JP6033546B2 - Ultrasonic diagnostic apparatus and control program therefor - Google Patents

Description

  The present invention relates to an ultrasonic diagnostic apparatus, and more particularly to an ultrasonic diagnostic apparatus that displays an image representing the hardness or softness of a living tissue and a control program thereof.

  For example, Patent Literature 1 discloses an ultrasonic diagnostic apparatus that synthesizes and displays a normal B-mode image and an elastic image representing the hardness or softness of a living tissue. In this type of ultrasonic diagnostic apparatus, the elasticity image is created as follows. First, ultrasonic waves are transmitted and received while deforming a living tissue by repeatedly pressing and relaxing the living tissue with an ultrasonic probe, for example, to acquire an echo. Based on the obtained echo data (echo data), a physical quantity related to the elasticity of the living tissue is calculated, and the physical quantity is converted into color information to create a color elastic image. Incidentally, as a physical quantity related to the elasticity of the living tissue, for example, a strain of the living tissue is calculated.

Japanese Patent No. 3932482

  However, when pressure is applied to the living tissue, the force is not uniformly applied to the deep part of the living tissue, and the degree of compression from the ultrasonic probe decreases as the distance from the body surface increases. Accordingly, even in a portion having the same hardness in the living tissue, the strain amount becomes smaller as the depth increases, so that the elasticity image is displayed to have different elasticity.

  Here, when the living tissue is vibrated, the length and amplitude of the vibration time differ depending on the hardness of the living tissue. Specifically, the harder the living tissue, the shorter the vibration time and the smaller the amplitude. On the other hand, the softer the living tissue, the longer the vibration time and the larger the amplitude. Based on such a viewpoint, the inventor of the present application diligently studied an ultrasonic diagnostic apparatus capable of displaying an image that accurately reflects the elasticity of a living tissue until reaching a deeper depth than in the past, and reached the present invention.

  One aspect of the invention based on the above-described viewpoint is that an ultrasonic probe that obtains an echo signal by scanning an ultrasonic wave with respect to a living tissue of a subject, and vibration is applied based on the echo signal. A vibration time calculation unit that calculates a vibration time of the biological tissue that is obtained, and a display unit that displays an image having a display form corresponding to the length of the vibration time calculated by the vibration time calculation unit. Is an ultrasonic diagnostic apparatus.

  Another aspect of the invention relates to an ultrasonic probe that acquires an echo signal by scanning an ultrasonic wave with respect to a biological tissue of a subject, and the echo signal within a vibration time of the biological tissue to which vibration is applied. A cumulative value calculation unit that calculates a cumulative value of the deformation amount of the signal waveform, and a display unit that displays an image having a display form corresponding to the cumulative value calculated by the cumulative value calculation unit. This is an ultrasonic diagnostic apparatus.

  According to the above aspect of the invention, an image having a display form corresponding to the length of vibration time of the biological tissue is displayed. Here, it is possible to apply force to the deep part of the living tissue when the vibration is applied, rather than pressing the living tissue. Therefore, it is possible to display an image that more accurately reflects the elasticity of the living tissue up to the deep part than in the conventional case where an elastic image including color information corresponding to the amount of strain due to compression is displayed.

  According to the invention of the other aspect described above, an accumulated value of the deformation amount of the signal waveform of the echo signal within the vibration time of the biological tissue to which vibration is applied is calculated, and an image having a display form corresponding to the accumulated value Therefore, an image that accurately reflects the elasticity of the living tissue can be displayed up to the deep part as compared with the conventional case where an elastic image composed of color information corresponding to the amount of strain due to compression is displayed.

