摘要:
In an apparatus for ultrasonic diagnosis, an autocorrelation calculator 11 produces Doppler power data P, a shading portion extractor 21 extracts the left-side section of the profile of the ultrasonic image from the Doppler power data P, and a data value converter 22 converts the data value of the extracted shading portion into the data value for shading and converts the data values of remaining portions into a data value different from the data value for shading. The shaded ultrasonic image is visualized as a three-dimensional image so as to facilitate the diagnosis. Particularly, in ultrasonic images of Doppler power mode, blood vessels are visualized as three-dimensional images, and the viewer can identify even small blood vessels accurately.
摘要:
A method and system for making visible a flow of blood in a living body. The method comprises the steps of obtaining blood flow vector distribution maps by a recpetion of waves reflected from a living body to which ultrasonic pulses are radiated, and by a Doppler analysis of the reflected waves, arranging dummy blood corpuscle in domains in which the blood flow vector distribution maps are expressed, calculating flow velocity vector of the dummy blood corpuscle for each dummy blood corpuscle from the blood flow vector distribution maps, forming a plurality of images in which the dummy blood corpuscles are sequentially moved in response to the flow velocity vectors, and sequentially displaying the plurality of the images on a display. Also, the density of the arrangement of the dummy blood corpuscles, for example, corresponds to the blood pressure.
摘要:
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 by the blood flowmeter. The speed of flowing blood is measured by cross correlation time-difference detection, and the detection is performed by using sample and hold voltages obtained from echo signals reflected from the flowing blood which is passing across the two sample volumes. To the blood flowmeter, two quadrature detection circuits are applied for selecting echo signals reflected by the flowing blood from echo signals reflected by whole substances located along the two sound-beams by eliminating echo signals reflected by fixed substances located along the two sound-beams, and two range gate circuits are applied to each quadrature detection circuit for extending a range of each sound volume for measuring the speed of the flowing blood which passes across the two sample volumes not only perpendicularly but also aslant to a center line made by the directions of the two sound-beams.
摘要:
An ultrasonic transducer driving circuit configured to supply an output current and/or an output voltage to an output line for driving an ultrasonic transducer is provided. The ultrasonic transducer driving circuit includes a first current discharge circuit configured to allow a current arising from electric charges accumulated in the ultrasonic transducer to flow from the output line to ground when the output line is at a positive voltage, and a second current discharge circuit configured to allow the current arising from the electric charges accumulated in the ultrasonic transducer to flow from ground to the output line when the output line is at a negative voltage. The first current discharge circuit and the second current discharge circuit are controlled based on the output current and/or the output voltage.
摘要:
A receiving circuit in an ultrasonic probe that includes an ultrasonic transducer configured to receive ultrasonic waves is provided. The receiving unit includes an amplification unit configured to amplify an echo signal received at the ultrasonic transducer. The amplification unit includes a current output amplifier. The receiving circuit further includes a delay unit configured to provide a delay time to output signals of the amplification unit.
摘要:
The transmitter/receiver for a convex probe and linear probe are used to drive a sector probe. Usually, when an ultrasound diagnostic apparatus using a convex probe and linear probe uses a sector probe, it selects vibration elements of N in number, which is equal to the number of channels of the sector probe, out of vibration elements of L in number (N is smaller than L), so that the selected elements are distributed at a virtually constant pitch in the alignment of vibration elements, and turns on only high voltage switches which are connected with the selected vibration elements to implement the sector scanning with the transmitter/receiver. It becomes possible to implement the sector scanning by using the transmitter/receiver having channels less than the number of vibration elements of the sector probe.
摘要:
An ultrasonic imaging apparatus includes a plurality of transmission/reception units each having a probe connector, a transmission/reception section, and a power supply, a plurality of display units each having an image display section and a power supply, a plurality of operation units each having an operation section and a power supply, a single control unit, and a communication means for communicably connecting said control unit to said transmission/reception units, said display units, and said operation units. The control unit has a unit control means for individually controlling said plurality of transmission/reception units, said plurality of display units, and said plurality of operation units, all of which are connected to said control unit, and a software management section for managing enable/disable of softwares for respectively controlling said plurality of display units and said plurality of operation units.
摘要:
An ultrasonic diagnostic apparatus includes: an ultrasonic probe in which a first temperature sensor and a second temperature sensor are located posterior to an oscillator; and a surface temperature calculation device for calculating a surface temperature of the ultrasonic probe on the basis of a first detection temperature Ta detected by the first temperature sensor and a second detection temperature Tb detected by the second temperature sensor. Also, an ultrasonic diagnostic apparatus includes: an ultrasonic probe in which a first temperature sensor and a second temperature sensor are embedded in a backing material; and a surface temperature calculation device for calculating a surface temperature Ts of the ultrasonic probe on the basis of a first detection temperature Ta detected by the first temperature sensor and a second detection temperature Tb detected by the second temperature sensor.
摘要:
With the aim of quickly returning the voltage of an output line to an ultrasonic transducer from a positive voltage or a negative voltage to the ground voltage and reducing the circuit size, immediately after turning on and turning off of a positive FET in accordance with a positive pulse signal, a negative FET goes on for only a pull-back period allowing for the output line to return to the ground voltage. Also, immediately after turning on and turning off of the negative FET in accordance with a negative pulse signal, the positive FET goes on for only a pull-back period allowing for the output line to return to the ground voltage.
摘要:
An object of the present invention is to provide a battery-driven ultrasound diagnostic apparatus in which the power consumption required for lighting keys little affects an operation time. An ultrasound diagnostic apparatus with lit operation keys comprises a power supply unit that switches power to be supplied to the components of the apparatus between power fed from a battery and power fed from the mains, and a lighting adjustor that ceases or minimizes lighting of operation keys when a detected ambient brightness level exceeds a predetermined threshold.