JPS633846A - 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 [Field of Industrial Application] The present invention relates to an ultrasound imaging device configured to obtain an echo image of a target by transmitting and receiving ultrasonic waves, and is particularly suitable for medical diagnosis. The present invention relates to an ultrasonic diagnostic device that provides spatial distribution information of organ movement speed.

[Conventional technology]

Examples of devices used in ultrasound diagnosis to detect the two-dimensional distribution of blood flow velocity and display it as an image using color tones include the examples described in the Japanese Society of Ultrasound in Medicine Proceedings (42-C-61, 83). However, since these devices were designed to measure blood flow speed, they were not suitable for detecting relatively small movement speeds such as the movement speed of internal organs.

[Problem to be Solved by the Invention 3 The speed of translational movement, deformation movement, etc. of organs in the body also provides useful ultrasonic diagnostic information in a sense other than blood flow speed. For example, when there is a tumor within an organ, the movement of the tumor part with breathing, pulsation, etc. is different from that of the surrounding area. Therefore, there has been a desire for the emergence of a device that would be able to detect and diagnose tumors by detecting movement speed and displaying images.

The purpose of the present invention is to accomplish the above-mentioned medical diagnosis [useful,
The purpose of the present invention is to provide an ultrasonic diagnostic device that detects the movement speed of internal organs and displays it as an image.

[Means and effects for solving the problem] In accordance with this purpose, in the non-invention, there is a method for transmitting and receiving ultrasonic waves.
An ultrasonic imaging device configured to obtain an echo image of the object is provided with means for detecting the movement speed of the echo image, and a color tone corresponding to the detected movement speed to detect the echo 1#! We propose a diagnostic device that is equipped with means for displaying.

〔Example〕

The present invention will now be explained with reference to the embodiments. I will explain in more detail.

FIG. 1 H1 is a block diagram of the system configuration of one embodiment. A pulsed ultra-hemorrhoid wave is transmitted and received from a transmitting/receiving circuit 2iC controlled by a ski-an turbidity circuit 3 via an array type forceps scanning probe l. The obtained signal is written into the corresponding address of the two-dimensional memory 4 or 5 according to instructions from the scan control circuit 3.

The above part may have the same configuration as a conventional B-mode ultrasonic imaging device, but when trying to achieve high resolution in detecting motion in the ultrasound beam direction, the envelope signal is used as in a conventional B-mode device. Rather than writing to memory,
The signal t with the carrier wave is written into the memory.

At the corresponding addresses of memories 4 and 1 and 5,
- Signals at the same position with a fixed time difference are written in, and the signals read from each n are window-processed by 7 and 8 according to the measurement position signal from the motion speed measurement position control circuit 6. :J? and 10. A cross-correlation between the data in the two-dimensional memories 9 and 10 is calculated by 11, and a motion velocity vector is determined. In other words, the coordinates of the peak position of the cross-correlation function are (
X? .

Yp), the motion velocity vector to be determined is given by (Xp/ΔT, Yp/JT). .

Calculation of the component in the direction of interest of the motion velocity vector and determination of a color tone according to its magnitude are performed in accordance with a signal from the direction of interest designation circuit 12, and are written to an address in the two-dimensional memory 14 corresponding to the motion velocity measurement position. When data is transferred to the display device, the data in the two-dimensional memory 4 or 5 and the data in the two-dimensional memory 14 at the corresponding address are transferred as brightness modulation data and color modulation data, respectively. In addition, as a method of associating the motion speed with a color tone, for example, the maximum positive speed is displayed in red, the maximum negative speed is displayed in purple, and the intermediate speed is associated with a term in the spectrum of light.

〔Effect of the invention〕

As explained above, according to the present invention, an ultrasonic diagnostic device that provides diagnostic information useful for tumor discovery and diagnosis can be realized with a relatively small increase in cost compared to conventional B-mode devices. The medical or industrial effects of the present invention are extremely significant.

In addition, in the above explanation, the speed of movement is detected as a two-dimensional vector using an arrayed sleep scanning probe,
Although we have described an example in which the two-dimensional distribution is displayed, the scope of application of the present invention is not limited to this. When displaying a dimensional distribution, Rurui, conversely, detects only the component of the motion velocity in the ultrasonic beam direction and displays its two-dimensional distribution, or when using a mechanical scanning probe. Applicable.

Regarding the motion velocity detection method, the phase change Δψ(ω) of each frequency component (angular velocity ω) is measured using the correlation function of two two-dimensional echo signals with a certain time difference with respect to the corresponding part of the corresponding raster. Sorry, the desired motion speed vff
, can be obtained using the following equation.

Here, C is the speed of sound. The present invention is also applicable to cases where motion speed is detected using this principle.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention. l... Array-shaped Hiko Nucan probe, 2... Transmission/reception circuit, 3... Scan control circuit, 4, 5... Two-dimensional memory, 6... Motion speed measurement position control circuit, 7 .8・
. . . Window processing circuit, 9.10 . . . 2 secondary memory, 11 . . . Cross-correlation calculation circuit, 12 .
・2 Kumoto memory.

Claims (1)

[Claims] 1. In an ultrasonic imaging device configured to obtain an echo image of a target by transmitting and receiving ultrasonic waves, means for detecting the movement speed of the echo image and displaying the echo image in a color tone corresponding to the detected movement speed An ultrasonic diagnostic apparatus characterized by having means for.