It is a block diagram which shows an example of schematic structure of 1st embodiment of the ultrasonic diagnosing device which concerns on this invention. It is a block diagram which shows the structure of the display control part in the ultrasonic diagnosing device shown in FIG. It is a figure which shows the display part on which the ultrasonic image by which the B mode image and the elasticity image were synthesize | combined was displayed. It is a conceptual diagram for demonstrating giving a vibration with a finger | toe with respect to a biological tissue. It is a figure for demonstrating calculation of vibration time. It is a figure for demonstrating calculation of vibration time. It is a figure for demonstrating the calculation of the deformation amount of a signal waveform by performing a correlation calculation about two echo signals adjacent in time. It is a figure which shows the ultrasonic image obtained by giving a vibration with respect to a phantom. It is a block diagram which shows an example of schematic structure of 2nd embodiment of the ultrasonic diagnosing device which concerns on this invention. It is a figure for demonstrating calculation of the cumulative addition value in 2nd embodiment. It is a figure for demonstrating calculation of the cumulative addition value in 2nd embodiment. In the modification of 2nd embodiment, it is explanatory drawing which gives a vibration 3 times with respect to a biological tissue.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
First, a first embodiment will be described with reference to FIGS. 1 includes an ultrasonic probe 2, a transmission / reception unit 3, a B-mode processing unit 4, a vibration time calculation unit 5, a display control unit 6, a display unit 7, an operation unit 8, a control unit 9, and an HDD. (Hard Disk Drive) 10 is provided.

  The ultrasonic probe 2 is configured to have a plurality of ultrasonic transducers (not shown) arranged in an array. The ultrasonic transducer 2 scans the subject with ultrasonic waves and returns an echo signal. To get. The ultrasonic probe 2 is an example of an embodiment of an ultrasonic probe in the present invention.

  The transmitting / receiving unit 3 supplies power for transmitting ultrasonic waves from the ultrasonic probe 2 under a predetermined scanning condition to the ultrasonic probe 2 based on a control signal from the control unit 9. The transmission / reception unit 3 performs signal processing such as phasing addition processing on the echo received by the ultrasonic probe 2. The echo data signal-processed by the transmission / reception unit 3 is output to the B-mode processing unit 4 and the vibration time calculation unit 5.

  The B-mode processing unit 4 performs B-mode processing such as logarithmic compression processing and envelope detection processing on echo data (RF data) output from the transmission / reception unit 3 to create B-mode data. The B mode data is output from the B mode processing unit 4 to the display control unit 6.

  The vibration time calculation unit 5 calculates the deformation amount of the signal waveform of the echo signal based on the echo data output from the transmission / reception unit 3, and stops after the vibration of the biological tissue to which vibration is applied starts. The vibration time until is calculated (vibration time calculation function). Details will be described later. The vibration time calculation unit 5 is an example of an embodiment of a vibration time calculation unit in the present invention. Vibration time information data indicating the length of the vibration time is output from the vibration time calculation unit 5 to the display control unit 6. The vibration time information data is data on a sound ray corresponding to one pixel.

  The display control unit 6 receives B mode data from the B mode processing unit 4 and vibration time information data from the vibration time calculation unit 5. The display control unit 6 includes a B-mode image data creation unit 61, an elastic image data creation unit 62, and a display image control unit 63 as shown in FIG.

  The B-mode image data creation unit 61 performs scan conversion on the B-mode data, which is data acquired in the sound ray direction, by a scan converter and has luminance information corresponding to echo signal intensity. Convert to image data. The elastic image data creation unit 62 performs scanning conversion by the scan converter for the vibration time information data which is data acquired in the sound ray direction, and has an elastic image having display form information corresponding to the length of the vibration time. Convert to data. In this example, the display form information is color information.

  Incidentally, the luminance information in the B-mode image data and the color information in the elastic image data have predetermined gradations (for example, 256 gradations).

  As shown in FIG. 3, the display image control unit 63 causes the display unit 7 to display an ultrasonic image G obtained by combining the elastic image EG and the B-mode image BG (display image control function). Specifically, the display image control unit 63 synthesizes the B-mode image data and the elasticity image data by addition processing, and creates image data of the ultrasonic image G displayed on the display unit 7. This image data is displayed on the display unit 7 as an ultrasonic image G in which a monochrome B-mode image BG and a color elastic image EG are combined. The elastic image EG is displayed in a region of interest R set in the B-mode image BG in a translucent manner (with the background B-mode image transparent).

  The display image control unit 63 may display only the B mode image BG on the display unit 7.

  The display unit 7 includes, for example, an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube), or the like. The display unit 7 is an example of an embodiment of a display unit in the present invention. The operation unit 8 includes a keyboard and a pointing device (not shown) for an operator to input instructions and information.

