Ultrasound diagnostic image processing probe device, ultrasound diagnostic imaging system, and program

Abstract

To provide a portable ultrasonic diagnostic image processing probe device for generating ultrasonic diagnostic image data by transmitting a sound wave of a predetermined frequency band to a subject and receiving an echo in the subject of the sound wave, and wirelessly transmitting it to an external display device, which can secure a long diagnosis time without impairing convenience of the ultrasonic diagnostic image processing probe device.SOLUTION: An ultrasonic diagnostic image processing probe device 10 is provided with a sensor part 15 for detecting a use status of the device itself. If a change pattern of a sensor signal value detected by the sensor part 15 satisfies a use stop condition when a radio transmission / reception part 16 of the ultrasonic diagnostic image processing probe device 10 is under a communication operation mode, the radio transmission / reception part 16 is automatically shifted to a communication stop mode, while if a change pattern of the sensor signal value satisfies a use start condition when it is under the communication stop mode, the radio transmission / reception part 16 is automatically shifted to the communication operation mode.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an ultrasonic image diagnostic system used in the fields of medical care and the like, and particularly to an ultrasonic diagnostic image processing probe device that generates ultrasonic diagnostic image data using only the probe device that constitutes the ultrasonic image diagnostic system, and the like.

Background Art

[0002] Conventionally, in the fields of medical care and the like, an ultrasonic image diagnostic system has been widely used to diagnose the states of various subjects including the human body. This type of ultrasonic image diagnostic system generally includes an ultrasonic probe device and a main body device. The ultrasonic probe device transmits sound waves (also referred to as "ultrasonic waves") in a predetermined frequency band to a subject and receives the sound waves (i.e., echoes) reflected by the subject. The main body device generates ultrasonic diagnostic image data composed of a plurality of ultrasonic diagnostic image frames obtained by imaging the subject based on a reception signal generated based on the echoes received by the ultrasonic probe device, and has a configuration to display an ultrasonic diagnostic image based on the generated data.

[0003] This type of ultrasound imaging system is very expensive and not very portable, so its use is limited to places such as medical examination rooms, making it difficult to use in individual patient rooms or in settings such as home visits. For this reason, in recent years, ultrasound imaging systems have been put into practical use that integrate the function for generating ultrasound diagnostic image data into a portable ultrasound probe device, and wirelessly transmit the ultrasound diagnostic image data generated by the ultrasound probe device alone to a display device such as a smartphone, tablet-type information and communication terminal device, or PC (personal computer), and display it on the display device, thereby enabling ultrasound imaging diagnosis at low cost without being limited to a specific location (for example, Non-Patent Document 1). Such an ultrasound probe device with a built-in ultrasound diagnostic image data generation function (hereinafter referred to as "ultrasound diagnostic image processing probe device" to distinguish it from a general ultrasound probe device) generates ultrasound diagnostic image data on its own based on the echo reception results received from the subject, and wirelessly transmits the generated ultrasound diagnostic image data to a display device, while the image display device displays the ultrasound diagnostic image based on the ultrasound diagnostic image data received from the ultrasound diagnostic image processing probe device. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] Nikkei Shimbun Online, "Terumo develops wireless ultrasound diagnostic device to support intravenous drips and other medical needs," December 8, 2020.<URL:https: / / www.nikkei.com / article / DGXZQODZ079PC0X01C20A2000000 / > [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] Incidentally, this type of ultrasound diagnostic image processing probe device is powered by a built-in battery to ensure portability and ease of use. If all functions are kept active at all times, the battery power consumption increases, limiting the number of hours available for diagnosis (hereinafter also referred to as "diagnostic time"). One way to extend the diagnostic time is to increase the battery capacity installed in the ultrasound diagnostic image processing probe device, but this increases the size and weight of the ultrasound diagnostic image processing probe device itself, reducing its convenience. Thus, there is a trade-off between the diagnostic time and the convenience of the ultrasound diagnostic image processing probe device, making it difficult to secure a long diagnostic time without sacrificing convenience.

