WO2006059668A1 - 超音波装置、超音波撮像プログラム及び超音波撮像方法 - Google Patents
超音波装置、超音波撮像プログラム及び超音波撮像方法 Download PDFInfo
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- WO2006059668A1 WO2006059668A1 PCT/JP2005/022056 JP2005022056W WO2006059668A1 WO 2006059668 A1 WO2006059668 A1 WO 2006059668A1 JP 2005022056 W JP2005022056 W JP 2005022056W WO 2006059668 A1 WO2006059668 A1 WO 2006059668A1
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- ultrasonic
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- probe
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
- A61B8/14—Echo-tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/42—Details of probe positioning or probe attachment to the patient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/483—Diagnostic techniques involving the acquisition of a 3D volume of data
Definitions
- Ultrasonic apparatus Ultrasonic imaging program, and ultrasonic imaging method
- the present invention relates to an ultrasonic imaging technique for rendering a region of interest of a subject in an ultrasonic image.
- An ultrasonic device that captures an ultrasonic image of a subject supplies a driving signal for transmission to an ultrasonic probe and transmits the ultrasonic wave to the subject, and the reflection generated by the subject force.
- the echo is received by the ultrasonic probe, and an ultrasonic image (for example, an ultrasonic tomographic image) is reconstructed and displayed based on the received signal.
- the region of interest set in advance in the subject is converted into an ultrasonic tomographic image. Redrawing is performed.
- volume data three-dimensional image data regarding the subject is acquired.
- the treatment site of the subject is set as the area of interest in the volume data.
- the scan surface of the ultrasonic probe is adjusted to the position of the region of interest.
- a reference image having the same cross section as the ultrasonic tomographic image that is, an image of the region of interest before treatment is composed of volume data.
- An object of the present invention is to provide a more suitable super image by redrawing a region of interest of a subject on an ultrasonic image. To realize a sonic device.
- an ultrasonic apparatus includes an ultrasonic probe that transmits and receives ultrasonic waves to and from a subject, and a driving signal for transmission to the ultrasonic probe.
- Transmitting means for supplying a signal
- receiving means for processing a reception signal output from the ultrasonic probe
- an image constructing unit for forming an ultrasonic image based on a signal output from the receiving means
- the ultrasonic signal Display means for displaying a sound wave image, and based on the position data of the ultrasonic probe and the position data of the region of interest set in the volume data acquired in advance, the scan surface of the ultrasonic probe Guide information generating means for generating guide information for guiding the user to the position of the region of interest and displaying the guide information on the display means.
- the guide information is displayed as an objective index for guiding the position and inclination of the ultrasonic probe being imaged to the target state.
- the target state is the position and inclination of the ultrasonic probe when included in the S-scan plane of the position force of the region of interest set in advance on the subject.
- the ultrasonic imaging program of the present invention includes a procedure for supplying a driving signal for transmission to an ultrasonic probe that transmits and receives ultrasonic waves to and from a subject, and from the ultrasonic probe.
- the guide information for guiding the scan surface of the ultrasonic probe to the position of the region of interest is generated.
- the control computer is caused to execute a procedure for displaying on the display means.
- the ultrasonic imaging method of the present invention includes a step of supplying a driving signal for transmission to an ultrasonic probe that transmits and receives ultrasonic waves to and from a subject, and an output from the ultrasonic probe.
- a step of processing the received signal, a step of forming an ultrasonic image based on the signal after the reception processing, and a step of displaying the ultrasonic image, and position data of the ultrasonic probe, Take in advance Based on the position data of the region of interest set in the obtained volume data, and generating guide information for guiding the scan surface of the ultrasonic probe to the position of the region of interest and displaying it on the display means It is characterized by that.
- FIG. 1 is a block diagram showing a configuration of an ultrasonic apparatus according to an embodiment to which the present invention is applied.
- FIG. 2 is a flowchart showing a preparation process of the ultrasonic apparatus of FIG.
- FIG. 3 is a flowchart showing an imaging process of the ultrasonic apparatus of FIG.
- FIG. 4 is a diagram showing a display example of a screen for setting a region of interest.
- FIG. 5 is a diagram showing a display example of guide information.
- FIG. 6 is a diagram showing an example in which guide information for guiding the scanning surface of the probe to the position of the region of interest is displayed.
- FIG. 7 is a diagram showing a form in which a model image is displayed.
- FIG. 8 is a diagram showing a display example of other guide information.
- FIG. 9 is a diagram showing another display example of a screen for setting a region of interest.