  The control unit 9 includes a CPU (Central Processing Unit), reads a control program stored in the HDD 10, and includes the vibration time calculation function, display image control function, and the like. The function in each part of 1 is executed.

  Now, the operation of the ultrasonic diagnostic apparatus 1 of this example will be described. The operator scans ultrasonic waves with respect to the living tissue of the subject using the ultrasonic probe 2 and acquires an echo signal. Based on the ultrasonic echo signal acquired by the ultrasonic probe 2, the B-mode processing unit 4 creates the B-mode data. Based on the B-mode data, the B-mode image data creation unit 61 creates B-mode image data, and the B-mode image BG is displayed on the display unit 7 (not shown).

  When the B-mode image BG is displayed, the operator sets the region of interest R (see FIG. 3) on the B-mode image BG. Then, an ultrasonic image G on which the elastic image EG is displayed is displayed in the region of interest R.

  The creation of the elastic image EG will be described. When the elastic image EG is displayed, vibration is applied to the living tissue BT as shown in FIG. The vibration given here is a pulse-like vibration given by hitting the surface of the living tissue BT. For example, the body surface is struck once with a finger to vibrate the biological tissue BT, and ultrasonic waves are transmitted and received. Alternatively, vibration may be applied by discharging compressed air to the surface of the living tissue BT.

  In FIG. 4, symbols L1, L2, L3, L4, and L5 indicate sound rays. Although only five sound rays are shown here for convenience of explanation, the actual number of sound rays may be larger than this.

  The vibration time calculation unit 5 calculates a vibration time T until the vibration of the living tissue BT ends based on the obtained echo data. This vibration time T is a time from the start to the end of the vibration of the living tissue BT. The vibration time calculation unit 5 calculates the vibration time T based on the deformation amount of the signal waveform of the echo signal.

  The calculation of the vibration time T will be described. The vibration time calculation unit 5 calculates the deformation amount of the signal waveform in two echo signals that are temporally different on the same sound ray on one scanning plane, and until the signal waveform is not deformed after the signal waveform is deformed. Is calculated as the vibration time T. The vibration time calculation unit 5 calculates the vibration time T for each part corresponding to one pixel on the sound ray.

  The calculation of the vibration time T will be specifically described. FIG. 5 shows an echo signal S1 from the portion P1 in the sound ray L2 shown in FIG. FIG. 6 shows an echo signal S2 from the portion P2 in the sound ray L4 shown in FIG. The portions P1 and P2 correspond to one pixel.

  The vibration time calculator 5 calculates the vibration time T1 of the portion P1 based on the deformation of the signal waveform of the echo signal S1, and the vibration time T2 of the portion P2 based on the deformation of the signal waveform of the echo signal S2. Is calculated. The echo signal S1 used for calculating the vibration time T1 includes the echo signal S11 acquired at time ta, the echo signal S12 acquired at time tb, the echo signal S13 acquired at time tc, and acquired at time td. The echo signal S14, the echo signal S (n-1) acquired at time te, and the echo signal Sn acquired at time tf are included.

  The echo signal S2 used for calculating the vibration time T2 includes an echo signal S21 acquired at time tg, an echo signal S22 acquired at time th, an echo signal S23 acquired at time ti, and acquired at time tj. Echo signal S (m−1) and echo signal Sm acquired at time tk are included.

  When the living tissue is vibrating, the signal waveform of the echo signal is deformed. Accordingly, as shown in FIG. 7, the vibration time calculation unit 5 calculates a signal waveform deformation amount D in two echo signals S and S ′ that are temporally adjacent to each other until the deformation disappears. Is calculated as the vibration time T. Here, the deformation of the signal waveform means the expansion and contraction of the signal.

