JP5868479B2 - Ultrasonic diagnostic apparatus, ultrasonic image processing apparatus, medical image diagnostic apparatus, and medical image processing apparatus - Google Patents

Description

  Embodiments of the present invention provide an ultrasonic diagnostic apparatus for supporting simple and appropriate setting of a three-dimensional region of interest when displaying a three-dimensional image using volume data acquired by an ultrasonic diagnostic apparatus or the like, for example. The present invention relates to an ultrasonic image processing apparatus and a medical image processing apparatus.

  Ultrasound diagnosis can be performed repeatedly by simply touching the ultrasound probe from the body surface, and the heart beats and fetal movements can be obtained in real time, and it is highly safe. . In addition, it can be said that this is a simple diagnostic method in which the scale of the system is smaller than other diagnostic devices such as X-rays, CT, and MRI, and inspection can be easily performed while moving to the bedside. Ultrasound diagnostic devices used in this ultrasound diagnosis vary depending on the types of functions that they have, but small ones that can be carried with one hand have been developed. Thus, there is no influence of exposure, and it can be used in obstetrics and home medical care.

  It is also possible to acquire volume data using an ultrasonic diagnostic apparatus and observe a three-dimensional image. When acquiring such volume data, the volume data is acquired while the two-dimensional scanning surface is swung (periodically moved in a direction perpendicular to the two-dimensional scanning surface) by mechanical control of the one-dimensional array probe. Oscillating scanning or three-dimensional scanning by electronic control of a two-dimensional array probe is executed. For example, in the obstetric field, a three-dimensional image is generated and displayed using volume data acquired by these scanning techniques, and the growth state of the fetus is observed three-dimensionally (three-dimensionally).

  By the way, the placenta is a structure that envelops the whole fetus. For this reason, when imaging a fetus using an ultrasound diagnostic apparatus, the placenta may be seen in front of the face depending on how the ultrasound probe is applied, the orientation of the fetus face inside the placenta, the display direction, and the like. In such a case, the maternal structure (placenta) may become an artifact, and it may be difficult to depict the fetal face with an ultrasound image. For this reason, artifacts are reduced by setting a three-dimensional region of interest and cutting out the display region corresponding to the placenta existing between the ultrasound probe and the fetal face.

JP 2005-74225 A

  However, it is generally difficult to set an appropriate three-dimensional region of interest along the shape of the anatomy. For this reason, in a conventional ultrasonic diagnostic apparatus, for example, not only data corresponding to the placenta but also data corresponding to a part of the fetus may be cut out, and thus a desired three-dimensional image may not be generated and displayed. is there. In addition, if it is set not to cut out data corresponding to a part of the fetus, there is a problem that the operability is poor, such as requiring a lot of time.

  The present invention has been made in view of the above circumstances, and supports, for example, simple and appropriate setting of a three-dimensional region of interest when displaying a three-dimensional image using volume data acquired by an ultrasonic diagnostic apparatus or the like. An object of the present invention is to provide an ultrasonic diagnostic apparatus, an ultrasonic image processing apparatus, a medical image diagnostic apparatus, and a medical image processing apparatus.

  In order to achieve the above object, the following measures are taken.

An ultrasonic diagnostic apparatus according to an embodiment transmits an ultrasonic wave to a three-dimensional region including an observation target in a subject, receives a reflected wave from the three-dimensional region, and receives an echo signal related to the three-dimensional region. Transmission / reception means for acquiring volume data, data acquisition means for acquiring volume data relating to the three-dimensional area using echo signals relating to the three-dimensional area, and a user on a two-dimensional image relating to the two-dimensional area included in the three-dimensional area obtained by rotating in accordance with the examination information of the previously acquired the subject with at least three points specified, and the curve setting means for setting an elliptical shape or a perfect circular shape, the set elliptical or circular shape by A region-of-interest setting means for setting a three-dimensional region of interest for the volume data using a closed region, and orthogonality of the set three-dimensional region of interest Image generating means for generating an orthogonal three-section image relating to three sections, a display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest, and any of the displayed orthogonal three-sections, Input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest; and when the change instruction is input, according to the instruction, the position, size, Curve changing means for changing a shape and an observation position and an observation direction regarding two cross sections other than the cross section to which the change instruction is input out of the three orthogonal cross sections, and the image generating means includes the post-change A new orthogonal three-section image is generated using the three-dimensional region of interest and the changed observation position and observation direction .

An ultrasonic image processing apparatus according to an embodiment includes: storage means for storing volume data relating to the three-dimensional region acquired by ultrasonic scanning a three-dimensional region including an observation target in a subject; accordance with the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image concerning the two-dimensional region included in the region, and the curve setting means for setting an elliptical shape or a perfect circular shape, the setting Region-of-interest setting means for setting a three-dimensional region of interest for the volume data using a closed region obtained by rotating a circular shape or a perfect circle shape, and orthogonality of the set three-dimensional region of interest Image generating means for generating orthogonal three-section images relating to three sections, display means for displaying orthogonal three-section images relating to the set three-dimensional region of interest, and For any of the three orthogonal cross sections displayed, input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest, and when the change instruction is input, Curve changing means for changing the position, size, and shape of the three-dimensional region of interest and the observation position and the observation direction for two cross sections other than the cross section to which the change instruction is input among the three orthogonal cross sections, according to the instruction. The image generating means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction. To do.

A medical image diagnostic apparatus according to an embodiment includes a data acquisition unit that acquires volume data related to a three-dimensional region including an observation target in a subject, and a user on a two-dimensional image related to a two-dimensional region included in the three-dimensional region. obtained by rotating in accordance with the examination information of the previously acquired the subject with at least three points specified, and the curve setting means for setting an elliptical shape or a perfect circular shape, the set circular or circular shape by A region-of-interest setting unit that sets a three-dimensional region of interest for the volume data using a closed region, and an image generation unit that generates an orthogonal three-section image relating to the three orthogonal sections of the set three-dimensional region of interest. , Display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest, and any of the displayed orthogonal three-section images, An input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest, and when the change instruction is input, the position and size of the three-dimensional region of interest according to the instruction Curve changing means for changing an observation position and an observation direction regarding two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections, and the image generating means includes the change A new orthogonal three-section image is generated using the subsequent three-dimensional region of interest and the changed observation position and observation direction .

A medical image processing apparatus according to an embodiment includes storage means for storing volume data relating to a three-dimensional area including an observation target in a subject, acquired using a medical image diagnostic apparatus, and included in the three-dimensional area wherein according to the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image about the two-dimensional region, and the curve setting means for setting an elliptical shape or a perfect circular shape, the set circular Alternatively, a region of interest setting means for setting a three-dimensional region of interest with respect to the volume data using a closed region obtained by rotating a perfect circle shape, and orthogonality with respect to the orthogonal three cross sections of the set three-dimensional region of interest Image generating means for generating a three-section image; display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest; For any of the three cross-sections, input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest, and when the change instruction is input, according to the instruction, Curve changing means for changing the position, size, and shape of the three-dimensional region of interest, and the observation position and the observation direction related to two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections; The image generating means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction .

  As described above, according to the embodiment of the present invention, for example, when displaying a three-dimensional image using volume data acquired by an ultrasonic diagnostic apparatus or the like, an ultra-set for supporting simple and appropriate setting of a three-dimensional region of interest. An ultrasonic diagnostic apparatus, an ultrasonic image processing apparatus, a medical image diagnostic apparatus, and a medical image processing apparatus can be realized.