[0006] The present invention has been made in view of the circumstances described above, and its purpose is to provide an ultrasound diagnostic image processing probe device, an ultrasound diagnostic image system, and a program, etc., that can ensure a long diagnostic time without impairing the convenience of a portable ultrasound diagnostic image processing probe device. [Means for solving the problem]

[0007] (1) In order to solve the above-mentioned problems, the present invention provides an ultrasound diagnostic image processing probe device that transmits sound waves in a predetermined frequency band to a subject and receives echoes of the sound waves in the subject to generate ultrasound diagnostic image data consisting of a plurality of ultrasound diagnostic image frames of the subject, and wirelessly transmits the generated ultrasound diagnostic image data to an external display device, comprising: sound wave transmitting and receiving means that converts an input drive signal, which is an input electrical signal, into vibrations to transmit the sound waves and receives echoes of the sound waves in the subject, and outputs an electrical signal corresponding to the echo as an output signal; driving means that inputs the input drive signal to the sound wave transmitting and receiving means to transmit the sound waves; image generation means that performs predetermined signal processing on the output signal to generate the ultrasound diagnostic image data; and the generated ultrasound diagnostic image data is transmitted wirelessly to the display device The device includes: a communication means for wirelessly transmitting data to a location; a sensor that outputs a sensor signal indicating the operating status of the device; and a control means that, (1) when a communication connection is established between the communication means and the display device, and the communication means is in a communication operating mode in which it is possible to transmit the ultrasound diagnostic image data to the display device, the pattern of change in the value of the sensor signal satisfies a predetermined first condition, the communication connection with the display device is released and the communication means switches to a communication stop mode in which it is either OFF or in a power-saving state; and (2) when the communication means's wireless communication function is in the communication stop mode and the pattern of change in the value of the sensor signal satisfies a predetermined second condition, the communication means switches the wireless communication function of the communication means back to the communication operating mode, establishes a communication connection with the display device, and transmits the ultrasound diagnostic image data to the display device.

[0008] In general, with battery-powered ultrasound diagnostic image processing probes, maintaining the wireless communication function in a constantly active state (i.e., communication mode) results in periodic data transmission and reception to maintain the communication connection with the display device. In addition, power is consumed by the RF (Radio Frequency) circuit, baseband circuit, filter circuit, etc., installed in the wireless communication module (also called the communication chip), leading to wasted battery power.

[0009] On the other hand, according to the configuration of the present invention, a sensor mounted on the ultrasound diagnostic image processing probe detects the usage status of the ultrasound diagnostic image processing probe device. When the ultrasound diagnostic image processing probe device is in communication operation mode, if its usage status satisfies the usage stop condition (i.e., the first condition) indicating that the device has been stopped from being used, the wireless communication function of the communication means is automatically switched to communication stop mode (i.e., OFF or power-saving state). Alternatively, when the device is in communication stop mode, if its usage status satisfies the usage start condition (i.e., the second condition) indicating that the device has been started from being used, the ultrasound diagnostic image processing probe device is returned (switched) to communication operation mode (i.e., returned to the ON state). Therefore, when the operator is not using the ultrasound diagnostic image processing probe for image diagnosis, the wireless communication function is automatically switched to communication stop mode while detecting the operator's cessation of device use from the sensor signal. Conversely, when the operator attempts to use the device for image diagnosis, the wireless communication function is automatically returned from communication stop mode to communication operation mode while detecting the start of device use from the sensor signal. Therefore, with this configuration, the power of the battery mounted on the ultrasound diagnostic image processing probe is not wasted, and the wireless communication function is automatically switched ON and OFF as appropriate according to the usage status of the device, thereby achieving low power consumption. As a result, with this configuration, a long diagnostic time can be secured without compromising the convenience of the portable ultrasound diagnostic image processing probe device.

[0010] (2) In addition, in the above configuration, the sensor may be a tilt sensor, and the control means may compare the tilt change pattern of the device indicated by the sensor signal value output by the sensor with the first and second conditions, and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. With this configuration, the usage state can be estimated with high accuracy from the tilt change pattern of the ultrasound diagnostic image processing probe device with a simple device configuration, and the communication stop mode and communication operation mode can be automatically switched to achieve low power consumption.

[0011] (3) In addition, in the configuration of claim 1, the sensor may be an acceleration sensor, and the control means may compare at least one of (1) a change pattern of the tilt of the self-propelled device and (2) a change pattern of the vibration of the self-propelled device, which are detected based on the value of the sensor signal output by the sensor, with the first and second conditions, and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. With this configuration, the usage state can be accurately estimated based on at least one of the change pattern of the tilt and the change pattern of the vibration of the ultrasound diagnostic image processing probe device with a simple device configuration, and the communication stop mode and communication operation mode can be automatically switched to achieve low power consumption.