  Specifically, the vibration time calculation unit 5 includes a signal waveform deformation amount Dab in the echo signals S11 and S12, a signal waveform deformation amount Dbc in the echo signals S12 and 13, and a signal waveform in the echo signals S13 and S14. The deformation time Dcd and the deformation amount Def of the signal waveform in the echo signals S (n−1) and Sn are calculated to calculate the vibration time T1. In addition, the vibration time calculation unit 5 includes a signal waveform deformation amount Dgh in the echo signals S21 and S22, a signal waveform deformation amount Dhi in the echo signals S22 and 23, and the echo signals S (m−1) and Sm. The vibration time T2 is calculated by calculating the deformation amount Djk of the signal waveform.

  Here, the vibration time calculation unit 5 calculates a deformation amount D of the signal waveform by performing a correlation calculation on two echo signals S and S ′ that are temporally adjacent to each other. More specifically, for example, as described in Japanese Patent Application Laid-Open No. 2008-126079, the vibration time calculation unit 5 calculates an imaginary part of a complex correlation function of two echo signals. This imaginary part means the amount of deformation of the waveforms of the two echo signals.

  Incidentally, the echo signals S1, S2, S, S ′ are echo signals within one correlation window set in the correlation calculation. The vibration time calculation unit 5 performs a correlation calculation by appropriately setting a correlation window at a predetermined portion of the echo signal for one sound ray. 5 to 7 show analog echo signals for convenience of explanation, the vibration time calculation unit 5 performs a correlation operation on the digital signals.

  In FIG. 5, time ta is before vibration, and an echo signal in the vibration state is acquired from time tb. Accordingly, some non-zero value is obtained as the deformation amount Dab, and the deformation of the signal waveform of the echo signal starts to be calculated.

  Further, at time te, an echo signal is acquired in a state where the vibration is finished. Therefore, before the time te, some non-zero value is calculated as the deformation amount D of the signal waveform in two echo signals that are temporally adjacent. After the time te, since the living tissue is not vibrating, the waveforms of the echo signals S1 (n−1) and Sn are the same waveform, and the deformation amount Def becomes zero. Therefore, the vibration time calculation unit 5 sets the time from time tb to time te as the vibration time T1.

  In FIG. 6, time tg is before vibration, and an echo signal in the vibration state is acquired from time th. Accordingly, some non-zero value is obtained as the deformation amount Dgh, and the deformation of the signal waveform of the echo signal starts to be calculated.

  Further, at time tj, an echo signal is acquired in a state where the vibration is finished. Therefore, before the time tj, some non-zero value is calculated as the deformation amount D of the signal waveform in two echo signals that are temporally adjacent. After the time tj, since the living tissue is not oscillating, the waveforms of the echo signals S (m−1) and Sm are the same waveform, and the deformation amount Djk becomes zero. Accordingly, the vibration time calculation unit 5 sets the time from time th to time tj as the vibration time T2.

  In the above description, the calculation of the vibration times T1 and T2 for the portions P1 and P2 has been described, but the vibration time calculation unit 5 at least for all the portions corresponding to one pixel on each sound ray in the region of interest R, The vibration time T is calculated by the same method as described above.

  When the vibration time T in each part of the living tissue is calculated by the vibration time calculation unit 5, vibration time information data indicating the vibration time T is input to the elastic image data creation unit 62. The elastic image data creating unit 62 creates elastic image data having color information corresponding to the length of the vibration time T based on the vibration time information data. Then, the display image control unit 63 synthesizes the B-mode image data created by the B-mode image data creation unit 61 and the elastic image data, and an ultrasonic image composed of the elastic image EG and the B-mode image BG. G is displayed on the display unit 7.

  In the elastic image EG, a color indicating that the material is harder as the vibration time T is shorter is displayed, and a color indicating that the material is softer as the vibration time T is longer is displayed. Incidentally, since the vibration time T2 is shorter than the vibration time T1, in the elastic image EG, a color indicating that it is harder than the portion corresponding to the portion P1 is displayed in the portion corresponding to the portion P2. .

  According to the ultrasonic diagnostic apparatus 1 of the present example described above, the elastic image EG composed of color information corresponding to the vibration time is displayed. Here, when the vibration is applied in a pulsed manner by hitting the surface of the biological tissue, it is possible to apply a force to the deep part of the biological tissue, rather than pressing the biological tissue. Therefore, the elastic image EG is an image that accurately reflects the elasticity of the living tissue up to the depth, compared to the conventional case where an elastic image composed of color information corresponding to the amount of strain due to compression is displayed.

