JPS58198336A - Vocal band b mode image displayable ultrasonic tomography 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 The present invention relates to an improvement in an ultrasonic tomography device capable of displaying vocal cord B-mode images.

BACKGROUND ART Conventionally, ultrasonic tomography devices have been used to diagnose each part of a subject or the entire body, and its superiority has been evaluated. Incidentally, attempts have been made to obtain tomographic images of organs such as the vocal cords that vibrate at several 10011 z/second using real-time ultrasonic tomography. However, because the time required to form one frame of a tomographic image is slow compared to the frequency of the vibrating organ, it is only possible to distinguish between the vibrating part and the stationary part, and it is only possible to distinguish between the vibrating part and the stationary part, and to determine the pattern of change in the entire vocal cords. It was not possible to grasp whether the changes were accompanied by In addition, when obtaining changes in movement, it is possible to obtain changes in movement only on one beam line of a cross section using the ultrasonic M mode method, but it is possible to obtain changes in movement only on one beam line of a cross section, but I couldn't detect any changes. Knowing the relationship between speech and the mechanism of the vocal cords is medically important, and there is currently no device that can display the mechanism of vocal cord movement as it changes over time.

An object of the present invention is to eliminate the above-mentioned drawbacks and to obtain a tomographic image of the organ at any time phase even if the frequency of the vibrating organ is faster than the time required to form one frame of the tomographic image. An object of the present invention is to provide a display device that can display patterns.

The features of the present invention include a microphone that detects an audio signal;
It is equipped with a synchronization signal generator that generates a signal synchronized with the N force of the microphone, and a means for controlling the drive timing of the ultrasonic wave generating transducer by the output of the synchronization signal generator. The present invention is capable of displaying a tomographic image at a predetermined time phase of vibration.

Hereinafter, the present invention will be described in detail along with examples.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, 1 is a vocal cord region of a subject, and 2 is a probe used in an electronic scanning type (linear, sector, etc.) or mechanical automatic scanning type ultrasonic tomography apparatus. Reference numeral 6 denotes an ultrasonic wave transmitting/receiving device, 4 an ultrasonic beam switching controller, and a horizontal direction (hereinafter simply referred to as X) and a vertical direction (hereinafter simply referred to as Y) sweep circuit. 5 is a tomographic image CRT monitor that displays a tomographic image of the vocal cord region. 10 is a microphone that detects the sound from the vocal cord part 1, and its output is sent to an amplifier 11.
It is now amplified by 12゜16 is a comparator, 14 is a Y sweep signal generator, 15 is an X sweep signal generator, and 16 is a phase that can freely set the position of any time phase (phase) within one cycle of the audio waveform. It is a setting device. Reference numeral 17 denotes a trigger signal generator which outputs a trigger signal synchronized with an arbitrary time phase of one audio cycle based on the output of the comparator 13, and uses, for example, a monostable multivibrator (MM). Alternatively, it may be an internal synchronization circuit used inside a synchroscope or the like. Reference numeral 18 denotes an audio wave CRT monitor that displays audio waveforms using signals from the Y sweep signal generator 14, the X sweep signal generator 15, and the trigger signal generator 17.

FIG. 2 is a time chart explaining the operation of this embodiment, in which (A) is the audio signal from the amplifier 11, (B) is the output signal from the comparator 12, and (C) is the output signal from the X sweep signal generator 15. is the output signal of

Next, the operation of this embodiment will be explained with reference to FIGS. 1 and 2. A probe 2 and a microphone 10 are installed in the vocal cord region 1 of a subject in the vicinity of the probe 2. The audio signal of the vocal cord section 1 obtained by the microphone 10 is amplified by the amplifier 11, and then is combined with the Y sweep signal of the X sweep signal generator 14 and the audio wave CR.
The signal is input to the T monitor 18 and also to one terminal of the comparator 12. The comparator 12 receives an input of an audio signal (A) as shown in FIG. 2, which changes from positive to negative or from negative to positive every l cycles.
) outputs a waveform signal (B). This output signal (
B) is input to the X sweep signal generator 15, and the output signal (B
) generates an output signal (0) in synchronization with the rise of the signal.

The output signal (C) is input to the audio wave C'RT monitor 18 and also to one input terminal of the comparator 13. The voltage set by the phase setter 16 is input to the other input terminal of the comparator 16. This comparator 1
The output of 6 is input to a trigger signal generator 17, which generates a trigger signal synchronized with an arbitrary time phase (phase) within one cycle of the audio waveform. This trigger signal is 1. Audio wave monitor 1
8 and displays the position of an arbitrary time phase P of the audio waveform O cycle. Further, the output trigger signal of the trigger signal generator 17 is inputted to the ultrasonic beam switching controller and the By controlling the movement and the ultrasound transmission/reception timing, a tomographic image at any time phase of the audio wave can be displayed on the tomographic image 0)tT monitor 5 using each output signal.

The tomographic image can also be displayed on a television screen using the X-Y sweep method or a scan converter, and the waveform display on the audio wave monitor can be displayed on the same screen as the tomographic image via a scan converter. It is also possible to display it on top.

It goes without saying that the present invention is not limited to the embodiments described above, and can be modified in various ways without changing the gist thereof.

As explained above, according to the present invention, it is possible to display a tomographic image at a predetermined time phase of vibration of an organ such as a vocal cord that vibrates faster than the time required to form one frame of a tomographic image. .

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of the present invention;
FIG. 2 is a time chart for explaining the operation of this embodiment. 1 Vocal cord part 2 Probe 6 Ultrasonic wave transmitting/receiving device 4 Ultrasonic beam switching controller & X-Y sweep circuit 5
Tomographic image CRT monitor 10 Microphone 11 Amplifier 12.13 Comparator 14 Y sweep signal generator 15-X sweep signal generator 16 Phase setter 17 Trigger signal generator 18
Audio wave CRT monitor agent Patent attorney Autumn 1) Collection Figure 2

Claims (1)

[Claims] In a scanning tomography apparatus, a microphone detects an audio signal, a synchronization signal generator generates a signal synchronized with the output of the microphone, and the drive timing of an ultrasonic generation transducer is controlled by the output of the synchronization signal generator. What is claimed is: 1. An ultrasonic tomography apparatus comprising means for displaying a tomographic image at a predetermined time phase of vibration of a vibrating organ such as a vocal cord.