JP3151463B2 - Ultrasound diagnostic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus, and more particularly to an ultrasonic diagnostic apparatus capable of continuously monitoring changes in pulse waves, blood pressure, and the like.

[0002]

2. Description of the Related Art Japanese Patent Application Publication No. 9-506024 discloses an apparatus for continuously measuring physiological parameters such as blood pressure. As shown in FIG. 8, this device is arranged on a patient's blood vessel, and an exciter 802 for guiding a signal waveform into the patient's body, and a signal waveform on the same blood vessel to which a blood pressure waveform is added. A non-invasive sensor 803 for detecting the blood pressure, a calibration means 801 for obtaining a calibration signal for calibrating the blood pressure of the patient,
It comprises an exciter 802, a non-invasive sensor 803, and a monitor 804 incorporating a processor for processing signals from the calibration means 801.

In this device, a waveform is guided into a subject from an exciter 802, and a waveform signal to which a change due to a physiological parameter is added is detected by a non-invasive sensor 803, and these signals are monitored by a monitor including a processor. Captured in 804. The monitor 804 detects only the physiological parameter from the detected waveform signal, performs calibration using the signal of the calibration unit 801, and displays the measured value of the physiological parameter and its temporal change.

[0004]

However, in this conventional apparatus, since the exciter and the non-invasive sensor need to be installed at separate positions on the same blood vessel, the same blood vessel must be searched for. In addition, attention must be paid to selecting a blood vessel on the body surface so that the blood vessel to be observed is not confused with information from another blood vessel. For this reason, it is difficult to correctly install the exciter and the non-invasive sensor on the subject, and there are problems that the installation position is restricted.

[0005] In addition, the detected value is greatly affected by the installation position of the exciter or the non-invasive sensor, the installation distance between them, or the characteristics of each subject, and if it is difficult to obtain a highly accurate detection result. There is a problem to say.

[0006] The present invention is to solve such a conventional problem, and it is possible to continuously measure a pulse wave without being affected by characteristics of individual subjects or measurement sites.
Using the measurement results of this pulse wave, continuously changes in physiological parameters such as blood pressure value, vascular resistance, and vasoconstriction intensity,
It is another object of the present invention to provide an ultrasonic diagnostic apparatus capable of monitoring without imposing a burden on a patient (that is, non-invasively).

[0007]

Therefore, the ultrasonic diagnostic apparatus of the present invention is provided with a two-dimensional Doppler calculator for calculating a continuous change in the area of a blood vessel from information on reflected ultrasonic waves from a subject. .

[0008] A two-dimensional Doppler based on a relationship between a measuring device for discontinuously measuring a physiological parameter of a subject and a physiological parameter measured by the measuring device. A calibrator for converting the blood vessel area calculated by the calculator into a physiological parameter is provided, and the physiological parameter converted by the calibrator is continuously displayed on the monitor.

The two-dimensional Doppler calculator can continuously and non-invasively measure a change in the area of a blood vessel at an arbitrary site, that is, a change in the magnitude of a pulse wave. In addition, by providing a measuring device for measuring a physiological parameter and a calibrator, a change in the area of a blood vessel determined by a two-dimensional Doppler calculator can be converted into a continuous change in a physiological parameter. Parameters can be measured continuously and non-invasively.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, there is provided an ultrasonic sensor for irradiating an ultrasonic wave to an object and converting reflected ultrasonic waves from the object into an electric signal, and a monitor of a display means. In the ultrasonic diagnostic apparatus having
MTI for removing fixed components and low-frequency components from signals
The speed is determined from the output signal of the filter and the MTI filter.
One and a frequency analyzer for detecting components, reflected from the ultrasound results information and two-dimensional Doppler calculator for calculating a continuous change in the area of the vessel, the non-continuously measuring the physiological parameters of a subject And a calibration for converting the blood vessel area calculated by the two-dimensional Doppler calculator into a physiological parameter based on a predetermined relationship between the blood vessel area and the physiological parameter measured by the measuring instrument. and the vessel is provided, before
The two-dimensional Doppler arithmetic unit uses digital
The presence or absence of blood flow components at the sampling point is determined, and the
Count the cumulative value of a certain sampling point to obtain the area of the blood vessel
For this reason, the physiological parameters converted by the calibrator are continuously displayed on the monitor. And it can be monitored non-invasively and continuously measure physiological parameters.

