WO2005122906A1 - 超音波診断装置 - Google Patents
超音波診断装置 Download PDFInfo
- Publication number
- WO2005122906A1 WO2005122906A1 PCT/JP2005/011032 JP2005011032W WO2005122906A1 WO 2005122906 A1 WO2005122906 A1 WO 2005122906A1 JP 2005011032 W JP2005011032 W JP 2005011032W WO 2005122906 A1 WO2005122906 A1 WO 2005122906A1
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- WIPO (PCT)
- Prior art keywords
- hue
- distortion
- diagnostic apparatus
- ultrasonic diagnostic
- color
- Prior art date
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52053—Display arrangements
- G01S7/52057—Cathode ray tube displays
- G01S7/52071—Multicolour displays; using colour coding; Optimising colour or information content in displays, e.g. parametric imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52023—Details of receivers
- G01S7/52036—Details of receivers using analysis of echo signal for target characterisation
- G01S7/52042—Details of receivers using analysis of echo signal for target characterisation determining elastic properties of the propagation medium or of the reflective target
Definitions
- the present invention relates to an ultrasonic diagnostic apparatus, and more particularly, to an ultrasonic diagnostic apparatus that performs medical diagnosis by imaging distortion information of an organ in a living body.
- An ultrasonic diagnostic apparatus transmits an ultrasonic wave into a subject, detects an echo reflected from a living tissue, and images and displays the signal.
- the displayed image is a tomographic image showing tissue properties in the living body measured almost in real time by contacting the ultrasonic probe to the subject, blood flow in the living body measured using the Doppler effect, and the like. It is an image showing the movement of an organ.
- an ultrasonic diagnostic apparatus when displaying an image of the blood flow and the movement of an organ in a living body, a sectional image is used as a background image in monochrome, and the blood flow and the movement of the organ are displayed in color on a monitor. ing. When performing this display, it is common to assign different hues to the measurement data of blood flow and organs according to the moving speed, and a color bar of the assigned hues is displayed in the corner of the monitor screen. Things have been done.
- an ultrasonic diagnostic apparatus correlates images measured at different times and measures the amount of movement of the living tissue during that time, for example, the amount of distortion of the living tissue from the displacement, or calculates the amount of displacement of the living tissue.
- Technology for measuring the elastic modulus of a living tissue by artificially applying a pressure change from the outside, and displaying the image on a monitor by image processing is being developed. (See Patent Document 1 and Patent Document 2)
- An imaging technique for measuring the amount of strain of the living tissue and the elastic modulus of the living tissue using ultrasonic waves and displaying the result as an image is referred to as an ultrasonic tissue elasticity imaging method (ultrasonic elastography).
- ultrasonic tissue elasticity imaging method ultrasonic elastography
- red, blue, and other hue information are added to the measurement data in accordance with the measured amount of distortion and the value of the elastic modulus.
- hardened parts such as cancer and tumors are displayed on a monitor with hue information that can be distinguished from other tissues.
- Patent Document 3 for example.
- the hardness of cancer or tumor tissue in a living body depends on the region and individual, and furthermore, the progress of the disease.
- the measured data of the amount of strain and the elastic modulus are converted into three hues of light, for example, R (red), G (green), and B (blue), into red, with a linear gradation of hue.
- R red
- G green
- B blue
- Patent Document 1 USP 5,107,837
- Patent Document 2 JP-A-5-313713
- Patent Document 3 JP-A-2000-60853
- Patent Document 4 WO 2005/048847
- an affected part such as a cancer or a tumor, which is harder than a normal surrounding tissue
- a monitor so as to be distinguishable from the surrounding fibrous tissue based on hue information. Since the bar is also displayed on the monitor, the doctor can recognize from the hue information that the affected part is a part harder than the surrounding fibrous tissue. However, the doctor was unable to quantitatively recognize how hard the displayed tissue was compared to the surrounding tissue.
- the hue of the color bar is displayed with a gradation, even if a doctor can specify the hue of a site of interest in a distorted image to which hue information has been added, the hue is not They spend a lot of time trying to determine where they fit in the bar, which reduces diagnostic efficiency.
