JP2014193228A - Ultrasonic diagnostic apparatus and control program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus which can reduce burdens on an operator who measures the same portion of a sample.SOLUTION: An ultrasonic diagnostic apparatus has: a display image control section 53 which displays an ultrasonic image on the basis of an echo signal; an input section in which an operator, in the ultrasonic image, specifies a measurement target to which a predetermined measurement is performed; a measurement value calculation section which calculates a measurement value for the measurement target; a position calculation section 51 which calculates a position of the measurement target, in a predetermined coordinate system; a storage section which stores the measurement value and information on the position of the measurement target; and an indicator display control section 56 which displays an indicator indicating the distance between a transmission/reception surface of ultrasonic wave by an ultrasonic probe at the time of measurement which is different from the measurement time in which the measurement target is set and the measurement target whose position information has been stored.

Description

  The present invention relates to an ultrasonic diagnostic apparatus that performs measurement and a control program thereof.

  Various measurements are performed in an ultrasonic diagnostic apparatus that displays an ultrasonic image based on an echo signal obtained by transmitting ultrasonic waves into a subject. For example, a measurement device that calculates the propagation velocity of shear waves generated in a living tissue by transmitting an ultrasonic pulse (pushing pulse) to the living tissue of the subject and measures the elastic modulus of the living tissue. It is disclosed in Patent Document 1 and the like. In some cases, a cursor or the like is displayed on the ultrasonic image to measure the diameter of the tumor or the size of the fetus.

JP 2010-526626 A

  By the way, when performing measurement, follow-up observation may be performed on the same part of the subject. In this case, it is a burden on the operator that the operator searches for a measurement target every time measurement is performed.

  One aspect of the invention made in order to solve the above-described problems is an ultrasonic probe that transmits and receives ultrasonic waves to and from a subject in a predetermined coordinate system to acquire an echo signal, and an ultrasonic probe based on the echo signal. A display image control unit for displaying a sound wave image, an input unit for designating a measurement target to be subjected to predetermined measurement in the ultrasonic image, and a measurement value calculation for calculating a measurement value of the measurement target A position detection unit that detects a position of the measurement target in the predetermined coordinate system, a storage unit that stores the measurement value and position information of the measurement target, and a measurement time when the measurement target is set. An indicator display control unit for displaying an indicator indicating a distance between the ultrasonic wave transmission / reception surface of the ultrasonic probe and the measurement object in which the position information is stored at different measurement times; An ultrasonic diagnostic apparatus characterized by obtaining.

  In another aspect of the invention, an ultrasonic probe that transmits and receives ultrasonic waves to a subject in a three-dimensional space to acquire an echo signal, and a display image control unit that displays an ultrasonic image based on the echo signal A measurement target setting unit that sets a measurement target to be subjected to predetermined measurement in the ultrasonic image, a measurement value calculation unit that calculates a measurement value of the measurement target, and predetermined coordinates in the three-dimensional space In the system, a position detection unit for detecting the position of the measurement object, a storage unit for storing the measurement value and the position information of the measurement object, and a first at the time of measurement different from the measurement time when the measurement object is set A position correspondence specifying unit that specifies a position correspondence between coordinates in the ultrasonic image and coordinates in the second ultrasonic image at the time of measurement in which the measurement target is set, The unit stores position information of the measurement target in the second ultrasonic image, and the measurement value calculation unit is based on the position information of the measurement target stored in the storage unit and the position correspondence relationship. The ultrasonic diagnostic apparatus is characterized in that a measurement value of the measurement target whose position in the first ultrasonic image is specified is calculated.

  According to the first aspect of the invention, at the time of measurement different from the measurement at which the measurement target is set, the distance between the ultrasonic transmission / reception surface of the ultrasonic probe and the measurement target in which the position information is stored is calculated. Since the indicator which shows is displayed, a measuring object can be found easily. Therefore, it is possible to reduce the burden on the operator who performs measurement on the same part of the subject.

  According to the invention of the other aspect, the position in the first ultrasonic image is specified and the measurement is performed on the measurement target in which the position information in the second ultrasonic image is stored in the storage unit. When a measurement target is measured a plurality of times, it is possible to perform measurement in which an accurate position of the measurement target is specified. In addition, every time measurement is performed, the operator can perform measurement at the same position without searching for the measurement target.