[0012] (4) In addition, in the configuration described in claim 1, the sensor may be a switch, and the control means may compare the pressing pattern of the switch with the first and second conditions and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. With this configuration, the usage status of the ultrasound diagnostic image processing probe device can be accurately estimated in response to the operator's operation of the switch, and low power consumption can be achieved by switching between the communication stop mode and the communication operation mode with a very simple configuration.

[0013] (5) In addition, in the configuration described in claim 1, the sensor may be a pressure sensor, and the control means may compare the pressure change pattern indicated by the sensor signal value with the first and second conditions, and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. Generally, an ultrasound diagnostic image processing probe device is used by pressing the installation part of the transducer (transducer array 11 described later), which is provided at the tip of the device, against a subject. Therefore, by placing a pressure sensor adjacent to the transducer and detecting the pressure applied to the installation part of the transducer with this pressure sensor, it is possible to accurately detect whether or not the ultrasound diagnostic image processing probe device is actually being used on a subject. Accordingly, with this configuration, the actual usage status of the ultrasound diagnostic image processing probe device can be accurately estimated, and low power consumption can be achieved by automatically switching between the communication stop mode and the communication operation mode based on the estimation result.

[0014] (6) In addition, in the configuration described in claim 1, the sensor may be configured by combining a tilt sensor and a pressure sensor, and the control means may compare the combination of (A) the pattern of change in the tilt of the device indicated by the sensor signal value output by the sensor and (B) the pattern of change in pressure indicated by the sensor signal value with the first and second conditions, and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. Normally, when an ultrasound diagnostic image processing probe device is used for diagnosis, the operator holds the device body and operates it, so the stopping and starting of the use of the device can be detected based only on the pattern of change in tilt, but it is not possible to exclude the possibility that the operator's operation does not satisfy the first and second conditions corresponding to the predetermined tilt pattern. On the other hand, by combining a tilt sensor and a pressure sensor and detecting the stopping and starting of the use of the device by combining the patterns of change in tilt and pressure, it is possible to reliably prevent the occurrence of this type of detection error and reliably achieve low power consumption.

[0015] (7) In addition, in the configuration described in claim 1, the sensor may be configured by combining an acceleration sensor and a pressure sensor, and the control means may compare the combination of (A1) the change pattern of vibration of the device itself, or (A2) the change pattern of tilt, and (B) the change pattern of pressure, indicated by the sensor signal value output by the sensor, with the first and second conditions, and switch the mode of the communication means between the communication operation mode and the communication stop mode based on the comparison result. When a configuration combining a tilt sensor and a pressure sensor is adopted as described above, only the change pattern of tilt of the device can be detected, but with this configuration, not only the change pattern of tilt of the device but also the change pattern of vibration of the device can be detected, so that the stopping and starting of use of the device can be detected with high accuracy from various viewpoints, and accurate mode switching control can be realized according to the usage situation.

[0016] (8) The configuration described in any one of claims 1 to 7 may further include a receiving means for receiving input operations from an operator, wherein the image generation means extracts the ultrasound diagnostic image frame captured at the timing when the input operation is received by the receiving means, and the communication means transmits the extracted ultrasound diagnostic image frame together with the ultrasound diagnostic image data to the display device. With this configuration, several ultrasound diagnostic image frames that best show the current state of the part to be diagnosed (for example, organs such as the heart, liver, kidneys, and blood vessels) can be extracted, and these extracted ultrasound diagnostic image frames can be transmitted to the display device together with the moving ultrasound diagnostic image data, and the extracted frame images can be displayed on the display device together with the moving images and used for diagnosis, thereby improving the accuracy of the diagnosis.

