shot in advance.

Fluid measurement method using nuclear magnetic resonance imaging and

An inspection apparatus using magnetic resonance includes magnetic field generators for generating a static magnetic field, a gradient magnetic field and a radio frequency magnetic field, respectively, a signal detector for detecting magnetic resonance signals from an inspected object, a computer for executing arithmetic operations for detection signals from the signal detector and an output device of the result of the arithmetic operations by the computer. The gradient magnetic field generator includes first and second gradient coils, the first gradient coil is a coil fixed to a magnet for generating a static magnetic field, the second gradient coil is a movable coil, and the magnetic field generated by the second gradient coil at a conducting portion of the magnet is offset by the magnetic field generated by the first gradient coil. According to this construction, an eddy current that occurs with the time change of the gradient magnetic field can be reduced.

Inspection apparatus using magnetic resonance

A probe for an MRI apparatus in a vertical magnetic field system including: an array coil which is formed by arranging a plurality of unit coils, which can be driven independently of one another, in a direction perpendicularly intersecting a direction of a static magnetic field; and a compensating coil which forms a magnetic field in a direction perpendicularly intersecting both a direction of a magnetic field formed by the array coil and the direction of the magnetic field, a signal detected by the array coil and a signal detected by the compensating coil being composed so as to be in phase with each other, thereby to be outputted.

Multiple-coil adopting a quadrature detection method applied thereto and

In an inspection method which generates a static magnetic field, a gradient magnetic field and a radio frequency magnetic field, detects nuclear magnetic resonance signals from an inspection object, computes and processes the nuclear magnetic resonance signals so detected and outputs the result of computation processing, a gradient magnetic field for generating signal attenuation by diffusion and an oscillating gradient magnetic field for generating chemical shift information and spatial information of the materials contained in the inspection object are applied, separation and acquisition of spatial information of each material contained in the inspection object are simultaneously conducted, and a measurement time is shortened.

Inspection method and inspection apparatus using nuclear magnetic

An MRI RF coil including first and second ring elements having a plurality of peripheral segments connected in ring shape which are apart from each other along a common vertical axial line. The RF coil also includes a plurality of axial conductive segments for connecting the first and second ring elements electrically to each other at the contacts of the plurality of peripheral segments with a plurality of current loops being formed by neighboring axial conductive segments and two peripheral segments connected thereby. Further, at least one control signal feeding point is positioned at any one of the peripheral segments of the first or second ring elements.

Magnetic resonance imaging apparatus and RF coil employed therein

In magnetic resonance imaging, a first echo train is obtained by applying a readout gradient magnetic field to a region of interest to be imaged and periodically inverting the polarity of the readout gradient magnetic field, without applying an encoding gradient magnetic field to the region of interest. A periodic change of phase shift of the first echo train is detected from the first echo train. Information indicating phase shifts of all of the echoes in the first echo train is obtained using the periodic change of phase shift. A second echo train is obtained by applying a readout gradient magnetic field and an encoding magnetic field to the region of interest and periodically inverting the polarity of the readout gradient magnetic field. Phases of echoes in the second echo train are corrected using the information indicating phase shifts of all of the echoes in the first echo train.

Method for reducing artifacts in magnetic resonance imaging

A pipelined A/D converter which minimizes differential non-linearity by preventing mismatching between converting stages. The A/D converter includes a plurality of converting stages connected in a cascade form wherein each of the converting stages includes an ADC unit for converting an analog input into a digital output. The digital outputs from said converting stages form a conversion output. Each preceding converting stage except a last converting stage further includes an amplifier for deriving and amplifying a conversion residue representing a quantization error resulting from the conversion performed by the preceding converting stage based on the digital output outputted by the ADC unit of the preceding converting stage and the analog input inputted to the preceding converting stage. The amplified conversion residue from the preceding converting stage is supplied as an analog input to a succeeding converting stage. A connector is provided for connecting the amplifier of the preceding converting stage to a node in the ADC unit of the succeeding converting stage. The node provides a base voltage to the ADC unit of the succeeding converting stage.

Pipelined analog-to-digital converter

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Akishima, Japan

Etsuji Yamamoto