FIG. 1 is a block diagram of an ultrasonic diagnostic apparatus 1 according to the first embodiment. FIG. 2 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the first embodiment. FIGS. 3A and 3B are diagrams respectively showing a two-dimensional image and a three-dimensional image displayed as an initial image in step S3a. FIG. 4 is a diagram for explaining the process of changing the position, shape, and size of the two-dimensional interest curve, and shows an example in which a perfect circle is set as the two-dimensional interest curve. FIG. 5 is a diagram illustrating a three-dimensional region of interest set in the scanning direction by rotating a perfect circle as a two-dimensional interest curve around a rotation axis passing through the center O. FIG. 6 is a diagram exemplifying a three-dimensional region of interest set in the swing direction by rotating a perfect circle as a two-dimensional interest curve around an axis passing through the center O. FIG. FIG. 7 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the set three-dimensional region of interest. FIG. 8 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the second embodiment. FIG. 9 is a diagram showing a three-dimensional image displayed as an initial image in step S3b. FIG. 10 is a diagram illustrating three points set at arbitrary positions on the two-dimensional image. FIG. 11 is a diagram illustrating a three-dimensional region of interest set in the scanning direction by rotating a perfect circle as a two-dimensional interest curve around a rotation axis passing through the center O. FIG. 12 is a diagram illustrating a three-dimensional region of interest set in the swing direction by rotating a perfect circle as a two-dimensional interest curve about an axis passing through the center O. FIG. FIG. 13 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the set three-dimensional region of interest. FIG. 14 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the third embodiment. FIG. 15 is a diagram showing a three-dimensional image (volume rendering image) as an initial image displayed in step S3c. FIG. 16 is a diagram for explaining the rotation axis of an ellipse set as a two-dimensional interest curve. FIG. 17 is a diagram for explaining processing for changing the position, orientation, and size of an ellipse set as a two-dimensional interest curve. FIG. 18 is a diagram illustrating an ellipse set as a two-dimensional interest curve with the short axis as the rotation center. FIG. 19 is a diagram exemplifying a three-dimensional region of interest set in the scanning direction by rotating an ellipse as a two-dimensional interest curve with the major axis as the rotation axis. FIG. 20 is a diagram exemplifying a three-dimensional region of interest set in the swing direction by rotating an ellipse as a two-dimensional interest curve with the major axis as the center of rotation. FIG. 21 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the three-dimensional region of interest set in the third embodiment. FIG. 22 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the fourth embodiment. FIG. 23 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the fifth embodiment. FIG. 24 is a diagram for explaining the setting of the rotation axis when an arbitrary closed curve is set as the two-dimensional interest curve. FIG. 25 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the sixth embodiment. FIG. 26 is a diagram for explaining the setting of the rotation axis when a release closed curve is set as the two-dimensional interest curve. FIG. 27 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the seventh embodiment. FIG. 28 is a diagram for explaining a two-dimensional interest curve setting / changing process in the three-dimensional region-of-interest setting support process according to the eighth embodiment. FIG. 29 is a diagram for explaining a two-dimensional interest curve setting / changing process in the three-dimensional region-of-interest setting support process according to the eighth embodiment. FIG. 30 is a diagram for explaining the processing for setting / changing the positional relationship between the three-dimensional region of interest and the three orthogonal planes in the VOI coordinate system mode. FIG. 31 is a diagram for explaining the setting / changing process of the positional relationship between the three-dimensional region of interest and the orthogonal three cross sections in the VOI coordinate system mode. FIG. 32 is a diagram showing a modification of the display form after changing the three-dimensional region of interest in the VOI coordinate system mode. FIG. 33 is a diagram showing a process of changing the three-dimensional region of interest on the B surface. FIG. 34 is a diagram showing a process of changing the three-dimensional region of interest on the C plane.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, components having substantially the same function and configuration are denoted by the same reference numerals, and redundant description will be given only when necessary.

  FIG. 1 shows a block diagram of an ultrasonic diagnostic apparatus 1 according to this embodiment. As shown in the figure, the ultrasonic diagnostic apparatus 11 includes an ultrasonic probe 12, an input device 13, a monitor 14, an ultrasonic transmission unit 21, an ultrasonic reception unit 22, a B-mode processing unit 23, a Doppler processing unit 24, An image generation unit 25, an image memory 26, an image composition unit 27, a control processor (CPU) 28, an internal storage unit 29, and an interface unit 30 are provided. Hereinafter, the function of each component will be described.

  The ultrasonic probe 12 generates ultrasonic waves based on a drive signal from the ultrasonic transmission / reception unit 21, converts a reflected wave from the subject into an electric signal, and a matching layer provided in the piezoelectric vibrator. And a backing material for preventing the propagation of ultrasonic waves from the piezoelectric vibrator to the rear. When ultrasonic waves are transmitted from the ultrasonic probe 12 to the subject P, the transmitted ultrasonic waves are successively reflected by the discontinuous surface of the acoustic impedance of the body tissue and received by the ultrasonic probe 12 as an echo signal. . The amplitude of this echo signal depends on the difference in acoustic impedance at the discontinuous surface that is supposed to be reflected. In addition, the echo when the transmitted ultrasonic pulse is reflected by the moving blood flow or the surface of the heart wall depends on the velocity component in the ultrasonic transmission direction of the moving body due to the Doppler effect, and the frequency Receive a shift.

  Note that the ultrasonic probe 12 included in the ultrasonic diagnostic apparatus is capable of ultrasonically scanning a three-dimensional region of a subject. Therefore, the ultrasonic probe 12 has a configuration in which the transducer is mechanically swung along the direction orthogonal to the arrangement direction and ultrasonically scans a three-dimensional region, or a two-dimensionally arranged two-dimensional vibration element. It has a configuration in which a three-dimensional region is ultrasonically scanned by electrical control. When the former configuration is adopted, since the three-dimensional scanning of the subject is performed by an oscillation circuit (oscillation mechanism), the examiner automatically makes a plurality of two-dimensional scans simply by bringing the probe body into contact with the subject. A tomographic image can be acquired. The exact distance between the sections can also be detected from the controlled rocking speed. When the latter configuration is adopted, in principle, a three-dimensional region can be ultrasonically scanned in the same time as acquiring a conventional two-dimensional tomographic image. In the present embodiment, for the sake of concrete explanation, it is assumed that the ultrasonic probe 12 ultrasonically scans a three-dimensional region by mechanical rocking.

  The input device 13 is connected to the main body of the ultrasonic diagnostic apparatus 11, and various switches for incorporating various instructions, conditions, region of interest (ROI) setting instructions, various image quality condition setting instructions, etc. from the operator into the apparatus main body 11. , Buttons, trackball, mouse, keyboard and so on. For example, when the operator operates the end button or the FREEZE button of the input device 13, the transmission / reception of the ultrasonic wave is ended, and the ultrasonic diagnostic apparatus is temporarily stopped.

  Based on the video signal from the image generation unit 25, the monitor 14 is morphological information (normal B-mode image) in the living body, blood flow information (average velocity image, dispersion image, power image, etc.), wide-area ultrasonic wave. An image, a narrow-area ultrasonic image, an arbitrary cross-sectional ultrasonic image, and the like are displayed in a predetermined form.

  The ultrasonic transmission unit 21 includes a trigger generation circuit, a delay circuit, a pulsar circuit, and the like (not shown). In the pulsar circuit, a rate pulse for forming a transmission ultrasonic wave is repeatedly generated at a predetermined rate frequency fr Hz (period: 1 / fr second). Further, in the delay circuit, a delay time necessary for focusing the ultrasonic wave into a beam shape for each channel and determining the transmission directivity is given to each rate pulse. The trigger generation circuit applies a drive pulse to the probe 12 at a timing based on this rate pulse.

