WO2019124171A1 - Dispositif d'observation à ondes ultrasonores, procédé de fonctionnement d'un dispositif d'observation à ondes ultrasonores et programme pour le fonctionnement d'un dispositif à ondes ultrasonores - Google Patents

Dispositif d'observation à ondes ultrasonores, procédé de fonctionnement d'un dispositif d'observation à ondes ultrasonores et programme pour le fonctionnement d'un dispositif à ondes ultrasonores Download PDF

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Publication number
WO2019124171A1
WO2019124171A1 PCT/JP2018/045566 JP2018045566W WO2019124171A1 WO 2019124171 A1 WO2019124171 A1 WO 2019124171A1 JP 2018045566 W JP2018045566 W JP 2018045566W WO 2019124171 A1 WO2019124171 A1 WO 2019124171A1
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WO
WIPO (PCT)
Prior art keywords
ultrasonic
observation apparatus
ultrasound
probe
ultrasonic transducer
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PCT/JP2018/045566
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English (en)
Japanese (ja)
Inventor
繁範 香西
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オリンパス株式会社
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Publication date
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Publication of WO2019124171A1 publication Critical patent/WO2019124171A1/fr

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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
    • A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters

Definitions

  • the present invention relates to an ultrasound observation apparatus, an operation method of the ultrasound observation apparatus, and an operation program of the ultrasound observation apparatus.
  • an ultrasound diagnostic system that performs diagnosis using an ultrasound probe, it is required to notify the user of the state of the ultrasound transducer provided in the ultrasound probe each time the ultrasound probe is connected to the ultrasound observation apparatus. It is getting worse.
  • Patent Document 1 as a technique for self-diagnosis of a mechanical scanning type ultrasonic endoscope, a technique including test signal generating means for inputting a test signal to a signal line connected to an ultrasonic transducer. Is disclosed. In this technology, the failure location and the type of failure are determined based on the luminance information obtained using the test signal, and the determination result is displayed.
  • the present invention has been made in view of the above, and an ultrasonic observation apparatus capable of determining the state of an ultrasonic transducer using a simple configuration when an ultrasonic probe is connected, ultrasonic observation
  • An object of the present invention is to provide an operating method of the device and an operating program of the ultrasonic observation device.
  • the ultrasonic observation apparatus can connect a mechanical scanning ultrasonic probe provided with an ultrasonic transducer that generates an ultrasonic wave.
  • An ultrasonic observation apparatus for transmitting ultrasonic signals to the ultrasonic probe while generating ultrasonic image data in response to an echo signal received by the ultrasonic probe;
  • a control unit that is a member that covers a probe and that determines the state of the ultrasonic transducer based on an echo signal from a member that is separated from the ultrasonic transducer, and control that reports information about the determination result of the determination unit And a control unit.
  • the determination unit uses only an echo signal received first after starting transmission of the transmission signal, or starts transmission of the transmission signal.
  • the state of the ultrasonic transducer is determined using a predetermined number of echo signals sequentially received from the above.
  • the ultrasonic observation apparatus is characterized in that, in the above-mentioned invention, the judgment unit judges the state of the ultrasonic transducer by comparing the amplitude of the echo signal with a threshold.
  • the determination unit generates data of a received image based on the echo signal, and compares the data of the received image with data of a reference image. It is characterized in that the state of the sound wave transducer is determined.
  • the ultrasound observation apparatus is characterized in that, in the above-mentioned invention, the reference image differs depending on the type of the ultrasound probe to be connected.
  • the ultrasonic observation apparatus is characterized in that, in the above-mentioned invention, the judgment unit carries out the judgment when the connection of the ultrasonic probe is detected.
  • the ultrasonic observation apparatus is characterized in that, in the above-mentioned invention, the member is a cap or a sheath covering the ultrasonic transducer.
  • a mechanical scanning ultrasonic probe provided with an ultrasonic transducer for generating ultrasonic waves can be connected, and ultrasonic waves are generated at the connected ultrasonic probes.