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 in the ultrasonic diagnosing device shown by FIG. It is a block diagram which shows the structure of the control part in the ultrasonic diagnosing device shown by FIG. It is a flowchart which shows the process of the first test | inspection. It is a figure which shows the display part on which the ultrasonic image was displayed. It is a figure which shows the ultrasonic image by which the marker was set to the measurement object part. It is explanatory drawing of the ultrasonic pulse transmitted in order to measure an elasticity modulus. It is a flowchart which shows the process of the remeasurement for monitoring a time-dependent change. It is a figure which shows the display part on which two ultrasonic images were displayed side by side. It is a figure which shows the display part by which the indicator was displayed on the ultrasonic image. It is a figure which shows the display part on which the ultrasonic image UI1 and the reference ultrasonic image UI2 of the cross section containing a measurement object were displayed. It is a figure which shows the graph of a some measured value.

  Hereinafter, embodiments of the present invention will be described. An ultrasonic diagnostic apparatus 1 shown 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 ultrasonic probe 2 is provided with the magnetic sensor 10 composed of, for example, a Hall element. The magnetic sensor 10 detects the magnetism generated from the magnetic generator 11 composed of, for example, a magnetic generating coil. A detection signal in the magnetic sensor 10 is input to the display control unit 5. A detection signal in the magnetic sensor 10 may be input to the display control unit 5 via a cable (not shown), or may be input to the display control unit 5 wirelessly. The magnetism generator 11 and the magnetic sensor 10 are provided to detect the position and inclination of the ultrasonic probe 2 as will be described later.

  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 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 such as logarithmic compression processing and envelope detection processing to create B mode data.

  As shown in FIG. 2, the display control unit 5 includes a position calculation unit 51, an ultrasonic image data creation unit 52, a display image control unit 53, a measurement target setting unit 54, a position correspondence setting unit 55, and an indicator display control unit. 56. The position calculation unit 51 executes a position calculation function. Specifically, the position calculation unit 51 determines the position of the ultrasonic probe 2 in the coordinate system with the magnetic generation unit 11 as the origin in a three-dimensional space based on the magnetic detection signal from the magnetic sensor 10. Tilt information (hereinafter referred to as “probe position information”) is calculated. Further, the position calculation unit 51 calculates position information (position information of the ultrasonic wave transmission / reception surface) of the echo signal in the coordinate system based on the probe position information. Further, the position calculation unit 51 specifies the marker set by the measurement target setting unit 54 and the position of the measurement target by using the position information of the echo signal, as will be described later. The position calculation unit 51 and the magnetic sensor 10 are an example of an embodiment of a position detection unit in the present invention. The position calculation function is an example of an embodiment of the position detection function in the present invention.

  The ultrasonic image data creation unit 52 scans the data input from the echo data processing unit 4 using a scan converter to create ultrasonic image data.

  The display image control unit 53 causes the display unit 6 to display an ultrasound image UI based on the ultrasound image data (display image control function). The display image control unit 53 is an example of an embodiment of a display image control unit in the present invention. The display image control function is an example of an embodiment of the display image control function in the present invention.

  The measurement target setting unit 54 sets a marker and a measurement target in the ultrasonic image UI based on the input from the operation unit 7 as described later. The measurement target setting unit 54 is an example of an embodiment of a measurement target setting unit in the present invention.

  The indicator display control unit 56 is an indicator In () that indicates the distance in the three-dimensional space between the measurement object or the marker and the ultrasonic transmission / reception surface (cross section of the real-time ultrasonic image UI) of the ultrasonic probe 2. 10) is displayed on the display unit 6 (indicator display control function). The indicator display control unit 56 is an example of an embodiment of an indicator display control unit in the present invention. The indicator display control function is an example of an embodiment of the indicator display control function in the present invention.

  The display unit 6 is an LCD (Liquid Crystal Display), a CRT (Cathode Ray Tube), or the like. The operation unit 7 includes a keyboard and a pointing device (not shown) 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 includes a CPU (Central Processing Unit) (not shown). The control unit 8 reads the control program stored in the storage unit 9 and performs functions in each unit of the ultrasonic diagnostic apparatus 1 including the position calculation function, the display image control function, and the indicator display control function. Let it run.