- FIG. 10 is a diagram showing a display example of a target section setting screen.
- FIG. 11 is a diagram showing an example in which the setting screens of FIGS. 9 and 10 are displayed side by side on the display screen of FIG. 5.
- FIG. 1 is a block diagram showing the configuration of the ultrasonic apparatus of the present embodiment.
- the ultrasonic apparatus transmits an ultrasonic probe 10 (hereinafter referred to as a probe 10) that transmits and receives ultrasonic waves to and from the subject H, and a probe 10.
- a transmission / reception unit 12 that processes a reception signal output from the probe 10 while supplying a driving signal for waves, and an ultrasonic image (for example, an ultrasonic tomogram) based on the reception signal output from the transmission / reception unit 12 ),
- an image display unit 16 as display means for displaying an ultrasonic tomographic image formed by the ultrasonic image configuration unit 14 on the screen.
- the ultrasonic apparatus includes a guide information calculation unit 20 as a means for generating guide information indicating a target movement direction, a target movement amount, a target inclination angle, and the like of the probe 10. ing. Based on the position data of the probe 10 and the position data of the region of interest set in the volume data related to the subject H acquired in advance, the guide information calculation unit 20 displays the scanning surface of the probe 10 on the subject H's interest. Guide information to be guided to the position of the area is generated and displayed on the image display unit 16.
- the ultrasonic apparatus will be described in more detail.
- the probe 10 has a plurality of diagnostic transducers arranged.
- the transducer converts the electrical transmission drive signal supplied from the transmission / reception unit 12 into an ultrasonic wave and emits it toward the subject H.
- the transducer receives the reflected echo generated from the subject H and converts it into an electrical reception signal.
- a plurality of therapeutic vibrations may be arranged in addition to the diagnostic vibrator. In that case, the frequency of the ultrasonic wave transmitted from the therapeutic transducer is set to be smaller than that of the diagnostic transducer.
- the received signal output from the probe 10 is processed by the transmission / reception unit 12.
- the transmission / reception unit 12 has transmission means for supplying a driving signal for transmission to the probe 10 and reception means for processing a reception signal output from the probe 10.
- the receiving means performs amplification processing and phasing processing on the reception signal output from the probe 10 and then outputs it to the ultrasonic image construction unit 14.
- the ultrasonic image constructing unit 14 performs processing such as detection on the reception signal output from the transmitting / receiving unit 12 to construct an ultrasonic tomographic image.
- the ultrasonic tomogram here is a two-dimensional image corresponding to the scan plane of the probe 10. Then, the ultrasonic image constructing unit 14 outputs the ultrasonic tomographic image to the image memory control unit 24.
- the image memory control unit 24 associates a frame number with each ultrasonic tomographic image output from the ultrasonic image construction unit 14 and stores it in the storage area.
- the frame number is an image management number corresponding to the ultrasonic tomographic image.
- a magnetic position sensor 22 that acquires the position and inclination of the probe 10 is provided.
- the magnetic position sensor 22 is based on a magnetic sensor as a magnetic signal detection means affixed to the probe 10, a source as a magnetic field generator attached to a bed or the like, and a detection signal output from the magnetic sensor.
- Calculation means for calculating the position, inclination, etc. of the probe 10 (hereinafter referred to as the position data of the probe 10 as appropriate) is provided.
- the magnetic position sensor 22 outputs the position data of the probe 10 to the position information calculation holding unit 26.
- Use magnetic signals Instead of the above-described form, a form using an optical signal may be applied. In short, if you can get the position data of the probe 10.
- the position information calculation holding unit 26 associates the position data of the probe 10 with the frame number of the ultrasonic tomographic image. For example, the position data of the probe 10 output from the magnetic position sensor 22 is associated with the frame number notified from the image memory control unit 24. Then, the position information calculation holding unit 26 outputs the position data of the probe 10 to the position information acquisition unit 28 in accordance with the control command.
- the position information acquisition unit 28 takes in the position data of the probe 10 output from the position information calculation holding unit 26. For example, the position information acquisition unit 28 acquires the position data of the probe 10 being imaged from the position information calculation holding unit 26 during real-time imaging. Further, the position information acquisition unit 28 acquires position data of the probe 10 associated with the ultrasonic tomogram read from the image memory control unit 24 from the position information calculation holding unit 26 at the time of so-called freeze imaging. . Then, the position information acquisition unit 28 outputs the position data to the guide information calculation unit 20 and the reference image construction unit 30.
- volume data acquisition processing unit 18 that captures three-dimensional image data (hereinafter referred to as volume data) relating to the subject H is provided.