  The ultrasonic transmission unit 21 has a function capable of instantaneously changing a transmission frequency, a transmission drive voltage, and the like in order to execute a predetermined scan sequence in accordance with an instruction from the control processor 28. In particular, the change of the transmission drive voltage is realized by a linear amplifier type transmission circuit capable of instantaneously switching the value or a mechanism for electrically switching a plurality of power supply units.

  The ultrasonic receiving unit 22 has an amplifier circuit, an A / D converter, an adder and the like not shown. The amplifier circuit amplifies the echo signal captured via the probe 12 for each channel. In the A / D converter, a delay time necessary for determining the reception directivity is given to the amplified echo signal, and thereafter, an addition process is performed in the adder. By this addition, the reflection component from the direction corresponding to the reception directivity of the echo signal is emphasized, and a comprehensive beam for ultrasonic transmission / reception is formed by the reception directivity and the transmission directivity.

  The B-mode processing unit 23 receives the echo signal from the transmission / reception unit 21, performs logarithmic amplification, envelope detection processing, and the like, and generates data in which the signal intensity is expressed by brightness. This data is transmitted to the image generation unit 25 and is displayed on the monitor 14 as a B-mode image in which the intensity of the reflected wave is represented by luminance.

  The Doppler processing unit 24 performs frequency analysis on velocity information from the echo signal received from the transmission / reception unit 21, extracts blood flow, tissue, and contrast agent echo components due to the Doppler effect, and obtains blood flow information such as average velocity, dispersion, and power. Ask for multiple points.

  In general, the image generation unit 25 converts (scan converts) a scanning line signal sequence of an ultrasonic scan into a scanning line signal sequence of a general video format typified by a television or the like, and performs superconversion as a display image. A sonic diagnostic image is generated. The image generation unit 25 has a function as an image processing device, and executes predetermined processes executed in a three-dimensional region-of-interest setting support function to be described later according to control from the control processor 28.

  The image memory 26 temporarily stores an echo signal for each frame or each volume.

  The image synthesizing unit 27 synthesizes the image received from the image generating unit 25 together with character information of various parameters, scales, etc., and outputs it as a video signal to the monitor 14.

  The control processor 28 has a function as an information processing apparatus (computer) and controls the operation of the main body of the ultrasonic diagnostic apparatus. The control processor 28 reads out a dedicated program for realizing a later-described three-dimensional region-of-interest setting support function and a control program for executing a predetermined scan sequence from the internal storage unit 29 and expands them on its own memory. Performs computation and control related to various processes.

  The internal storage unit 29 stores a predetermined scan sequence for collecting a plurality of volume data with different field angle settings, a dedicated program for realizing a later-described three-dimensional region-of-interest setting support function, inspection information, and a two-dimensional interest curve. Initial condition table preliminarily associated with initial conditions used for setting, image generation, control program for executing display processing, diagnostic information (patient ID, doctor's findings, etc.), diagnostic protocol, transmission / reception conditions, body The mark generation program and other data groups are stored. Further, it is also used for storing images in the image memory 26 as necessary. Data in the internal storage unit 29 can also be transferred to an external peripheral device via the interface unit 30.

  The interface unit 30 is an interface related to the input device 13, a network, and a new external storage device (not shown). Data such as ultrasonic images and analysis results obtained by the apparatus can be transferred by the interface unit 30 to another apparatus via a network.

(3D region of interest setting support function)
Next, the three-dimensional region-of-interest setting support function that the ultrasonic diagnostic apparatus 1 has will be described. This function sets a curve (two-dimensional interest curve) having a desired shape and size at a desired position on a two-dimensional image when setting a three-dimensional region of interest in volume data. By using a curve, the setting of a simple and appropriate three-dimensional region of interest is supported.

  FIG. 2 is a flowchart showing a flow of processing (three-dimensional region-of-interest setting support processing) according to the three-dimensional region-of-interest setting support function. The contents of each process executed in the three-dimensional region-of-interest setting support process will be described with reference to FIG. In the following description, the case where the observation target is a fetus is taken as an example. However, this three-dimensional region-of-interest function is not limited to the case where the observation target is a fetus, and can also be applied to the case where a three-dimensional region of interest is set with an organ or the like as the observation target.

[Input of patient lyric, transmission / reception conditions, etc .: Step S1a]
Ultrasound over a predetermined period of time through a three-dimensional region including input of patient information (for example, patient ID) via the operation unit 33, transmission / reception conditions (view angle, focus position, transmission voltage, etc.), and observation target of the subject. Selection such as a scan sequence for scanning is executed (step S1a). Various information / conditions inputted and selected are automatically stored in the storage device 29.

[Three-dimensional ultrasonic scanning: Step S2a]
Next, the control processor 28 performs real-time three-dimensional ultrasonic scanning using the three-dimensional region including the observation target as the scanned region (step S2a). Specifically, for example, a three-dimensional region including a fetal face is ultrasonically scanned using a swing probe. By this ultrasonic scanning, echo signals for a three-dimensional region including the fetal face are collected.

  Each acquired echo signal is sequentially sent to the B-mode processing unit 23 via the ultrasonic wave receiving unit 22. The B mode processing unit 23 performs logarithmic amplification processing, envelope detection processing, and the like, and generates image data in which the signal intensity is expressed by luminance. The image generation unit 25 applies the volume data space coordinate system from the actual space coordinate system (that is, a coordinate system in which a plurality of scanning slice image data is defined) to the time-series image data for the generated three-dimensional area. The volume data is reconstructed by executing coordinate conversion to and performing interpolation processing.

[Generation / Display of 2D Image and 3D Image: Step S3a]
The image generation unit 25 uses the reconstructed volume data to generate an MPR image (two-dimensional image) corresponding to an arbitrary slice and a three-dimensional image as an initial image. The generated two-dimensional image and three-dimensional image are combined with predetermined character information in the image combining unit 27 and then displayed in parallel on the monitor 14 (step S3a).

  FIG. 3A shows a two-dimensional image displayed in this step, and FIG. 3B shows a three-dimensional image (volume rendering image) as an initial image displayed in this step. is there. Since an appropriate three-dimensional region of interest is not set in the initial image, it can be seen that the face of the fetus is depicted with a part of the nose missing as shown by the arrow in FIG. . When the two-dimensional image displayed as shown in FIG. 3A does not correspond to a desired cross section, it can be changed to a desired position by an operation from the input device 13 or the like, for example.

[Acquisition of initial conditions of two-dimensional interest curve / setting of two-dimensional interest curve: steps S4a, S5a]
Next, the control processor 28 acquires examination information including the pregnancy cycle of the patient and the head circumference measurement data of the fetus from the internal storage unit 29 or a database on the network based on the patient ID input in step S1a. To do. Further, the control processor 28 compares the acquired examination information with the initial condition table stored in the internal storage unit 29, and acquires an initial condition for setting a two-dimensional interest curve (step S4a). Further, the control processor 28 sets a two-dimensional interest curve on the two-dimensional image according to the acquired initial condition (step S5a).

  The initial condition for setting the two-dimensional interest curve is a condition for initializing the two-dimensional interest curve on the two-dimensional image. For example, if the two-dimensional interest curve is a perfect circle, The center position (coordinates), radius, etc. of the circle on the two-dimensional image.

[Change of two-dimensional interest curve: step S6a, step S7a]
Next, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6a). If it is determined to change, the input from the input device 13 is determined. In accordance with the instruction, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7a).

