JPS63242247A - 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] [Industrial application field]

The present invention relates to an ultrasonic diagnostic apparatus that obtains a tomographic image of an inside of a living body by receiving reflected waves of ultrasonic waves incident on the inside of the living body.

[Conventional technology]

2. Description of the Related Art Conventionally, ultrasound diagnostic apparatuses capable of imaging intracardiac blood flow information using the pulsed Doppler method have been used. Such ultrasonic diagnostic equipment is equipped with a digital image memory, and freezes (freezes) by storing images at any time phase in one image that is continuously obtained like a moving image in this memory. freezing). That is, when an operator presses a button at any time while observing a tomographic image displayed in a moving image, the image at that time is frozen and displayed as a still image.

[Problems to be solved by the invention]

However, when attempting to freeze a single image of intracardiac blood flow, the movement of the heart valves is extremely fast, and it is quite difficult to freeze the image at the desired time phase. Of course, the above-mentioned problem can be solved if the images obtained sequentially in time are recorded as they are on a video tape recorder or the like, but then real-time performance is lost. This invention improves the ability to operate on images of objects moving at high speed and easily freeze them at a desired time phase without sacrificing real-time performance.
The purpose is to provide an ultrasonic diagnostic device.

[Means to solve the problem]

The ultrasonic diagnostic apparatus according to the present invention includes a means for transmitting ultrasonic waves into a subject, a means for receiving ultrasonic waves from within the subject, a means for forming an image f1 from a received signal, and a sampling time line. A storage means for storing images sequentially obtained from the present time up to multiple sampling points before the present time, and an image storage means for storing images sequentially obtained from the present time up to multiple sampling points before, and an image freezing operation at an arbitrary point in time allows the operation of the image storage means to be stored at that point in time. It is characterized in that it has means for ending the sampling period after a plurality of sampling periods and fixing the stored contents.

[1t] An image storage means capable of storing multiple images is provided, so that the image storage means that can store multiple images at any time, such as images acquired at multiple sampling points just before the current time, is always stored. Stored. When the operator performs a freeze operation at an arbitrary point, the image storage operation continues from that point until the multiple sampling period, and when multiple images are stored from that point on, the image storage operation is terminated. The memory contents are fixed. That is, a plurality of images obtained at several sampling points before and after the operator's freeze operation are stored and fixed. Therefore, even if the operator's operation is a little late or, conversely, a little too early, the memorization of several strokes before and after the time of the operation is performed, and if you select from among them, you will be able to get the desired result. It is possible to obtain temporal images. [Embodiment] The figure shows an embodiment of the present invention, and in this figure, an ultrasonic transducer 2 is brought into close contact with the surface of a subject (patient's body) 1. A pulsed ultrasonic driving signal is sent to the ultrasonic transducer 2 from a wave transmitting circuit 3, and ultrasonic waves are transmitted into the subject 1. The reflected wave that returns when this ultrasonic wave is reflected within the subject 1 is received by the transducer 2, and the received signal is transmitted to the receiving circuit 4.
An image signal is obtained. This image signal is sent to the image display device 5 and displayed on its display screen. Therefore, pulsed ultrasonic wave transmission and reception are repeated every short sampling period to obtain a sequential side image, which is displayed on the image display device 5.
If you display it as , a video-like image will be displayed. On the other hand, the image signal from the wave receiving circuit 4 is sent not only to the image display device 5, but also to the Digimol drawing memory 6, which can store a plurality of images. In this image memory 6, for example, one image (an image at a certain point in time is stored in the turtle memory, and when a new image is obtained at the next point in time, this stored image is transferred to the next image). By using a sequential feed method similar to a shift register, in which the new image is sent to the image memory and stored, each of the two image memories for multiple images always stores one image up to a little earlier than the current time. The wholesale circuit 7 controls the loading and reading of this picture 1 in the memory 6, and when the freeze button is pressed by the operator at any time, multiple copies of the picture are stored from that point. After a new image is stored, a write prohibition signal is issued. Therefore, several images before and after the time when the freeze button was pressed are stored in this image memory 6, and are fixed as they are. When the operator presses the freeze button, the video-like image displayed on the image display device 5 at that point is frozen and displayed as a still image, and several still images before and after that point stored in the image memory 6 are also displayed. are read out one after another and displayed one by one, and you can select the one at the desired time. Therefore, even if the timing of pressing the freeze button is slightly off, the still image at the desired time phase will be displayed. can be displayed on the image display device 5 in real time. [Effects of the Invention] According to the ultrasonic diagnostic apparatus of the present invention, it is possible to easily display an image in a desired time phase even when a subject is moving at high speed. You can freeze it and get a still image in real time.

[Brief explanation of drawings]

The figure is a block diagram of an embodiment of the present invention. 1... Subject, 2... Ultrasonic transducer,
3... Wave transmitting circuit, 4... Wave receiving circuit, 5... Image display device, 6... Image memory, 7... System (wholesale circuit).

Claims (1)

[Claims] (1) A means for transmitting ultrasonic waves into the object, a means for receiving ultrasonic waves from within the object, a means for composing an image from the received signals, and an image sequentially obtained at each sampling time. Image storage means for a plurality of images is stored from the present time up to a plurality of sampling times before, and the storage operation of the image storage means is ended after a plurality of sampling periods from that point by an image freeze operation at an arbitrary time point, and the stored contents are fixed. 1. An ultrasonic diagnostic apparatus comprising: a means for converting.