[0011]

According to a second aspect of the present invention, the two-dimensional Doppler calculator determines the presence or absence of a blood flow component at each sampling point in consideration of the presence or absence of a blood flow component at surrounding sampling points. The area of a blood vessel can be calculated with high accuracy.

According to a third aspect of the present invention, a tomographic image of a blood vessel of a subject is displayed on a monitor, and an inspector visually confirms a position and a tomographic image of a blood vessel to be monitored. be able to.

According to a fourth aspect of the present invention, a tomographic image of a blood vessel of the subject and a sampling point determined to have a blood flow component by the two-dimensional Doppler calculator are displayed on the monitor in a superimposed manner. The examiner can visually confirm the position and the orientation of the ultrasonic sensor with respect to the subject.

According to a fifth aspect of the present invention, a blood vessel displayed on a monitor screen is specified, and a two-dimensional Doppler calculator can specify a blood vessel for calculating a continuous change in area. If there are a plurality of blood vessels on the monitor screen, the blood vessels to be monitored can be specified, and the accuracy of the area calculation can be increased by reducing the monitored area.

[0016]

According to a sixth aspect of the present invention, a blood pressure value is measured as a physiological parameter by a measuring device, and the blood pressure value can be continuously monitored non-invasively.

[0018]

According to a seventh aspect of the present invention, the measuring device automatically measures a physiological parameter at an arbitrary time interval, and the calibrator uses the measurement result based on the measurement result every time the measuring device performs the measurement. Thus, the physiological parameters converted from the area of the blood vessel are calibrated, and the measurement and calibration of the physiological parameters can be performed periodically at arbitrary time intervals.

[0020] The invention according to claim 8, instrument measures the physiological parameter at an arbitrary timing, calibrator is, each time is carried out measured by the measuring instrument, on the basis of the result of the measurement, the vessel The physiological parameters converted from the area are calibrated, and the inspector can measure and calibrate the physiological parameters at an arbitrary timing.

[0021]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) The ultrasonic diagnostic apparatus of the first embodiment continuously monitors a change in blood pressure value.

This apparatus, as shown in FIG.
Ultrasonic sensor 11 that transmits ultrasonic waves to the receiver and receives reflected waves
An ultrasonic transmitter 12 that generates an ultrasonic signal and supplies the ultrasonic signal to the ultrasonic sensor 11; a two-dimensional Doppler calculator 13 that calculates an area of a blood vessel based on a reflected wave of the ultrasonic wave; Measuring device 14, which constitutes the measuring device 14, the compression device 141 and blood pressure measuring device 142 for compressing the blood vessel, from the measured value by the measuring device 14 and the area of the blood vessel calculated by the two-dimensional Doppler calculator 13 A calibrator 15 that determines in advance the relationship between the blood vessel area and the blood pressure value and converts the blood vessel area obtained by the two-dimensional Doppler calculator 13 into a continuous blood pressure value based on this relationship; And a monitor 16 for periodically displaying a waveform.

In FIG. 1, the ultrasonic sensor 11 is fixed to the lower arm of the subject 10, and the compression device 141 of the measuring instrument 14 is fixed to the upper arm.

The ultrasonic signal generated by the ultrasonic transmitter 12 is applied to the subject 10 via the ultrasonic sensor 11. The ultrasonic signal reflected from the subject 10 is converted into an electric signal by the ultrasonic sensor 11 and supplied to the two-dimensional Doppler calculator 13. The two-dimensional Doppler calculator 13 calculates the area of the blood vessel based on the information provided by the reflected wave of the ultrasonic wave, and supplies the calculated area to the calibrator 15.

The measuring device 14 compresses the upper arm of the subject with the compression device 141, measures the blood pressure value by the cuff method with the blood pressure measuring device 142, and supplies the measurement result to the calibrator 15.

The calibrator 15 stores in advance the relationship between the area of the blood vessel obtained by the two-dimensional Doppler calculator 13 and the blood pressure value obtained by the blood pressure measuring device 142, and stores the relationship between the two-dimensional Doppler calculator 13 and the blood vessel. Given the area of continuously, based on this relationship,
The blood vessel area is converted into a blood pressure value and output to the monitor 16. In response to this, the monitor 16 continuously displays the blood pressure value in a waveform.