  FIG. 4 is a diagram for explaining the process of changing the position, shape, and size of the two-dimensional interest curve, and shows an example in which a perfect circle is set as the two-dimensional interest curve. In the figure, for example, the position of the perfect circle as the two-dimensional interest curve can be moved by moving the mouse cursor to the center O of the perfect circle and performing an operation such as drag and drop. Similarly, a perfect circle as a two-dimensional interest curve can be obtained by moving the mouse cursor to a desired position on the contour of the perfect circle (the position of the point A0 in FIG. 4) and moving it in the same radial direction by an operation such as drag and drop. The size of can be increased or decreased. In this case, in the three-dimensional image displayed as the initial image in step S3a, the face of the fetus is depicted with a part of the nose missing (see FIG. 3B). Therefore, the control processor 28 changes (expands) the two-dimensional curve of interest according to the instruction via the input device 13 so that the nose of the fetus is included in the perfect circle.

[Setting of a three-dimensional region of interest based on a two-dimensional interest curve: Step S8a]
Next, the control processor 28 sets a three-dimensional region of interest in the volume data by rotating the two-dimensional interest curve about a predetermined rotation axis (step S8a). There are no particular limitations on the position and orientation of the rotating shaft. As a typical example, a straight line passing through the center O of a perfect circle as a two-dimensional interest curve and having a predetermined direction (inclination), a point other than the center O in the perfect circle (eccentricity), and a predetermined direction (inclination) A straight line having a predetermined inclination, a tangent line of a perfect circle having a predetermined inclination, a straight line having a predetermined direction (inclination) that passes outside the perfect circle, and the like.

  FIG. 5 is a diagram illustrating a three-dimensional region of interest set in the scanning direction by rotating a perfect circle as a two-dimensional interest curve around a rotation axis passing through the center O. FIG. 6 is a diagram exemplifying a three-dimensional region of interest set in the swing direction by rotating a perfect circle as a two-dimensional interest curve about an axis passing through the center O. As shown in each drawing, a three-dimensional region of interest can be set on volume data using a perfect circle as a two-dimensional interest curve set on a two-dimensional image.

[Display of three-dimensional region of interest: Step S9a]
Next, the control processor 28 generates a three-dimensional region-of-interest image using data included in the set three-dimensional region of interest. The generated three-dimensional region-of-interest image is combined with predetermined character information or the like in the image combining unit 27, and then displayed in a predetermined form on the monitor 14 (step S9a).

  FIG. 7 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the set three-dimensional region of interest. When the three-dimensional image shown in FIG. 7 is compared with the initial image shown in FIG. 3B, in the three-dimensional image shown in FIG. It is drawn. This is because the two-dimensional interest curve is adjusted in step S7a so that the fetus nose is included, and the adjusted two-dimensional interest curve is used to set the three-dimensional region of interest.

  According to the ultrasonic diagnostic apparatus described above, a perfect circle as a two-dimensional interest curve having a desired shape and size is set at a desired position on a two-dimensional image included in the acquired volume data, By rotating the set perfect circle around a predetermined rotation axis, a three-dimensional region of interest is set for the volume data. Therefore, the operator adjusts and sets the position, shape, and size of the two-dimensional interest curve so that the observation target is included on the two-dimensional image, so that the three-dimensional region of interest can be easily and appropriately set for the volume data. Can be set.

(Second Embodiment)
The ultrasonic diagnostic apparatus according to the second embodiment does not perform initial setting of a two-dimensional interest curve using a database, for example, by designating a desired three points on a two-dimensional image, thereby obtaining a desired position and location. A two-dimensional interest curve is set by shape and size.

  FIG. 8 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the second embodiment. As shown in the figure, input of patient information (for example, patient ID, etc.), transmission / reception conditions (view angle, focal position, transmission voltage, etc.), and a three-dimensional region including the observation target of the subject are exceeded over a predetermined period. Selection such as a scan sequence for sonic scanning is executed (step S1b). Various information / conditions inputted and selected are automatically stored in the storage device 29.

  Next, the control processor 28 performs real-time three-dimensional ultrasonic scanning using the three-dimensional region including the observation target as the scanned region (step S2b). Further, volume data is reconstructed using the echo signal acquired by the three-dimensional ultrasonic scanning. The image generation unit 25 generates an MPR image (two-dimensional image) and a three-dimensional image corresponding to an arbitrary slice using the reconstructed volume data. The generated two-dimensional image and three-dimensional image are combined with predetermined character information in the image combining unit 27 and then displayed in parallel on the monitor 14 (step S3b).

  FIG. 9 is a diagram showing a three-dimensional image (volume rendering image) as an initial image displayed in this step. In the initial image, as indicated by an arrow in FIG. 9, since an appropriate three-dimensional region of interest is not set, the region including the fetal face is depicted in a state where the right hand is not visible and the periphery of the left eye is not clear. .

  Next, the control processor 28 sets a perfect circle as a two-dimensional interest curve based on the desired three points designated via the input device 13 (step S4b). That is, for the two-dimensional image displayed in step S3b, for example, three points A1, A2, and A3 as shown in FIG. 10 are set through the input device 13 by the user. The control processor 28 calculates the center position and radius of a perfect circle that passes through the set three points A1, A2, and A3. As shown in FIG. 10, on the two-dimensional image, A1, A2, and A3. A perfect circle passing through the three points is set as a two-dimensional interest curve (step S5b).

  Further, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6b). When it is determined to change, the input instruction from the input device 13 is determined. Accordingly, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7b). For example, as shown in FIG. 10, the position of a perfect circle as a two-dimensional interest curve can be moved by, for example, dragging and dropping the mouse cursor to the center O of the perfect circle and performing operations such as drag and drop. Similarly, it is possible to increase or decrease the radius of the perfect circle as the two-dimensional curve of interest by moving the mouse cursor to the desired position on the contour of the true circle and moving it in the same radial direction. Further, it is possible to reset the two-dimensional interest curve by resetting the set perfect circle by a predetermined operation and setting again at least three points on the two-dimensional image.

  Next, the control processor 28 sets a three-dimensional region of interest in the volume data by rotating the two-dimensional interest curve around a predetermined rotation axis (step S8b). A three-dimensional region of interest viewed from the scanning direction is shown in FIG. 11, and a three-dimensional region of interest viewed from the swing direction is shown in FIG. The control processor 28 generates a three-dimensional region-of-interest image using data included in the set three-dimensional region of interest.

  The generated three-dimensional region-of-interest image is combined with predetermined character information or the like in the image combining unit 27, and then displayed in a predetermined form on the monitor 14 (step S9b).

  FIG. 13 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the set three-dimensional region of interest. Comparing the three-dimensional image shown in FIG. 13 with the initial image shown in FIG. 9, in the three-dimensional image shown in FIG. 9, the face of the fetus is clearly shown around the right hand and left eye as indicated by arrows. The area containing is drawn. This is because in Steps S4b and 5b, three points are set so that the nose of the fetus is included, and a three-dimensional region of interest is set using a two-dimensional interest curve that passes through the three points.

  According to the configuration described above, by appropriately specifying the three points while observing the two-dimensional image, it is possible to easily and reliably set a perfect circle that surely includes the observation target as the two-dimensional interest curve. it can. Further, the three-dimensional region of interest is set for the volume data by rotating the perfect circle set in this way around a predetermined rotation axis. Therefore, the operator can easily and appropriately adjust the volume data by adjusting and setting the position, shape, and size of the three-point or two-dimensional interest curve so that the observation target is included in the two-dimensional image. A three-dimensional region of interest can be set.