- the present invention enables a physician to observe a strain image or an elastic modulus image with more quantitativeness as compared with conventional techniques, and to improve the diagnostic efficiency of the diseased part. It is an object of the present invention to provide an ultrasonic diagnostic apparatus capable of improving the performance.
- the present invention provides an in vivo living body measured by ultrasonic waves.
- an ultrasonic diagnostic apparatus that displays a color image together with a color bar of hue information to be applied on a color monitor, the average value of the strain measured adjacent to the color bar or A means for displaying at least one piece of comparison information corresponding to the hue corresponding to the hue.
- the present invention provides a method for inputting a specific hue to a force on a distorted image displayed on a color monitor to the ultrasonic diagnostic apparatus. On a color bar, and a means for displaying comparison information of the specified phase information with respect to the average value or the maximum value of the distortion is added.
- FIG. 1 is a block diagram showing an overall configuration of an ultrasonic diagnostic apparatus according to one embodiment of the present invention.
- FIG. 2 is a diagram showing a first screen display mode and details of a color bar according to the present invention.
- FIG. 3 is a first embodiment showing a relationship between distortion and hue information according to the present invention.
- FIG. 4 is a diagram illustrating a second embodiment of the present invention showing the relationship between distortion and hue information, and a method for realizing it.
- FIG. 5 is a third embodiment illustrating the relationship between distortion and hue information according to the present invention.
- FIG. 6 is a fourth embodiment illustrating a relationship between distortion and hue information according to the present invention.
- FIG. 7 is a fifth embodiment illustrating the relationship between distortion and hue information according to the present invention.
- FIG. 8 is a diagram illustrating an embodiment in which a hue is specified from position information on a screen in the present invention.
- an ultrasonic diagnostic apparatus to which the present invention has been applied comes into contact with a subject 101, transmits an ultrasonic beam to the subject 101, and reflects an ultrasonic beam reflected in the body of the subject 101.
- the ultrasonic transmission / reception unit 103 having a phasing addition circuit for forming and outputting an ultrasonic beam signal (RF signal data) by performing phasing addition processing of the output echo signal, and the phasing addition
- a first image forming unit 104 that forms a tomographic image of a cross section of the subject 101 with which the ultrasonic probe 102 is in contact using the RF signal data output from the circuit, for example, a black and white tomographic image, and the RF signal data
- Force A distortion calculator 105 that measures the displacement of the tissue of the subject 101 and calculates strain data (which may be referred to as elasticity data), and forms a color distortion image or a color elasticity image based on the distortion data or elasticity data.
- a second image composing unit 106 an image synthesizing unit 107 for synthesizing the black-and-white tomographic image and the color distortion image to generate a single image, a color monitor 108 for displaying the synthesized image, and a display on the color monitor 108.
- Color scale color bar
- a scale configuration unit 110 a control unit (CPU) 11 for controlling the components, a keyboard and operation keys for inputting various commands to the CPU 111, and an operation panel 112 equipped with a mouse, joystick or trackball.
- the echo signal After being amplified, the echo signal is subjected to dynamic focusing processing in the transmission direction by the phasing addition circuit. By this processing, an ultrasonic beam signal is formed.
- This ultrasonic beam signal is processed by a gain correction unit, a logarithmic compression unit, a detection unit, a contour enhancement unit, and a filter unit provided in the first image forming unit 104 to perform gain correction, logarithmic compression, detection, contour enhancement, and dynamic filtering processing. And so on.
- the processed signal is input to the first image forming unit 104 and also to the distortion calculating unit 105.
- the above-described ultrasonic transmission / reception operation is performed by changing the transmission / reception direction under the control of the CPU 111 to one end of the preset ultrasonic measurement field of view.
- image data of a cross section of the inside of the subject contacted with the ultrasonic probe 102 is obtained, and the image data is obtained.
- the data is written to a storage medium in the first image forming unit 104 generally called a black and white scan converter, for example, a frame memory or a cine memory, and a tomographic image is formed.
