JP6275960B2 - Image display device - Google Patents

Description

  The present invention relates to an image display device that displays an image of a target based on data obtained by processing a signal obtained from the target, and a control program therefor.

  As an image display device, for example, there is an ultrasound diagnostic device that displays an ultrasound image based on an echo signal obtained by transmitting and receiving ultrasound to and from a subject. In this ultrasonic diagnostic apparatus, the moving amount and moving direction of the image are detected between the ultrasonic image of the current frame and the ultrasonic image of the immediately preceding frame (the frame one frame before the original frame), and the two There is a case where a movement process between frames is performed. For example, as described in Patent Document 1, a maximum value holding process for displaying a B-mode image having a maximum luminance value in a plurality of temporally different frames is performed on a cross section of a subject. There is. In this case, when the B-mode image moves due to breathing or body movement of the subject, the amount of movement and the moving direction of the image may be detected between the current frame and the immediately preceding frame to correct the position.

  Further, as shown in Patent Document 2, when a luminance change of a region of interest set in a target region of a B-mode image is displayed as a graph, the amount of movement and the direction of movement of the region of interest due to respiration or body movement of the subject May be detected and the region of interest may be moved.

  Further, Patent Document 3 describes an ultrasonic diagnostic apparatus that moves the display area of the ultrasonic image on the display unit by the amount of movement of the ultrasonic image.

JP 2006-247122 A (page 4) International Publication No. 2010/117025 Pamphlet JP 2011-240085 A

  However, in the movement process, the movement amount and the movement direction may not be detected accurately. If an accurate movement amount and movement direction cannot be detected, the ultrasonic image obtained by the maximum value holding process is an image that has not been subjected to accurate position correction. Further, if the accurate movement amount and movement direction cannot be detected, the movement of the region of interest and the movement of the display area of the ultrasonic image cannot be performed accurately. Therefore, it is desirable that an operator or the like can know the accuracy of movement by the movement process.

  One aspect of the invention made to solve the above-mentioned problem is an image display device that displays an image of the object based on data obtained by processing a signal obtained from the object, and is temporally Based on the degree of correlation obtained by performing correlation processing between the data of two different frames, a movement detection unit that detects the movement amount and movement direction of the target image, and the movement detection unit An image display device comprising: a movement processing unit that performs a movement process between the two frames using a movement amount and a movement direction; and a display unit that displays a temporal change in the correlation degree. .

  The invention according to another aspect is the input according to the invention according to the above aspect, wherein the time range in which the target image is reproduced is specified by the operator on the display unit based on the temporal change of the correlation degree. An image display device comprising a unit.

  According to the first aspect of the invention, the movement process between the two frames is performed using the movement amount and movement direction of the image of the subject detected based on the degree of correlation obtained by the correlation process. . Then, since the change of the correlation degree with time is displayed, it is possible to know the positional accuracy of the movement process.

  According to another aspect of the invention, since the operator can specify the temporal range in which the target image is reproduced based on the temporal change of the correlation degree, a movement process with a high correlation degree is performed. An image can be displayed.

It is a block diagram which shows an example of schematic structure of the ultrasonic diagnosing device in embodiment of this invention. It is a block diagram which shows the structure of the display control part of the ultrasonic diagnosing device shown by FIG. It is a figure explaining the detection of a movement amount and a movement direction. It is a figure which shows the display part on which the graph which shows a time-dependent change of a correlation value was displayed with the B mode image. FIG. 5 is an enlarged view of the graph shown in FIG. 4. It is an enlarged view which shows the other example of a graph. It is a figure which shows the graph displayed in the modification of 1st embodiment. It is a block diagram which shows the structure of the display control part in 2nd embodiment. It is a figure which shows the movement of a biological tissue. It is a figure which shows the movement of the ultrasonic image in the display area by movement of a biological tissue. In 2nd embodiment, it is a figure which shows the display part by which the graph which shows a time-dependent change of a correlation value was displayed with the B mode image. It is a block diagram which shows the structure of the display control part in 3rd embodiment. In 3rd embodiment, the graph which shows the time-dependent change of a correlation value and the graph which shows the luminance change of a region of interest are the figures which show the display part displayed with the B mode image. FIG. 14 is an enlarged view of the graph shown in FIG. 13. It is a figure which shows an example of the bar which shows a time-dependent change of a correlation degree.

