Abstract: In the present telecommunication system, a wired network receives a plurality of voice signals and transmits them. A first communication device is connected to the wired network. The first communication device includes means for receiving the plurality of voice signals, a first storage means for storing the plurality of voice signals, a first playback means for retrieving a portion of the stored plurality of voice signals, and a first control means for controlling the first playback means to transmit the retrieved portion of voice signals. The portion of the stored plurality of voice signals which are retrieved are then placed onto a wireless network which is in communication with a plurality of portable units. Each of the portable units has capability of communicating with the wireless network for receiving the voice signals therefrom, for storing a received voice signal, and for playing back the stored voice signal.

Abstract: A magnetic recording/reproducing apparatus for reproducing data recorded on a recording medium based on the signal read by a head contains a filter circuit which restricts the frequency range of the read signal and allows the low frequency read signal to pass through it, a full wave rectification circuit for full wave rectification of the read signal output from this filter circuit and an integrating circuit for generating a threshold signal of the read signal output from the filter circuit based on the integrated value obtained by integrating the output signal from the full wave rectification circuit when reproducing data and for holding the integrated value at the time of the immediately before data reproduction during the operation other than the data reproducing operation.

Abstract: A generation of magnetic fields for a nuclear magnetic resonance imaging capable of preventing the occurrence of the cross-talk between coils for generating the magnetic fields easily. A coil system having a plurality of channels for generating magnetic fields is provided, and currents to drive the coil system is supplied from a power source. A controller generates the control signals indicating desired currents to be supplied from the power source to the coil system in an absence of cross-talks among the channels of the coil system, and then the cross-talks among the channels of the coil system are compensated by supplying the power source with cross-talk compensated control signals for controlling the currents to be supplied from the the power source to the coil system, where the cross-talk compensated control signals are obtained by adding the control signals with cross-talk compensation components derived according to predetermined cross-talk characteristics of the channels of the coil system.

Abstract: A modularly configured networked document processing system has a plurality of computers communicating over a local area network. The system has fax servers and scanners to convert documents into image signals, work stations to recognize character signals from the image signals, to process the character signals, and to display the unintelligible processed character signals for user intervention. In addition, the system has a gateway for communication to a mainframe computer.

Abstract: A method and an apparatus for heart beat synchronous nuclear magnetic resonance imaging capable of improving the quality of the nuclear magnetic resonance images synchronous with the heart beat by reducing erroneous generation of synchronization signals due to noises in the electro-cardiographic waves. In the apparatus, noises are removed from the electro-cardiographic waves obtained from the patient; synchronization signals are generated in correspondence to the noise removed electro-cardiographic waves; and nuclear magnetic resonance images are taken by collecting nuclear magnetic resonance signals from the patient at collection timings determined in correspondence to the synchronization signals, and by reconstructing the nuclear magnetic resonance images by using the collected nuclear magnetic resonance signals.

Abstract: In magnetic resonance imaging, prepared first is a three-dimensional image data consisting of a plurality of tomographic image data of a diagnostic portion of an object being examined. Then, data of a pilot image in the three-dimensional image data are designated, and the pilot image is displayed. Then, a linear ROI (region of interest) is placed on the displayed pilot image. Then, image data of a cross-section are edited from the three-dimensional image data, the cross-section passing through the linear ROI in a space of the three-dimensional image data. On the basis of the edited image data of the cross-section, a prediction image for scan is displayed.

Abstract: In an method of collecting image data in magnetic resonance imaging, a sequential order for collecting image data of the plurality of sliced planes including a most clinically important sliced plane is decided by a sequential order decision unit. Synchronizing information related to at least one sliced plane of the plurality of sliced planes is decided by a synchronizing information decision unit. At least two sliced planes includes the most clinically important sliced plane, and are synchronized with at least one different reference pulse for collecting the image data. The image data of the plurality of sliced planes are collected by an image data collection step at every repetition time by selectively exciting each of the plurality of sliced planes on the basis of the synchronizing information and the sequential order.

Abstract: A control circuit for controlling the power or bounce of an output driver circuit is disclosed. The control circuit can sense the output voltage and/or the bounce and then adjust the control node voltage of the output driver circuit accordingly. In addition, the output circuit can discharge the output node to a lower voltage level before turning on the output driver circuit.

Abstract: A magnetic resonance imaging apparatus is provided which generates a plurality of echoes by applying a 90.degree. RF pulse for magnetically exciting spins and subsequently repetitively applying a 180.degree. RF pulse for inverting the phase of the magnetized spin. In this apparatus, a pulse sequence is so performed as to enable any specific interval, out of an interval from the application of a 90.degree. RF pulse until a first echo is obtained and intervals each-between sequential adjacent two echoes, to be made to correspond to a 3 or more odd multiple of any other intervals.

Abstract: A method of scanning in magnetic resonance imaging is disclosed. In the method, a desired diagnostic portion of an object is diagnosed, and then two different slicing planes according to the designated diagnostic portion are selected. Then, magnetic resonance signals from the selected two slicing planes are collected, and scanning ranges in the slicing planes individually decided using the collected magnetic resonance signals. Then the diagnostic portion in accordance with the designated scanning ranges is scanned for diagnosis.

