Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Other

Toshiba Medical Systems Corporation

Yasutsugu Seo

Yasuo Miyajima

Tatsuro Baba

Tetsuya Kawagishi

Takeshi Sato

Yoshitaka Mine

Kazuhiro Iinuma

Ryoichi Kanda

Masafumi Kondo

Motoaki Sugawara

Shigeru Sato

Masaaki Ishiguro

There is provided an ultrasonic wave diagnosis instrument. The ultrasonic wave Doppler diagnosis instrument transmits an ultrasonic continuous wave in a range direction and receives a reflective wave of the ultrasonic continuous wave. The ultrasonic wave Doppler diagnosis instrument includes: a modulation unit that subjects the ultrasonic continuous wave to frequency modulation such that a phase is varied in accordance with the distance of the range direction; a demodulation unit that demodulates the reflective wave for each range of the range direction while interlocking with the frequency modulation, and generates a reception signal in the range in a separated state; and a presentation unit that presents information by using a signal of a Doppler component based on the reception signal.

Ultrasonic doppler diagnosis device

An ultrasound diagnostic apparatus includes first and second probes. The inside of an object to be examined is scanned with a first ultrasound beam through the first probe to acquire first ultrasound image data associated with the object. The inside of the object is scanned with a second ultrasound beam through the second probe to acquire second ultrasound image data associated with the object. The second ultrasound image data is synthesized with the first ultrasound image data on the basis of the position of the first probe relative to the second probe, which is detected by a position detector.

Ultrasound diagnostic apparatus

Where an imaging volume of an object under examination is comprised of eight slices with four regions 'a', 'b', 'c', and 'd' per slice (on the k space), the RF pulse frequency, the slice-selection gradient magnetic field, and the phase-encoding gradient magnetic field are controlled so as to first acquire data for a region 'a' of each of the slices #1 to #8 in sequence and then acquire data for the slices #1 to #8 for each of the regions 'b' to 'd' in sequence. The data with 4 rows and 8 columns thus obtained for each of the regions of the slices is rearranged into data with 8 rows and 4 columns arranged for each of the slices. Data in each row are subjected to two-dimensional Fourier transformation, so that an MR image corresponding to each slice is reconstructed. This permits the RF pulse repetition time TR to be made long even if a time interval between successive data acquisition is made short. Thus, a multi-slice divisional-scanning type magnetic resonance imaging apparatus can be realized, which permits T2 contrast images with high signal-to-noise ratio to be obtained in a short time.

Magnetic resonance imaging apparatus

An input device for specifying a first measuring point near an orifice, for example, at the valve port position of the heart on a color Doppler image and a second measuring point on the centerline of an issuing fluid is connected to a blood flow imaging device which is a color Doppler tomograph constituted by combining a sector electronic scanning type ultrasonic diagnostic device and an Doppler system to derive blood flow information and tomographic image (B mode image) information by using a single ultrasonic probe. The blood flow imaging device derives Doppler shift frequencies at the first and second measuring points and supplies the same to a flow-rate calculating circuit. The flow-rate calculating circuit derives flow velocities of the blood at the first and second measuring points and a distance between the first and second measuring points and calculates the flow-rate based on the derived flow velocities and distance. The blood flow information and tomographic image obtained by the blood flow imaging device and the calculating result of the flow-rate calculating circuit are supplied to a display control circuit via a CPU bus and displayed on an display unit under the control of the display control circuit.

Ultrasonic doppler apparatus

The sequence for a case of scanning by an ultrasound prove having a plurality of transducers, for example, m numbers, is as follows: first scan line.fwdarw.(m-1)th scan line.fwdarw.mth scan line.fwdarw.first scan line.fwdarw.second scan line.fwdarw.mth scan line.fwdarw.first scan line.fwdarw.second scan line.fwdarw.third scan line.fwdarw.first scan line.fwdarw.. . . The ultrasound probe transmits ultrasound beams to a subject and receives echo signals reflected from the subject in accordance with the above sequence. Doppler signals obtained from the echo signals are stored in a memory. When the predetermined number of Doppler signals in each line are stored in the memory, the Doppler signals in each line are read out from the memory. By such scanning sequence, a repeat frequency, i.e., a sampling frequency of Doppler signals of the ultrasound beams transmitted in the same direction, is a shorter. As a result, a low limit of measurable flow velocity is a lower, and a timing for reading out (outputting) the Doppler signals from the memory can be a constant.