- the volume data here is acquired by an imaging apparatus such as an ultrasonic imaging apparatus, an X-ray CT imaging apparatus, or a magnetic resonance imaging apparatus, for example, before treatment.
- the volume data acquisition processing unit 18 stores the volume data acquired from the image capturing device in the storage area. Then, the volume data processing unit 18 reads the volume data from the storage area and outputs it to the reference image constructing unit 30 and the region of interest designating unit 34 in response to a command input via the operation panel 32.
- the reference image construction unit 30 reconstructs a reference image using the volume data output from the volume data acquisition processing unit 18 based on the position data of the probe 10 notified from the position information acquisition unit 28. To do. For example, during real-time imaging, the reference image construction unit 30 reconstructs a tomographic image having the same cross section as the scan plane of the probe 10 being imaged as a reference image. In addition, the reference image constructing unit 30 performs a tomographic image having the same cross section as the ultrasonic tomographic image read from the image memory control unit 24 during so-called freeze imaging. The image is reconstructed as a reference image.
- the region-of-interest specifying unit 34 sets a region of interest for the volume data output from the volume data acquisition processing unit 18.
- the region of interest here is a point or range corresponding to a site to be diagnosed or treated (for example, a liver tumor).
- the region-of-interest designating unit 34 sequentially displays a plurality of tomographic images having different cross-sectional directions configured from volume data. Then, the region-of-interest designating unit 34 designates the region of interest on the tomographic image and outputs to the guide information calculation unit 20 the botacell coordinates of the designated region (hereinafter referred to as position data of the region of interest as appropriate).
- position data of the region of interest is designated via the operation panel 32.
- the guide information calculation unit 20 acquires the position data of the region of interest from the region-of-interest specifying unit 34, and the position data of the probe 10 from the position information acquisition unit 28 for a set time interval (for example, real time ) Then, the guide information calculation unit 20 calculates the relative position of the probe 10 with respect to the region of interest, and generates an image whose display form changes following the change in the size of the relative position as guide information.
- the guide information here is an objective index for guiding the position and inclination of the probe 10 being imaged to the target state.
- the guide information is a guide image or character image that indicates the target movement direction, target movement amount, target inclination angle, rotation direction, etc. of the probe 10, and is updated as needed according to the position and inclination of the probe 10. Is done.
- the target state refers to the position and inclination of the probe 10 when the position of the region of interest is included in the scan plane of the probe 10.
- the guide information calculation unit 20 outputs a command to the sound generation unit 35 as a sound generation means to change the sound generation interval following the change in the relative position of the probe 10 with respect to the region of interest. You can also For example, the guide information calculation unit 20 can output a command to shorten the sound generation interval as the relative position of the probe 10 with respect to the region of interest decreases. Further, the guide information calculation unit 20 can output a command for generating a notification sound when the magnitude of the relative position becomes zero, that is, when the probe 10 enters the target state.
- the sound generation unit 35 includes a buzzer, a speaker, and the like that generate sound intermittently.
- the display control unit 36 includes an ultrasonic tomogram read from the image memory control unit 24, a reference image output from the reference image configuration unit 30, and guide information output from the guide information calculation unit 20. Are displayed on the image display section 16.
- the ultrasonic tomogram here is the probe It is an ultrasonic image corresponding to the scanning surface of the child 10.
- the reference image is a tomographic image having the same cross section as the ultrasonic tomographic image being displayed.
- the guide information is, for example, an arrow image that guides the probe 10 to the position of the region of interest set in the reference image in order to set the scan plane of the probe 10 to the same cross section as the tomographic image of the reference image.
- the display control unit 36 performs control in accordance with a command input from the operation panel 32.
- the display control unit 36 controls to read out the ultrasonic tomogram from the image memory control unit 24 at the time of freeze imaging in accordance with the command input from the operation panel 32, or to display the reference image along with the ultrasonic tomogram.
- control for displaying guide information and control for selecting and displaying guide information are performed.
- the operation panel 32 has input means such as a keyboard, a mouse, and a pointing device.
- the probe 10 is brought into contact with, for example, the body surface of the subject H. Thereafter, when a driving signal is supplied from the transmission / reception unit 12 to the probe 10, ultrasonic waves are emitted from the probe 10 toward the subject H. The reflected echo generated in the process of the ultrasonic wave propagating through the subject H is received by the probe 10 and converted into a received signal. The received signal output from the probe 10 is subjected to processing such as amplification by the transmission / reception unit 12. An ultrasonic tomographic image is reconstructed by the ultrasonic image construction unit 14 based on the received signal after processing. The reconstructed ultrasonic tomographic image is stored in the image memory control unit 24. The stored ultrasonic tomographic image is read by the display control unit 36 and then displayed on the screen of the image display unit 16.