Abstract: A solid state peripheral storage device receives an LSN address from a computer system and provides a mapping to a PSN data. The PSN data addresses memory units which are made out of solid state floating gate storage cells. In addition, a microsequencer controls the operation of the translation of the mapping of the LSN to PSN. Through the use of the mapping of LSN to PSN, defective sectors in the memory units can be mapped out and fresh, unused, defective-free sectors can then be replaced, all automatically, without user intervention. Finally, the microsequencer has error recovery routines to further enhance the reliability of the peripheral device.

Abstract: A digital wireless communication system operates between a first unit and a second unit. The received digitally encoded signal is sampled to produce a first sampled digital signal. A first bank of match filters with each match filter having a different frequency range is used to pass the first sampled digital signal therethrough. The output of the first bank of match filters having the largest amplitude is selected along with the match filter which produced the largest amplitude output. The digitally encoded signal having this "coarse" frequency range is then passed through a second bank of match filters. Each of the match filters has a fine frequency different from one another. The output of the second bank of match filters is produced and the output having the largest amplitude is selected. In addition, the filter producing the largest amplitude from the second bank of match filters is also selected.

Abstract: A magnetic resonance diagnosis apparatus having a diagnosis mat by which the position of the surface coil is accurately confirmed. The magnetic resonance imaging diagnosis apparatus includes a gantry for enclosing a biological body so as to provide an imaging area; a mat portion having a slot therein in a lateral side thereof wherein the mat portion is provided above a tabletop that is movable into and out of the gantry; and surface coil for applying electromagnetic waves to the biological body, and which is slidably inserted to the slot of the mat portion so that a position of the coil means is accurately indexed and observed.

Abstract: A dual technology intrusion detection device has a microwave detection sub-system, employing a bent mono-pole as an antenna to generate a symmetrical conically shaped volume of protection. The intrusion detection system also has a passive infrared intrusion detection sub-system, employing a hemispherically shaped fresnel lens having a plurality of lens segments, to detect infrared radiation from a plurality of spaced apart fields of view in a right symmetrical cone. The volume of protection for the infrared intrusion detector and microwave detector substantially coincide. In addition, the microwave detection sub-system employs a single bipolar transistor and a variable trim capacitor to generate the microwave energy and also uses the single bipolar transistor in an autodyne mode to mix the received microwave radiation.

Abstract: An MRI automatic power control system comprises a first unit for exciting each of a plurality of regions of a subject under examination with an excitation radio-frequency pulse of a different power, a second unit for acquiring magnetic resonance signals from the plurality of regions excited by the first unit, a third unit for identifying a maximum magnetic resonance signal contained in the magnetic resonance signals acquired by the second unit from the plurality of regions of the subject, and a fourth unit for storing the power of an excitation radio-frequency pulse that has provided the maximum magnetic resonance signal identified by the third unit as the optimum power of the excitation radio-frequency pulses.

Abstract: A digital receiver for receiving an RF signal has a conventional RF to intermediate frequency (IF) converter. The IF signal, however, is amplified with a limit on its amplitude. In addition, a Receive Signal Strength Intensity (RSSI) signal is generated. The RSSI signal contains the envelope information of the modulated IF signal. The IF amplitude limited signal containing phase information, is then digitized and a complex baseband signal is produced. The complex baseband signal is then combined with the RSSI signal to restore the amplitude information of the modulated IF signal in the complex baseband signal. The restored complex baseband signal can be equalized with a conventional equalizer to remove intersymbol interference. A conventional symbol detector detects the symbol in this signal stream.

Abstract: The MR imaging apparatus is provided with a cable handling unit for handling an RF cable, which comprises a slack-preventing mechanism for winding the RF cable and feeding the RF cable according to a motion of a cradle, a cable guide mechanism for guiding the RF cable and a twist-preventing mechanism for preventing a twist of the RF cable. The slack-preventing mechanism comprises a reel for winding the RF cable and feeding the RF cable and a tension-imparting mechanism for imparting a tension to the RF cable. The cable guide mechanism comprises a stationary guide provided in the gantry and a moving guide having one end linked to the stationary guide slidably and another end linked to the cradle rotatably.

Abstract: An electrically programmable and erasable floating gate memory device has two substantially identical sections. Each section has a plurality of column address lines, a plurality of row lines and a plurality of source lines. A first plurality of floating gate memory cells has its drain connected to a different one of the column address line, its gate connected to the same first row line and its source connected to the same first source line. A second plurality of floating gate memory cells has its drain connected to a different one of the column address line, its gate connected to the same second row line, different from the first row line, and its source connected to the same first source line. Associated with each section is a plurality of bit latches, one for each column. Reprogramming data is stored in the bit latches. Data from the bit latches of one section are stored in the first plurality of floating gate memory cells.

Abstract: A pair of 8-shaped coils vertically sandwiches an object to be examined for providing a magnetic field in the horizontal direction perpendicular to the body axis in the object. A pair of rectangular coils also vertically sandwiches the object for providing a magnetic field in the vertical direction in the object. The pair of 8-shaped coils is connected for detecting a first magnetic resonance signal from the object and the pair of rectangular coils is connected for detecting a second magnetic resonance signal from the object. A phase of one of an output of the pair of 8-shaped coils and an output of the pair of rectangular coils is shifted by 90.degree. and summing a shifted output and the other output. An upper coil assembly of the 8-shaped coil pair and the rectangular coil pair is connected to a lower coil assembly at one end thereof in the lateral direction of the object and is pivotal to be freely opened and closed.