  Moreover, the said control part 8 performs a measurement function by the measurement part 81 shown in FIG. Details will be described later. The measurement unit 81 is an example of an embodiment of a measurement value calculation unit in the present invention. The measurement function is an example of an embodiment of the measurement value calculation function in the present invention.

  Further, the control unit 8 executes the storage function to the storage unit 9 by the storage control function by the storage control unit 82. The storage control function is an example of an embodiment of the storage control function in the present invention.

  The storage unit 9 is an HDD (Hard Disk Drive), a semiconductor memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage unit 9 may store raw data such as B-mode data obtained by the echo data processing unit 4 in addition to the control program. The storage unit 9 may store ultrasonic image data obtained by the ultrasonic image data creation unit 52. The raw data and the ultrasonic image data stored in the storage unit 9 are stored in the storage unit 9 together with the position information obtained by the position calculation unit 51.

  Further, the storage unit 9 stores the measurement value obtained by the measurement unit 81, the marker obtained by the position calculation unit 51, and the position of the measurement target.

  The storage control function for the storage unit 9 is executed by the storage control unit 82.

  Now, an operation when performing measurement using the ultrasonic diagnostic apparatus 1 of the present example will be described. In this example, the position of the measurement target that was measured in the first examination is stored, and the measurement is performed again to monitor the change over time for the measurement target. First, the measurement in the first inspection will be described based on the flowchart of FIG. The measurement time in the first inspection corresponds to an example of the measurement time when the measurement target is set in the present invention.

  First, in step S1, the operator starts transmission / reception of ultrasonic waves by bringing the ultrasonic probe 2 into contact with the body surface of the subject. Then, as shown in FIG. 5, the display image control unit 53 causes the display unit 6 to display a real-time ultrasonic image UI created based on the echo signal. The ultrasonic image UI is, for example, a B mode image.

  Next, in step S2, the operator moves the ultrasonic probe 2 to display a lesion L such as a tumor on the ultrasonic image UI. Then, the operator operates the operation unit 7 to set a marker serving as a reference for setting the measurement target in the ultrasonic image UI. For example, as shown in FIG. 6, the operator sets a marker M1 on the lesion L in the ultrasound image UI. The marker M1 is a “x” mark in this example. Further, the operator sets a marker M2 in a portion other than the lesioned part L in order to compare with the measurement result of the lesioned part L. The marker M2 is a “Δ” mark in this example. The markers M1 and M2 are set by the measurement target setting unit 54 based on the input from the operation unit 7.

  The storage control unit 82 stores the set positions of the markers M1 and M2 in the storage unit 9. The positions of the markers M <b> 1 and M <b> 2 stored here are positions in a coordinate system with the magnetic generator 11 as the origin in the three-dimensional space. The positions of the markers M1 and M2 are positions specified by the position calculation unit 51 based on position information of the echo signal.

  Next, in step S3, measurement is performed. In this example, the elastic modulus of the biological tissue of the subject is measured. The measurement of the elastic modulus will be specifically described. When the operator inputs the start of the measurement mode in the operation unit 7, the measurement target setting unit 54 uses the portion where the markers M1 and M2 are set as a reference, as shown in FIG. Region R is set. The measurement target region R is set for each of the markers M1 and M2 (in FIG. 7, only one measurement target region R is shown).

  A measurement target region R set with reference to the marker M1 is defined as a measurement region X1. Further, a measurement target region R set with reference to the marker M2 is defined as a measurement region X2. The measurement areas X1 and X2 are an example of an embodiment of a measurement target in the present invention.

  The measurement areas X1 and X2 are quadrangular areas in this example, but the shape is not limited to this. The positions of the measurement regions X1 and X2 in the coordinate system with the magnetic generation unit 11 as the origin may be calculated by the position calculation unit 51 and stored in the storage unit 9.

  When the measurement target region R is set, the ultrasonic probe 2 transmits an ultrasonic pulse in the measurement mode. As shown in FIG. 7, the transmitted ultrasonic pulse includes a pushing pulse PP and a measurement pulse DP for measuring the propagation speed of the shear wave (only the sound rays SL1 and SL2 are shown as described later). It is. The pushing pulse PP and the measurement pulse DP are transmitted to each of the measurement regions X1 and X2.

