JPH0678926A - Ultrasonic diagnostic device - Google Patents

Abstract

PURPOSE:To provide an ultrasonic diagnostic device which can collect tomograms without being affected by the aspiration motion of an inspected person. CONSTITUTION:An ultrasonic diagnostic device is equipped with an aspiration monitor system 2 for monitoring the aspiration state of an inspected body P, R-wave detection system 3 for detecting the R-wave of a cardiogram on the basis of the cardiogrphic information supplied from the inspected body P, image formation system 6 for preparing a tomogram on the basis of the ultrasonic data received from an ultrasonic probe, and an image collection system 4 which receives the signal supplied from the aspiration monitor system 2 and the R- wave detection system 3 and collects the prescribed images from the image formation system 6.

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 which transmits and receives ultrasonic waves to generate a tomographic image, and particularly when diagnosing a heart disease, obtains a tomographic image of the heart in synchronization with the heartbeat of the subject. The present invention relates to improvement of ultrasonic diagnostic equipment.

[0002]

2. Description of the Related Art A method for diagnosing a heart disease using an ultrasonic diagnostic apparatus includes exercising a subject, administering a drug, or applying a load to the heart by using electricity to measure the heart before and after the load. There is a method of comparing the wall motion of the heart by collecting ultrasonic tomographic images of the. In such ultrasonic diagnosis, it is possible to collect an ultrasonic tomographic image in the process of contracting the heart in synchronization with the R wave of the electrocardiogram.

[0003]

However, in the tomographic image acquisition by the above-mentioned ultrasonic diagnostic apparatus, since the respiratory motion of the subject may affect the transmission and reception of ultrasonic waves, the doctor can obtain images with little influence. The device is operated so as to collect the data, and one having a small influence of respiratory motion is selected for inspection from a plurality of collected tomographic images. Further, when a satisfactory tomographic image cannot be acquired, the inspection is re-inspected, so that the image acquisition operation becomes complicated in the load inspection in which the inspection time is insufficient, and the patient is overloaded.

The present invention has been made to solve these problems, and an object of the present invention is to provide an ultrasonic diagnostic apparatus capable of collecting tomographic images without being affected by the respiratory motion of the subject.

[0005]

SUMMARY OF THE INVENTION An ultrasonic diagnostic apparatus according to the present invention uses an electrocardiogram R based on electrocardiographic information from a subject.
An R-wave detection system that detects a wave, an image generation system that generates a tomographic image based on ultrasonic data received from an ultrasonic probe, a respiratory monitor system that monitors a respiratory state of a subject,
The periodic constant image acquisition period in the respiration of the subject is recognized from the respiratory monitor information, and R is set only during the image acquisition period.
And an image acquisition system for acquiring the generated tomographic image in an image memory in synchronization with the wave. The ultrasonic diagnostic apparatus may be provided with means for variably adjusting a periodic constant image acquisition period in breathing of the subject.

[0006]

In the ultrasonic diagnostic apparatus of the above means, the R wave of the electrocardiogram of the subject is detected by the R wave detection system, and the respiration state is grasped by the respiration monitor system. Therefore, in order to obtain a good tomographic image, for example, based on the breathing state before a few breaths, inspiration is performed and a certain time / period is estimated as an image acquisition period, during which ECG synchronization is performed to perform ultrasonic tomography. You can collect images. As a result, not only the conventional electrocardiographic synchronization but also the respiratory motion state can be used as a trigger for image acquisition, so that the images required for the examination can be acquired quickly and reliably.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an ultrasonic diagnostic apparatus to which the present invention is applied will be described below.

The ultrasonic diagnostic apparatus transmits and receives ultrasonic waves to and from a target portion of the subject P by an ultrasonic probe (not shown), generates a tomographic image based on the received ultrasonic data, and the generated image. Can be displayed on the monitor 7. FIG. 1 is a system configuration showing a main part of the ultrasonic diagnostic apparatus.