Hereinafter, embodiments of the present invention will be described. In the following embodiments, an ultrasonic diagnostic apparatus will be described as an example of an image display apparatus according to the present invention.
(First embodiment)
First, the first embodiment will be described. An ultrasonic diagnostic apparatus 1 illustrated in FIG. 1 includes an ultrasonic probe 2, a transmission / reception beam former 3, an echo data processing unit 4, a display control unit 5, a display unit 6, an operation unit 7, a control unit 8, and a storage unit 9.

  The ultrasonic probe 2 includes a plurality of ultrasonic transducers (not shown) arranged in an array, and transmits ultrasonic waves to the subject through the ultrasonic transducers, and echo signals thereof. Receive.

  The transmission / reception beam former 3 supplies an electrical signal for transmitting an ultrasonic wave from the ultrasonic probe 2 under a predetermined scanning condition to the ultrasonic probe 2 based on a control signal from the control unit 8. The transmission / reception beamformer 3 performs signal processing such as A / D conversion and phasing addition processing on the echo signal received by the ultrasonic probe 2, and the echo data after the signal processing is sent to the echo data processing unit 4. Output to.

  The echo data processing unit 4 performs signal processing for creating an ultrasound image on the echo data output from the transmission / reception beamformer 3. For example, the echo data processing unit 4 performs B mode processing. This B-mode processing includes logarithmic compression processing, envelope detection processing, and the like. B mode data is created by the B mode processing.

  As shown in FIG. 2, the display control unit 5 includes an image data creation unit 51, a movement detection unit 52, a reflection data creation unit 53, and a display image control unit 54. The image data creation unit 51 creates B-mode image data by, for example, scan-converting the B-mode data with a scan converter.

  The movement detection unit 52 detects a movement amount and a movement direction of the B-mode image between the B-mode image data of two frames that are temporally different in a cross section of the subject (movement detection function). The movement detection unit 52 detects a movement amount and a movement direction based on the degree of correlation obtained by performing correlation processing between the B-mode image data of two frames. Details will be described later. The movement detector 52 is an example of an embodiment of a movement detector in the present invention. The movement detection function is an example of an embodiment of the movement detection function in the present invention.

  The reflection data creation unit 53 creates reflection B-mode image data reflecting a plurality of frames of B-mode image data at spatially corresponding positions. In this example, the reflection data creating unit 53 creates reflected B-mode image data reflecting B-mode image data of a plurality of frames by performing a maximum value holding process as will be described later. The reflected data creating unit 53 performs the maximum value holding process after performing the position correction process between the current frame (nth frame) and the immediately preceding frame ((n−1) th frame). The reflected data creation unit 53 is an example of an embodiment of a movement processing unit in the present invention. The function of the position correction process is an example of the embodiment of the movement processing function in the present invention.

  The display image control unit 54 causes the display unit 6 to display a B mode image based on the reflected B mode image data. In addition, the display image control unit 54 causes the display unit 6 to display a temporal change in the degree of correlation obtained by the correlation processing (display control function). Details will be described later.

  The display unit 6 is an LCD (Liquid Crystal Display), an organic EL (Electro-Luminescence) display, or the like. The display unit 6 is an example of an embodiment of a display unit in the present invention. Although not particularly illustrated, the operation unit 7 includes a keyboard, a dial, a pointing device, and the like for an operator to input instructions and information. The operation unit 7 is an example of an embodiment of an input unit in the present invention.