  The ultrasonic probe 2 transmits a pushing pulse PP with the region R as a focal point. The ultrasonic probe 2 transmits the measurement pulse DP (only the sound ray is shown in FIG. 7) on the sound rays SL1 and SL2 in the vicinity of the pushing pulse PP.

  The measurement unit 81 calculates the propagation speed of shear waves generated by vibration of the living tissue by the pushing pulse for the measurement regions X1 and X2. Specifically, the measurement unit 81 calculates the propagation velocity V based on the echo signal of the measurement pulse DP received by the ultrasonic probe 2. The measurement unit 81 calculates the propagation speed of the shear wave based on the echo signal of the measurement pulse DP for the two sound lines.

  The measurement unit 81 calculates an elastic modulus for the measurement regions X1 and X2 based on the propagation speed of shear waves. Here, there is a correlation between the propagation speed of the shear wave and the elastic modulus. Specifically, the smaller the elastic modulus of the living tissue is, the softer the shear wave propagation speed becomes. On the other hand, the greater the elastic modulus of the living tissue (the harder it is), the smaller the shear wave propagation speed. Therefore, as described above, the elastic modulus can be calculated based on the propagation speed of the shear wave.

  The calculated elastic modulus is stored in the storage unit 9. Further, the elastic modulus may be displayed on the display unit 6.

  In the initial examination, the operator uses the ultrasonic probe 2 to superimpose a three-dimensional region of the subject including a cross section necessary for performing the alignment process described later, in addition to the cross section including the measurement regions X1 and X2. Send and receive sound waves. A cross section necessary for performing the alignment process is a cross section including a characteristic portion such as a branch portion of a blood vessel.

  Based on the echo signal obtained from the three-dimensional region of the subject, at least one of the raw data created by the echo data processing unit 4 and the ultrasound image data created by the ultrasound image data creation unit 52 is It is stored in the storage unit 9. The data stored here is volume data. This volume data is stored in the storage unit 9 together with the position information obtained by the position calculation unit 51.

  Next, in order to monitor the change over time for the measurement regions X1 and X2, a process for performing measurement again will be described. At the time of re-measurement, that is, at the time of the second and subsequent measurements (measurement time different from the measurement time when the measurement target is set), a real-time ultrasonic image is displayed. In addition, the same cross-section of the subject as that of the real-time ultrasonic image is specified in the volume data stored at the time of the first examination, and an ultrasonic image based on this volume data is displayed. Specific processing will be described based on the flowchart of FIG.

  First, in step S <b> 11, the operator starts transmission / reception of ultrasonic waves using the ultrasonic probe 2. The display image control unit 53 displays a real-time ultrasonic image UI1 based on ultrasonic image data created from the obtained echo signal. Further, the display image control unit 53 displays the reference ultrasonic image UI2 based on the volume data stored in the storage unit 9. The display image control unit 53 displays the ultrasonic image UI1 and the reference ultrasonic image UI2 side by side on the display unit 6, as shown in FIG.

  Here, at the time of the previous examination, at least one of the position of the magnetic generator 11 and the position of the subject may be changed. In this case, the coordinates of the same position of the subject are different between the coordinate system of the ultrasonic image UI1 in real time and the coordinate system of the reference ultrasonic image UI2. Accordingly, in step S12, alignment processing is performed for specifying position correspondence information in the coordinate system of the ultrasonic image UI1 in real time and the coordinate system of the reference ultrasonic image UI2.

  Specifically, the operator moves the cross section of one or both images while comparing the ultrasonic image UI1 displayed on the display unit 6 and the reference ultrasonic image UI2, and thereby superimposes the same cross section. The sound wave image UI1 and the reference ultrasonic image UI2 are displayed. The cross section of the ultrasonic image UI is moved by changing the position of the ultrasonic probe 2. The cross section of the reference ultrasonic image UI2 is moved by operating the operation unit 7 and inputting an instruction to change the cross section.