A bed 1 on which the subject P is placed, a respiration monitor system 2 for monitoring the respiration state of the subject P, and an R wave detection for detecting an R wave of an electrocardiogram based on electrocardiographic information from the subject P. The system 3, the image generation system 6 that generates a tomographic image based on the ultrasonic data received from the ultrasonic probe, the image generation system 6 that receives signals from the respiration monitor system 2 and the R wave detection system 3.
An image acquisition system 4 for acquiring a predetermined image from the image acquisition device, an image memory 5 for recording the images acquired by the image acquisition system 4, and a monitor 7 for displaying the tomographic image stored in the image memory 5. Next, a procedure for inspecting a cardiac function using the ultrasonic diagnostic apparatus will be described.

A subject P is placed on the bed 1, and a mask (not shown) is attached to the mouth of the subject P. The respiratory condition of the subject P is monitored by the respiratory monitor system 7, and the monitor information indicating the respiratory condition becomes an analog signal as shown in FIG. 2 and is sent to the acquisition period estimation unit 41 of the image acquisition system 4. In the acquisition period estimation unit 41, an appropriate threshold S is set in advance based on the waveform of the respiratory state, the analog signal is converted into digital data that determines the image acquisition period, and sent to the control unit 42. On the other hand, in the R-wave detection system 3, the R-wave is detected by obtaining the electrocardiographic waveform shown in FIG. 2 from the electrocardiographic information of the subject P by means similar to that for obtaining the electrocardiogram. Control unit 42 of system 4
Sent to.

The control unit 42 recognizes the periodic constant image acquisition periods a1 and a2 in the respiration of the subject P from the monitor information of the respiratory monitor system 2, and periodically generates from the detection information of the R wave detection system 3. The R wave is recognized and synchronized with the R wave only during the image acquisition period. For example, during the period shown in a2 of FIG.
To send the generated tomographic image to the image memory 5 via the image collecting unit 43. As shown in FIG. 3, the image memory 5 stores tomographic images H1 and H2 in the contraction process, and these tomographic images can be displayed on the monitor 7.

Although not shown in the drawing, the value of the threshold S in the acquisition period estimation unit 41 of the image acquisition system 4 is made variable so that the periodical fixed image acquisition period in the respiration of the subject P is long. It is possible to variably adjust the height and adjust the image acquisition time.

[0013]

Since the ultrasonic diagnostic apparatus according to the present invention performs electrocardiographic synchronization while monitoring the respiratory condition, images are collected in consideration of the respiratory motion of the subject. Therefore, it is not necessary to collect extra images in consideration of the influence of respiratory motion.
In addition, since the image required for the examination can be obtained by one operation, re-examination is not required, the image collecting operation is simplified, and the examination load on the patient can be reduced.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a main part of an ultrasonic diagnostic apparatus according to an embodiment of the present invention.

FIG. 2 is a waveform diagram showing an image acquisition period and the like.

FIG. 3 is a composite view of ultrasonic tomographic images obtained by image acquisition.

[Explanation of symbols]

 1 bed 2 respiratory monitor system 3 R wave detection system 4 image acquisition system 5 image memory 6 image generation system 7 monitor 41 acquisition period estimation unit 42 control unit 43 image acquisition unit

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[Procedure amendment]

[Submission date] May 26, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (2)

[Claims] 1. An R wave detection system that detects an R wave of an electrocardiogram based on electrocardiographic information from a subject, and an image generation system that generates a tomographic image based on ultrasonic data received from an ultrasonic probe. A respiratory monitor system that monitors the respiratory state of the subject and a periodic constant image acquisition period in the respiratory of the subject are recognized from the respiratory monitor information, and the generated tomographic image is synchronized with the R wave only during the image acquisition period. An ultrasonic diagnostic apparatus having an image acquisition system for collecting in an image memory. 2. The ultrasonic diagnostic apparatus according to claim 1, further comprising means for variably adjusting a length of a periodic constant image acquisition period in breathing of the subject.