  FIG. 8 shows a two-dimensional ultrasonic image G obtained by applying vibration to a phantom made by imitating a biological tissue and calculating the vibration time. A color elastic image EG is displayed in the region of interest R set in the B-mode image BG. In this elastic image EG, the circular part with the symbol C is a softer part than the surroundings. This portion C is spherical in the phantom. In the elastic image EG, the circular outline of the portion C appears relatively clearly up to the deep part. The elastic image EG is an image having excellent separation ability from a hard part around to the deep part.

  Next, a modification of the first embodiment will be described. The calculation target for calculating the deformation amount D of the signal waveform of the echo signal may not be two echo signals that are temporally adjacent. Correlation calculation may be performed between an echo signal before vibration and another echo signal. For example, as the calculation of the deformation amount of the signal waveform of the echo signal S1, the deformation amount of the signal waveform in the echo signals S11 and S12, the deformation amount of the signal waveform in the echo signals S11 and S13, and the signal waveform in the echo signals S11 and S14 And the deformation amount of the signal waveform in the echo signals S11, S (n-1) are calculated. Since the echo signal S (n-1) is not different from the signal waveform of the echo signal S11, the amount of deformation of the signal waveform in the echo signals S11, S (n-1) becomes zero. Therefore, since the time when the signal waveform is not deformed is known, the vibration time T1 can be calculated.

(Second embodiment)
Next, a second embodiment will be described. In the following description, items different from the first embodiment will be described.

  As shown in FIG. 9, the ultrasonic diagnostic apparatus 20 of this example includes a cumulative value calculation unit 21 instead of the vibration time calculation unit 5. This cumulative value calculation unit 21 calculates the cumulative value of the deformation amount of the signal waveform of the echo signal within the vibration time T of the biological tissue given vibration (cumulative value calculation function). The cumulative value calculation unit 21 is an example of an embodiment of a cumulative value calculation unit in the present invention.

  Specifically, like the vibration time calculation unit 5, the cumulative value calculation unit 21 calculates the deformation amount D of the signal waveform in two echo signals that are temporally adjacent to each part of the living tissue by correlation calculation. To do. Then, the cumulative value calculation unit 21 calculates the cumulative addition value of the variable metric D for each part of the biological tissue BT within the vibration time T (from the start to the end of vibration) of the biological tissue BT.

  For example, for the portion P1, the cumulative value calculation unit 21 performs signal waveform deformation amount Dab in the echo signals S11 and S12, signal waveform deformation amount Dbc in the echo signals S12 and S13, as shown in FIG. A cumulative addition value of the signal waveform deformation amount Dcd in the signals S13 and S14 and the signal waveform deformation amount Dle in the echo signals S (n-2) and S (n-1) is calculated.

  However, the cumulative value calculation unit 21 also calculates a signal waveform deformation amount Def (not shown in FIG. 10) in the echo signals S (n−1) and Sn when calculating the cumulative addition value. Since the deformation amount Def is zero, the cumulative value calculation unit 21 uses the deformation amounts Dab, Dbc, Dcd, and Dle in calculating the cumulative addition value. Thereby, the cumulative addition value of the deformation amount within the vibration time T1 is obtained.

  For the portion P2, as shown in FIG. 11, the signal waveform deformation amount Dgh in the echo signals S21 and S22, the signal waveform deformation amount Dhi in the echo signals S22 and 23, and the echo signal S (m− 2) The cumulative addition value of the deformation amount Doj of the signal waveform at S (m−1) is calculated.

  However, the cumulative value calculator 21 also calculates the signal waveform deformation amount Djk (not shown in FIG. 11) in the echo signals S (m−1) and Sm in calculating the cumulative added value. Since the deformation amount Djk is zero, the cumulative value calculation unit 21 uses the deformation amounts Dgh, Dhi, Doj in calculating the cumulative addition value. Thereby, the cumulative addition value of the deformation amount within the vibration time T2 is obtained.

