JPS5841538A - Local part enlargement display system of 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 The present invention relates to a local enlargement display method for an ultrasonic diagnostic apparatus that specifies a locally enlarged portion in a display box and enlarges and displays the specified portion by increasing the scanning line density and sample rate. It is.

Conventional ultrasound diagnostic equipment scans a living body in a fan (1) shape with an ultrasound beam from a transmitter via a transducer, receives and polarizes the reflected waves of each scanning line with a receiver, and transmits the waves from a distance. The reflected wave machine has been subjected to 8TC (Sensitivity Time Control) processing which gives a high amplification factor.
G amplify and perform envelope detection at the specified period to generate 11 μm/
Digital tomographic data is obtained by D conversion and stored in the iki image memory. Based on the contents of this image memory O, the entire or local tomographic image is selected and displayed for diagnosis. In this case, display screen U1i111 128 lines or 256 lines
It is displayed as a sector (cm) display with a scanning edge the size of a book, and only scales of about 1 and 275.1/2 times are available. This is considered to be due to the fact that conventional ultrasonic diagnosis has focused on a relatively wide range of Ho function diagnosis of living body Ii#I organs442). In response to this, it has been desired that this display screen also have a function of enlarging and displaying the local area designated by the diagnostician.

J on the display screen of the ultrasonic diagnostic equipment
It is an object of the present invention to provide a local enlargement display method for enlarging and displaying part i6 by n degrees.

In order to achieve the above object, the local magnification table (2) method of the present invention transmits ultrasonic waves to a diagnostic object and receives reflected waves,
In an ultrasonic diagnostic apparatus that displays image data on a screen according to contents stored in an image memory, means for specifying a locally enlarged portion in the display screen, and means for increasing the scanning line density and sample rate of the specified portion by the specification. The specified portion is enlarged and displayed.

The present invention will be described in detail below with reference to examples.

FIGS. 1(A) and 1(b) are explanatory diagrams of an example of the display screen in the diagnostic procedure of this @mei.

(Lotus in the same figure) is the oTlkj surface 10 sekume run before expansion of the present invention.
2, 256 scanning lines are sequentially sent out in a fan shape, and a 512 sample period is provided in the valley scan. Then, the diagnostician uses a light ben or the like to specify the position (X, Y) of the enlarged portion 3. Furthermore, if the distance and direction are multiplied by n as an enlarged scale, the range 3 of 256 scanning lines and 1 scanning M512/n sample will be 256 scanning lines in 1# direction 1 as shown in the same figure (b). Book, 1 scan armpit 512 samples range 5'
Therefore, both the running density and the sampling rate increase by n times in this enlarged area.

(5) be.

In the same figure, the drive voltage from the transmitter 11 is ? Drives 120 vibrators, for example 2.5MH
z-&5MHz ultrasonic pulses are generated and sent to predetermined organs of the living body. Receive reflected waves reflected from living bodies! ! 15 performs 8TC processing to amplify the reflected wave machine amplification factor from the reception 1 filter, and further amplifies it with the LOG amplifier 11 so that the luminance changes visually smoothly. Next, the reflected wave pulse is sent to the detector 15. 11 Perform flow envelope line detection. This package 1
The 11-line waveform is A/D converted by an A/D converter 16) at a specified period and at a specified cycle to obtain digital tomographic data.

This digital data is stored in the jiIigR memory 17.
/% This is printed out and displayed on the display 18.

Next, use the light ben 19 on the display-17 screen as shown in Figure #11-) to enlarge the area 5
Specify. This designation is inputted by the light ben 19 and stored in the t-xy coordinate storage memory (4) 20 of the point's X and Y coordinates. Further, a slightly enlarged scale nt-scale is stored in the scale storage memory 25 using the numeric keypad 24. and,
The contents of the XY coordinate storage memory 10 are read to the sample start/stop circuit 20 - the sample start and stop positions It(XY) of the enlarged portion are determined and supplied to the A/D converter 16.

At the same time, an enlarged scale corresponding to this enlarged portion is extracted from the scale storage memory 25 and supplied to the A/D converter 16 via the sample period circuit 22, and the sample period between sample start and stop is changed by 1/n K. do.

On the other hand, in order to make changes in the enlarged part with respect to the scanning of the transducer t12, the contents of the XY seated image storage memory 2o are sequentially read out, and the scanning start and stop positions of the enlarged part are changed via the scanning start/stop circuit 25. is given to the transducer 12, and in relation to this position, 7 enlarged ''-'1''-'' is stored) A switching control signal is supplied to the transducer t12.

When the transducer 212C) scan reaches the enlarged part (5) 50 of FIG. By multiplying each S/Glue rate by n, a range 5' of 256 scanning lines and 11,512 S/Glue per scanning is obtained, as shown in FIG. 1, and an n-fold enlarged display is obtained.

As described above, according to the present invention, a local enlarged portion of Display-Rain O is specified, and the scan IiI density and sample rate of the wrinkle specified portion are increased to display the enlarged portion. This method improves both azimuth and distance resolution compared to ordinary simple magnification methods, and enables images to be enlarged and displayed with high precision.) It is compatible with the diagnostic procedure of the subject and improves diagnostic accuracy. It is useful for

[Brief explanation of the drawing]

1lE1 Figure (&), (b) Line Example 01 of the display screen in the diagnostic procedure of the present invention Screen, 2 is sector, 5. s' Hiro enlarged part, 11 Hiro transmitter, 12 Hiroto Kunsudaete, 15 is receiver 1, 14 is LOG (6) amplifier, 15 is envelope detector, 16 is A/D converter, 1
7 is image memo IJ, 18a display, 19 is light ben,
20 is an XY coordinate storage memory, 21 is a sample start/stop circuit, 22 is a sample period circuit, 23 is an enlarged scan start/stop circuit, 24 is a numeric keypad, 25 is a line scale storage memo + 7.
26a shows the scanning direction control circuit. Patent applicant Fujitsu Ltd. Sub-agent Patent attorney 1) Yoshishige Saka (7)

Claims (1)

[Claims] In an ultrasonic diagnostic apparatus that transmits ultrasonic waves into a diagnostic target, receives reflected waves, stores image data in an image memory, and displays the content on a screen, a means for specifying a locally enlarged part in a display-play; 1. A local enlargement display method for an ultrasonic diagnostic apparatus It, comprising means for increasing the scanning line density and sample rate of a specified portion according to specification, and enlarging and displaying the specified portion.