JPS6012042A - Ultrasonic diagnostic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (a) Technical Field of the Invention The present invention relates to an ultrasonic diagnostic apparatus that uses an ultrasonic probe to obtain a tomographic image of a living body. The present invention also relates to an ultrasonic diagnostic device that provides stable display.

(b) Prior art and problems Ultrasonic diagnostic equipment generates ultrasonic waves using an electroacoustic transducer installed in an ultrasound probe, receives reflections of the ultrasonic waves, and forms images. Diagnose the tissue. Such an ultrasonic diagnostic apparatus is constructed as shown in Figure 1. FIG. 1 is a block diagram of a conventional ultrasonic diagnostic apparatus.

A probe 1 receives an oscillation signal output from a triver circuit 2 under the control of a control unit 5, transmits an ultrasonic wave, receives the reflection, and sends a received signal to a receiver circuit 3; a first storage section 4 that stores received data output from the first storage section 4; an image creation section 7 that forms an image using the received data retrieved from the first storage section 4; An image display section 9 that displays an image, and a second storage section 8 that stores the calculation data calculated by the calculation section 6, sends it to the image creation section 7, and adds the calculation data to predetermined image data are provided. ing.

Accordingly, the image display section 9 is configured to display an image to which the diagnostic image transmitted by the probe 1 and diagnosed by the super ii is added with the diagnosis time and the patient's name.

The position of a puncture needle has been detected using such an ultrasonic diagnostic apparatus as shown in FIG. FIG. 2 is an explanatory diagram illustrating detection of a puncture needle by a conventional ultrasonic diagnostic apparatus.

An electroacoustic transducer element 11 is provided on the probe 1 in close contact with the body surface 12A, and the element 11 transmits and receives ultrasonic waves in response to signals transmitted and received via the cable IA. Therefore, the needle 10A of the puncture 10 inserted into the living body 12 is
An image in which the position of the needle 10A is detected is obtained by reflection of the ultrasonic wave transmitted in the direction of the arrow A. However, since most of the ultrasonic waves reflected in the direction of arrow A are reflected in the direction of arrow B, the reflected waves received by element 11 are so small that a tomographic image showing needle 10A cannot be obtained.

Conventionally, in such a case, the puncture 1o is swung in the direction of the arrow C, and the position of the needle 10A is detected by the reflected waves caused by changes in the tissue at the contact area between the needle 10 and the living body 12 (!).
- Obtaining images was practiced.

Therefore, there was a problem in that it was not possible to obtain a tomographic image from which the exact position of the needle 10A could be determined.

(C) Purpose of the Invention The purpose of the present invention is to use an ultrasound probe that is in close contact with the body surface and an ultrasound probe that transmits and receives ultrasound transmitted to a hollow part through the tip of a puncture needle. In this way, the above-mentioned problems are eliminated by receiving the ultrasonic waves transmitted by one of the probes by the other probe and detecting the position of the tip of the line.

(d) Structure of the Invention An object of the present invention is to provide an ultrasonic diagnostic apparatus as described above with a second ultrasonic probe fixed to a puncture inserted into a living body at a predetermined location, Based on the received data of the ultrasonic waves that are transmitted to the hollow part of the needle and the living body through the tip and transmitted and received between the first and second ultrasonic probes, the calculation unit calculates the value of the tip of the needle. This is achieved by an ultrasonic diagnostic apparatus characterized in that the position is calculated and a tomographic image showing the position of the puncture needle is output to an image display unit.

(e) Examples of the invention The present invention will be explained in detail below with reference to FIGS. 3 to 5.

Fig. 3 is a configuration diagram showing an embodiment of the ultrasonic diagnostic apparatus according to the present invention, Fig. 4 (a) and (b) are explanatory diagrams of the probe of the puncture needle, and Fig. 5 (a) is an explanatory diagram of ultrasonic transmission, (b
) is an explanatory diagram of the received signal.

A second probe 21 fixed to the puncture needle is provided, and the second probe 2 is configured to be driven by a driver circuit 22 controlled by the control unit 5, The rest of the configuration is the same as in FIG. 1.

The probe 21 is fixed to one end of the needle 10A as shown in FIG.
D is connected.

(b) shows a cross-sectional view of the probe 21, and the needle 1
Acoustic medium 2 having a through hole 2IC that fits the inner circumference of 0A
1A, and a number of electroacoustic transducer elements 21B are arranged around the through hole 21C.