- the ultrasonic scan is repeatedly performed at a predetermined time interval (frame rate), and a plurality of images are recorded in the frame memory or the cine memory in units of frames using the ultrasonic beam signal obtained in each ultrasonic transmission / reception cycle.
- the image data stored in the frame memory or the like is sequentially read (scan-converted) at the timing of a display synchronization signal, for example, a horizontal synchronization signal, of the color monitor 108 irrelevant to the transmission and reception of ultrasonic waves, and is subjected to color conversion.
- a display synchronization signal for example, a horizontal synchronization signal
- the ultrasonic beam signal obtained by the ultrasonic transmission / reception or the ultrasonic scan is input to the distortion calculation unit 105, and the distortion calculation is performed as described below.
- the CPU 111 instructs the distortion calculator 105 to output the ultrasonic beam signal of the N-th scan.
- an ultrasonic beam signal of the (N + n) -th scan is subjected to correlation processing.
- the correlation processing is a method of calculating a one-dimensional correlation between ultrasonic beam signals in the same direction in the N-th scan and the (N + n) -th scan by using a plurality of ultrasonic beams constituting frame data. Either the method applied to each ultrasonic beam signal, or the method applying a two-dimensional correlation between the frame data of the Nth scan and the frame data of the (N + n) th scan May be used.
- the block matching method divides an image into a plurality of blocks, for example, using MXM pixels as one block, and most closely approximates a certain block of interest in the image obtained by the (N + n) th scan. Search for blocks in the image obtained by the Nth scan. And between those blocks Detects the direction and how much it has moved over time. By performing this multiple times while changing the block of interest, displacement data in block units can be obtained. The displacement of each pixel constituting the image is estimated and calculated using the displacement data in block units. As a result, a displacement data distribution of each pixel is obtained. Then, distortion image data is obtained by spatially differentiating the displacement data distribution in the distortion calculation unit 105.
- the obtained distorted image data is sent to image synthesizing section 107.
- the tomographic image data obtained in the (N + n) -th scan is also supplied to the image synthesizing unit 107, and the tomographic image obtained in the (N + n) -th scan is also supplied to the image synthesizing unit 107.
- the data and the distorted image data calculated between the measurement data of the Nth and (N + n) th scans are combined with the pixel addresses of the image data of the forces to match.
- the purpose of this image synthesis is to observe the distortion state of the organ or tissue of the living body in relation to the surrounding organs or tissues, so that the distortion image data of the organ or tissue that the observer pays attention to is tomographic image data. It is desirable that the distorted image data be displayed with a hue of R (red) to G (green) to B (blue) so that the observer can easily recognize the image.
- the second image forming unit 107 includes a gradation unit for gradation input signals and a color monitor 108 for storing the image data and displaying the stored image data.
- a color scan converter for reading out in response to the display synchronization signal.
- the distorted image data output from the distortion calculation unit 105 is converted into an 8-bit signal (256 steps) by a gradation unit in order to allocate the data to 256 gradations, and these signals are converted by a color scan comparator. Output to a single device.
- the color scan converter is provided with a color encoder and a frame memory.
- the 8-bit distorted image data output from the gradation converter and input to the color encoder is used to determine the relationship between the preset gradation and hue. Corresponding R (red) to G (green) to B (blue) hues are added and written to the frame memory. Then, the CPU 111 reads out the contents of the frame memory of the monochrome scan converter and the contents of the frame memory of the color scan converter in association with the addresses, and outputs them to the image synthesizing unit 107. As a result, the color distortion image and the black-and-white tomographic image are combined and displayed on the screen of the color monitor 108.
- a color bar 205 indicating the relationship between the gradation of the distorted image data and the hue is displayed.
- An example of the color bar 205 is shown in FIG. 2 from the top to the bottom of the screen from red (Red), yellow (Yellow), green (Green), light blue (Light Blue), and blue (Blue). It changes with gradation.
