JP2617259B2 - Ultrasonic image forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic image forming apparatus,
In particular, the present invention relates to an ultrasonic image forming apparatus capable of displaying a displacement of a tissue in a subject simultaneously with a tissue tomographic image.

[0002]

2. Description of the Related Art Conventionally, there has been known an ultrasonic image forming apparatus which radiates an ultrasonic pulse into a subject at a predetermined repetition cycle and forms a tomographic image in the subject by a reflected echo signal. In addition, an ultrasonic pulse is emitted into the subject at a predetermined repetition cycle, and the reflected echo signal is closely related to the hardness of the tissue and the amount of displacement of the tissue which is important in knowing the property of the tissue is imaged. There is a known ultrasonic image forming apparatus. Further, there is known an ultrasonic image forming apparatus which emits an ultrasonic pulse into a subject at a predetermined repetition cycle and images a blood flow velocity distribution image by a reflected echo signal.

[0003]

An ultrasonic image forming apparatus that simultaneously displays a tomographic image in a subject and a blood flow velocity distribution image has been proposed, but the tomographic image in the subject and the amount of tissue displacement are present. Or, there is no ultrasonic image forming apparatus that simultaneously displays the tomographic image in the subject, the blood flow velocity distribution image, and the displacement amount of the tissue, and there is no tomographic image in the subject and the displacement amount of the tissue, or the tomographic image in the subject. There is a need for an ultrasonic image forming apparatus that simultaneously displays an image, a blood flow velocity distribution image, and a tissue displacement amount.

SUMMARY OF THE INVENTION The present invention has been made in order to meet the above-mentioned demands, and has been made in consideration of a displacement amount of a tomographic image and a tissue in a subject or a tomographic image, a blood flow velocity distribution image and a displacement of a tissue in a subject. It is an object of the present invention to provide an ultrasonic image forming apparatus that simultaneously displays an amount and an amount.

[0005]

An ultrasonic image forming apparatus according to the present invention includes a tomographic image display for imaging a tomographic image in a subject based on a reflected echo signal, and a displacement of a tissue based on the reflected echo signal. Imaging, according to the direction and magnitude of displacement
Tissue displacement indicator to change screen display and tissue displacement
A region of interest setting device for setting the region to be indicated, and a region of interest setting
To display tissue displacement in the area set by the scale
Select the output of the tissue displacement indicator in that area
Selecting means for displaying the tomographic image in the subject and the displacement amount of the tissue at the same time.

A tomographic image display for imaging a tomographic image in a subject based on a reflected echo signal, a blood flow display for imaging a blood flow velocity distribution image based on a reflected echo signal, A tissue displacement indicator that changes the screen display according to the direction and magnitude of the displacement, images a tissue displacement based on the displacement, a region of interest setting device that sets a region where the tissue displacement is displayed, and a region of interest setting device. Selecting means for selecting the output of the tissue displacement indicator in that region to display the tissue displacement in the region, and the output of the blood flow indicator or
And a characteristic converting unit for changing and displaying the display characteristics of the tissue displacement display, wherein a tomographic image, a blood flow velocity distribution image, and a tissue displacement amount in the subject are simultaneously displayed.

[0007]

According to the above configuration, the ultrasonic image forming apparatus according to the present invention provides a structure in which the direction of tissue displacement and the
The tissue displacement is displayed while changing the screen display according to the size.
Can be shown .

[0008] The ultrasonic imaging apparatus of the present invention, a screen display of the screen display and tissue displacement of the blood flow velocity distribution image
Can be displayed differently .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of an ultrasonic image forming apparatus according to the present invention. Ultrasonic image forming device 1
0 has an ultrasonic diagnostic apparatus 12 that radiates ultrasonic pulses into the subject at a predetermined repetition cycle and obtains a tomographic image or the like in the subject based on the reflected echo signal, as shown in FIG. , The ultrasonic diagnostic apparatus 12 has three memories 14, 1
6 and 18 and the cycle controller 20 are connected, and the cycle controller 20 is connected to the memories 14, 16 and 18.
The memories 14, 16, 18 are connected to a tissue displacement color display 22 that determines a color to be displayed based on the amount of tissue displacement.
D / A converters 24, 26 and 28 are connected for each of the G and B signals, and a color display 30 composed of a color cathode ray tube is connected to the D / A converters 24, 26 and 28.