The measuring device 14 automatically measures the blood pressure value at regular time intervals. When the measuring device 14 measures the blood pressure value, the calibrator 15 uses the measured value as a reference value to calibrate the blood pressure value obtained from the area of the blood vessel. In addition, at any time, the inspector
The measurement at 14 can also be instructed. Also in this case, the calibrator 15 uses the measured value as a reference value to calibrate the blood pressure value obtained from the area of the blood vessel.

Although the blood pressure value measured by the blood pressure measuring device 142 is a discontinuous value, the blood pressure area can be continuously obtained by the two-dimensional Doppler calculator 13, and therefore, the continuous blood pressure value is monitored by the monitor 16. Can be displayed.

Next, the configuration of the two-dimensional Doppler calculator 13 will be described.

First, the outline of the two-dimensional Doppler method in the ultrasonic diagnostic apparatus will be described. In an ultrasonic diagnostic apparatus, blood flow is determined using the Doppler effect in which the frequency of sound shifts with the movement of a sound source or an observer. That is, when a frequency shift occurs in the ultrasonic signal reflected in the subject, it is determined that there is a blood cell which is a reflector moving in the subject, and the magnitude of the frequency shift of the reflected sound is determined. , The presence or absence of a blood flow component, blood flow speed information, and the like are obtained.

In the two-dimensional Doppler method in the ultrasonic diagnostic apparatus, the same part, that is, the same acoustic line is irradiated with an ultrasonic signal a plurality of times, and the change of the blood cell on the same acoustic line is calculated from the change of the reflected signal obtained for each irradiation. Is detected and the same is repeated with a plurality of acoustic lines, thereby obtaining two-dimensionally the presence / absence of a blood flow component, blood flow continuous information, and the like.

FIG. 2 is a block diagram showing the configuration of the two-dimensional Doppler operation unit 13 together with the configuration of the transmitter 12. The transmitter 12 includes an oscillator 123 that oscillates an electric signal serving as an ultrasonic signal, and an ultrasonic delay circuit 122 that delays the electric signal to control the irradiation direction, scanning, and focus of the ultrasonic signal.
And a driver 121 for amplifying the signal, and the two-dimensional Doppler computing unit 13 includes a preamplifier 131 for amplifying an electric signal obtained by converting a reflected ultrasonic signal, and a receiving direction of the reflected ultrasonic signal, A delay circuit 132 and an adder 133 for delaying and adding an electric signal input to control scanning and focus, and a mixer 134 for multiplying an output signal of the adder 133 by a reference frequency signal output from the oscillator 123. When,
A low-pass filter 135 for removing unnecessary high-frequency components from an output of the mixer 134, an A / D converter 136 for converting an output of the low-pass filter 135 into a digital signal, and an A / D converter 136.
MTI filter 137 that removes low-frequency components such as fixed components and body movements from the output of the filter, and a frequency analyzer that detects components having velocities at digital sampling points on each acoustic line
138, and a calculator 139 for calculating the area of the blood vessel from the amount of sampling points having blood flow components.

The signal generated by the oscillator 123 of the transmitter 12 is delayed by a delay circuit 122 in order to control the irradiation direction, scanning, and focus of the ultrasonic signal on the subject 10,
The signal is sent to the ultrasonic sensor 11 via the driver 121, converted into an ultrasonic signal, and emitted to the subject 10.

The subject 10 is repeatedly irradiated with this ultrasonic signal. An ultrasonic signal reflected from the subject 10 for each irradiation is converted into an electric signal by the same ultrasonic sensor 11, and the preamplifier 131 of the two-dimensional Doppler operation unit 13, the delay circuit 1
32, is supplied to the mixer 134 via the adder 133. The delay circuit 132 and the adder 133 control the receiving direction, scanning, and focus of the ultrasonic signal reflected from the subject 10.

The mixer 134 multiplies the output signal of the adder 133 by the signal of the reference frequency f0 output from the oscillator 123 to obtain the Doppler shift frequency component fd and the high frequency component 2f0 + fd.
Is output. The low-pass filter 135 removes the high-frequency components therein and outputs a Doppler shift frequency component fd. This fd is converted into digital data by the A / D converter 136.

The fd converted to digital data is subjected to the MTI filter 137 as a digital filter to remove low-frequency components such as fixed components and body movements. Frequency analyzer
At 138, the component 2b of the digital sampling point on each acoustic line, that is, the presence / absence of blood flow, blood flow velocity, direction of blood flow, and the like are detected and supplied to the calculator 139.

The calculator 139 calculates and outputs the area 2a of the blood vessel from the amount of sampling points having a blood flow component.