- the relationship between the distorted image data and the hue is that the red code is used for the part where the measured distortion is large (soft part), and the blue code is used for the part where the measured distortion is small! / And the part (hard and part). Is assigned. In a region where the distortion is approximately the average value ( ⁇ ), a green code is assigned. In addition, the strain is equal to or higher than the average value ( ⁇
- the color is yellow between red and green, and the distortion is below the average ( ⁇ X 1 / Y
- a light blue color between green and blue is assigned.
- the distortion image is colored by the above-mentioned assignment of the distortion and the hue. Note that, above the red end of the color bar 205, “soft” is shown to indicate that red is a tissue force ⁇ soft, and under the blue end, the tissue is “hard”. Is displayed as "hard”.
- the color bar 205 includes the color scale configuration unit 110. That is, the color scale configuration unit 110 includes a display memory (not shown) for displaying the color bar 205 on the screen of the color display monitor 108. The color bar 205 is displayed by writing data for displaying the color bar to a predetermined address area outside the ultrasonic image display area of the display memory. Note that the display memory for displaying the color bar 205 may be provided for exclusive use, or a character memory and a graphic memory for displaying the ID of the subject may be shared.
- an ultrasonic tomographic image 201 is displayed, and the ultrasonic tomographic image 201 and a distortion image including the affected part 203 are displayed in a superimposed manner.
- the distortion image is measured for a region of interest (ROI) 202 set in advance on the tomographic image.
- ROI region of interest
- the distortion 202 is set by an operator operating a ROI input operation device provided on the keyboard 112, for example, a trackball or a mouse.
- the CPU 111 calculates the distribution of the distortion value in the ROI 202 by the above method. Next, the CPU 111 calculates the distortion value in the ROI 202 to calculate the total amount of the distortion value in the ROI 202. Then, the total amount of the distortion values is divided by the number of pixels in the ROI 202 to calculate an average value ( ⁇ ) of the distortion values in the ROI 202. Then, the average value ( ⁇ ) of the distortion values is changed from red to green
- the minimum value of the distortion value ( ⁇ ) is assigned to the color blue. That is, in the first display mode, the average value ( ⁇ ) of the distortion value in R R202 from the minimum value ( ⁇ ) to the maximum value ( ⁇ ) is centered.
- the hue is given to the distortion value so that the blue force changes linearly to red. If the color bar 205 is displayed only adjacent to the image, it is difficult for the inspector to compare the relative amount of distortion between the hues, so that the representative hue of the color bar 205, for example, the average of the distortion values Green representing the value ( ⁇ ), the mean value between the maximum and average of the distortion values (3/2 ⁇ or 3 /
- the comparative values are displayed for the three light blue points.
- the median value between the maximum value and the average value of the distortion values shown in yellow and the light blue color showing the intermediate value between the minimum value and the average value of the distortion values shown in light blue are the average values of the distortion values
- Figure 3 shows the ratio to ( ⁇ ).
- the range between the maximum value ( ⁇ ) and the minimum value ( ⁇ ) of the distortion value calculated by the distortion calculation unit 105 under the control of the CPU 111 is 256 (0 to 0). 255, or 1-256)
- the maximum value ( ⁇ ) is 256 or 255)
- the minimum value ( ⁇ ) is 1 or 0)
- the average value ( ⁇ ) is 128 (or 127), and the median value between the maximum value and the average value (3/2 ⁇ or 3/4
- ⁇ 192 (or 191), and the median between the average and the minimum (1/2 ⁇ or 1/4 ⁇ ) is 64 (or
- these numerical values are displayed at a point attached to the corresponding position of the color bar 205 or at a position adjacent to the bar-shaped mark 206.
- the mark be attached so that the color and the mark correspond to each other, as in the color bar 205, so that the color inside the color bar 205 is not erased!
- the maximum value ( ⁇ ) is 2 ⁇
- the minimum value ( ⁇ ) is 0, and the maximum and average
- the mean value is 1.5 ⁇ , and the mean value between the mean and the minimum is 0.5 ⁇ .
- the inspector can determine a region of interest in the distorted image where the distortion is most likely to occur or an average distortion. You can easily understand how hard, soft, or soft the part with
- the above-described display form of the color bar is an example in which the hue is linearly converted between the maximum value and the minimum value of the distortion, but the present invention is not limited to this.