The tissue displacement color display 22 is shown in FIG.
As shown in detail in FIG. 1, a tomographic image display 32 for imaging a tomographic image in a subject based on a reflected echo signal is provided. 36 are connected. Then, the tomographic image display 32
The adder 38 is connected to the g output of the tomographic image display 32 via a switch 34b.
The adder 40 is connected via 4c.

Further, the tissue displacement color display 22 has a blood flow display 42 for imaging a blood flow velocity distribution image based on the reflected echo signal, and a switch 34d is connected to the r output of the blood flow display 42. Is connected to the adder 36 via. An adder 38 is connected to the g output of the blood flow indicator 42 via a switch 34e.
The output is connected to an adder 40 via a switch 34f.

The tissue displacement color display 22 has a tissue displacement indicator 44 for imaging the displacement of the tissue based on the reflected echo signal. The tissue displacement indicator 44 has a region of interest such as a trackball. A region-of-interest setting device 46 that sets a (ROI) and outputs a control signal indicating the tissue displacement only in that region is connected. Further, the output r of the tissue displacement display 44 is added to the adder 3 via the switch 34g.
6, the adder 38 is connected to the g output of the tissue displacement indicator 44 via the switch 34h,
The adder 40 is connected to the output b of the tissue displacement indicator 44 via a switch 34i. The output of the adder 36 is an R output, the output of the adder 38 is a G output,
Is the B output.

The tissue displacement color display 22 is provided with a switch for controlling when the color display of the displacement and the tomographic image are switched according to the magnitude of the displacement amount or when the display of the tomographic image and the displacement are displayed in a superimposed manner. It has a display image switch 48 as a selection means for outputting a switching signal and a characteristic conversion means, and the display image switch 48 is provided with switches 34a-34.
i is switched.

As shown in FIG. 3, the tissue displacement display 44 has a ROM 50 for determining a color according to the magnitude of the displacement of the tissue displacement signal 102. The ROM 50 includes a red converter and a blue converter. Calculator 5 consisting of a color converter and a green color converter
2, and a luminance calculator 54 composed of three multipliers for adjusting the luminance.

Next, the operation of this embodiment will be described.

The ultrasonic diagnostic apparatus 12 emits an ultrasonic pulse into the subject at a predetermined repetition cycle, receives a reflected echo signal, and, based on the signal, receives a B-mode tomographic image signal 1.
In addition to outputting a blood flow signal 101 and a tissue displacement signal 102, a clock pulse and an address signal 103 of an ultrasonic beam are output to the cycle controller 20. Then, the B-mode tomographic image signal 100 is stored in the memory 14, the blood flow signal 101 is stored in the memory 16, and the tissue displacement signal 102 is stored in the memory 18,
The cycle controller 20 generates a synchronization signal 104 necessary for controlling and displaying the memory.

The synchronization signal 1 from the cycle controller 20
04, the memories 14, 16, 18 at predetermined timing.
The B-mode tomographic image signal 100, blood flow signal 101, and tissue displacement signal 102 stored in the
2 is read. Then, the tissue displacement color indicator 2
2 converts the B-mode tomographic image signal 100, the blood flow signal 101, and the tissue displacement signal 102 into RGB color image signals,
An RGB signal obtained by adding a blood flow velocity distribution image or tissue displacement to the tomographic image signal is output. At this time, the display image switch 4
Reference numeral 8 is used to switch the switches 34a to 34i so as to perform various displays, which will be described later, based on a setting signal and a preset threshold.

Further, the RGB signals output from the tissue displacement color display 22 are converted into analog signals by the D / A converters 24, 26 and 28 and displayed on the color display 30.

Here, an example of display performed by the tissue displacement color display 22 will be described.