  Here, the harder the living tissue, the smaller the amount of deformation and the shorter the vibration time. On the other hand, the softer the living tissue, the larger the amount of deformation and the longer the vibration time. Accordingly, the cumulative addition value decreases as the portion is harder, and the cumulative addition value increases as the portion is softer. For example, since the deformation amount of the portion P2 is smaller than that of the portion P1, and the vibration time is shorter than that of the portion P1, the cumulative added value is smaller than that of the portion P1.

  Cumulative addition value data indicating the cumulative addition value calculated by the cumulative value calculation unit 21 is output to the display control unit 6. The elastic image data creation unit 62 of the display control unit 6 creates elastic image data having color information corresponding to the magnitude of the cumulative addition value based on the cumulative addition value data.

  In the elasticity image EG displayed based on the elasticity image data, a color indicating that the elasticity is harder is displayed as the cumulative addition value is smaller, and a color indicating that the elasticity is softer as the cumulative addition value is larger.

  According to the ultrasonic diagnostic apparatus 1 of the present example described above, the elastic image EG including color information corresponding to the cumulative addition value of the deformation amount of the signal waveform of the echo signal caused by vibration is displayed. Accordingly, it is possible to display the elastic image EG that reflects the elasticity of the living tissue more accurately than in the past in which an elastic image composed of color information corresponding to the amount of strain due to compression is displayed.

  Next, a modification of the second embodiment will be described. In this modification, ultrasonic waves are transmitted / received by giving a plurality of vibrations to a living tissue at predetermined time intervals, and the cumulative value calculation unit 21 calculates the total deformation amount of the signal waveform of the obtained echo signal. May be calculated for each part of the living tissue. For example, when the operator strikes the body surface with a finger three times at a predetermined time interval, and the body tissue is vibrated three times as shown in FIG. 12, the echo signal at the first vibration time T11 is shown. The accumulated addition value of the deformation amount of the signal waveform is X1, the cumulative addition value of the deformation amount of the signal waveform of the echo signal at the second vibration time T12 is X2, and the deformation amount of the signal waveform of the echo signal at the third vibration time T13. When the cumulative addition value is X3, the cumulative value calculation unit 21 calculates a total cumulative addition value Xt = X1 + X2 + X3.

  The total cumulative addition value Xt is calculated for each part of the living tissue. Data indicating the total accumulated addition value Xt is output to the display control unit 6, and the elastic image data creating unit 62 creates elastic image data based on this data.

  Note that the cumulative value calculation unit 21 may calculate an average cumulative addition value Xa in a plurality of vibrations instead of the total cumulative addition value Xt. For example, when the vibration is applied three times as described above, the cumulative value calculation unit 21 calculates the average cumulative addition value Xa = (X1 + X2 + X3) / 3.

  As mentioned above, although this invention was demonstrated by said each embodiment, of course, this invention can be variously implemented in the range which does not change the main point. For example, the method of applying vibration to the living tissue is not limited to hitting the body surface with a finger or releasing compressed air. Vibration may be applied by hitting the body surface with a rod-like object instead of a finger. Moreover, you may transmit the ultrasonic wave which has a sound pressure which vibrates a biological tissue to a biological tissue. In this case, after transmitting ultrasonic waves for vibration, ultrasonic waves for images are transmitted.

  The vibration time calculation unit 5 and the cumulative value calculation unit 21 calculate the amount of deformation of the signal waveform of the echo signal based on IQ data obtained by orthogonal detection of the echo data output from the transmission / reception unit 3. It may be calculated.

  Also in the first embodiment, similarly to the modified example of the second embodiment, a plurality of vibrations may be applied to the living tissue at predetermined time intervals. In this case, the vibration time calculation unit 5 may calculate the vibration time T in each vibration, calculate the average value Ta, and create an elastic image based on the average value Ta. Thereby, an elastic image having a display form corresponding to the average value Ta is displayed. For example, when the vibration is applied to the living tissue three times, assuming that the first vibration time is T11, the second vibration time is T12, and the third vibration time is T13, the vibration time calculation unit 5 calculates the average The value Ta = (T11 + T12 + T13) / 3 is calculated.