Method and system for controlling ultrasound scanning sequence

An ultrasonic imaging apparatus comprises an ultrasonic transducer for emitting ultrasonic pulses at a rate frequency fr and converting an echo wave of the ultrasonic pulses into an echo signal, an orthogonal detector circuit for orthogonally detecting an echo signal provided from the ultrasonic transducer and a calculator circuit for obtaining Doppler data from the orthogonal detection signal and providing color Doppler data. The output of the calculator circuit is coupled to an interpolator circuit. When the interpolator circuit receives color Doppler data at a frequency above +fr/2 or -fr/2 from the calculator circuit, it interpolates the Doppler data according to a predetermined argorithm for excluding interpolation data corresponding to a zero region between +fr/2 and -fr/2. The color Doppler data including interpolation data is displayed as color image on the monitor.

Ultrasonic imaging apparatus

An ultrasound diagnosing system includes an ultrasound transmission/reception section, a cross-sectional imaging section, a phase detection section, a filter section, a calculation section, a correction section and a display section. The cross-sectional imaging section causes the ultrasound transmission/reception section to perform ultrasound scanning for sending and receiving ultrasound beams a plurality of times at an identical beam position, and detects cross-sectional information on a living subject from the echo signals. The phase detection section performs quadrature detection of the echo signals. The filter section eliminates low-frequency clutter components from two sets of detected echo components. The calculating section calculates an average blood flow speed by using the outputs of the filter section by autocorrelation. The correction section substracts the average values of the echo components from the two sets of the echo components before the calculation results are obtained, to eliminate the DC components included in the echo components. The display section superposes two-dimensional information on the average blood flow speed from the calculating section on the cross-sectional image and displays a superposed image.

Ultrasonic diagnosing system

An ultrasonic diagnostic system is disclosed, which comprises an ultrasonic transducer array having plural transducer elements for transmitting an ultrasonic beam and generating echo signals from the echos reflected from an object, a circuit for exciting the transducer elements to generate the ultrasonic beam that propagates along a predetermined scanning line on the object, and a receiver circuit for time delaying and summing the echo signals to produce a summed output signal. In order to obtain velocity information from a moving object, the equipment further comprises a phase detecting circuit for selecting a Doppler shift signal from the summed output signal to produce a phase detected signal, a digital filter circuit for removing the phase detected signal component reflected from objects moving at lower speed than a predetermined speed from the Doppler shift signal, a circuit for envelope detecting the output signal from the digital filter circuit, a circuit for brightness modulating the amplitude of the output signal from the envelope detecting circuit, and a display unit for displaying the output signal from the brightness modulating circuit as a function of time in real time.

Ultrasonic diagnostic equipment

An ultrasonic Doppler blood flow sensing apparatus comprises a probe for sending an ultrasonic wave into a living body and receiving echoes, an ultrasonic diagnosing device for processing the echoes received to provide a tomogram signal, an ultrasonic Doppler blood flow meter for processing the echoes received to provide blood flow data, an electrocardiographic circuit, a gate for producing a sampling signal in response to an electrocardiographic signal from the electrocardiograph circuit, a random access memory for sampling and storing blood flow data sensed by the blood flow meter in response to the sampling signal from the gate, detectors for detecting a radius r of a blood vessel and a cosine of .theta., where .theta. is an angle of direction of an ultrasonic beam with respect to a direction of blood flow at a part of the living body to be measured on the basis of the tomogram data derived from the diagnosing device, an arithmetic logic unit for calculating an average blood flow during a most recent one minute or for one or several most recent cardiac cycles on the basis of the sampled blood flow data stored in the RAM, the detected cos .theta. from the cosine detector and the radius r of the blood vessel from the r detector, and a monitor for displaying a tomogram defined by the tomogram data from the diagnosing device and an average blood flow from the arithmetic logic unit.

Ultrasonic blood flow sensing apparatus

An ultrasonic blood flow measuring apparatus comprising:

Growing community of inventors

Ootawara, Japan

Yasutsugu Seo