- the ultrasonic tomographic image is picked up, it is reconstructed from the volume data by the reference image force S reference image construction unit 30 having the same cross section as the ultrasonic tomographic image.
- the volume data here is taken from, for example, an X-ray CT apparatus by the volume data acquisition processing unit 18, and relates to the subject H before treatment.
- the reference image is read by the display control unit 36 and then displayed on the image display unit 16 side by side on the same screen as the ultrasonic tomographic image.
- FIG. 2 is a flowchart showing the preparation process of this embodiment.
- a plurality of volume data relating to the subject is constructed in advance by an image capturing apparatus such as an X-ray CT apparatus.
- the volume data related to the subject H before treatment is designated on the operation panel 32 as processing target data.
- a graphical user interface GUI
- the GUI here is an input field for specifying the storage destination of volume data (for example, an imaging device or a database server) and an input field for specifying the name of the volume data (for example, the subject H before treatment). This is the menu screen where is displayed.
- the volume data acquisition processing unit 18 acquires volume data related to the subject H before treatment from the storage destination.
- Step of setting coordinate reference point of volume data S101>
- the volume data acquisition processing unit 18 sets a reference coordinate origin for the volume data related to the subject H before treatment. For example, the volume data acquisition processing unit 18 constructs a plurality of tomographic images from the volume data, and causes the image display unit 16 to display the tomographic images in order via the display control unit 36. Next, a characteristic part (for example, a xiphoid process) on the tomographic image being displayed is designated by the operation panel 32 as a reference point. Then, the volume data acquisition processing unit 18 assigns three-dimensional orthogonal coordinates with the reference point as the origin as a volume data coordinate.
- a characteristic part for example, a xiphoid process
- the volume data acquisition processing unit 18 captures information related to the probe 10 (for example, the range of the sector type probe and the range of the convex type probe), and based on the acquired information. It is also possible to limit the range in which the reference point can be specified on the tomographic image. If a reference point is already set in the volume data, this step may be omitted.
- the region-of-interest designating unit 34 sets a region to be diagnosed or treated (for example, a liver tumor) as a region of interest (RI) for the volume data related to the subject H before treatment.
- the region-of-interest specifying unit 34 constructs a plurality of tomographic images from the volume data, and causes the image display unit 16 to display the tomographic images in order via the display control unit 36.
- the region of the liver tumor on the displayed tomographic image is designated as a region of interest by the operation panel 32.
- the region-of-interest specifying unit 34 outputs the position data of the region of interest in the coordinate system set in the step S101 to the guide information calculating unit 20.
- the region of interest here may be one or more points, or a range having a certain width. Also, this step can be omitted if the volume data is already set.
- the position coordinates of the probe 10 are associated with the coordinates of the volume data set in step S101. More specifically, when ultrasonic imaging is performed by bringing the probe 10 into contact with the body surface of the subject H, the image display unit 16 displays an ultrasonic tomographic image. Next, when a feature part (for example, a sword-like projection) on the displayed ultrasonic tomographic image is designated as a reference point by the operation panel 32, the magnetic position sensor 22 will perform three-dimensional orthogonal coordinates with the reference point as the origin. Is assigned as the position coordinate of probe 10. In short, the scan plane coordinates of the probe 10 are associated with the coordinates of the volume data by matching the origin of the coordinates of the probe 10 and the origin of the coordinates of the volume data.
- the position of the probe 10 when the xiphoid process is drawn on the ultrasonic tomographic image may be taken as a reference point. In that case, it is desirable to use the position when the xiphoid process is drawn on the ultrasonic tomographic image with the maximum size as a reference point.
- the timing for fetching the reference point of the probe 10 is determined by an input command to the operation panel 32.
- the force described by dividing the preparation process of this embodiment into the processes of S101 to S103 is not limited to this form.
- any method that can associate the volume data coordinates acquired by the volume data acquisition processing unit 18 with the scan plane coordinates of the probe 10 may be used.
- FIG. 3 is a flowchart showing the imaging process of the present embodiment.
- the imaging step shown in FIG. 3 redraws the region of interest set before the treatment on the subject H, for example, during or after the treatment, on the ultrasound image. Therefore, by observing the ultrasound image displayed in this imaging process, for example, the therapeutic effect of subject H can be confirmed, and minimally invasive treatment (IVR: interventional radiology) that treats the region of interest with therapeutic ultrasound is performed. It can be done accurately.