- the present invention includes non-linear hue conversion between the maximum value and the minimum value of the distortion.
- FIG. 4 shows a second display mode of the present invention.
- This second display mode is suitable for extracting a change in strain in a relatively hard part (a part having a small strain) in the body with a fine hue change from blue to green. That is, in the second display mode, as shown in FIG. 4, the maximum value of the measured distortion ( ⁇ ) is assigned to red, and the minimum value of the distortion ( ⁇ ) is assigned to blue.
- the minimum distortion value ⁇ _ is changed to the maximum distortion value ⁇ in the first display mode. Is displayed to change linearly from blue to red, but in the second display format
- the hue change is magnified in a portion having a small distortion, and the hue change is reduced in a portion having a small distortion.
- this second display mode it is preferable to display a comparative numerical value next to the color bar 205 in the same manner as in the first display mode.
- the second display mode it is difficult to adopt the first display mode in which the reference value of the comparative numerical value is the average value ⁇ of the distortion, so that the reference value of the comparative numerical value is set to the distortion value.
- Fig. 3 shows an example of displaying comparative values using this method, where it is desirable to set the maximum value ⁇ .
- the comparison value is obtained by calculating with the CPU based on the above relationship, ⁇ is next to the red color bar 205, 5/8 ⁇ next to the yellow, 1/4 ⁇ next to the green, and water
- This second display mode may be implemented alone, but here, the state in which the distorted image and the color bar according to the standard display mode are displayed on the monitor screen is the color bar of the second display mode.
- a description will be given of a case where the display can be switched.
- a color bar change key is provided on operation panel 112.
- the S color bar change key When the operator operates the S color bar change key, a signal is output to the CPU 111, and the screen of the display monitor 108 enters the color bar change mode shown in FIG.
- This color bar change mode screen is a display in which the original data of the first display form of the color bar is graphed on the graphic memory and read out. That is, the hue that changes from red to green to blue is assigned to the vertical axis of the graph, and the minimum value ( ⁇ ) to maximum value ( ⁇ ) of the distortion is assigned to the horizontal axis.
- the target is represented by (distortion ⁇ , hue code C).
- the hue code C in the first display mode, the hue code C
- This function is displayed as a straight line 301 in the graph.
- the operator operates an input device such as a mouse to change the color bar, and drags a point ( ⁇ , C) on the straight line 301 to (1/4 ⁇ , Go to C)
- This change of the straight line display can be executed by graph display software installed in the CPU 111. Then, the CPU 111 recalculates the relationship between the distortion on the straight line and the hue code, and stores it in the memory of the color bar configuration unit 110.
- the same result can be obtained by inputting a force coordinate point from a keyboard by dragging a point on the straight line with an input device such as a mouse to change the straight line.
- a portion having a small distortion is displayed in an enlarged hue.
- a portion having a large distortion can be displayed in an enlarged hue.
- the point at which the straight line 301 is changed to the polygonal line can be arbitrarily selected by a coordinate point of the operator.
- the relationship between the distortion and the hue code is represented by two straight lines.
- the relationship between the force distortion and the hue code can be represented by three or more straight lines.
- Figure 5 shows an example.
- the polygonal line shown in FIG. 5 is composed of straight lines 401, 402, 403, and 404.
- the distortion is small V
- the magnitude of the part and distortion is large
- the hue change in the part is large
- the hue change in the middle part of the distortion is small.
- the relationship between the distortion and the hue code can be set by an arbitrary number of straight lines. If you have an unlimited number of straight lines, you can easily imagine that they may be curved.
- the same hue code can be given to a portion having a distortion value equal to or more than a certain value.
- all pixels having a distortion of X times or more of the average value of the distortion are given a red hue code.
- a portion having a large distortion is displayed in the same color, and only a portion having a small distortion is given a hue change. The display reduces the area that the operator must observe carefully.
- the present invention further provides a single hue, such as red, yellow, green, gray, and black, which does not provide a hue code such that the hue is inclined and changes to blue. It is also possible to make the distortion range different.