  The control unit 8 is a CPU (Central Processing Unit), reads a control program stored in the storage unit 9, and in addition to the movement detection function, the movement processing function, and the display control function, the ultrasonic diagnostic apparatus The function in each part of 1 is executed.

  The storage unit 9 is, for example, an HDD (Hard Disk Drive) or a semiconductor memory. The storage unit 9 may store the B mode data, the B mode image data, the reflected B mode image data, and the like.

  Now, the operation of the ultrasonic diagnostic apparatus 1 of this example will be described. The ultrasonic image displayed on the ultrasonic diagnostic apparatus 1 is a B-mode image based on the reflected B-mode image data obtained by the maximum value holding process. The maximum value holding process is performed for each frame, and a B-mode image based on the reflected B-mode image data is displayed for each frame (excluding the first frame). The maximum value holding process will be described in more detail. The reflected data creation unit 53 uses the B-mode image data of the current frame and the reflected B-mode image data of the immediately previous frame at positions (pixels) spatially corresponding to each other. The data is compared, and the one with the larger data value is selected to create reflected B-mode image data. The reflected B-mode image data created in this way is data in which a plurality of frames of B-mode image data are reflected, and the B-mode image displayed based on the reflected B-mode image data is a plurality of frames up to the current frame. It is an image having a maximum luminance value for each pixel.

  When the corresponding position is shifted between the current frame and the immediately preceding frame due to breathing or body movement of the subject, the reflected data creating unit 53 corrects the position of the B-mode image of the two frames. Then, the maximum value holding process is performed. Thereby, in the maximum value holding process, data values at accurate positions can be compared.

  The reflected data creation unit 53 performs position correction based on the movement amount and the movement direction detected by the movement detection unit 52. The movement detection unit 52 performs correlation processing between the B-mode image data of the current frame and the reflected B-mode image data of the immediately preceding frame, and detects the movement amount and movement direction of the image in the two-dimensional direction. The correlation process is a process for examining the correlation between two images, for example, a cross-correlation calculation. In this example, the correlation process is performed not on the entire two images but on a part thereof. More specifically, as shown in FIG. 3, the movement detection unit 52 between the current frame and the previous frame, the predetermined area RA of the B-mode image BI1 of one frame and the B-mode image of the other frame. Cross-correlation calculation is performed between a plurality of predetermined regions RB having different BI2 (only four are shown in FIG. 3 but are not limited thereto) to search for a position having the largest correlation value. Then, among the correlation values obtained by the respective cross-correlation calculations, the movement amount and movement direction between the region RB and the region RA having the largest correlation value are set as the movement amount and movement direction between the two frames. Incidentally, the correlation value obtained by the cross-correlation calculation is a correlation coefficient (≦ 1). The correlation coefficient is an example of the embodiment of the correlation degree in the present invention.

  A real-time B mode image displayed on the display unit 6 based on the reflected B mode image data may be stored in the storage unit 9 as reflected B mode image data. In this case, the maximum value of the correlation coefficient obtained by the cross correlation calculation for each frame is also stored in the storage unit 9.

  When the B-mode image BI based on the reflected B-mode image data stored in the storage unit 9 is displayed on the display unit 6, the display image control unit 54 stores in the storage unit 9 as shown in FIG. A graph G showing the change with time of the maximum value of the correlation coefficient is displayed. In this graph G, the vertical axis indicates the correlation coefficient, and the horizontal axis indicates time. The graph G may be displayed for the entire time at the start of reproduction.

  The graph G will be described in detail with reference to FIG. The graph G displays a triangular first indicator In1. This indicator In1 indicates the time corresponding to the frame of the B-mode image BI currently displayed on the display unit 6 in the graph G. The first indicator In1 moves to the left in FIGS. 4 and 5 along with the reproduction of the B-mode image BI.