- IVR interventional radiology
- the magnetic position sensor 22 acquires position data of the probe 10 at set time intervals.
- the set time interval here can be changed as needed. It is desirable to acquire position data in real time. Then, the magnetic position sensor 22 passes the position data of the probe 10 to the position information acquisition unit 28 via the position information calculation holding unit 26.
- Step of generating guide information S 201>
- the guide information calculation unit 20 Based on the position data of the probe 10 acquired from the position information acquisition unit 28 and the position data of the region of interest acquired from the region-of-interest specifying unit 34, the guide information calculation unit 20 captures the probe 10 being imaged. Guide information for guiding the position and inclination of the to the target state is calculated.
- the target position data here is data of the position and inclination of the ultrasonic probe when the region of interest is included in the scan plane of the probe 10 being imaged. More specifically, the guide information calculation unit 20 calculates the relative position of the probe 10 with respect to the region of interest at a set time interval (for example, real time). Next, the guide information calculation unit 20 generates guide information based on the calculated relative position.
- the guide information is a guide image or character image indicating the target movement direction, target movement amount, target inclination angle, target rotation direction of the probe 10, but is not limited thereto.
- the guide information should be an objective indicator that shows how much and in what direction the position of the probe 10 being imaged can be redrawn in the ultrasonic tomogram. Les.
- the guide information calculation unit 20 calculates the relative position of the probe 10 with respect to the region of interest, but substantially the same even if the relative position of the scan plane of the probe 10 with respect to the region of interest is calculated. It is the same. Therefore, in the present embodiment, the relative position of the probe 10 with respect to the region of interest includes the relative position of the scan plane of the probe 10 with respect to the region of interest. In addition, for cases where it is difficult to redraw the region of interest on an ultrasonic tomographic image, such as with a bone or organ, the guide information calculation unit 20 uses the relative positional relationship between the bone and the region of interest and the scan plane of the probe 10. Can generate 3D guide information.
- the display control unit 36 includes the ultrasonic tomogram read from the image memory control unit 24, the reference image read from the reference image configuration unit 30, and the guide information read from the guide information calculation unit 20. Are displayed on the screen of the image display unit 16 at the same time.
- the ultrasonic tomographic image here is one in which the drawing changes as the position and tilt of the probe 10 change. For example, it can be referred to as a post-treatment image.
- the reference image displayed in the same cross section as the ultrasonic tomographic image is updated following the change of the ultrasonic tomographic image, and can be referred to as a pre-treatment image, for example.
- the ultrasonic tomographic image and the reference tomographic image are compared and observed, for example, before treatment of the subject H can be compared with after treatment (or during treatment), and low-invasive treatment can be accurately performed.
- the guide information is updated as needed as the position and tilt of the probe 10 change. By adjusting the position and tilt of the probe 10 while referring to this guide information, it can be monitored that the scan plane of the probe 10 approaches or moves away from the region of interest.
- guide information is displayed on the image display unit 16 as an objective index for guiding the position and inclination of the probe 10 being imaged to the target state. .
- the target movement direction, target movement amount, target inclination angle, etc. of the probe 10 can be quantitatively grasped.
- the region of interest can be accurately and easily redrawn on the ultrasound image regardless of the operator. That is, it is easy and accurate to redraw the region of interest on the ultrasonic tomographic image being imaged, and the usability for the operator is improved.
- FIG. 4 is a display example of a screen for setting a region of interest in volume data.
- This setting screen is displayed in step S102 of FIG.
- the setting screen shown in Fig. 4 displays multiple tomographic images with different cross-sectional directions. These tomographic images are composed of volume data related to the subject H. More specifically, the setting screen shown in FIG. 4 includes a tomographic image display area 52 in which the short-axis cross section of the subject H is drawn, and a tomographic image display area in which the long-axis cross section of the subject H is drawn. 54 and a display area 55 of a slice image in which a circular section of the subject H is drawn.
- the setting screen includes a display area 56 of a 3D stereoscopic image configured by, for example, rendering processing from volume data related to the subject H, a slice plane image 58 that determines a cross section of the 3D stereoscopic image, and a 3D It has a display area 60 for a composite image with a stereoscopic image.
- the setting screen also has a tomographic image display area 59 for setting a region of interest selected from the tomographic images displayed in the plurality of display areas 52, 52, and 54.
- the setting screen is a GUI menu for setting a region of interest via the operation panel 32.