[0017] (9) The present invention also provides an ultrasound diagnostic imaging system comprising: an ultrasound diagnostic image processing probe device that generates ultrasound diagnostic image data consisting of a plurality of ultrasound diagnostic image frames of a subject by transmitting sound waves in a predetermined frequency band to a subject and receiving echoes of the sound waves in the subject; and a display device that acquires the ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device by wireless communication and displays an ultrasound diagnostic image of the subject based on the data, wherein the ultrasound diagnostic image processing probe device comprises: sound wave transmitting and receiving means that converts an input drive signal, which is an input electrical signal, into vibrations to transmit the sound waves and receives echoes of the sound waves in the subject and outputs an electrical signal corresponding to the echo as an output signal; driving means that input the input drive signal to the sound wave transmitting and receiving means to transmit the sound waves; and performing predetermined signal processing on the output signal and the ultrasound diagnostic image data The device includes: an image generation means for generating images; a communication means for wirelessly transmitting the generated ultrasound diagnostic image data to the display device; a sensor that outputs a sensor signal indicating the operating status of the device; and a control means that, (1) when a communication connection is established between the communication means and the display device, and the communication means is in a communication operation mode in which it is possible to transmit the ultrasound diagnostic image data to the display device, the pattern of change in the value of the sensor signal satisfies a predetermined first condition, the communication connection with the display device is released and the communication means switches to a communication stop mode in which the wireless communication function is OFF or in a power-saving state; and (2) when the wireless communication function of the communication means is in the communication stop mode and the pattern of change in the value of the sensor signal satisfies a predetermined second condition, the wireless communication function of the communication means is switched to the communication operation mode, and the communication connection with the display device is established and the ultrasound diagnostic image data is transmitted to the display device.

[0018] (10) In addition, the configuration described in claim 9 may include a plurality of ultrasound diagnostic image processing probe devices and a single display device, wherein the display device has established a communication connection with any of the plurality of ultrasound diagnostic image processing probe devices and is acquiring and displaying the ultrasound diagnostic image data from the ultrasound diagnostic image processing probe device, and when the ultrasound diagnostic image processing probe device transitions from the communication operation mode to the communication stop mode or power-off state, the display device may establish a communication connection with the ultrasound diagnostic image processing probe device that has returned to the communication operation mode, or with another ultrasound diagnostic image processing probe device that is in the communication operation mode, and acquire the ultrasound diagnostic image data from the ultrasound diagnostic image processing probe device and display the ultrasound diagnostic image based on the ultrasound diagnostic image data. With this configuration, a plurality of ultrasound diagnostic image processing probe devices can be operated with a single display device. As a result, with this configuration, it is possible to improve the degree of freedom in system construction, such as operating a plurality of ultrasound diagnostic image processing probe devices with different shapes and sound wave frequency bands used with a single display device according to the area to be diagnosed, and to construct a low-cost, user-friendly system.

[0019] (11) The present invention also includes a computer that functions as an ultrasound diagnostic image processing probe device that generates ultrasound diagnostic image data consisting of a plurality of ultrasound diagnostic image frames of a subject by transmitting sound waves of a predetermined frequency to a subject and receiving echoes of the sound waves in the subject, and wirelessly transmits the generated ultrasound diagnostic image data to an external display device for display, and controls an image generation means for generating the ultrasound diagnostic image data based on the reception result of echoes of the sound waves in the subject, an acquisition means for acquiring sensor signals indicating the usage status of the device, and a communication means for wirelessly transmitting the generated ultrasound diagnostic image data to the display device, wherein (1) the communication connection between the communication means and the display device is (2) When the change pattern of the sensor signal value satisfies a predetermined first condition while the communication means is in a communication operating mode that has been established and is capable of transmitting the ultrasound diagnostic image data to the display device, the communication connection with the display device is released and the communication means switches to a communication stop mode that is either OFF or in a power-saving state. [Effects of the Invention]

[0020] The ultrasound diagnostic image processing probe, ultrasound diagnostic system, and program of the present invention can ensure a long diagnostic time without compromising the convenience of a portable ultrasound diagnostic image processing probe device. [Brief explanation of the drawing]

[0021] [Figure 1] This is a system configuration diagram showing an example of the configuration in one embodiment of the ultrasound imaging diagnostic system according to the present invention. [Figure 2]It is a block diagram showing a configuration example of an ultrasonic diagnostic image processing probe device according to an embodiment. [Figure 3] It is a diagram showing in a list form examples of usage stop conditions and usage start conditions for each type of detection result used by a sensor mounted on an ultrasonic diagnostic image processing probe device according to an embodiment. [Figure 4] It is a sequence diagram showing the processing when an ultrasonic diagnostic image processing probe device returns from a communication stop mode to a communication operation mode in an ultrasonic diagnostic image system according to an embodiment. [Figure 5] It is a sequence diagram showing the processing when an ultrasonic diagnostic image processing probe device shifts from a communication operation mode to a communication stop mode in an ultrasonic diagnostic image system according to an embodiment. [Figure 6] It is a sequence diagram showing the processing when a plurality of ultrasonic diagnostic image processing probe devices simultaneously return from a communication stop mode to a communication operation mode in an ultrasonic diagnostic image system according to Modification 1.