  The graph G displays second indicators In2a and In2b. The second indicators In2a and In2b indicate a time range in which the B-mode image BI is reproduced. The second indicator In2a indicates the playback start point of the B-mode image BI, and the second indicator In2b indicates the playback end point of the B-mode image BI. The second indicators In2a and In2b can be moved left and right in FIGS. 4 and 5 when the operator operates the operation unit 7. Thereby, the operator can designate the time range in which the B-mode image BI is reproduced. For example, the operator refers to the graph G and sets a range in which the correlation coefficient is equal to or greater than a predetermined threshold TH as a reproduction range.

  In the graph G, as shown in FIG. 6, a third indicator In3 indicating the threshold value TH may be displayed. In FIG. 6, the third indicator In3 is displayed by a broken line.

  The display image control unit 54 may repeatedly reproduce the B-mode image BI for the reproduction range designated by the second indicators In2a and In2b.

  According to this example, since the graph G showing the change with time of the correlation coefficient is displayed, it is possible to know the accuracy of position correction when performing the maximum value holding process. Therefore, if the correlation coefficient is low in the graph G, it can be known that the B-mode image BI at that time is an image for which position correction has not been performed accurately.

  Further, since the reproduction range of the B-mode image BI can be set by the second indicators In2a and In2b, the B-mode image BI based on the reflected B-mode image data subjected to more accurate position correction is displayed. Can do.

  Next, a modification of the first embodiment will be described. First, the first modification will be described. In the above embodiment, the graph G is displayed when the B-mode image BI based on the reflected B-mode image data stored in the storage unit 9 is reproduced. The graph G is a real-time B-mode image. It may be displayed when the BI is displayed. FIG. 7 shows a graph G displayed when a real-time B-mode image BI is displayed. The right end of the graph G shows the correlation coefficient of the current frame displayed on the display unit 6. As time elapses, the first indicator In1 moves to the right, and the graph G extends to the right.

  Next, a second modification will be described. The correlation process performed by the movement detection unit 52 is not limited to the cross-correlation calculation, and may be a known process for detecting the moving amount and moving direction of an image between two frames. For example, the correlation process may be a calculation of a sum of absolute differences. Specifically, the movement detection unit 52 corresponds to a position between a predetermined area RA of the B-mode image BI1 of one frame and a plurality of different areas RB of the B-mode image BI2 of the other frame. The sum of the absolute values of the differences in the data (sum of absolute differences) is calculated. The higher the degree of correlation, the smaller the difference absolute value sum. Therefore, the movement amount and movement direction between the region RB and the region RA having the smallest difference absolute value sum among the difference absolute value sums obtained by the respective calculations are set as the movement amount and movement direction between the two frames. .

  When the movement amount and movement direction between two images are detected by calculating the difference absolute value sum, the minimum value of the difference absolute value sum is displayed instead of the graph G showing the change over time of the maximum value of the correlation coefficient. A graph showing the change over time is displayed.

  Next, a third modification will be described. When the correlation coefficient falls below a predetermined value or when the sum of absolute differences exceeds a predetermined value (that is, when the degree of correlation in the correlation process is smaller than the predetermined degree of correlation) The position correction may be stopped. In this case, when a reproduced image based on the data stored in the storage unit 9 is displayed, the reflected B is not corrected based on the B-mode image data of each frame stored in the storage unit 9. Mode image data is created. Then, a B mode image based on the reflected B mode image data is displayed.

(Second embodiment)
Next, a second embodiment will be described. Hereinafter, matters different from the first embodiment will be described.

  In this example, as described in JP 2011-240085 A, the display area of the ultrasonic image on the display unit 6 is moved by the amount of movement of the ultrasonic image. This will be specifically described. In this example, the display control unit 5 includes the image data creation unit 51, the movement detection unit 52, and the display image control unit 54 as shown in FIG. Therefore, the display control unit 5 does not have the reflection data creation unit 53. Therefore, the maximum value holding process is not performed, and an ultrasonic image based on the ultrasonic image data obtained for each frame is displayed.