  The operator displays an image of a cross section including a characteristic portion such as a bifurcation portion of the blood vessel as the ultrasonic image UI1 and the reference ultrasonic image UI2 of the same cross section. When the ultrasonic image UI1 and the reference ultrasonic image UI2 for the same cross section are displayed, the operator uses the trackball or the like of the operation unit 7 to select any part such as a characteristic portion in the ultrasonic image UI1. Specify a point. In addition, the operator also designates a point in the reference ultrasound image UI2 that seems to be at the same position as the point designated in the ultrasound image UI1. The operator designates such points for a plurality of points.

  Here, the data of the reference ultrasonic image UI2 has position information. Further, the position information of the data of the ultrasonic image UI1 is obtained by the position calculation unit 51. Therefore, as described above, when a point that is considered to be the same position is specified in the ultrasonic image UI1 and the reference ultrasonic image UI2, the position correspondence specifying unit 55 sets the coordinate system of these ultrasonic images UI1 and A coordinate conversion formula with the coordinate system of the reference ultrasonic image UI2 is obtained, and the position correspondence is specified. Thereby, the positional correspondence between the coordinates in the ultrasonic image UI1 and the coordinates in the reference ultrasonic image UI2 is specified. When the alignment process is completed as described above and the ultrasonic probe 2 is moved, a reference ultrasonic image UI2 having the same cross section as the real-time ultrasonic image UI1 is displayed in accordance with the movement.

  Incidentally, the ultrasonic image UI1 is an example of an embodiment of the first ultrasonic image in the present invention. The ultrasonic image UI2 is an example of an embodiment of the second ultrasonic image in the present invention.

  When the alignment process in step S12 is completed, in step S13, the display image control unit 53 performs a real-time ultrasonic image UI1 and a cross section corresponding to the position of the echo signal calculated by the position calculation unit 51. The reference ultrasonic image UI2 is displayed. The ultrasonic image UI1 and the reference ultrasonic image UI2 displayed here are images of the same cross section in the subject.

  In step S13, the indicator display control unit 56 displays an indicator In on the ultrasonic image UI1 as shown in FIG. The indicator In is displayed at the positions of the markers M1 and M2 in the ultrasonic image UI1. The indicator In indicates the distance d in the three-dimensional space between the ultrasonic transmission / reception surface (cross section of the real-time ultrasonic image UI1) of the ultrasonic probe 2 and the measurement regions X1 and X2. In this example, the indicator In is a quadrangle having an area corresponding to the distance d.

  The indicator display control unit 56 converts the position information (coordinates) of the measurement areas X1 and X2 stored in the storage unit 9 into the coordinate system of the ultrasonic image UI1, and the position calculation unit 51 performs position conversion. The distance d to the ultrasonic wave transmission / reception surface is calculated. The indicator display control unit 56 may calculate the distance d by converting the ultrasonic transmission / reception surface of the ultrasonic probe 2 into the coordinate system of the reference ultrasonic image UI2.

  The indicator display control unit 56 may calculate the distance between the ultrasonic transmission / reception surface of the ultrasonic probe 2 and the markers M1 and M2 and display the indicator In indicating the distance. In this case, the indicator display control unit 56 may calculate the distance d by converting the markers M1 and M2 into the coordinate system of the ultrasonic image UI1.

  The “position of the measurement target” in the present invention includes the positions of the markers M1 and M2 serving as a reference for setting the measurement target.

  Next, in step S14, the operator moves the ultrasonic probe 2 to display the ultrasonic image UI1 and the reference ultrasonic image UI2 of the cross section including the measurement regions X1 and X2. Specifically, the operator moves the ultrasonic probe 2 so that the square becomes smaller while looking at the indicator In. When the distance d becomes zero, the indicator In becomes the markers M1 and M2 as shown in FIG. 11, and an ultrasonic image UI1 and a reference ultrasonic image UI2 of a cross section including the measurement regions X1 and X2 are displayed. Is done.

  Next, in step S15, the measurement areas X1 and X2 are measured in the same manner as in step S3 described above. However, in the measurement in step S15, the measurement unit 81 performs coordinate conversion of the position information of the measurement areas X1 and X2 stored in the storage unit 9 into the coordinate system of the ultrasonic image UI1. Then, the position after the coordinate conversion is measured as the position to be measured.

  The second and subsequent measurements are performed according to steps S11 to S15. The obtained measurement value is stored in the storage unit 9.