When puncturing is performed as shown in FIG. 5 using the needle 10A provided with the probe 21 in this manner, the following ultrasonic waves can be transmitted and received.

When the needle 10A is inserted into the living body 12 and the tip 10B reaches a predetermined position, the probe 21 transmits ultrasonic waves. This ultrasonic wave is transmitted to the 11-length hollow part of the needle 10A, and is transmitted to the living body 12 through the tip 10B. □Therefore, body surface 12
The signal is received by the probe 1 that is in close contact with A. This reception is performed by each of the elements 11-0 to 11-8 arranged in the probe 1, and each element has a received waveform P shown in FIG.
can be obtained. Also, this received waveform P is at the tip 10B.
The receiving time is different for each element depending on the location where the tip 10B is located. The distance from the child 21 to the tip 10B is 1
11.The speed of sound is CM.

The distance of the living body 12 from the tip 10B to the element 1l-5t is 4.
2. If the sound velocity of the living body 12 is CT, it can be expressed by equation (1).

t=−Lee+Wataru・・−・・−・−・・−−−−−−−・
-・-・・・・(1) 0M CT Therefore, when the time t is detected as described above, the living body 1
The distance 12 of 2 can be calculated using the following equation (2) from equation (1).

1 12 =CT (t-1)・・・・・・・・・・・・
・・・・・・・・・・・・・・・(TSM) Therefore, the probe 1 receives the ultrasonic waves transmitted from the probe 21, and the received data is sent to the calculation unit 6 via the receiver circuit 3. The calculation unit 6 calculates the distance 12 of the tip 10B, and puncture 1 with the tip 10B located at this distance 12.
Calculated data of 0 is stored in the second storage section 8. This calculation data is combined when forming a tomographic image obtained by driving the probe 1 of the image creation unit 7, and a tomographic image displaying the accurate position of the puncture needle 10A can be output to the image display unit 9.

Note that this probe 21 has a receiver circuit 23 indicated by a dotted line.
If you set
It is also possible to similarly detect the position of the tip 10B based on the data received by the receiver circuit 23 at step 1.
A similar effect can be obtained.

(f) Detailed Description of the Invention As described above, the present invention includes the second probe 21 fixed to the puncture needle 10A, and the needle 10A between the first and second probes 1 and 21. The position of the tip 10B of the needle 10A is calculated at a distance of 2 by transmitting and receiving ultrasonic waves through the diaphragm, and the position of the puncture 10 is displayed on the tomographic image at E7. As a result, a tomographic image that accurately and clearly displays the position of the puncture needle 10A can be obtained without swinging the puncture needle 10A as in the conventional method, and the practical effect is great.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a conventional ultrasonic diagnostic device, FIG. 2 is an explanatory diagram for detecting the position of a puncture needle, FIG. 3 is a configuration diagram showing an embodiment of an ultrasonic diagnostic device according to the present invention, and FIG. 4 (a) (b) of
The figure shows an explanatory diagram of the probe of the puncture needle, the (a) diagram of FIG. In the figure, 1 and 2 are probes, 2.22 is a driver circuit, 3.23 is a receiver circuit, 4 is a first storage section, 5 is a control section, 6 is a calculation section, 7 is an image creation section, 8 is a second storage section, 9 is an image display section, 1O is a puncture, and 11.21B is an element. Figure 2, 3rd prefecture, 4th ward (ll) 27θ 21β (unevenness #S diagram r2--11

Claims (1)

[Claims] A first ultrasound probe that is in close contact with the body surface, a first driver circuit that drives the first ultrasound probe, and a receiver circuit that receives a reception signal of the first ultrasound probe. a first storage section that stores received data output from the receiver circuit; a calculation section that performs predetermined calculations on the received data; and a calculation section that stores the calculated data. Second to do
a storage section, and an image display section that displays an image formed from data retrieved from the first and second storage sections, respectively, and is fixed to a puncture inserted into a living body from a predetermined location. A second ultrasonic probe is set up through the needle tip of the puncture, and is transmitted to and from the hollow part of the needle and the living body, and is transmitted and received between the first and second ultrasonic probes. An ultrasonic diagnostic apparatus characterized in that the arithmetic unit calculates the position of the needle tip based on received ultrasound data, and a tomographic image showing the puncture position is output to the image display unit.