  For example, as shown in FIG. 9, when the biological tissues a, b, c of the subject move from the position of the solid line to the position of the two-dot chain line by breathing or the like, generally, as shown in FIG. The ultrasonic image moves in the display area GR in the display unit 6. It is assumed that the ultrasonic image is a B-mode image BI. Incidentally, in FIG. 9, a symbol X indicates an ultrasonic wave transmission / reception region by the ultrasonic probe 2.

  In this example, the display image control unit 54 is based on the movement amount and the movement direction detected by the movement detection unit 52 between the B-mode image data of the current frame and the B-mode image data of the previous frame. The display area of the ultrasonic image on the display unit 6 is moved. That is, as shown in FIG. 11, the display image control unit 54 displays the current frame display area GR ′ (two-dot chain line) according to the movement amount and movement direction detected by the movement detection unit 52. The display area GR of the frame is moved to display the B mode image BI. Thereby, the moved biological tissue is displayed on the display unit 6 at the same position as before the movement.

  In this example, the movement of the display area GR is an example of an embodiment of the position correction of the ultrasonic image of two frames in the present invention, and the display image control unit 54 is an implementation of the movement processing unit in the present invention. It is an example of the form.

  Also in this example, as shown in FIG. 11 described above, the display unit 6 displays the graph G indicating the change over time in the correlation coefficient obtained by the cross-correlation calculation by the movement detection unit 52. FIG. 11 shows a graph G when the B-mode image BI displayed on the display unit 6 is not a real-time image but a reproduced image. Also in this example, the reproduction range of the B-mode image BI can be designated by the second indicators In2a and In2b.

  Further, although not particularly illustrated, when the B-mode image BI displayed on the display unit 6 is a real-time image, a graph G similar to that in FIG. 7 of the modification of the first embodiment is displayed.

  Also in this example, since the graph G is displayed, it is possible to know the accuracy of movement of the display area GR. In addition, since the reproduction range of the B-mode image BI can be designated by the second indicators In2a and In2b, the range in which the correlation coefficient is greater than or equal to a predetermined threshold value is designated, so that the display area GR is further increased. A B-mode image that is accurately moving can be reproduced.

  Also in this example, the display image control unit 54 stops the movement of the display region GR when the correlation coefficient falls below a predetermined value or when the sum of absolute differences exceeds a predetermined value. May be.

(Third embodiment)
Next, a third embodiment will be described. Hereinafter, matters different from the first and second embodiments will be described.

  In this example, the display control unit 5 includes a region of interest setting unit 55 in addition to the image data creation unit 51, the movement detection unit 52, and the display image control unit 54, as shown in FIG.

  In this example, the echo data processing unit 4 performs a process for creating a contrast image in which the contrast agent administered to the subject is emphasized on the echo data output from the transmission / reception beamformer 3. To create contrast mode data. For example, the echo data processing unit 4 performs a filter process for extracting a harmonic component of the echo signal. Further, the echo data processing unit 4 may perform a process of extracting an echo signal from the contrast agent by a pulse inversion method. Alternatively, the echo data processing unit 4 subtracts echo data based on echo signals obtained by transmitting ultrasonic waves having different amplitudes and extracts a signal component from a contrast agent (amplitude modulation method: Amplitude Modulation). May be performed.

  The image data creation unit 51 scans the contrast mode data to create contrast image data. Then, the display image control unit 54 causes the display unit 6 to display a contrast image based on the contrast image data.

  Also in this example, as in the second embodiment, the maximum value holding process is not performed, and an ultrasonic image based on the ultrasonic image data obtained for each frame is displayed. The ultrasound image is a contrast image CI, and regions of interest RO1 and RO2 are set in the contrast image CI as shown in FIG. For example, when the operator performs an input for setting the regions of interest RO1 and RO2 through the operation unit 7, the region of interest setting unit 55 sets the regions of interest RO1 and RO2. The regions of interest RO1 and RO2 are set as regions of interest of the subject.