  Further, when a plurality of vibrations are applied, the vibration time calculation unit 5 calculates a cumulative addition value Tt of the vibration time T in each vibration, and creates an elastic image based on the cumulative addition value Tt. Also good. Thereby, an elastic image having a display form corresponding to the cumulative addition value Tt is displayed. For example, when the vibration is applied three times as described above, the vibration time calculation unit 5 calculates the cumulative addition value Tt = T11 + T12 + T13.

DESCRIPTION OF SYMBOLS 1,20 Ultrasonic diagnostic apparatus 2 Ultrasonic probe 5 Vibration time calculation part 7 Display part 21 Cumulative value calculation part

Claims (11)

An ultrasonic probe that obtains an echo signal by scanning an ultrasonic wave with respect to a living tissue of a subject;
Based on the echo signal, a vibration time calculation unit that calculates a vibration time from the start to the end of the vibration of the biological tissue to which vibration is given by being hit by the surface of the biological tissue;
A display unit on which an image having a display form corresponding to the length of the vibration time calculated by the vibration time calculation unit is displayed;
An ultrasonic diagnostic apparatus comprising:   The ultrasonic diagnostic apparatus according to claim 1, wherein the vibration time calculation unit calculates the vibration time based on a deformation of a signal waveform of the echo signal.   The said vibration time calculation part calculates the said vibration time based on the echo signal acquired before the vibration of the said biological tissue before the vibration stop and after a vibration stop. Ultrasonic diagnostic equipment.   The vibration time calculation unit calculates the deformation amount of the signal waveform in two echo signals different in time on the same sound ray on one scanning plane for each part of the living tissue, and after the signal waveform deformation occurs, The ultrasonic diagnostic apparatus according to claim 1, wherein the vibration time is calculated by calculating a time until the deformation is eliminated.   The vibration time calculation unit calculates a deformation amount of the signal waveform in each part of the living tissue by performing a correlation operation on two echo signals different in time on the same sound ray on one scanning plane. The ultrasonic diagnostic apparatus according to claim 4. An ultrasonic probe that obtains an echo signal by scanning an ultrasonic wave with respect to a living tissue of a subject;
A cumulative value calculation unit that calculates a cumulative value of the amount of deformation of the wavelength of the signal waveform of the echo signal within the vibration time of the biological tissue to which vibration is given by the surface of the biological tissue being struck;
A display unit on which an image having a display form corresponding to the cumulative value calculated by the cumulative value calculation unit is displayed;
An ultrasonic diagnostic apparatus comprising:   The ultrasonic wave according to claim 6, wherein the cumulative value calculation unit calculates the cumulative value based on an echo signal acquired from before the vibration of the living tissue is started until after the vibration is stopped. Diagnostic device.   The cumulative value calculation unit calculates a cumulative amount of deformation from the occurrence of signal waveform deformation in two echo signals different in time on the same sound ray on one scanning plane until the signal waveform is no longer deformed. The ultrasonic diagnostic apparatus according to claim 6, wherein the calculation is performed for each unit.   The cumulative value calculation unit calculates a deformation amount of the signal waveform in each part of the living tissue by performing a correlation operation on two echo signals different in time on the same sound ray on one scanning plane. The ultrasonic diagnostic apparatus according to claim 8. On the computer,
From the start to the end of the vibration of the biological tissue to which the vibration is given by the surface of the biological tissue being struck based on the echo signal acquired by ultrasonic scanning of the biological tissue of the subject by the ultrasonic probe Vibration time calculation function to calculate the vibration time of
A display image control function for causing the display unit to display an image having a display form corresponding to the length of the vibration time calculated by the vibration time calculation function;
A control program for an ultrasonic diagnostic apparatus, characterized in that On the computer,
The vibration time of the living tissue vibrations by the surface of the subject body tissue is hit is given, the change of the wavelength of the signal waveform of the acquired echo signal by the ultrasonic scanning with respect to the biological tissue by the ultrasonic probe A cumulative value calculation function for calculating the cumulative value of the amount;
A display image control function for causing the display unit to display an image having a display form corresponding to the cumulative value calculated by the cumulative value calculation function;
A control program for an ultrasonic diagnostic apparatus, characterized in that