JPS584540A - 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] This invention is an ultrasonic diagnostic apparatus K11l.

Ultrasonic diagnostic equipment attempts to obtain tomographic information by taking advantage of the fact that each tissue in the body has a high reflectivity for sound waves. In other words, if one thin ultrasonic beam is emitted into the body, each beam that exists in that direction! 1
Reflected waves are returned one after another from the fabric, but since the propagation mode of sound waves in the living body is constant, the time gap until the reflected waves return corresponds to the depth. If a directional ultrasonic transducer is successful, the echo signal obtained from this transducer will represent a one-dimensional distribution of reflectance in the depth direction along the meat in the direction of the ultrasonic liquid beam. becomes. Therefore, when this ultrasonic beam is scanned in one right circle inside the body, the echo signal obtained represents the distribution of 0IllO reflections within that plane. Therefore, using a CAT@ display device, etc., it is possible to modulate the brightness according to the intensity of the echo signal and display a tomographic image showing the position KII corresponding to the ultrasound beam. When displaying a cross section, it is not always clear which part of the displayed tomographic image is a cross section. Therefore, a mechanism was installed to mechanically rotate the ultrasound transducer by 90' to obtain tomogram tubes in two directions at right angles [1].
11 has been considered, but in this case, since a mechanism is added, the ultrasonic transducer will be covered with heavy snow and its weight will increase. Therefore, in the past, region determination in Fi tomographic images was performed using manual techniques.・The purpose of the present invention is to provide an ultrasonic TL diagnostic device 1 that can obtain real-time tomographic images in multiple directions while using a small W ultrasonic transducer. I'll explain while wearing them. First, as shown in FIG. 1, the ultrasonic transducer 1 according to the present invention is divided into m (for example, n>=82) in the vertical direction and Km (for example, n>=82) in the horizontal direction.
) is divided into a two-dimensional play in which mXm@IQ elements are arranged two-dimensionally. The ultrasonic transducer 1 is connected to a wave transmitting/receiving circuit 8 via a switching circuit 2. The switching circuit 2Fi is controlled by the control circuit 4, and the transmitter/receiver 61 is switched so that the ultrasonic transducer 1 is simultaneously driven in the column direction or the row direction. The echo signal obtained from the transmitter/receiver route is a CRT
Display stimulation device 1! The image is displayed on the display m screen of the display device 6 (while being positioned by the sweep signal generated from the sweep signal generation circuit 5).

For example, when performing an ultrasonic beam O sector scan by pressing the ultrasonic transducer l against the body surface 1iK of the subject 70, if the scanning direction tlII1 is round in the vertical direction, then the horizontal elements 1~@ ID(i cell-
H) to MWI#, and if you want the scanning direction to be horizontal, #i vertical elements a1j-aB4 (j
= 1-*) tMIIK drive. The switching circuit 2 is excellent at this switching. This means that the vertical or horizontal elements of the trench are moved together. Electronic control of the sector scan uses a normal 7-stage sized array system.

This is how this implementation f! In the case of O, the switching circuit 2f: When switched, it is possible to obtain a large number of square cross-sections 1ILvf11, and these can be displayed simultaneously on one Oij plane of the display device 6.

In this embodiment, the vertical and horizontal elements of the ultrasonic transducer and -su02-dimensional play were driven to Oka W#, but the element 1 was simultaneously driven in the diagonal direction as shown in Hatakuni No. Zuru (example: bll ~b-, +2
) column, then b12 to i, and column 0 can be simultaneously driven).

As described above, the examples are as follows. JlK
According to this method, the scanning direction can be electronically switched by a switching circuit, and it is possible to easily obtain multidirectional tomographic images. Therefore, we were able to obtain a lot of biological information,
It also becomes easier to determine the part of the tomographic image. Moreover, since the ultrasonic transducer is only a two-dimensional play, it is lightweight, small, and convenient to handle.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an ultrasonic transducer according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of the same embodiment, M8
The figure shows a planar model of a modified example. 1--Ultrasonic transducer, 2--Switching circuit, 8-- Wave transmitting/receiving circuit, 4-
・Control circuit, 6-sweep signal generation circuit, 6-display device, 7
・−・Subject・Applicant Shimadzu Corporation

Claims (1)

[Claims] (1) Divided into a predetermined number of rows in one direction and 4
A two-dimensional play of ultrasonic transducers divided into a predetermined number of rows in 110 directions, and a driving delta pulse applied to the two-dimensional array of ultrasonic transducers to emit ultrasonic sound. a two-dimensional array of acoustic transducers KlN; a wave transmitting/receiving circuit for obtaining multiple echo signals from signals obtained by the reflected waves that have reached the ultrasonic transducer;
−? 0 Simultaneous driving of the two-dimensional array element by the key distribution/receiving circuit and the strong I of the echo signal obtained by the transmitting/receiving circuit! ! and a display device for displaying an ultrasonic tomographic image in a plane including the row direction and a two-dimensional array of acoustic wrinkle transducers in the display device Ktll and a two-dimensional array O of the acoustic wrinkle transducer in the row direction and the column direction. An ultrasonic diagnostic apparatus configured to display an ultrasonic tomographic image in a plane including.