JPH0191840A - Ultrasonic imaging apparatus - Google Patents

Abstract

PURPOSE:To always display a concern region in a stationary state, by providing an apparatus for measuring the moving speed of a reflecting body and a control part changing a display position corresponding to the moving speed. CONSTITUTION:A wave transmitting part 2 is used to receive the reflected signal of an object by an array type ultrasonic probe 1. The receiving signal obtained by a phasing device 3 is formed into an image according to a usual B-mode ultrasonic image regeneration method by a processing part 4 to be displayed on a display part 5. Herein, the moving speed relating to the signal from the interior of the art 7 indicated by an ROI setting part 6 of a concern region is measured by a moving speed measuring part 8. This measured value 9 is used to control the operation of the processing part 4 and the position of the display part 7 is moved in the same direction as the movement of matter. By this method, the image of the matter displayed on an ROI display part 10 is not affected by the motion of the object and the matter is displayed in a stationary state even when the magnification of the ROI part is increased.

Description

[Detailed description of the invention] [Industrial application field] This invention relates to improving the motion resistance of ultrasonic imaging devices.

[Conventional technology]

Conventionally, methods for enlarging and displaying a region of interest have been known. (
For example, JP-A-59-20155) [Problem to be solved by the invention] However, when the body is moving like a living body, the region of interest moves out of the field of view when the magnification becomes large. I feel very inconvenienced.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an ultrasonic imaging apparatus in which even when a region of interest is displayed at a large magnification, the region of interest does not move out of the field of view due to movement of the object.

[Means for solving problems]

A feature of the present invention is that, at the same time as tomogram imaging using ultrasound,
The point is that the speed of the region of interest or a region in its vicinity is measured, and the region of interest to be enlarged and displayed is automatically moved based on the measured value.

[Effect]

According to the configuration of the present invention, the area to be enlarged and displayed can be moved automatically following the movement of the region of interest, and the region of interest can always be displayed in a stationary state.

〔Example〕

The configuration of the present invention will be explained in detail below using examples. In FIG. 1, a wave transmitter 2 is used to receive reflected signals from an object by an array type ultrasonic probe 1. The received signal obtained by the phasing section 3 is subjected to a normal B-mode ultrasound image reconstruction method by the processing section 4 to be converted into an image and displayed on the display section 5 as an image. Here, the moving speed of the signal from inside (near) the portion 7 specified by the region of interest (ROI) setting unit 6 is measured by 8. By using this measurement value 9, controlling the movement of 4, and moving the position of 7 in the same direction as the movement of the object, the object image displayed on the ROI display section 10 is not affected by the movement of the object. Therefore, even if the ROI magnification ratio is increased, the object is displayed stationary, making it highly useful. Here, the enlarged display of the ROI is performed by displaying the signal of only the portion 7 on the entire screen 10 under the control of 6. Here, when measuring the moving speed using 8, it is necessary to increase the number of times the beam passes through the point of interest 11, so as shown in Fig. 2, the point of interest near the ROI is Ultrasonic scanning will also be performed frequently.

As shown in FIG. 3, the speed measuring section has a structure in which a storage section 13 and a phase meter 14 are used to compare the phase difference between the previous and current reflected signals, or the moving speed in the distance direction is detected by the usual pulsed Doppler method. Naturally, it is also possible to find out the lateral velocity by the correlation method. Further, in the case of such enlarged display, by holding a large number of images in the storage unit 12 and reading them out at a speed slower than the speed at which they are written, the imaging device becomes more resistant to movement.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to obtain an enlarged image of a stationary object by following the movement of the region of interest and changing the area to be enlarged and displayed. Detailed 1ilK detection becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the overall configuration of the present invention, FIG. 2 is a diagram showing an ultrasonic beam scanning method, and FIG. 3 is a block diagram showing an example of the configuration of a velocity measurement method. 1... Probe, 2... Wave transmitter, 3... Phaser, 4
... Processing section, 5... Display section, 6... ROI setting section, 8... Movement speed measurement section, 10... ROI display section,
12...Storage section. ¥/I! ] Revelation 2 Figure 5A Part 3

Claims (1)

[Claims] 1. A device for displaying an object image using ultrasonic waves, which includes a device that measures the moving speed of a reflector, and a control section that changes the display position in accordance with the moving speed. Features of the ultrasonic imaging device. 2. The ultrasonic imaging device according to claim 1, wherein the displayed image is enlarged from the actual size.