- the GUI menu 64 includes a button for moving a designated point of the region of interest, an input field for designating the region of interest using three-dimensional orthogonal coordinates having an X axis, a Y axis, and a Z axis, and a region of interest determination button.
- the treatment site is set as volume of interest in the volume data.
- a 3D stereoscopic image and a slice plane image 58 are displayed in the display area 60.
- a plurality of cross sections of the three-dimensional stereoscopic image are determined.
- the slice images corresponding to each cross section are displayed in the display areas 52, 54, and 55.
- the desired tomographic image is selected from the plurality of tomographic images, the selected image is displayed in the display area 59.
- the position of the region of interest is input to the GUI menu 64 while referring to the tomographic image in the display area 59, a mark corresponding to the region of interest is displayed on the tomographic image.
- the X-axis coordinate, Y-axis coordinate, or Z-axis coordinate may be input via the GUI menu 64, or the movement of the mouse or the like may be followed.
- the region of interest determination button is clicked, the position of the region of interest is determined.
- FIG. 5 is a display example when the region of interest of the subject H is redrawn on the ultrasonic image.
- the ultrasonic image shown in FIG. 5 is displayed in step S103 of FIG.
- the display screen displays an ultrasonic tomographic image display area 68 corresponding to the scan surface of the probe 10 being imaged, and a reference image having the same cross section as the ultrasonic image in the display area 68. It has area 66.
- the display screen also displays a guide information display area 70 that guides the scan plane of the probe 10 to the position of the region of interest, and a display where the position mark of the probe 10 is superimposed on the body mark related to the subject H. It has area 71.
- an ultrasonic tomographic image corresponding to the scan plane of the probe 10 is displayed in the display area 68.
- a reference image having the same cross section as the ultrasonic tomographic image of the display area 68 is simultaneously displayed in the display area 66.
- the ultrasonic tomogram in the display area 68 is a drawing of the current tissue of the region of interest of the subject H, and is updated in real time according to changes in the position and tilt of the probe 10.
- the reference image in the display area 66 is a drawing of a past tissue in the region of interest of the subject H, and is updated following the change in the ultrasonic tomographic image in the display area 68.
- the current region of interest is drawn on the ultrasonic tomogram in the display area 68, and the reference for the display area 66 is displayed.
- a past region of interest is drawn on the image.
- the region of interest here is set in step S102 in FIG.
- the ultrasonic tomographic image in the display area 68 is compared with the reference image in the display area 66, for example, the therapeutic effect of the region of interest and the cure of the disease can be confirmed.
- the display area 66 and the display area 68 are arranged side by side, and a body mark is superimposed on a part of the display area 66, and guide information is displayed on a part of the display area 68.
- Overlapping display is not limited to this mode, and the display position can be changed within a range that does not hinder diagnosis or treatment in accordance with a command input to the operation panel 32.
- FIG. 6 is a diagram illustrating an example in which guide information for guiding the scan plane of the probe 10 to the position of the region of interest is displayed based on the relative position of the probe 10 with respect to the region of interest.
- guide information As shown in Fig. 6 (A), numerical values and figures are displayed as guide information.
- the target distance 80 in the vertical direction (X-axis direction) of the probe 10 the target distance 82 in the horizontal direction (Y-axis direction), and the target distance 84 in the depth direction (Z-axis direction).
- a target angle 86 indicating the inclination of the probe is displayed.
- the X-axis direction here corresponds to the longitudinal direction of the subject H
- the Y-axis direction corresponds to the short direction of the subject H that is orthogonal to the X-axis direction
- the Z-axis direction is orthogonal to the X-axis and Y-axis Corresponds to the depth direction of subject H.
- an image obtained by combining the scan plane image 74 and the three-dimensional stereoscopic image 76 in the same coordinate system is displayed as the guide information of the figure.
- the three-dimensional solid image 76 is a rendering image in which the surface is drawn based on the volume data related to the subject H.
- the scan plane image 74 is a plate-like image corresponding to the scan plane of the probe 10 and is displayed by being inserted into the three-dimensional stereoscopic image 76.
- an image on the near side in the line-of-sight direction is displayed. Therefore, it is possible to easily grasp the positional relationship between the three-dimensional stereoscopic image 76 and the scan plane image 74 in the viewing direction, that is, in the depth direction.
- the relative position of the probe 10 with respect to the three-dimensional stereoscopic image 76 may be displayed.
- the target distance 80 is 12.5 mm
- the target distance 82 is 5.8 mm
- the target distance 84 is 18.5 mm
- the target angle 86 is 60 °.