(Third embodiment)
The third embodiment employs an ellipse as another example of the two-dimensional interest curve.

  FIG. 14 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the third embodiment. As shown in the figure, input of patient information (for example, patient ID, etc.), transmission / reception conditions (view angle, focal position, transmission voltage, etc.), and a three-dimensional region including the observation target of the subject are exceeded over a predetermined period. Selection such as a scan sequence for sonic scanning is executed (step S1c). Various information / conditions inputted and selected are automatically stored in the storage device 29.

  Next, the control processor 28 performs real-time three-dimensional ultrasonic scanning using the three-dimensional region including the observation target as the scanned region (step S2c). Further, volume data is reconstructed using the echo signal acquired by the three-dimensional ultrasonic scanning. The image generation unit 25 generates an MPR image (two-dimensional image) and a three-dimensional image corresponding to an arbitrary slice using the reconstructed volume data. The generated two-dimensional image and three-dimensional image are combined with predetermined character information in the image combining unit 27 and then displayed in parallel on the monitor 14 (step S3c).

  FIG. 15 is a diagram showing a three-dimensional image (volume rendering image) as an initial image displayed in this step. In the initial image, as indicated by an arrow in FIG. 15, since an appropriate three-dimensional region of interest is not set, a region including the fetal face is depicted in a state where the uterine structure is known but the right hand is not visible.

  Next, the control processor 28 obtains examination information including the pregnancy cycle of the patient and the head circumference measurement data of the fetus from the internal storage unit 29 or a database on the network based on the patient ID input in step S1c. To do. Further, the control processor 28 compares the acquired examination information with the initial condition table stored in the internal storage unit 29, and acquires an initial condition for setting an ellipse as a two-dimensional interest curve (step S4c). In accordance with the initial conditions, an ellipse is set on the two-dimensional image (step S5c). The initial conditions here are the center position (coordinates) of the ellipse on the two-dimensional image, the major axis radius (major radius), the minor axis radius ( Short radius).

  Next, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6c). If it is determined to change, the input from the input device 13 is determined. In accordance with the instruction, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7c).

  Next, the control processor 28 sets a rotation axis for rotating the ellipse as the two-dimensional interest curve, and sets the three-dimensional region of interest in the volume data by rotating the ellipse around the rotation axis (step S8c). ). A typical example of the rotation axis for rotating the ellipse is a short axis or a long axis as shown in FIG. However, it is not configured in this example. For example, a straight line that passes through a point (eccentricity) other than the center O in the ellipse and has a predetermined orientation (inclination), an tangent of an ellipse having a predetermined inclination, passes outside the ellipse, and It is also possible to adopt a straight line having a direction (tilt). In addition to the setting of the rotation axis, in accordance with an input instruction from the input device 13, for example, as shown in FIG. 17, the center position of the ellipse can be moved, the orientation or size of the ellipse can be changed, and the like. As a result of these operations, for example, an ellipse E and a rotation axis Ax (short axis in the case of the figure) as shown in FIG. 18 can be set. The three-dimensional region of interest viewed from the scanning direction is shown in FIG. 19, and the three-dimensional region of interest viewed from the swing direction is shown in FIG.

  The control processor 28 generates a three-dimensional region-of-interest image using data included in the set three-dimensional region of interest. The generated three-dimensional region-of-interest image is combined with predetermined character information or the like in the image combining unit 27 and then displayed in a predetermined form on the monitor 14 (step S9c).

  FIG. 21 is a diagram illustrating a three-dimensional image (volume rendering image) generated using data included in the set three-dimensional region of interest. Comparing the three-dimensional image shown in FIG. 15 with the initial image shown in FIG. 21, in the three-dimensional image shown in FIG. 21, the face of the right hand and the fetus are more clearly depicted as indicated by arrows. This is because, in step S7c, the two-dimensional interest curve is adjusted so that the nose of the fetus is included, and the three-dimensional region of interest is set using the adjusted two-dimensional interest curve.

  According to the ultrasonic diagnostic apparatus described above, an ellipse as a two-dimensional interest curve having a desired shape and size is set at a desired position on the two-dimensional image included in the acquired volume data, By rotating the set ellipse around a predetermined rotation axis, a three-dimensional region of interest is set for the volume data. Therefore, the operator adjusts and sets the position, shape, and size of the two-dimensional interest curve so that the observation target is included on the two-dimensional image, so that the three-dimensional region of interest can be easily and appropriately set for the volume data. Can be set.

(Fourth embodiment)
In the fourth embodiment, an initial setting of an ellipse as a two-dimensional interest curve using a database is not performed, for example, by specifying at least three desired points on a two-dimensional image, a desired position can be obtained at a desired position. A two-dimensional interest curve is set by shape and size.

  FIG. 22 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the fourth embodiment. When comparing the flowcharts shown in FIGS. 22 and 14, the processes of steps S4d and S5d are mainly different. Hereinafter, the contents of the processing in steps S4d and S5d will be described.

  For the two-dimensional image displayed in step S3d, three points are also designated at desired positions via the input device 13 (step S4d). The control processor 28 calculates the center position, long radius, and short radius of the ellipse that passes through the set three points, and sets the ellipse that passes through the three points designated on the two-dimensional image as a two-dimensional interest curve. (Step S5d).

  According to the configuration described above, an ellipse that reliably includes an observation target can be easily and reliably set as a two-dimensional interest curve by appropriately designating three points while observing a two-dimensional image. . Further, by rotating the ellipse set in this way around a predetermined rotation axis, a three-dimensional region of interest is set for the volume data. Therefore, the operator can easily and appropriately adjust the volume data by adjusting and setting the position, shape, and size of the three-point or two-dimensional interest curve so that the observation target is included in the two-dimensional image. A three-dimensional region of interest can be set.

(Fifth embodiment)
The fifth embodiment does not use a closed curve (curve forming a specific closed region) having a predetermined shape such as a perfect circle or an ellipse as a two-dimensional interest curve, and displays a closed curve having a shape desired by the operator at a desired position. The size is set on a two-dimensional image as a two-dimensional interest curve, and this is used to set a three-dimensional region of interest.

  FIG. 23 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the fifth embodiment. As shown in the figure, input of patient information, transmission / reception conditions, selection of a scan sequence for ultrasonic scanning, and the like are executed (step S1e). Ultrasonic scanning is executed (step S2e). Further, volume data is reconstructed using the echo signal acquired by the three-dimensional ultrasonic scanning. The image generation unit 25 generates an MPR image (two-dimensional image) and a three-dimensional image corresponding to an arbitrary slice using the reconstructed volume data. The generated two-dimensional image and three-dimensional image are combined with predetermined character information in the image combining unit 27 and then displayed in parallel on the monitor 14 (step S3e).

  Next, for the displayed two-dimensional image, an arbitrary closed curve having a desired shape and size is designated as a two-dimensional interest curve at a desired position via the input device 13 (step S4e). The control processor 28 sets the closed curve designated via the input device 13 on the two-dimensional image (step S5e).

  Next, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6e). If it is determined to change, the input from the input device 13 is determined. In accordance with the instruction, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7e).

  Next, a straight line as a rotation axis is designated at a desired position via the input device 13 for the displayed two-dimensional image. The control processor 28 sets a rotation axis based on the specified straight line and the like, and sets a three-dimensional region of interest in the volume data by rotating an arbitrary closed curve around the rotation axis (step S8e). In addition, what kind of thing may be sufficient as the rotating shaft which rotates an arbitrary closed curve. As a specific example, as shown in FIG. 24, for example, the axis Ax1 passing near the central portion of the arbitrary closed curve CL, the axis Ax2 passing through the region outside the central portion of the arbitrary closed curve CL, and not passing through the arbitrary closed curve CL. Axis Ax3 etc. can be mentioned.