  • a method of operating an ultrasonic observation apparatus that generates ultrasonic image data in accordance with an echo signal received by the ultrasonic probe while transmitting a transmission signal to be transmitted, wherein a determination unit covers the ultrasonic probe
  • a determination step of determining the state of the ultrasonic transducer based on an echo signal from a member separated from the ultrasonic transducer, and a control step of performing control to notify information on the determination result of the determination step And is characterized.
  • the operation program of the ultrasonic observation apparatus can connect a mechanical scanning ultrasonic probe provided with an ultrasonic transducer for generating an ultrasonic wave, and generates an ultrasonic wave at the connected ultrasonic probe.
  • An operating program of an ultrasonic observation apparatus that transmits an ultrasonic transmission signal according to an echo signal received by the ultrasonic probe while transmitting a transmission signal to be transmitted, wherein the determination unit is a member that covers the ultrasonic probe
  • a determination step of determining the state of the ultrasonic transducer based on an echo signal from a member separated from the ultrasonic transducer, and a control step of performing control to notify information on the determination result of the determination step is characterized in that.
  • the state of the ultrasonic transducer can be checked using a simple configuration.
  • FIG. 1 is a block diagram showing a configuration of an ultrasound diagnostic system provided with the ultrasound observation apparatus according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart showing an outline of a state determination process performed by the ultrasound observation apparatus according to the first embodiment of the present invention.
  • FIG. 3 is a diagram showing an example of a reference image stored in the storage unit of the ultrasonic observation apparatus according to the second embodiment of the present invention.
  • FIG. 4 is a view showing an example of a received image generated by the determination unit of the ultrasonic observation apparatus according to the second embodiment of the present invention.
  • FIG. 1 is a block diagram showing a configuration of an ultrasound diagnostic system provided with the ultrasound observation apparatus according to Embodiment 1 of the present invention.
  • the ultrasound diagnostic system 1 shown in the figure transmits an ultrasound wave to a subject to be observed, and receives an ultrasound wave reflected by the subject.
  • generated are provided.
  • the ultrasound probe 2 is a mechanical radial scan type.
  • the ultrasound probe 2 has an elongated insertion portion 21 to be inserted into a subject or the like, and an operation portion 22 located at the proximal end of the insertion portion 21.
  • an ultrasonic transducer 23 is incorporated.
  • the ultrasonic transducer 23 is connected to a hard portion 24 a provided at the tip of the flexible shaft 24 passing through the insertion portion 21.
  • the hard portion 24 a is rotatably held by the bearing 25.
  • the distal end portion of the insertion portion 21 has a cap 26 which transmits ultrasonic waves.
  • the cap 26 is a member that covers the ultrasonic transducer 23 together with the hard portion 24 a and the bearing portion 25.
  • the periphery of the ultrasonic transducer 23 is filled with an ultrasonic wave propagation medium that propagates ultrasonic waves.
  • a plurality of signal lines connected to the ultrasonic transducer 23 pass through the inside of the flexible shaft 24 and are electrically connected to the ultrasonic observation apparatus 3.
  • the proximal end of the flexible shaft 24 is connected to the rotation drive unit 27 of the operation unit 22.
  • the rotation drive unit 27 has a motor for mechanically rotating the ultrasonic transducer 23, and rotates the ultrasonic transducer 23 by rotationally driving the flexible shaft 24 around its central axis.
  • the ultrasonic transducer 23 converts an electrical pulse signal received from the ultrasonic observation device 3 into an ultrasonic pulse (acoustic pulse) and irradiates the object with an object, and at the same time, converts the ultrasonic echo reflected by the object into a voltage. It is converted into an electrical echo signal (ultrasound signal) represented by a change and output.
  • the ultrasonic transducer 23 has a plurality of elements arranged in an array. The element is configured using a piezoelectric material such as lead zirconate titanate (PZT), lead titanate (PT), or lead niobate, and converts ultrasonic waves by converting mechanical energy and electrical energy. Send and receive.
  • PZT lead zirconate titanate
  • PT lead titanate
  • lead niobate lead niobate
  • the ultrasound probe 2 may be an ultrasound endoscope further having an imaging optical system and an imaging element, or may be a small diameter miniature probe not having an optical system. Further, the ultrasonic probe 2 may be of an extracorporeal type in which ultrasonic waves are irradiated from the body surface of the subject as well as the type inserted into the body of the subject.