  The display image control unit 54 causes the display unit 6 to display graphs (TIC: Time Intensity Curves) TI1 and TI2 indicating luminance changes of the regions of interest RO1 and RO2. FIG. 14 is an enlarged view of the graphs TI1 and TI2. In these graphs TI1 and TI2, the horizontal axis indicates time and the vertical axis indicates luminance. The graphs TI1 and TI2 are an example of an embodiment of the second graph in the present invention.

  In this example, the movement detection unit 52 performs a cross-correlation operation between the contrast image data of the current frame and the contrast image data of the immediately preceding frame for each of the regions of interest RO1 and RO2, and the interest image is detected in the contrast image. The amount of movement and the direction of movement of the portion where the regions RO1 and RO2 are set are detected. Similar to the first and second embodiments, the movement detection unit 52 searches for a position having the maximum correlation coefficient obtained by the cross-correlation calculation and detects the movement amount and the movement direction.

  The region-of-interest setting unit 55 moves the regions of interest RO1 and RO2 based on the movement amount and movement direction detected by the movement detection unit 52. That is, the region-of-interest setting unit 55 moves the region of interest RO1 and RO2 of the current frame with respect to the region of interest RO1 and RO2 of the immediately preceding frame according to the amount and direction of movement detected by the movement detector 52.

  In this example, the region-of-interest setting unit 55 is an example of an embodiment of a movement processing unit in the present invention.

  The display image control unit 54 is a graph G1 showing the change over time of the correlation coefficient obtained in the detection of the movement amount and movement direction of the region of interest RO1 and the correlation coefficient obtained in the detection of the movement amount and movement direction of the region of interest RO2. A graph G2 showing the change with time is displayed on the display unit 6 (FIGS. 13 and 14). The time on the time axis of the graphs G1 and G2 is the same as the time on the time axis of the graphs TI1 and TI2. The graphs G1 and G2 are an example of an embodiment of the first graph in the present invention.

  13 and 14 show graphs G1 and G2 and graphs TI1 and TI2 when the contrast image CI is a reproduced image. The graphs G1 and G2 and the graphs TI1 and TI2 may be displayed for the entire time at the start of reproduction.

  13 and 14, the first indicator In1 indicates the time corresponding to the frame of the B-mode image BI currently displayed on the display unit 6 in the graphs G1, G2 and the graphs T1, T2. Yes. Also in this example, the operator can set a time range in which the contrast image CI is reproduced by the second indicators In2a and In2b.

  According to this example, since the graphs G1 and G2 are displayed, it is possible to know the accuracy of movement of the regions of interest RO1 and RO2. In addition, since the reproduction range of the contrast image CI can be specified by the second indicators In2a and In2b, the range in which the correlation coefficient is equal to or larger than a predetermined threshold is specified in both the graphs G1 and G2. The B-mode image in which the regions of interest RO1 and RO2 are moving more accurately can be reproduced, and more accurate luminance change graphs TI1 and TI2 can be displayed.

  Next, a modification of the third embodiment will be described. First, the first modification will be described. As in the second modification of the first embodiment, the movement detection unit 52 may calculate a sum of absolute differences as the correlation process. That is, the movement detection unit 52 calculates the sum of absolute differences between the two frames for each of the regions of interest RO1 and RO2, and detects the amount of movement and the direction of movement of these regions of interest RO1 and RO2.

  When the difference absolute value sum is calculated, instead of the graphs G1 and G2 indicating the temporal change of the correlation coefficient, a graph showing the temporal change of the minimum value of the difference absolute value sum for the region of interest RO1, and the interest A graph showing a change with time of the minimum value of the sum of absolute differences for the region RO2 is displayed.