FIG. 3 shows another example of the two-dimensional Doppler operation unit 13. In the two-dimensional Doppler operation unit 13,
Prepare two sets of mixer 134 and low-pass filter 135, 9
A reference frequency f0 having a different O ゜ phase is supplied to each mixer 134. In this way, the direction of the blood flow can be detected from the positive / negative difference between the Doppler shift frequency components fd obtained from the two sets.

FIG. 4 shows a method of calculating the cross-sectional area of the blood vessel by the calculator 139. 4a shows the acoustic line of the ultrasonic wave, and the ultrasonic wave is irradiated in the direction of the arrow, that is, in the downward direction. The arrangement of vertical circles is obtained by sampling the time until the ultrasonic signal reflected in the subject returns at regular intervals, and the lower the time, the longer the ultrasonic reflection signal returns. . Data is obtained on a plurality of acoustic lines by scanning the irradiation and reception of ultrasonic waves in the horizontal direction. FIG.
In this case, there are eight acoustic lines 4a, and the number of samplings for each acoustic line is 10. As a result of the measurement, sampling points at which blood flow components are not detected are indicated by white circles 4b, and sampling points at which blood flow components are detected are indicated by hatched circles 4c. In this case, there are five acoustic lines 4a with blood flow, and the sampling number for each acoustic line is 3, 5, 5, 4, 2 from the left. A numerical value representing the cross-sectional area of the blood vessel is used.

FIG. 5 shows a method of using a spatial filter to determine the cross-sectional area of a blood vessel. The area 5a where the spatial filter is applied is represented by a square. In this case, three rows and three columns are defined as areas. In addition, the blood flow velocity value is used to determine the presence or absence of a blood flow component. The white circles 4b and 5b indicate sampling points at which the blood flow component whose blood flow velocity is extremely slow is not detected.
A sampling point at which a blood flow component having a high blood flow velocity is detected is indicated by a double circle 5c. In the case of FIG. 5A, a sampling point 5b where no blood flow component is detected is surrounded by a sampling point 5c where a high-speed blood flow component is detected in the filtered area 5a. At this time, 5b is determined to be a sampling point having a blood flow component, and as shown in FIG. 5B, the calculation is performed at the time of calculating the blood flow cross-sectional area, whereby the blood vessel cross-sectional area can be obtained with higher accuracy. .

In the above example, a two-dimensional filter is used, but this is also extended to the time axis, and at the same point, a point detected as having no blood vessel component at a certain time is determined before and after the temporal sampling. In the case where there is a blood flow component, it is possible to determine that there is no blood flow component.

As described above, the ultrasonic diagnostic apparatus according to the first embodiment can continuously measure and monitor a patient's blood pressure value without imposing a burden on the patient.

In this embodiment, the case where the blood pressure value is measured has been described. However, a physiological parameter other than the blood pressure value is measured discontinuously by the measuring device 14, and the physiological parameter and the area of the blood vessel are measured. Calibrator 15 based on the relationship
By converting the area of the blood vessel calculated by the two-dimensional Doppler calculator 13 into physiological parameters, other physiological parameters can be displayed continuously.

The change in the area of the blood vessel calculated by the two-dimensional Doppler calculator 13 can be used to continuously monitor the pulse wave.

(Second Embodiment) In the second embodiment,
The display on the monitor 16 will be described.

As shown in FIG. 6, a change in the area of the blood vessel, which is the output of the two-dimensional Doppler calculator 13, that is, a pulse wave is displayed on the monitor as a continuous waveform on 6a. Alternatively, the continuous physiological parameter waveform output from the calibrator 15 can be displayed as 6a. Calibrator 15
The physiological parameter values measured by the measuring device 14 directly from the subject, which are used as reference values for calibration in, are displayed in 6b. The value of 6b is automatically measured and updated at any time interval. The value of 6b can be measured and updated by the inspector at an arbitrary timing by operating the key of 6c, and the measurement result is reflected on the waveform of 6a. The 6C key may be prepared on an operation panel other than the monitor.

A B-mode image of the ultrasonic diagnostic apparatus for displaying a tomographic image by luminance is displayed in 6d, so that the inspector can visually confirm the position of the blood vessel to be monitored and the tomographic image. 6e is a sectional view of the blood vessel, and the frequency analyzer in the two-dimensional Doppler calculator 13.
By superimposing a two-dimensional display on the B-mode image by coloring the blood flow component, blood flow velocity, blood flow direction, etc. of each sampling point which is the output of 138, the inspector can The installation condition such as the position and orientation of the sound wave sensor 11 can be visually confirmed.