  • the ultrasonic probe 2 may be a mechanical scanning type, and may be a convex type or a linear type.
  • the ultrasound observation apparatus 3 includes a transmission unit 31, a reception unit 32, a signal processing unit 33, an ultrasound image generation unit 34, a determination unit 35, a notification information generation unit 36, an input unit 37, and a control unit. And 38 and a storage unit 39.
  • the transmission unit 31 is electrically connected to the ultrasonic probe 2 and transmits a transmission signal (pulse signal) to the ultrasonic transducer 23.
  • the frequency band of the pulse signal transmitted by the transmission unit 31 may be a wide band that substantially covers the linear response frequency band of the electroacoustic conversion of the pulse signal in the ultrasonic transducer 23 to the ultrasonic pulse.
  • the transmission unit 31 transmits various control signals output from the control unit 38 to the ultrasound probe 2.
  • the transmission signal transmitted by the transmission unit 31 when the state determination of the ultrasonic transducer 23 is performed may have a higher power than the transmission signal at the time of inspection.
  • the receiving unit 32 receives an echo signal, which is an electrical reception signal, from the ultrasonic transducer 23 and performs A / D conversion to thereby convert digital radio frequency (RF) signal data (hereinafter referred to as RF data). Generate).
  • the receiving unit 32 also has a function of receiving various types of information including the identification ID from the ultrasound probe 2 and transmitting the information to the control unit 38.
  • the signal processing unit 33 generates digital ultrasound image reception data based on the RF data received from the receiving unit 32. Specifically, the signal processing unit 33 performs known processing such as digital beam forming (DBF) processing for adjusting and adding phases of a plurality of RF data, envelope detection processing, and logarithmic conversion processing, and Generate reception data for ultrasound image.
  • the ultrasonic image reception data is a plurality of line data (sound ray data) in which the amplitude or intensity of the reception signal indicating the intensity of reflection of the ultrasonic pulse is arranged along the transmission / reception direction (depth direction) of the ultrasonic pulse. It consists of
  • the signal processing unit 33 outputs the generated reception data for ultrasound image for one frame to the ultrasound image generation unit 34.
  • the ultrasound image generation unit 34 generates ultrasound image data based on the reception data for ultrasound image received from the signal processing unit 33.
  • the ultrasound image generation unit 34 has a digital scan converter (DSC) that converts the ultrasound image reception data into data according to the display method of the display device 4.
  • DSC digital scan converter
  • the ultrasound image generation unit 34 further performs signal processing using known techniques such as gain processing and contrast processing to generate ultrasound image data.
  • This ultrasound image data generates so-called B-mode image data.
  • the B-mode image is a grayscale image in which the values of R (red), G (green), and B (blue), which are variables when an RGB color system is adopted as a color space, are matched.
  • the determination unit 35 determines the state of the ultrasonic transducer 23 by analyzing the RF data received from the reception unit 32.
  • the determination unit 35 compares the amplitude of the RF data with a predetermined threshold value, determines that sensitivity degradation occurs when the amplitude is smaller than the threshold value, and writes the determination result in the storage unit 39 for storage.
  • the determination unit 35 may perform the state determination using only RF data corresponding to the echo signal received first after the transmission unit 31 starts transmission of the transmission signal, and the transmission unit 31 transmits the transmission signal.
  • the state determination may be performed using RF data respectively corresponding to a predetermined number of echo signals (at least a part of a multiple echo signal) sequentially received after the start of.
  • the determination unit 35 makes a determination using a predetermined number of echo signals, the determination is performed using different threshold values according to the reception time, and if all the echo signals fall below the threshold value, the sensitivity decrease occurs. It may be determined, or it may be determined that the sensitivity reduction occurs when the echo signal of a predetermined ratio is below the threshold.
  • the determination process of the determination unit 35 is performed in a state in which the distal end of the ultrasonic probe 2 is held in the air after the user connects the ultrasonic probe 2 to the ultrasonic observation apparatus 3.