  Next, a second modification will be described. The region of interest setting unit 55 may stop the movement of the regions of interest RO1 and RO2 when the correlation coefficient falls below a predetermined value or when the sum of absolute differences exceeds a predetermined value.

  Next, a third modification will be described. Also in this example, the echo data processing unit 4 may create B mode data in addition to the contrast mode data. In this case, the movement detection unit 52 may perform a cross-correlation calculation based on the B-mode image data and detect a movement amount and a movement direction of a portion where the regions of interest RO1 and RO2 are set. Based on the movement amount and the movement direction, the region-of-interest setting unit 55 moves the regions of interest RO1 and RO2 in the contrast mode image.

  As mentioned above, although this invention was demonstrated by the said embodiment, of course, this invention can be variously implemented in the range which does not change the main point. For example, as shown in FIG. 15, a bar Ba indicating the change over time in the correlation degree in the correlation processing may be displayed on the display unit 6. In FIG. 15, only the bar Ba is shown. The bar Ba has a length in the vertical direction indicating the magnitude of the correlation (correlation coefficient or sum of absolute differences), and expands and contracts in the vertical direction as the degree of correlation changes.

  Further, the ultrasonic image displayed on the display unit 6 may be a three-dimensional moving image.

  Furthermore, the image display apparatus according to the present invention is not limited to an ultrasonic diagnostic apparatus, and may be a medical image display apparatus such as an X-ray CT apparatus and an MRI apparatus, or other image display apparatuses.

1 Ultrasonic diagnostic equipment (image display equipment)
2 Ultrasonic probe 6 Display unit 7 Operation unit 52 Movement detection unit 53 Reflection data creation unit (movement processing unit)
54 Display Image Control Unit (Movement Processing Unit)
55 Region of Interest Setting Unit (Movement Processing Unit)

Claims (9)

An image display device for displaying an image of the object based on data obtained by processing a signal obtained from the object,
A movement detection unit that detects a movement amount and a movement direction of the target image based on a correlation degree obtained by performing correlation processing between the data of two temporally different frames;
A movement processing unit that performs a movement process between the two frames using the movement amount and the movement direction detected by the movement detection unit;
A reflection data creation unit for creating reflection data reflecting each data of a plurality of frames at spatially corresponding positions after the movement processing by the movement processing unit;
A display unit that displays the change over time of the correlation and an image based on the reflected data as the target image ;
An input unit that an operator designates in the display unit a temporal range in which the target image is reproduced based on a change in the correlation degree with time,
An image display device comprising:   The image according to claim 1, wherein the movement processing unit performs position correction between the images of the two frames based on a movement amount and a movement direction detected by the movement detection unit. Display device.   The image display apparatus according to claim 1, wherein the movement processing unit performs a movement process of a region of interest set in the image based on a movement amount and a movement direction detected by the movement detection unit. .   The display unit displays a first graph showing the change over time in the correlation degree, and also displays a second graph showing the change over time in the luminance of the region of interest, and the time axis of the first graph 4. The image display device according to claim 3, wherein the time at the time and the time on the time axis of the second graph are the same. The object of the image display device as claimed in any one of claims 1 to 4, wherein the movement processing by the movement processing unit is an image based on the performed data. The movement processing unit, wherein, when the degree of correlation is less than a predetermined correlation, the image display apparatus according to any one of claims 1 to 5, characterized in that to stop the move. The said movement detection part searches the position where the said correlation degree is the largest between each data of the said two frames, and detects the said moving amount and the said moving direction of Claim 1-6 characterized by the above-mentioned. The image display apparatus as described in any one. Wherein the display section, as the temporal change of the correlation, any one of claims 1 to 7 which changes over time of the largest correlation between each of the data of the two frames, characterized in that the display The image display device according to item. An ultrasonic probe that transmits ultrasonic waves to the subject and obtains echo signals is provided.
The image display device as claimed in any one of claims 1 to 8, wherein a said subject an ultrasound image based on the echo signal processing performed by the data obtained.