(1) As shown in FIG. 4, a region of interest (ROI) is set in the monochrome tomographic image, and the displacement of the region of interest is displayed in correspondence with the color bar shown in FIG. In the region of interest (ROI), a blood flow velocity distribution image or a tissue displacement image is displayed in color (in FIG. 4, a tissue displacement image is displayed). As for the color scheme, the displacement in the approaching direction is displayed in red, the displacement in the moving away direction is displayed in blue, and the magnitude of the displacement is changed to luminance for display.

(2) A blood flow velocity distribution image is displayed in color in a black-and-white tomographic image, a region of interest (ROI) is set in this image, and a displacement image of a tissue is shown in a color bar shown in FIG. Is displayed in color corresponding to.

(3) A threshold value for the amount of tissue displacement is set, and FIG.
As shown in (1), the tomographic image is displayed in black and white below the threshold, and the displacement image of the tissue is displayed in color above the threshold. It is also possible to display a tomographic image in color and a tissue displacement image in black and white.

(4) A blood flow velocity distribution image is displayed in red and blue colors in a monochrome tomographic image, and a tissue displacement image is displayed in red purple and blue purple.

(5) A blood flow velocity distribution image is displayed in red and blue colors in a black-and-white tomographic image, and the place where the tissue is displaced is displayed in a diagonal line or grid pattern as shown in FIG. , And the density of the grating is displayed in high proportion to the magnitude of the displacement.

[0026]

As described above, according to the present invention,
In the region of interest, depending on the direction and magnitude of tissue displacement
Since it is configured to display the tissue displacement while changing the screen display Te, be displayed and displacement of the tissue and a tomographic image of the subject at the same time, it is possible to easily visually recognize the distribution of the displacement of the tissue .

According to the present invention, the blood flow velocity distribution image
The screen display and the screen display of tissue displacement are displayed differently.
Possible to the, be displayed tomogram and displacement of the blood flow velocity distribution image with tissue in the subject at the same time, it is possible to easily visually recognize the distribution of the displacement of the tissue.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an ultrasonic image forming apparatus according to the present invention.

FIG. 2 is a circuit diagram showing a configuration of a tissue displacement color display according to the present invention.

FIG. 3 is a circuit diagram showing a configuration of a tissue displacement indicator according to the present invention.

FIG. 4 is a diagram showing a display example according to the present invention.

FIG. 5 is a diagram showing a displacement color bar.

FIG. 6 is a diagram showing another display example according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ultrasonic image forming apparatus 22 Tissue displacement color display 32 Tomographic image display 42 Blood flow display 44 Tissue displacement display 48 Display image switch

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-275045 (JP, A) JP-A-62-180393 (JP, A) JP-A-63-151107 (JP, U)

Claims (2)

(57) [Claims] 1. An ultrasonic image forming apparatus which emits an ultrasonic pulse into a subject at a predetermined repetition cycle and images a tomographic image or the like in the subject by a reflected echo signal thereof. A tomographic image display for imaging a tomographic image in the subject, a tissue displacement display for imaging a displacement of the tissue based on the reflected echo signal, and changing a screen display according to the direction and magnitude of the displacement; A region-of-interest setting device for setting an area in which displacement is displayed; and selecting means for selecting an output of the tissue displacement display in the region to display the tissue displacement in the region set by the region-of-interest setting device. An ultrasonic image forming apparatus, comprising: displaying a tomographic image in a subject and a displacement amount of a tissue at the same time. 2. An ultrasonic image forming apparatus which emits an ultrasonic pulse into a subject at a predetermined repetition cycle and images a tomographic image or the like in the subject by a reflected echo signal of the subject. A tomographic image display that images a tomographic image in the subject, a blood flow display that images a blood flow velocity distribution image based on the reflected echo signal, and an image of tissue displacement based on the reflected echo signal, A tissue displacement display that changes the screen display according to the direction and magnitude of the displacement, a region of interest setting device that sets an area where the tissue displacement is displayed, and the tissue displacement in an area set by the region of interest setting device Selecting means for selecting an output of the tissue displacement indicator in the area to display the output of the tissue flow indicator or a display feature of the tissue displacement indicator.
An ultrasonic image forming apparatus, comprising: a characteristic conversion unit configured to display a tomographic image, a blood flow velocity distribution image, and a tissue displacement amount in a subject at the same time.