  • an echo signal received by the receiver 32 with respect to the transmission signal transmitted by the transmitter 31 is an echo signal that is reflected by the cap 26 and returned.
  • the ultrasonic probe is a miniature probe, it may be an echo signal reflected back by the sheath covering the entire insertion portion instead of the cap.
  • the notification information generation unit 36 generates information (notification information) related to the determination result by the determination unit 35.
  • the notification information generation unit 36 generates character information to be displayed on the display device 4 as notification information.
  • the character information may include information such as the degree of sensitivity decrease ranked according to the value of the amplitude.
  • the notification information generation unit 36 may generate the determination result as visual information such as color, saturation, lightness, pattern or pattern as notification information, or information combining visual information and character information as notification information It may be generated.
  • reporting information generation part 36 may produce
  • the notification unit when the notification information generation unit 36 generates audio information is an audio output unit such as a speaker.
  • the input unit 37 is configured using a user interface such as a keyboard, a button, a mouse, a trackball, a touch panel, and a touch pad, and receives input of various operation signals.
  • a signal instructing start of the state determination process of the ultrasonic transducer 23 is included as one of various operation signals.
  • the control unit 38 reads the information stored in the storage unit 39 from the storage unit 39 and executes various arithmetic processing related to the operation method of the ultrasound observation apparatus 3 to perform ultrasound diagnosis including the ultrasound observation apparatus 3 Integrate and control the operation of the system 1.
  • the storage unit 39 stores information such as a threshold of amplitude to be referred to when the determination unit 35 makes a determination, and a result of the determination made by the determination unit 35.
  • the threshold value stored in the storage unit 39 may be different depending on the type of the ultrasound probe 2.
  • the storage unit 39 stores various programs for operating the ultrasound diagnostic system 1 and data including various parameters and the like necessary for the operation of the ultrasound diagnostic system 1.
  • the various programs include an operating program for executing the operating method of the ultrasound diagnostic system 1.
  • the various programs can be stored in a computer readable storage medium such as a hard disk, a flash memory, a CD-ROM, a DVD-ROM, a flexible disk and the like, and can be widely distributed. Also, various programs can be acquired by downloading via a communication network.
  • the communication network referred to here is realized by, for example, an existing public line network, LAN (Local Area Network), WAN (Wide Area Network) or the like, and may be wired or wireless.
  • the ultrasound observation apparatus 3 having the above configuration is a dedicated integration that executes a specific function such as a general processor such as a central processing unit (CPU) or an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).
  • the circuit is realized using a ROM (Read Only Memory) in which various programs and the like are previously installed, and a RAM (Random Access Memory) storing operation parameters and data of each process.
  • ROM Read Only Memory
  • RAM Random Access Memory
  • the display device 4 is an example of a notification unit, and receives and displays the ultrasonic image generated by the ultrasonic observation device 3 and the notification information generated by the notification information generation unit 36 via the video cable.
  • the display device 4 is configured using a monitor such as liquid crystal or organic EL (Electro Luminescence).
  • FIG. 2 is a flowchart showing an outline of the state determination process performed by the ultrasonic observation apparatus 3 having the above configuration. In the flowchart shown below, it is assumed that the ultrasonic observation apparatus 3 is powered on.
  • Step S101: Yes When the ultrasonic probe 2 is connected to the connector of the ultrasonic observation apparatus 3 and the receiving unit 32 receives a signal from the ultrasonic probe 2 and the control unit 38 detects connection of the ultrasonic probe 2 (step S101: Yes ), The control unit 38 causes the display device 4 to display a start message of the state determination process (step S102).
  • the start message is, for example, "Start the process of determining the state of the ultrasonic probe. Please hold the tip of the ultrasonic probe in the air, and press the OK button.”
  • Step S101: No the ultrasound observation apparatus 3 repeats Step S101.
  • the transmission unit 31 performs ultrasonic control of the ultrasonic transducer 23 and the transmission signal under the control of the control unit 38. It transmits to the probe 2 (step S104).
  • the determination unit 35 determines the state of the ultrasonic transducer 23 using the RF data received from the reception unit 32, and stores the determination result in the storage unit 39 (step S105).