Further, by arbitrarily setting the window frame 6f on the tomographic image of the blood vessel, the blood vessel to be monitored can be specified. By obtaining the area of the blood vessel only in the window frame 6f, the area of the blood vessel can be more accurately determined. The blood pressure value can be obtained with higher accuracy. The size and position of the window frame 6f can be arbitrarily set by an inspector through an operation panel or the like.

(Third Embodiment) The ultrasonic diagnostic apparatus according to the third embodiment can synchronously display a blood flow velocity, a blood flow, a blood pressure waveform, a pulse wave, and the like on a monitor.

As shown in FIG. 7, this apparatus includes a Doppler calculator 17 for calculating a blood flow velocity and a blood flow calculator 18 for calculating a blood flow in addition to the configuration shown in FIG.

The Doppler calculator 17 determines the velocity of the blood flow from the magnitude of the frequency shift of the ultrasonic signal reflected in the subject,
The blood flow velocity 7a is output to the monitor 16.

The blood flow calculator 18 is a two-dimensional Doppler calculator 13.
The blood flow rate 7b is obtained from the blood vessel area calculated by the above and the blood flow velocity value calculated by the Doppler calculator 17, and is output to the monitor 16.

The two-dimensional Doppler calculator 13 determines that the change in the area of the blood vessel, that is, the change in the magnitude of the pulse wave, is 7c and the monitor 16
Is output to

The measuring device 14 outputs a blood pressure value 7d measured by the cuff method to the monitor 16.

The calibrator 15 outputs to the monitor 16 a continuous blood pressure waveform 7e in which a change 7c in the magnitude of the pulse wave is converted into a blood pressure value and calibrated using the blood pressure value 7d as a reference value.

The monitor 16 displays the blood pressure value 7d as a numerical value, and displays the blood flow velocity 7a, the blood flow rate 7b, the pulse wave 7c and the blood pressure value 7e in a continuous waveform in synchronization.

Further, the waveform of the electrocardiogram may be inputted to the monitor 16, and the ECG signals may be displayed simultaneously in synchronization with each other.

As described above, by displaying a plurality of waveforms in synchronization with each other, it is possible to efficiently and accurately monitor a patient.

[0061]

As is apparent from the above description, the ultrasonic diagnostic apparatus of the present invention monitors an arbitrary blood vessel such as the abdomen or the head, regardless of the site, as long as the ultrasonic signal can reach. It is possible to easily and stably change the pulse wave, irrespective of the influence of the characteristics or the measurement site of the subject, that is,
Changes in blood vessel area can be monitored continuously.

The change of the pulse wave is converted and calibrated based on the measured value obtained by a measuring device for detecting a physiological parameter of the subject, thereby obtaining a physiological value such as a blood pressure value, a vascular resistance and a vasoconstriction intensity. Change of dynamic parameters,
In addition, stable and continuous monitoring can be performed.

The position of the blood vessel to be monitored can be displayed by displaying a tomographic image of the blood vessel of the subject on the monitor of the ultrasonic diagnostic apparatus or by superimposing the output of the two-dimensional Doppler calculator on the B-mode display. And the installation condition of the ultrasonic sensor can be visually judged, and more accurate measurement can be performed.

Also, by arbitrarily setting a window frame on which a calculation region can be specified on a tomographic image of a blood vessel displayed on the monitor, a blood vessel to be monitored can be specified. By doing so, the area of the blood vessel can be accurately measured.

From the change in the area of the blood vessel, physiological parameters such as pulse wave, blood flow, blood pressure value, vascular resistance, and vasoconstriction intensity can be obtained. The flow velocity, ECG signal and the like can be displayed synchronously and monitored continuously.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an ultrasonic diagnostic apparatus according to a first embodiment of the present invention;

FIG. 2 is a block diagram of a two-dimensional Doppler calculator of the ultrasonic diagnostic apparatus according to the first embodiment;

FIG. 3 is a block diagram of a two-dimensional Doppler calculator using two mixers in the ultrasonic diagnostic apparatus according to the first embodiment;

FIG. 4 is a view for explaining a method of calculating the area of a blood vessel performed by the two-dimensional Doppler calculator according to the first embodiment;

FIG. 5 is a view for explaining another calculation method for calculating the area of a blood vessel performed by the two-dimensional Doppler calculator according to the first embodiment;

FIG. 6 shows a monitor of the ultrasonic diagnostic apparatus according to the second embodiment of the present invention;

FIG. 7 is a block diagram showing a configuration of an ultrasonic diagnostic apparatus according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing a conventional apparatus for measuring a physiological parameter.