- Figure 7 illustrates this. In the example shown in FIG. 7, the minimum distortion value ⁇ to l / ⁇ ⁇ is black, the l / ⁇ ⁇ force is gray up to l / ⁇ ⁇ , and the distortion average value ⁇ from l / ⁇ ⁇ .
- the number of hues is five. This number is not particularly limited.
- FIG. 8 is a diagram illustrating the embodiment. In this embodiment, a state in which the screens of FIGS. 2 to 7 described above are displayed, here, a state shown in FIG. 2 will be described as an example.
- a doctor sets a coordinate point or a minute ROI 203A in the affected part using an input operation device such as a mouse. Then, the CPU 111 accesses the memory and specifies the hue information given to the coordinate point or the pixel of the minute ROI 203A. The CPU 111 then makes a bar-shaped mark in the color bar 205 based on the specified hue information, and identifies the pixels; ⁇ a force that is a vertical distortion, or a distortion reference value, for example, an average value. Which is displayed using a numerical value or a sign at a position adjacent to the color bar 205. This can be easily implemented softly since the color bar is originally created based on the relationship between the distortion and the hue.
- the strain image data described above can be used by an examiner, such as a doctor, on the body surface of the subject 101 in addition to the displacement of the heart itself due to the heart beat of the human body, the displacement of the surrounding tissue due to the heart beat.
- an examiner such as a doctor
- the present invention forms an image (elastic image) showing the elastic modulus of an organ or tissue instead of a strain image by detecting the pressure of pressing the ultrasonic probe against the subject, and
- the present invention can also be applied to a case where the image is displayed in combination with a tomographic image. Young's modulus Ym, one of the indices indicating the elasticity of tissue, is
- the pressure applied to the ultrasonic probe 102 by the inspector is detected by the pressure sensor 113.
- the pressure sensor 113 may be provided on the same surface as the surface where the ultrasonic probe 102 comes into contact with the body surface of the subject 101, and may directly detect pressure, or A compression mechanism provided on the same surface as the surface contacting the body surface and a detection mechanism for detecting the compression force applied to the ultrasonic probe 102 are assembled into the ultrasonic probe 102.
- the compression force detected and divided may be divided by the area of the compression member.
- the elastic modulus image is obtained by imaging the Young's modulus Ymi, j obtained from the pressure applied to the subject and the strain data in this manner.
- This elastic modulus image is displayed, In addition, if a color is given and displayed, a cancer or tumor site can be distinguished from a normal tissue. Then, the relationship between the hue color bar and the elastic modulus can be applied to the relationship between the hue color bar and the distortion in the above-described distorted image display, but this can be easily understood by those skilled in the art without explanation. There will be.
- the present invention has been described in detail, the present invention is not limited to the above embodiment, and various modifications can be made.
- the strain measurement is performed only within the ROI
- the strain measurement may be performed for the entire field of view of the ultrasonic measurement.
- the reference value for expressing the quantitativeness of the strain is the average strain value or the maximum strain value measured from the living tissue, but the present invention is not particularly limited thereto.
- an elastic material may be placed between the subject and the probe so that strain can be measured from the load or pressure applied to the probe, and the strain value of the material may be used as a reference value for comparative numerical values. ,.
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JP2006514781A JP5203605B2 (ja) | 2004-06-18 | 2005-06-16 | 超音波診断装置 |
US11/629,918 US20080051659A1 (en) | 2004-06-18 | 2005-06-16 | Ultrasonic Diagnostic Apparatus |
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Cited By (24)
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JP2007296335A (ja) * | 2006-05-05 | 2007-11-15 | General Electric Co <Ge> | 超音波システムに表示させた関連情報を特定するためのユーザインタフェース及び方法 |
JP2008272025A (ja) * | 2007-04-25 | 2008-11-13 | Toshiba Corp | 超音波診断装置 |
JP2009000448A (ja) * | 2007-06-25 | 2009-01-08 | Toshiba Corp | 超音波診断装置、超音波画像処理装置、及び超音波画像処理プログラム |
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JPWO2005122906A1 (ja) | 2008-04-10 |
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