  • the determination unit 35 calculates the amplitude of the RF data, and determines that the sensitivity is reduced if the amplitude is smaller than a predetermined threshold.
  • the notification information generation unit 36 When it is determined by the determination unit 35 that the sensitivity reduction occurs (step S106: Yes), the notification information generation unit 36 generates notification information for notifying the occurrence of the sensitivity decrease (step S107).
  • control unit 38 performs control to display the notification information on the display device 4 (step S108).
  • the ultrasound observation apparatus 3 ends the series of processes.
  • the control unit 38 may cause the display device 4 to end the display of the notification information. In addition, after a predetermined time has elapsed since the display device 4 starts displaying the notification information, the control unit 38 may cause the display device 4 to end the display of the notification information.
  • step S106 When it is determined by the determination unit 35 that the sensitivity reduction has not occurred (step S106: No), the notification information generation unit 36 generates notification information notifying that it is normal (step S109). Thereafter, the ultrasound observation apparatus 3 proceeds to step S108.
  • step S103 when the input unit 37 does not receive the input of the start instruction signal (step S103: No), when a predetermined time has elapsed after the start message is displayed (step S110: Yes), the ultrasonic observation apparatus 3 finishes a series of processing. When the predetermined time has not elapsed in step S110 (step S110: No), the ultrasound observation apparatus 3 returns to step S103.
  • the state of the ultrasonic transducer 23 is determined based on the echo signal from the member covering the ultrasonic probe 2 and separated from the ultrasonic transducer.
  • the state of the ultrasonic transducer can be determined using a simple configuration.
  • the state of the ultrasonic transducer is determined by comparing the data of the received image generated by the determination unit based on the RF data with the data of a predetermined reference image.
  • the configuration of the ultrasound diagnostic system according to the second embodiment is the same as that of the first embodiment.
  • components of the ultrasound diagnostic system will be described with the same reference numerals as in the first embodiment.
  • the storage unit 39 stores an individual reference image for each model of the ultrasound probe 2 connectable to the ultrasound observation apparatus 3.
  • FIG. 3 is a view showing an example of the reference image stored in the storage unit 39.
  • the reference image 100 shown in the figure displays three echo signals E1, E2, and E3 around the cap C.
  • the reference image 100 represents a multiple echo signal generated when the ultrasonic transducer 23 is in a normal state.
  • the reference image 100 is an ultrasonic image, and black and white are reversed in actual display. Further, the point A in the figure is not displayed in the image, and is described for the purpose of use in the description below.
  • FIG. 4 is a view showing an example of a received image generated by the determination unit 35 based on the RF data received from the ultrasound probe 2.
  • the determination unit 35 converts the RF data into image data by performing the same process as when the signal processing unit 33 and the ultrasound image generation unit 34 generate ultrasound image data.
  • the number of generated echo signals is one less and the luminance of the echo signal E2 is smaller than the luminance of the echo signal E1.
  • the fact that the echo signal E2 is thin is schematically shown by a broken line.
  • the received image 200 shown in FIG. 4 is reversed in black and white in actual display.
  • point A 'in the figure is described for the purpose of use in the description to be described later.
  • the determination unit 35 compares the generated data of the received image 200 with the data of the reference image 100 to calculate the similarity, and determines the state of the ultrasound transducer 23 based on the calculated similarity.
  • the similarity calculated by the determination unit 35 may be any of known image processing techniques such as pattern matching and block matching.
  • the determination unit 35 performs the state determination based on the magnitude relationship between the threshold according to the definition of the similarity and the calculated similarity.
  • the determination unit 35 determines that the ultrasonic transducer 23 is lowered in sensitivity. Note that, depending on the definition of the similarity, the determination unit 35 may determine that the sensitivity reduction occurs when the similarity is larger than the threshold.
  • FIG. 4 exemplifies a case where a part of the display is different from the reference image 100, when the received image is not displayed and is black, the determination unit 35 determines that the ultrasonic transducer 23 is faulty. It is also good.
  • the state of the ultrasonic transducer can be determined using a simple configuration.
  • the determination unit 35 may perform the state determination using a difference between luminance values at corresponding pixel positions of the reference image and the received image.