[Explanation of symbols]

 10 Subject 11 Ultrasonic sensor 12 Transmitter 13 Two-dimensional Doppler calculator 14 Measuring device 141 Compression device 142 Blood pressure monitor 15 Calibrator 16, 804 Monitor 17 Doppler calculator 18 Blood flow calculator 121 Driver 122 Delay circuit 123 Oscillator 131 Preamplifier 132 Delay circuit 133 Adder 134 Mixer 135 Low-pass filter 136 A / D converter 137 MTI filter 138 Frequency analyzer 139 Operation unit 801 Calibration means 802 Exciter 803 Non-invasive sensor

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toru Nibuya 4-1-1 Tsunashima Higashi, Kohoku-ku, Yokohama City, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (56) References JP-A-7-124162 (JP, A) JP-A-61-25528 (JP, A) JP-A-2-152445 (JP, A) JP-A-7-23951 (JP, A) JP-A-6-237929 (JP, A) JP-A-4-250135 (JP, A) JP-A-60-96233 (JP, A) Japanese Translation of PCT International Publication No. 9-506024 (JP, A)

Claims (8)

(57) [Claims] [Claim 1] was irradiated with ultrasonic waves to a subject, in the ultrasonic diagnostic apparatus comprising an ultrasonic sensor which converts the reflected ultrasonic waves from an object into electrical signals, and a monitor of the display unit, from the digitized signal Fixed and slow frequency components
MTI filter to be removed and output signal of the MTI filter
Frequency analyzer that detects the component with velocity from the signal
A two-dimensional Doppler calculator that calculates a continuous change in the area of a blood vessel from information provided by the reflected ultrasound; a measuring instrument that measures a physiological parameter of a subject discontinuously; the area of the blood vessel, which is calculated by the two-dimensional Doppler operation unit based on the previously obtained relation between the physiological parameters measured by the measuring device comprising a calibrator for converting the physiological parameter, the two Dimensional Doppler operation
The blood sample at digital sampling points on multiple acoustic lines
Determines the presence or absence of a blood flow component and determines the sampling point with a blood flow component
The area of the blood vessel is obtained by counting the accumulated value of
Is an apparatus for continuously displaying physiological parameters converted by the calibrator. 2. The two-dimensional Doppler operation unit performs the determination
The presence or absence of blood flow components at surrounding sampling points.
Taste to determine the presence or absence of blood flow components at each sampling point
The ultrasonic diagnostic apparatus according to claim 1, wherein: 3. A tomographic image of a blood vessel of a subject is displayed on the monitor.
The ultrasonic diagnostic apparatus according to claim 1, wherein the ultrasonic diagnostic apparatus displays the information . 4. A tomographic image of a blood vessel of a subject is provided on the monitor.
And that there is a blood flow component by the two-dimensional Doppler calculator
It is special to display the determined sampling point
The ultrasonic diagnostic apparatus according to claim 1 or 2, wherein 5. A finger pointing a blood vessel displayed on the screen of the monitor.
And the two-dimensional Doppler computing unit continuously changes the area.
Which can specify the blood vessel for calculating
The ultrasonic diagnostic apparatus according to claim 3 or 4, wherein: 6. The method according to claim 6, wherein the measuring device is configured to determine the physiological parameter and the physiological parameter.
The ultrasonic diagnostic apparatus according to claim 1, wherein the blood pressure value is measured by performing the measurement . 7. The method according to claim 1, wherein the measuring device automatically operates at an arbitrary time interval.
Measuring said physiological parameter, and said calibrator is
Each time a measurement is performed on the measuring instrument, the
And a physiological parameter converted from the area of the blood vessel.
The ultrasonic diagnostic apparatus according to claim 1, wherein the ultrasonic diagnostic apparatus is calibrated . 8. The measuring device according to claim 1 , wherein
Measuring a physiological parameter, wherein the calibrator measures
Each time a measurement is made on the instrument, based on the results of the measurement,
Calibrate physiological parameters converted from the vessel area
The ultrasonic diagnostic apparatus according to claim 1, wherein: