Abstract: An ultrasonic imaging apparatus and method combines dynamically focused reception and coded transmission/reception technologies by inexpensive circuitry. A receive aperture is divided into smaller apertures. Correspondingly, a receive beam former is divided into receive sub-beam formers 36a to 36n by which a phase alignment and summing process is performed. Thereafter, coded signals are compressed in decoders 37a to 37n in a time axis direction. Output signals from the decoders are once again subjected to a phase alignment and summing process in a second beam former.

Abstract: An ultrasonic probe that does not impart an influence to an MRI image even when inside an MRI gantry, and an ultrasonic imaging method. Ferromagnetic impurity contained in the ultrasonic probe is 3×10−7 mol cm3 or less, and there is provided a leakage electromagnetic wave freeze means 31 which enables a digital control unit of an ultrasonic imaging apparatus to be disconnected from a signal wire and ground wire of a probe.

Abstract: An ultrasound therapy apparatus delivers focused ultrasound for therapeutical purposes which can be correctly targeted to a target region, and also, a positional shift from the target region under irradiation of ultrasound can be effectively avoided. An ultrasound transducer is inside an applicator with an imaging ultrasonic probe. Another ultrasound transducer monitors a position of a target and a positional shift is inside a catheter which is inserted into a urethral tube. An imaging system drives the ultrasound probe to display an ultrasound tomographic image of a region in the vicinity of a target region. The ultrasound transducer is driven in a pulse-shaped mode at the same frequency as the imaging ultrasound and also at such timing when the imaging ultrasound is reached. As a result, a point-shaped sound source image is superimposed and displayed on an ultrasound tomographic image.

Abstract: Disclosed is a system for detecting whether a tissue of in the vicinity of a focal point region reaches a temperature at which the tissue is altered thermally in an ultrasound thermal coagulation therapy, and for securing an effect of the therapy. The system includes: irradiating means for irradiating an ultrasound for ultrasound therapy; a signal detection unit for detecting bubble generation in a region to be treated; and a control circuit for controlling a continuous insonation time of a therapeutic ultrasound upon receiving information from the signal detection unit.

Abstract: An apparatus for making paper includes a stirring tank and a paper making portion. The stirring tank includes: an outer cylinder; a middle cylinder disposed concentrically with the outer cylinder; a raw-material feeding port for feeding raw-material into said stirring tank; a stirring mechanisms; and a top plate for holding the outer and middle cylinders in a predetermined position. The paper making portion is installed below the stirring tank and includes: a wire cloth and a paper making frame having an opening for holding said wire cloth, and the opening is connected to a suction unit. The stirring mechanisms are uniformly disposed above the wire cloth. In addition, a plurality of raw-material feeding ports are uniformly disposed above the wire cloth.

Abstract: Filter coefficients of matched filters are set equivalent to those of a circuit for multiplying spread spectrum code signals of different frequencies, and a correlation value between each of the spread spectrum code signals and spread spectrum signal data. Such correlation values are averaged by their corresponding square circuits and adders. In a maximum-value selection circuit, the averaged correlation values are monitored for a plurality of samples, thus obtaining both an amount of correction of frequency deviation of carrier wave from the frequency of a pass having the largest one of the correlation values (the most matching frequency) and an amount of phase correction of the spread spectrum signal from positional information (phase information) of a sample of the pass having the largest correlation value.

Abstract: An object of the present invention is to offer a component suction head for electronic component mounting machines which is capable of securely holding electronic components by suction and smoothly mounting them on printed wiring boards without dislocation. To achieve the objective, the component suction head of the present invention comprises the following. A suction nozzle unit 24 has a suction face 33 at the center of its tip, for holding electronic component 10, and a through hole 27 formed at its center which leads to the suction face 33. The back end of the through hole 27 is connected to a vacuum generator. An elastic ring 32 is fitted and fixed around the through hole 27 to the tip of the suction nozzle unit 24, slightly protruding from the suction face 33. An ejector pin 28, which can protrude from the suction face 33 for a specified length, forms an intake passage 38 from the tip to the through hole 27, and is fitted to the through hole 27 in sliding fashion.

Abstract: An image display apparatus having a computer system and an image processor. The computer system includes: a personal computer having a CPU and a main memory; and input/output apparatuses such as magneto-optical disk drive, image scanner, full color printer, etc. The image processor which commonly uses a system bus of the computer system includes an independent dedicated image bus, a compression/expansion unit, an image memory read/write controller, image memories, and a video processor. Image data which is sent from the magneto-optical disk drive is decoded by the compression/expansion unit and is held in the image memories. The image data of the image memories is transferred to the video processor through a dedicated signal line and is displayed on a large screen projection display.

Abstract: An image display apparatus having a computer system and an image processor. The computer system includes: a personal computer having a CPU and a main memory; and input/output apparatuses such as magneto-optical disk drive, image scanner, full color printer, etc. The image processor which commonly uses a system bus of the computer system includes an independent dedicated image bus, a compression/expansion unit, an image memory read/write controller, image memories, and a video processor. Image data which is sent from the magneto-optical disk drive is decoded by the compression/expansion unit and is held in the image memories. The image data of the image memories is transferred to the video processor through a dedicated signal line and is displayed on a large screen projection display.

Abstract: An image forming apparatus to prevent that the reception operation is interrupted. The image forming apparatus having a cassette for storing sheets, detecting member for detecting the quantity of sheets in the cassette, recording portion for recording images on a sheet, and controler for prohibiting the recording image by the recording portion when the detecting member detects a quantity of sheets that is less than a predetermined quantity.

Abstract: For the purpose of detecting a geometric distortion of an image on a screen of a CRT display device, i.e., the deviation of the positional coordinates at a high speed and with a high accuracy, the positions of window images having about 10 rows and 10 columns which are arranged in a matrix on the screen of the display device, including a screen frame, are photographed through a predetermined low-pass filter by a monochromatic CCD camera, and further, both the low-light field picture and the high-light field picture are photographed, whereby the positions of the window images can be detected with a high accuracy within 0.1 CCD pixel by the elimination of a dark current, the normalization of detection sensitivity and the interpolation calculation. Therefore, the detection of the geometric distortion can be performed at a high speed and with a high accuracy by an inexpensive monochromatic CCD camera which has the number of pixels less than the total number of pixels of the display device.

Abstract: A digital convergence correction circuit for a CRT display unit deals with the problem of an excessive calculation time of the microprocessor expended for the vertical interpolation by using at least two pieces of ROM (read only memory) devices connected together. The circuit deals with the problem of a step variation of brightness by employment of a novel slope interpolation means which implements interpolation based on a continuous waveform of the first-order differential coefficient at the lattice points of the display screen and a curve interpolation means which forms a more superior convergence system. The circuit uses a blanking means to prevent abnormal states from appearing on the display screen during the transfer period of the digital convergence correction data of a new format at the switching of the scanning format for a video signal to be displayed.

Abstract: An apparatus for controlling toner concentration utilizing a hollow body upon which a detecting coil is wound. The hollow body responses to the inductance of the developer passing through. The apparatus further comprises: a first digital oscillator with the frequency thereof being variable according to changes in the inductance, a second digital oscillator producing a reference signal at predetermined frequency, and a first and second digital frequency dividers for dividing the outputs of the first and second oscillators, respectively. The fist and second dividers are cleared by the divided output of the other divider. A toner supply mechanism is energized when the first frequency divider is cleared and is de-energized when the second frequency divider is cleared.

Abstract: A toner concentration control device comprising a toner supply mechanism for supplying toner to a developing device, conveying means for conveying the developer, detecting means for optically detecting an amount of the toner adhering to a conveying surface of the conveying means and a control mechanism for controlling the toner supply mechanism based on the detected amount of toner. Thus, an amount of fresh toner corresponding to an amount of toner spent by development is supplied from the toner mechanism to a developer in the developing device to maintain a constant toner concentration in the developer.