- the probe 10 is moved by 12.5 mm in the X-axis direction. Move the probe 10 in the Y-axis direction by 5.8mm while visually recognizing the target distance 82.
- the probe 10 is inclined by 60 ° with respect to the Z axis. That is, the position and inclination of the probe 10 are adjusted so that the target distances 80 and 82 and the target angle 86 become zero.
- An ultrasonic tomographic image and a reference image in which the region of interest 72 is drawn can be acquired by stroking an ultrasonic beam at a depth of 18.5 mm in the Z-axis direction.
- guide information may be blinked.
- the scan plane image 74 moves (for example, tilts) following the change of the probe 10.
- the relative position of the scan plane and the region of interest can be visually grasped.
- sound can be applied as the guide information instead of or together with it.
- a notification sound is generated from the sound generator 35.
- the sound generator 35 shortens the sound generation interval as the scan surface of the probe 10 approaches the region of interest, and conversely, the scan surface of the probe 10 is the region of interest.
- the sound generation interval can be increased as the distance from the sound source increases. This makes it easy to grasp the positional deviation of the scan plane with respect to the region of interest simply by listening to the sound generation interval, improving usability for the operator.
- FIG. 7 is a diagram showing a form in which a model image 88 as guide information is displayed in addition to the display form of FIG.
- the model image 88 is an image that schematically represents the three-dimensional stereoscopic image 76, and is composed of volume data relating to the subject H. More specific Specifically, the model image 88 is a grid-like transmission image in which a solid line is drawn in units of volume data. That is, the model image 88 is different from the three-dimensional stereoscopic image 76 in which only the surface of the subject H is displayed in that the depth direction of the subject H is displayed through.
- the model image 88 here is displayed by combining the scan plane image 74 and the region of interest 72 in the same coordinate system. Therefore, the relative positions of the subject H and the scanning surface of the probe 10 and the region of interest can be more easily grasped.
- the probe 10 is moved by 12.5 mm in the X-axis direction. Move the probe 10 by 5.8mm in the Y-axis direction while viewing the target distance 82. Further, while visually recognizing the target angle 86, the probe 10 is inclined by 60 ° with respect to the Z axis. Then, the region of interest 72 is drawn on the ultrasonic tomographic image by scanning the ultrasonic beam at a depth of 18.5 mm in the Z-axis direction. In the process of adjusting the position and tilt of the probe 10 in this way, in the example shown in FIG. 7, the relative positional relationship between the scan plane of the probe 10 and the interest area 72 is visually displayed on the model image 88. Be grasped. This makes it easier to adjust the position and inclination of the probe 10.
- FIG. 8 is a diagram showing a display example of other guide information based on the relative position of the probe 10 with respect to the region of interest.
- rotation arrows 92a and 92b are displayed.
- the rotation arrows 92a and 92b indicate the rotation direction of the probe 10 with respect to the region of interest 72, for example, the rotation direction around the Z axis or the reverse rotation direction.
- An arrow 93 indicating the target movement direction in the X-axis direction of the probe 10 and an arrow 94 indicating the target movement direction in the Y-axis direction are displayed.
- the arrows 93 and 94 change in width and color according to the distance of the probe 10 to the region of interest 72.
- the widths of the arrows 93 and 94 are reduced, or the arrows 93 and 94 are displayed in blue.
- the width of the arrows 93 and 94 is increased, or the arrows 93 and 94 are displayed in red.
- a three-dimensional arrow indicating the target position of the probe 10 in a three-dimensional manner may be displayed.
- the three-dimensional arrow is a vector image constructed based on the target distances 80, 82, 84 and the target angle 86 of the probe 10.
- the three-dimensional arrow changes in width and color according to the three-dimensional distance of the probe 10 with respect to the region of interest 72.
- the three-dimensional distance here is the target distance 80, 82, 84 Based on the three-square theorem.
- FIG. 9 is a diagram showing another display example of a screen for setting a region of interest in volume data.
- FIG. 9 is a setting screen when the region of interest has a predetermined range, and is different from the setting screen of FIG. 4 when the region of interest is a point. Therefore, the explanation will focus on the differences from the setting screen in Fig. 4.
- the setting screen has display areas 59, 52, and 54 for tomographic images with different cross sections of the subject H.
- the caliper mark is displayed superimposed on the tomographic image.
- the carrier mark is aligned with the position of the region of interest 100 via the operation panel 32.
- the tissue range including the position of the carrier mark is set as the region of interest 100 as shown in FIG.