  • the point A ′ of the received image 200 shown in FIG. 4 is taken as a pixel position corresponding to the point A of the reference image 100 shown in FIG.
  • the state of the ultrasonic transducer 23 may be determined as the state in which the sensitivity reduction occurs.
  • the position of this point is not limited to the illustrated position, and can be set arbitrarily. Further, the number of sets of points for calculating the luminance difference between the reference image and the received image may be plural.
  • the control unit 38 may cause the notification unit to notify of notification information determined in advance according to the determination result of the determination unit 35 without the notification information generation unit 36 creating the notification information.
  • a lamp may be provided as the notification unit, and the control unit 38 may turn on the lamp when the determination unit 35 determines that a decrease in sensitivity occurs.
  • a plurality of lamps each emitting light of a color corresponding to the determination result may be provided as a notification unit, and a lamp of a color according to the determination result of the determination unit 35 may be turned on.
  • the information to be notified may be information regarding the determination result, and may not be the determination result itself.
  • the ultrasonic transducer may be covered with a simple cap, and the state of the ultrasonic transducer may be determined based on an echo signal from the cap.
  • the ultrasound observation apparatus 3 may incorporate a notification unit, and may notify notification information under the control of the control unit 38.
  • the transmission unit 31 automatically starts transmitting the rotation control signal and the transmission signal to the ultrasound probe 2 without waiting for the input of the start instruction signal. You may
  • the determination unit 35 When a part of a circle indicating an echo signal is cut in the received image, the determination unit 35 is a region surrounded by the hard portion 24a, the bearing 25 and the cap 26, and the ultrasonic wave propagation medium is filled. It may be determined that a bubble is generated in the area where In this case, the notification unit may notify of the generation of air bubbles.
  • the ultrasonic transducer using the simple configuration when the ultrasonic probe is connected It is useful to determine the state of

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Abstract

Le dispositif (3) d'observation à ondes ultrasonores selon l'invention comporte: une unité de détermination (35), laquelle constitue un élément recouvrant une sonde (2) à ondes ultrasonores, et laquelle détermine quel est l'état d'un transducteur ultrasonore (23) sur la base d'un signal d'écho provenant d'un élément situé à distance dudit transducteur ultrasonore (23); et une unité de commande (38) effectuant la commande consistant à communiquer des informations liées aux résultats obtenues par l'unité de détermination (35).
PCT/JP2018/045566 2017-12-20 2018-12-11 Dispositif d'observation à ondes ultrasonores, procédé de fonctionnement d'un dispositif d'observation à ondes ultrasonores et programme pour le fonctionnement d'un dispositif à ondes ultrasonores WO2019124171A1 (fr)

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JP2017244260A JP2019107420A (ja) 2017-12-20 2017-12-20 超音波観測装置、超音波観測装置の作動方法および超音波観測装置の作動プログラム
JP2017-244260 2017-12-20

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003135471A (ja) * 2001-11-01 2003-05-13 Olympus Optical Co Ltd 機械走査式超音波診断装置
JP2007244623A (ja) * 2006-03-16 2007-09-27 Hitachi Medical Corp 超音波診断装置
WO2013011800A1 (fr) * 2011-07-21 2013-01-24 日立アロカメディカル株式会社 Appareil de diagnostic ultrasonore et procédé de détection détérioration de transducteur de sonde ultrasonore
JP2017185129A (ja) * 2016-04-08 2017-10-12 東芝メディカルシステムズ株式会社 超音波診断装置及び超音波プローブの保守装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003135471A (ja) * 2001-11-01 2003-05-13 Olympus Optical Co Ltd 機械走査式超音波診断装置
JP2007244623A (ja) * 2006-03-16 2007-09-27 Hitachi Medical Corp 超音波診断装置
WO2013011800A1 (fr) * 2011-07-21 2013-01-24 日立アロカメディカル株式会社 Appareil de diagnostic ultrasonore et procédé de détection détérioration de transducteur de sonde ultrasonore
JP2017185129A (ja) * 2016-04-08 2017-10-12 東芝メディカルシステムズ株式会社 超音波診断装置及び超音波プローブの保守装置

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