  The control processor 28 generates a three-dimensional region-of-interest image using data included in the set three-dimensional region of interest. The generated three-dimensional region-of-interest image is combined with predetermined character information in the image combining unit 27 and then displayed in a predetermined form on the monitor 14 (step S9e).

  According to the ultrasonic diagnostic apparatus described above, an arbitrary closed curve as a two-dimensional interest curve having a desired shape and size is set at a desired position on the two-dimensional image included in the acquired volume data. The three-dimensional region of interest is set for the volume data by rotating the set closed curve around a predetermined rotation axis. Therefore, the operator adjusts and sets the position, shape, and size of the two-dimensional interest curve so that the observation target is included on the two-dimensional image, so that the three-dimensional region of interest can be easily and appropriately set for the volume data. Can be set.

(Sixth embodiment)
The sixth embodiment employs a curve (release curve) that does not form a closed region without using a curve (closed curve) that forms a closed region such as a perfect circle or an ellipse as a two-dimensional interest curve.

  FIG. 25 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the sixth embodiment. When the flowchart shown in FIG. 25 is compared with the flowchart shown in FIG. 23, the processing after step S4f is different. Hereinafter, the content of each process after step S4f is demonstrated.

  For the displayed two-dimensional image, an arbitrary release curve having a desired shape and size is designated as a two-dimensional interest curve at a desired position via the input device 13 (step S4f). For example, as shown in FIG. 26, the control processor 28 sets the release curve OL designated via the input device 13 on the two-dimensional image (step S5f).

  Next, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6f). If it is determined to change, the input from the input device 13 is determined. In accordance with the instruction, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7f).

  Next, a straight line as a rotation axis is designated at a desired position via the input device 13 for the displayed two-dimensional image. The control processor 28 sets a rotation axis based on the specified straight line and the like, and sets a three-dimensional region of interest in the volume data by rotating the release curve around the rotation axis (step S8e).

  Here, any rotation axis for rotating the release curve may be used. As a specific example, for example, as shown in FIG. 26, a rotation axis Ax4 corresponding to a straight line connecting the start point and end point of the release curve OL, and a straight line that intersects at least one point (two points in the example of FIG. 26) with the release curve OL. Examples thereof include a corresponding rotation axis Ax5, a rotation axis Ax6 corresponding to a straight line having no intersection with the release curve OL. In the case of using the rotation axis Ax5 or the rotation axis Ax6, the rotation passing region of the closed curve formed by the release curve, the perpendicular drawn from the start point and the end point of the release curve to the rotation axis, and the rotation axis is three-dimensional. It becomes an area of interest.

  The control processor 28 generates a three-dimensional region-of-interest image using data included in the set three-dimensional region of interest. The generated three-dimensional region-of-interest image is combined with predetermined character information in the image combining unit 27 and then displayed in a predetermined form on the monitor 14 (step S9f).

  According to the ultrasonic diagnostic apparatus described above, an arbitrary release curve as a two-dimensional interest curve having a desired shape and size is set at a desired position on the two-dimensional image included in the acquired volume data. Then, a three-dimensional region of interest is set for the volume data by rotating the set release curve around a predetermined rotation axis. Therefore, the operator adjusts and sets the position, shape, and size of the two-dimensional interest curve so that the observation target is included on the two-dimensional image, so that the three-dimensional region of interest can be easily and appropriately set for the volume data. Can be set.

(Seventh embodiment)
Each of the above-described embodiments has a configuration in which a two-dimensional interest curve is set using an MPR image generated from volume data acquired by three-dimensional scanning. In contrast, the three-dimensional region-of-interest setting support function according to the present embodiment acquires a two-dimensional image corresponding to a desired cross section in the previous stage of three-dimensional scanning, and sets a two-dimensional interest curve on the two-dimensional image. Is. Note that such a two-dimensional interest curve setting method according to this embodiment can be applied to any of the first to sixth embodiments described above. Hereinafter, in order to make the description more specific, the case where it is applied to the three-dimensional region-of-interest setting support function according to the first embodiment will be described.

  FIG. 27 is a flowchart showing the flow of the three-dimensional region-of-interest setting support process according to the seventh embodiment. As shown in the figure, ultrasonic scanning is performed on a two-dimensional region used for inputting patient information (for example, patient ID), transmission / reception conditions (view angle, focal position, transmission voltage, etc.), and setting a two-dimensional interest curve. The scan sequence, the scan sequence for ultrasonically scanning the three-dimensional region including the observation target of the subject over a predetermined period, and the like are executed (step S1g). Various information / conditions inputted and selected are automatically stored in the storage device 29.

  Next, the control processor 28 performs real-time two-dimensional ultrasonic scanning using the two-dimensional region including the observation target as the scanned region (step S2g). Further, a desired two-dimensional image is generated using the echo signal acquired by the two-dimensional ultrasonic scanning, and is displayed on the monitor 14 together with predetermined character information and the like (step S3g).

  Next, the control processor 28 obtains examination information including the pregnancy cycle of the patient and the head circumference measurement data of the fetus from the internal storage unit 29 or a database on the network based on the patient ID input in step S1g. To do. In addition, the control processor 28 compares the acquired examination information with the initial condition table stored in the internal storage unit 29, and sets initial conditions (circle center position (coordinates), radius) for setting the two-dimensional interest curve. Is obtained (step S4g), and a two-dimensional interest curve is set on the two-dimensional image according to the obtained initial condition (step S5g).

  Next, the control processor 28 determines whether or not to change the position, shape, and size of the set two-dimensional interest curve (step S6g). If it is determined to change, the input from the input device 13 is determined. In accordance with the instruction, at least one of the position, shape, and size of the two-dimensional interest curve is changed (step S7g).

  Next, the control processor 28 performs real-time three-dimensional ultrasonic scanning using the three-dimensional region including the observation target as the scanned region (step S8g). Further, volume data is reconstructed using the echo signal acquired by the three-dimensional ultrasonic scanning. The control processor 28 associates the position of the two-dimensional image in which the two-dimensional interest curve is set and the volume data, and rotates the two-dimensional interest curve around a predetermined rotation axis, thereby obtaining the three-dimensional interest in the volume data. An area is set (step S9g). The generated three-dimensional region-of-interest image is combined with predetermined character information and the like in the image combining unit 27 and then displayed in a predetermined form on the monitor 14 (step S10g).

  According to the configuration described above, after acquiring a two-dimensional image corresponding to a desired cross-section, it is possible to easily and reliably set a two-dimensional interest curve on the two-dimensional image so that the observation target is surely included. Can do. Further, the three-dimensional region of interest is set for the volume data by rotating the perfect circle set in this way around a predetermined rotation axis. Therefore, the operator adjusts and sets the position, shape, and size of the two-dimensional interest curve so that the observation target is included on the two-dimensional image, so that the three-dimensional region of interest can be easily and appropriately set for the volume data. Can be set.

(Eighth embodiment)
In the eighth embodiment, at a desired timing after the three-dimensional region of interest is set using the two-dimensional region of interest, between the three orthogonal cross sections (A surface, B surface, C surface) and the three-dimensional region of interest. It is possible to have an interface that can set and adjust the positional relationship more appropriately. Such an interface is particularly useful when performing detailed image observation later using a medical image reference device (viewer) or the like. The three-dimensional interest curve adjustment method using the interface according to the present embodiment can be applied to any of the first to seventh embodiments described above.