- a pixel region in which the luminance information and tissue elasticity information are included in the setting range is automatically set as the region of interest 100.
- an image area displayed with the same brightness as the position of the carrier mark is set as the region of interest 100. It is preferable to make it possible to recognize that the region of interest 100 has been set, for example, by displaying the region of interest 100 in a predetermined color.
- a target cross section 102 including the region of interest 100 is designated as shown in FIG. 9 (D).
- the target cross-section is a cross-section in which the scanning surface of the probe 10 being imaged is guided when ultrasonic imaging is performed after treatment of the subject H.
- a cross section in which the region of interest 100 is drawn to the maximum is specified.
- a cross section necessary for diagnosis or treatment can be designated as appropriate, and a new target cross section 102a can be set by moving or rotating the target cross section 102, for example, as shown in FIG.
- FIG. 10 is a diagram showing a display example of the target section setting screen.
- FIG. 10A is a diagram showing the region of interest 100 extracted from the display area 54 in FIG. 9D for convenience of explanation.
- the target section 102 is designated as the region of interest 100
- a tomographic image 104 corresponding to the target section 102 is displayed.
- the region of interest 100 here is drawn relatively small on the tomographic image 104 as shown in FIG.
- the target cross section 102 is changed and a new target cross section 102a is specified again, the target cross section 102a will be handled.
- the tomographic image 104a is displayed. As shown in FIG.
- the region of interest 100 is drawn relatively large in the tomographic image 104a.
- the target cross section 102a is selected instead of the target cross section 102. That is, the target cross section 102a is set as a cross section in which the scan plane of the probe 10 being imaged is guided when ultrasonic imaging is performed after treatment of the subject H.
- FIG. 11 is a diagram showing an example in which the setting screens of FIGS. 9 and 10 are displayed side by side on the display screen of FIG.
- the display screen displays an ultrasonic tomographic image display area 68 corresponding to the scan surface of the probe 10 being imaged, and a reference image having the same cross section as the ultrasonic image in the display area 68. It has area 66.
- a setting screen is arranged alongside this display screen.
- the setting screen has display areas 59, 52, and 54 for tomographic images with different cross sections of the subject H, and a display area for tomographic images 104a corresponding to the target cross section 102a.
- the target cross section 102a on which the region of interest 100 is appropriately drawn can be interactively set. Usability is improved for the user. For example, region of interest 100
- the present invention has been described with the embodiment, it is not limited thereto.
- a region of interest with motion for example, a circulatory organ such as a heart or a blood vessel
- the motion data for example, it is desirable to associate cardiac time phase data and pulse wave data.
- the ultrasonic apparatus applies a so-called RVS (Real-time Virtual Sonography) technique.
- RVS Real-time Virtual Sonography
- the RVS technology is to display an ultrasonic image being imaged and extract and display a reference image having the same cross section as the ultrasonic image from the volume data.
- the present probe is not limited to the ultrasonic device to which the RVS technology is applied.
- the region of interest is preset in the volume data related to the subject H, the current probe is used.
- the present invention can be applied when ten scan planes should be guided to the position of the region of interest.
- the control functions necessary for ultrasonic imaging according to the present embodiment have been described in block units.
- the control functions are aggregated as an ultrasonic imaging program, and the ultrasonic imaging is performed.
- the program can be executed by a control computer.
- the ultrasound imaging program processes the procedure for supplying a driving signal for transmission to the probe 10 that transmits and receives ultrasound to and from the subject H, and the received signal output from the probe 10.
- the control computer is caused to execute a procedure for performing, a procedure for constructing an ultrasonic image based on the signal after reception processing, and a procedure for displaying the ultrasonic image.
- This ultrasound imaging program scans the scanning surface of the probe 10 based on the position data of the probe 10 and the position data of the region of interest set in the volume data related to the subject H acquired in advance.
- the control computer executes a procedure for generating guide information to be guided to the position of the region of interest and displaying it on the image display unit 16.
- the ultrasonic apparatus according to the embodiment to which the present invention is applied has been described.
- the ultrasonic apparatus to which the present invention is applied is not limited to the spirit or main characteristic power thereof. It can be implemented in the form.
- the above-described embodiments are merely examples in all respects, and are not construed as limiting. That is, the scope of the present invention includes modifications and changes belonging to the equivalent range.
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Abstract
Description
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JP2006547993A JP4470187B2 (ja) | 2004-12-03 | 2005-12-01 | 超音波装置、超音波撮像プログラム及び超音波撮像方法 |
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