  The display image control unit 53 displays the plurality of measurement values stored in the storage unit 9 on the display unit 6 (not shown in FIG. 12) as a graph G as shown in FIG. In the graph G, the horizontal axis indicates the date (measurement date), and the vertical axis indicates the elastic modulus (measurement value).

  In the graph G, a graph G1 with an “x” mark indicates a measurement value in the measurement region X1. Further, a graph G2 marked with “Δ” indicates the measurement value of the measurement region X2.

  However, the plurality of measured values are not limited to being displayed as a graph. For example, instead of a graph, a table including numerical values indicating measured values and dates may be displayed.

  According to the example described above, in the second and subsequent measurements, the measurement areas X1 and X2 can be easily found by the indicator In. In the second and subsequent measurements, the positions of the measurement areas X1 and X2 are stored, so that the operator can perform measurement without specifying the measurement areas X1 and X2. Therefore, it is possible to reduce the burden on the operator who performs measurement on the same part of the subject.

  Further, the positions of the measurement areas X1 and X2 designated in the first measurement (when the measurement target is set) are stored, and the second and subsequent measurements (when the measurement target is set and the measurement target are set) are stored. Therefore, the measurement value can be monitored by the measurement with the exact position specified. Further, it is not necessary for the operator to search for the measurement target.

  Furthermore, since a plurality of measurement values obtained by measurement with an accurate position specified as described above are stored and can be displayed, it is possible to know a change with time of the measurement target with an accurate position specified. .

  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, the measurement areas X1 and X2 may not be stored, and only the positions of the markers M1 and M2 may be stored. In this case, in the second and subsequent measurements for monitoring changes over time, the measurement regions X1 and X2 are set again with reference to the markers M1 and M2.

  In the above-described embodiment, the case of measuring the hardness of a living tissue has been described as an example, but the present invention can also be applied to other measurements. For example, the present invention can be similarly applied when measuring the size of an observation target such as a tumor in an ultrasonic image. In this case, the measurement unit 81 may specify the range of the tumor by image processing by the measurement target setting unit 54 and perform measurement. The range of the tumor by image processing may be specified based on the position where the operator sets a marker. Further, the measurement may be performed by the operator specifying the range of the tumor using the operation unit 7 without using image processing.

DESCRIPTION OF SYMBOLS 1 Ultrasonic diagnostic apparatus 2 Ultrasonic probe 7 Operation part 9 Memory | storage part
DESCRIPTION OF SYMBOLS 10 Magnetic sensor 11 Magnetic generation part 51 Position calculation part 53 Display image control part 56 Indicator display control part 81 Measurement part

Claims (11)