  The setting / changing of the positional relationship between the three-dimensional region of interest and the orthogonal three cross-sections using the interface according to the present embodiment is either an observation mode of a general coordinate system mode or a VOI (Volume of Interest) coordinate system mode. It is executed using The operator can freely select any observation mode. In addition, switching from one mode to the other mode can be performed at an arbitrary timing. Hereinafter, the setting / changing process of the positional relationship between the three-dimensional region of interest and the three orthogonal cross sections in each observation mode will be described.

(General coordinate system mode)
In the general coordinate system mode, even if the three-dimensional region of interest is moved by conversion, the observation position and the observation direction for generating three orthogonal cross sections (A plane, B plane, C plane) are not changed. This mode is not allowed.

  FIG. 28 is a diagram for explaining processing for setting / changing the positional relationship between the three-dimensional region of interest and the orthogonal three cross sections in the general coordinate system mode. The orthogonal three cross sections (A surface, B surface, It is the figure which showed an example of the three-dimensional region of interest (sphere) displayed by (C surface), and the three-dimensional image (volume rendering image) corresponding to the said three-dimensional region of interest. As shown in the figure, by operating the input device 13, for example, the cross section (perfect circle) of the three-dimensional region of interest on the A plane is brought to a desired position at a desired size (in the example of FIG. 28, the size of the solid line)・ Change from position to dotted line size / position). In response to the change operation on the A plane, the control processor 28 calculates the size and position of the changed three-dimensional region of interest in the volume data, and the three-dimensional region of interest on each of the B and C planes. Change the size and position of the cross section (perfect circle). Further, the control processor 28 generates a 3D image using the data in the changed 3D region of interest in conjunction with the change of the 3D region of interest, and displays it together with the 2D image corresponding to each cross section. . As a result, in each of the A plane, the B plane, and the C plane, the three-dimensional region of interest changes from the form of the solid line before the change to the state after the change indicated by the dotted line.

  FIG. 29 is a diagram for explaining the process of setting / changing the positional relationship between the three-dimensional region of interest and the orthogonal three slices in the general coordinate system mode, and the cubic displayed by the orthogonal three slices based on the MPR image. It is the figure which showed the other example of the three-dimensional image (volume rendering image) corresponding to the original region of interest (spheroid) and the said three-dimensional region of interest. As shown in the figure, by the operation from the input device 13, for example, the cross section (ellipse) of the three-dimensional region of interest on the A plane is moved to a desired position in a desired size and orientation (in the example of FIG. Suppose you change the size / direction / position of the dotted line to the size / direction / position of the dotted line. In response to the change operation on the A plane, the control processor 28 calculates the size and position of the changed three-dimensional region of interest in the volume data, and the three-dimensional region of interest on each of the B and C planes. Change the size and position of the cross section (ellipse). Further, the control processor 28 generates a 3D image using the data in the changed 3D region of interest in conjunction with the change of the 3D region of interest, and displays it together with the 2D image corresponding to each cross section. . Result, A side, B side. In each of the C planes, the three-dimensional region of interest changes from the form of the solid line before the change to the state after the change indicated by the dotted line.

(VOI coordinate system mode)
In the VOI coordinate system mode, when the three-dimensional region of interest is moved by conversion, the observation position and the observation direction for generating three orthogonal cross sections (A plane, B plane, C plane) are also moved by the same conversion. .

  30 and 31 are diagrams for explaining processing for setting / changing the positional relationship between the three-dimensional region of interest and the orthogonal three cross sections in the VOI coordinate system mode. In each figure, the three orthogonal cross sections before the change are (A1, B1, C1), and the three orthogonal cross sections after the change are (A2, B2, C2). However, since the examples in FIGS. 30 and 31 show the changing process on the A cross section, the A1 plane and the A2 plane are the same.

  As shown in FIG. 30, it is assumed that the position, size, shape, and the like of the cross section (ellipse) of the three-dimensional region of interest indicated by the solid line on the A1 plane are changed to be indicated by the dotted line by the operation from the input device 13, for example. . In response to the change operation on the A1 plane, the control processor 28 calculates each size and position of the changed three-dimensional region of interest in the volume data. Further, the control processor 28 changes the observation position and the observation direction with respect to the remaining two cross sections (B1 surface, C1 surface) to the B2 surface and the C2 surface corresponding to the moved A1 surface, respectively, and the B2 surface, C2 The size and position of the cross section (ellipse) of the three-dimensional region of interest in each of the surfaces is changed. Further, the control processor 28 generates a three-dimensional image using the data in the changed three-dimensional region of interest in conjunction with the change of the three-dimensional region of interest, and also changes each observation position and each observation direction. Is used to generate a two-dimensional image corresponding to each cross section and display it in the form as shown in FIG. 31, for example.

  In the general coordinate system mode, for example, as shown in FIG. 29, even if the origin is moved and the coordinate axis is rotated as shown by the dotted line in the A plane, the remaining two sections (B plane, C plane) The observation position and the observation direction are maintained as before the movement. Therefore, for example, when the fetus is in the state shown in the upper left A plane image in FIG. 30, even if the three-dimensional region of interest is changed to a suitable size and position on the A plane, Only the lower body can be observed in the C-plane image.

  On the other hand, in the VOI coordinate system mode, as can be seen by comparing FIG. 30 and FIG. 31, even after the movement of the three-dimensional region of interest on the A plane, the remaining three-dimensional interest on the B and C planes. The shape of the region does not change, and the region of interest is a three-dimensional region of interest from the same three directions before and after the change. This is because, when the VOI coordinate system mode moves the origin and rotates the coordinate axis in the A plane, the observation positions and observation directions of the remaining two cross sections are also moved corresponding to the A plane after the movement. is there. Therefore, for example, when the fetus is in a state as shown in the upper left A plane image of FIG. 30, the fetal whole body image is suitably observed with the A2 plane image and the C2 plane image, and the fetal head image is preferably observed with the B2 plane image. be able to.

  The display form after the change of the three-dimensional region of interest in the VOI coordinate system mode is not limited to the example shown in FIG. For example, as shown in FIG. 32, it is possible to display the changed three-dimensional region of interest so that it is always in a horizontal state.

  Moreover, in the said example, the change process of the three-dimensional region of interest accompanying both an origin movement and the rotational movement of a coordinate axis was illustrated in A surface. Of course, the above method can also be applied to the process of changing the three-dimensional region of interest involving only the origin movement or only the rotational movement of the coordinate axes. Further, as a matter of course, the three-dimensional region-of-interest changing process can be executed not only on the A plane but also on each of the B and C planes. FIG. 33 illustrates the three-dimensional region-of-interest changing process on the B-plane, and FIG. 34 illustrates the three-dimensional region-of-interest changing process on the C-plane.

  According to the configuration described above, the position, size, orientation, shape, etc. of the three-dimensional region of interest set using the two-dimensional interest curve are expressed using three orthogonal cross sections (A plane, B plane, C plane). , It can be easily and accurately visually recognized at a desired timing. In addition, after viewing, if you want to change the position, size, orientation, shape, etc. of the 3D region of interest, change the position, size, orientation, shape, etc. of the cross section of the 3D region of interest in any MPR image. By simply doing this, the three-dimensional region of interest can be reset easily and appropriately for the volume data.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Specific examples of modifications are as follows.

  (1) Each function according to the present embodiment can also be realized by installing a program for executing the processing in a computer such as a workstation and developing the program on a memory. At this time, a program capable of causing the computer to execute the technique is stored in a recording medium such as a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a semiconductor memory. It can also be distributed.

  (2) In the above embodiments, the configuration in which the three-dimensional region-of-interest setting support process is performed using the ultrasonic image output from the image generation unit 25 (that is, the ultrasonic image after scan conversion) has been described. However, the target ultrasonic image data is not limited to the data after the scan conversion, and may be the raw data before the scan conversion. In such a case, the same effect can be achieved by using the magnitude of the signal value instead of the luminance value.

  (3) In each of the above-described embodiments, the case where a three-dimensional region of interest is set using the three-dimensional region-of-interest setting support function is taken as an example for the volume data acquired using the ultrasonic diagnostic apparatus. However, the setting of the three-dimensional region of interest using the three-dimensional region-of-interest setting support function is not limited to the ultrasonic diagnostic apparatus, and other medical image diagnostic apparatuses such as an X-ray computed tomography apparatus, a magnetic resonance imaging apparatus It can also be realized for volume data acquired using an X-ray diagnostic apparatus, a nuclear medicine diagnostic apparatus, or the like. Further, the present invention is not limited to the medical image diagnostic apparatus, and can also be realized by an ultrasonic image processing apparatus and a medical image processing apparatus realized by a medical workstation using volume data acquired in advance.

  In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  As described above, according to the present invention, for example, when displaying a three-dimensional image using volume data acquired by an ultrasonic diagnostic apparatus or the like, an ultrasonic diagnostic apparatus for supporting simple and appropriate setting of a three-dimensional region of interest. An ultrasonic image processing apparatus, a medical image diagnostic apparatus, and a medical image processing apparatus can be realized.

DESCRIPTION OF SYMBOLS 10 ... Ultrasonic diagnostic apparatus, 12 ... Ultrasonic probe, 13 ... Input device, 14 ... Monitor, 21 ... Ultrasonic transmission unit, 22 ... Ultrasonic reception unit, 23 ... B mode processing unit, 24 ... Doppler processing unit, 25 ... Image generation unit, 26 ... Image memory, 27 ... Image composition unit, 28 ... Control processor, 29 ... Internal storage unit, 30 ... Interface unit

Claims (11)

A transmission / reception means for transmitting an ultrasonic wave to a three-dimensional region including an observation target in a subject, receiving a reflected wave from the three-dimensional region, and acquiring an echo signal related to the three-dimensional region;
Data acquisition means for acquiring volume data related to the three-dimensional region using echo signals related to the three-dimensional region;
Wherein according to the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image concerning the two-dimensional area included in the three-dimensional region, and the curve setting means for setting an elliptical shape or a perfect circular shape ,
A region of interest setting means for setting a three-dimensional region of interest for the volume data using a closed region obtained by rotating the set elliptical shape or perfect circle shape ;
Image generating means for generating an orthogonal three-section image relating to the three orthogonal sections of the set three-dimensional region of interest;
Display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest;
Input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest for any of the displayed three orthogonal cross sections;
When the change instruction is input, according to the instruction, the position, size, and shape of the three-dimensional region of interest, and an observation position regarding two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections And a curve changing means for changing the observation direction,
The image generation means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction;
An ultrasonic diagnostic apparatus characterized by the above. The observation object is a fetus,
The examination information includes a pregnancy cycle;
The ultrasonic diagnostic apparatus according to claim 1. The observation object is a fetus,
The examination information includes head circumference measurement data of the subject;
The ultrasonic diagnostic apparatus according to claim 1. The observation object is an organ,
The examination information includes measurement data relating to the organ;
The ultrasonic diagnostic apparatus according to claim 1. The transmission / reception means transmits an ultrasonic wave to a two-dimensional region included in the three- dimensional region, receives a reflected wave from the two-dimensional region, and acquires an echo signal related to the two-dimensional region,
The data acquisition means uses the echo signal related to the two-dimensional region to acquire two-dimensional image data related to the two-dimensional region,
The curve setting means, by using the two-dimensional image generated using the two-dimensional image data, to set the elliptical shape or perfect circle shape ;
The ultrasonic diagnostic apparatus according to any one of claims 1 to 4, wherein: The curve setting means sets the elliptical shape or the perfect circular shape using an MPR image generated using the volume data as the two-dimensional image. The ultrasonic diagnostic apparatus according to claim 1. Before SL region of interest setting means, the oval shape or curve having a circular shape is rotated about a straight line contained in the two-dimensional image, obtaining the closed area,
The ultrasonic diagnostic apparatus according to claim 1, wherein: The curve setting means changes at least one of the position, size, and shape of the elliptical shape or perfect circular shape according to an input instruction from a user.
The ultrasonic diagnostic apparatus according to any one of claims 1 to 7 , wherein: Storage means for storing volume data relating to the three-dimensional region acquired by ultrasonic scanning a three-dimensional region including an observation target in the subject;
Wherein according to the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image concerning the two-dimensional area included in the three-dimensional region, and the curve setting means for setting an elliptical shape or a perfect circular shape ,
A region of interest setting means for setting a three-dimensional region of interest for the volume data using a closed region obtained by rotating the set elliptical shape or perfect circle shape ;
Image generating means for generating an orthogonal three-section image relating to the three orthogonal sections of the set three-dimensional region of interest;
Display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest;
Input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest for any of the displayed three orthogonal cross sections;
When the change instruction is input, according to the instruction, the position, size, and shape of the three-dimensional region of interest, and an observation position regarding two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections And a curve changing means for changing the observation direction,
The image generation means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction;
An ultrasonic image processing apparatus. Data acquisition means for acquiring volume data relating to a three-dimensional region including an observation target in the subject;
Wherein according to the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image concerning the two-dimensional area included in the three-dimensional region, and the curve setting means for setting an elliptical shape or a perfect circular shape ,
A region of interest setting means for setting a three-dimensional region of interest for the volume data using a closed region obtained by rotating the set elliptical shape or perfect circle shape ;
Image generating means for generating an orthogonal three-section image relating to the three orthogonal sections of the set three-dimensional region of interest;
Display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest;
Input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest for any of the displayed three orthogonal cross sections;
When the change instruction is input, according to the instruction, the position, size, and shape of the three-dimensional region of interest, and an observation position regarding two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections And a curve changing means for changing the observation direction,
The image generation means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction;
A medical image diagnostic apparatus characterized by the above. Storage means for storing volume data relating to a three-dimensional region including an observation target in a subject obtained using a medical image diagnostic apparatus;
Wherein according to the examination information of the subject obtained in advance with at least three points specified by the user on the two-dimensional image concerning the two-dimensional area included in the three-dimensional region, and the curve setting means for setting an elliptical shape or a perfect circular shape ,
A region of interest setting means for setting a three-dimensional region of interest for the volume data using a closed region obtained by rotating the set elliptical shape or perfect circle shape ;
Image generating means for generating an orthogonal three-section image relating to the three orthogonal sections of the set three-dimensional region of interest;
Display means for displaying an orthogonal three-section image relating to the set three-dimensional region of interest;
Input means for inputting a change instruction for the position, size, and shape of the three-dimensional region of interest for any of the displayed three orthogonal cross sections;
When the change instruction is input, according to the instruction, the position, size, and shape of the three-dimensional region of interest, and an observation position regarding two cross sections other than the cross section in which the change instruction is input among the three orthogonal cross sections And a curve changing means for changing the observation direction,
The image generation means generates a new orthogonal three-section image using the changed three-dimensional region of interest and the changed observation position and observation direction;
A medical image processing apparatus.