An ultrasound probe that transmits and receives ultrasound to and from an object in a three-dimensional space to obtain an echo signal;
A display image control unit for displaying an ultrasonic image based on the echo signal;
In the ultrasonic image, a measurement target setting unit that sets a measurement target to be subjected to predetermined measurement;
A measurement value calculation unit for calculating a measurement value of the measurement object;
In a predetermined coordinate system in the three-dimensional space, a position detection unit that detects a position of the ultrasonic transmission / reception surface and the measurement target by the ultrasonic probe;
A storage unit for storing the measurement value and position information of the measurement target;
The transmission / reception surface of the ultrasonic wave by the ultrasonic probe at the time of measurement different from the measurement time when the measurement target is set, and the transmission / reception surface whose position is detected by the position detection unit, and the measurement in which the position information is stored An indicator display control unit for displaying an indicator indicating the distance to the object;
An ultrasonic diagnostic apparatus comprising: A position that specifies a positional correspondence relationship between coordinates in the first ultrasonic image at the time of measurement different from the measurement time at which the measurement target is set and coordinates in the second ultrasonic image at the time of measurement in which the measurement target is set It has a correspondence specifying part,
The storage unit stores position information of a measurement target in the second ultrasonic image,
The ultrasonic diagnostic apparatus according to claim 1, wherein the indicator display control unit displays the indicator based on position information of the measurement target stored in the storage unit and the position correspondence relationship.   The measurement value calculation unit is configured to determine the position in the three-dimensional space based on the position information stored in the storage unit after the position information of the measurement target is stored in the storage unit. The ultrasonic diagnostic apparatus according to claim 1, wherein the measurement value of the target is calculated. An ultrasound probe that transmits and receives ultrasound to and from an object in a three-dimensional space to obtain an echo signal;
A display image control unit for displaying an ultrasonic image based on the echo signal;
In the ultrasonic image, a measurement target setting unit that sets a measurement target to be subjected to predetermined measurement;
A measurement value calculation unit for calculating a measurement value of the measurement object;
A position detection unit that detects a position of the measurement target in a predetermined coordinate system in the three-dimensional space;
A storage unit for storing the measurement value and position information of the measurement target;
A position that specifies a positional correspondence relationship between coordinates in the first ultrasonic image at the time of measurement different from the measurement time at which the measurement target is set and coordinates in the second ultrasonic image at the time of measurement in which the measurement target is set A correspondence specifying unit,
The storage unit stores position information of a measurement target in the second ultrasonic image,
The measurement value calculation unit calculates the measurement value of the measurement object whose position in the first ultrasonic image is specified based on the position information of the measurement object stored in the storage unit and the position correspondence relationship. An ultrasonic diagnostic apparatus characterized by the above.   The position correspondence specifying unit is configured to specify the position correspondence when the operator specifies the same position in the subject in the first ultrasonic image and the second ultrasonic image. The ultrasonic diagnostic apparatus according to claim 2 or 4.   The ultrasonic wave according to claim 1, wherein a plurality of measurement values are stored in the storage unit for the same measurement target whose position information is stored in the storage unit. Diagnostic device.   The ultrasonic display according to claim 1, wherein the display image control unit displays a plurality of measurement values for the same measurement target whose position information is stored in the storage unit. Diagnostic device.   The ultrasonic diagnostic apparatus according to claim 1, wherein the coordinate system is formed by a magnetism generator installed in the three-dimensional space. The ultrasonic probe is provided with a magnetic sensor for detecting the magnetism of the magnetism generation unit,
The ultrasonic diagnostic apparatus according to claim 8, wherein the position detection unit detects a position of the measurement target based on a detection signal of the magnetic sensor. On the computer,
A display image control function for displaying an ultrasonic image based on an echo signal acquired by transmitting and receiving ultrasonic waves with an ultrasonic probe to a subject in a three-dimensional space;
In the ultrasonic image, a measurement target setting function for setting a measurement target to be a predetermined measurement;
A measurement value calculation function for calculating the measurement value of the measurement object;
In a predetermined coordinate system in the three-dimensional space, a position detection function for detecting the position of the ultrasonic transmission / reception surface by the ultrasonic probe and the measurement target;
A storage control function for storing the measurement value and the position information of the measurement target in a storage unit;
The transmission / reception surface of the ultrasonic wave by the ultrasonic probe at the time of measurement different from the measurement time when the measurement target is set, and the transmission / reception surface whose position is detected by the position detection unit, and the measurement in which the position information is stored An indicator display control function for displaying an indicator showing the distance to the object;
A control program for an ultrasonic diagnostic apparatus, characterized in that On the computer,
A display image control function for displaying an ultrasonic image based on an echo signal acquired by transmitting and receiving ultrasonic waves to and from an object in a coordinate system of a three-dimensional space;
In the ultrasonic image, a measurement target setting function for setting a measurement target to be a predetermined measurement;
A measurement value calculation function for calculating the measurement value of the measurement object;
A position detection function for detecting a position of the measurement object in a predetermined coordinate system in the three-dimensional space;
A storage control function for storing the measurement value and the position information of the measurement target in a storage unit;
A position that specifies a positional correspondence relationship between coordinates in the first ultrasonic image at the time of measurement different from the measurement time at which the measurement target is set and coordinates in the second ultrasonic image at the time of measurement in which the measurement target is set A control program for an ultrasound diagnostic apparatus that executes a correspondence specifying function,
By the storage control function, the position information of the measurement target in the second ultrasonic image is stored in the storage unit,
The measurement value calculation function calculates the measurement value of the measurement object whose position in the first ultrasonic image is specified based on the position information of the measurement object stored in the storage unit and the position correspondence relationship. A control program for an ultrasonic diagnostic apparatus.

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