Mode for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described while referring to the drawings. The following embodiments are for an ultrasonic diagnostic image system that transmits sound waves (ultrasonic waves) in a predetermined frequency band to a part of the human body as a subject while receiving echoes of the sound waves in the subject and generates and displays ultrasonic diagnostic image data composed of a plurality of ultrasonic diagnostic image frames obtained by imaging the subject. The ultrasonic diagnostic image processing probe device, ultrasonic diagnostic image system, and program according to the present invention are applied. However, the embodiments described below do not unduly limit the content of the present invention described in the claims, and not all of the configurations described in the present embodiment are essential constituent elements of the present invention.

[0023] [1] Configuration and Outline of Ultrasonic Diagnostic Image System First, the configuration and overview of the ultrasound imaging diagnostic system 1 in one embodiment of the present invention will be described using Figure 1. Figure 1 is a system configuration diagram showing one example of the configuration of the ultrasound imaging diagnostic system 1 of this embodiment. Also, in order to prevent the drawing from becoming complicated, only some of the ultrasound diagnostic image processing probe devices 10 are shown in Figure 1. Furthermore, the number of ultrasound diagnostic image processing probe devices 10 that constitute the ultrasound imaging diagnostic system 1 is arbitrary, and there may be one or multiple devices. However, in this embodiment, in order to facilitate understanding of the explanation, the ultrasound imaging diagnostic system 1 will be described as being composed of one ultrasound diagnostic image processing probe device 10 and one display device 20. The case in which the ultrasound imaging diagnostic system 1 is composed of multiple ultrasound diagnostic image processing probe devices 10 and one display device 20 will be described in the section on Modification 1.

[0024] As shown in Figure 1, the ultrasound imaging diagnostic system 1 of this embodiment is portable by the operator and consists of an ultrasound diagnostic image processing probe device 10-1 to n (hereinafter referred to as "ultrasound diagnostic image processing probe device 10" when it is not necessary to specify each device) and a display device 20. The probe device transmits sound waves having a predetermined frequency band (for example, any frequency band from 2 MHz to 22 MHz) and receives echoes from the subject of the sound waves, and generates (i.e., captures) ultrasound diagnostic image data of the subject based on the received echoes. The ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device 10 is transmitted wirelessly to the display device 20, and the display device 20 displays the ultrasound diagnostic image (moving image) of the subject. Furthermore, the frequency band of the sound waves transmitted by the ultrasound diagnostic image processing probe device 10 and the device shape are arbitrary. For example, (1) sector type or convex type using sound waves of 2 to 7.5 MHz, (2) linear type using sound waves of 2 to 12 MHz, (3) single type using sound waves of 2 to 22 MHz, etc., and the frequency band and shape used may be changed depending on the area to be diagnosed. Alternatively, a transducer array 11 and an ultrasonic drive unit 12 (see Figure 2) capable of transmitting and receiving broadband frequency sound waves (for example, sound waves in the frequency band of about 2 to 25 MHz) may be used, and the device shape and the frequency band of the sound waves used may be changed by attaching and detaching attachments depending on the area to be examined. Furthermore, when the ultrasound imaging diagnostic system 1 is configured with multiple ultrasound diagnostic image processing probe devices 10, it is also possible to operate multiple ultrasound diagnostic image processing probe devices 10, each having a shape suitable for each target area (organ) such as the heart, kidneys, and blood vessels, and capturing ultrasound diagnostic images using sound waves in a frequency band suitable for diagnosing the said area, using a single display device 20. This point will be described in detail in Modification 1.

[0025] As described above, the ultrasound diagnostic image processing probe device 10 is powered by a built-in battery to ensure portability and convenience. Using the power of this built-in battery, it drives the various parts described later, generates ultrasound diagnostic image data, and wirelessly transmits it to the display device 20. Therefore, if all functions are kept active at all times, power consumption will increase and the diagnostic time will decrease, while increasing the size of the battery is likely to impair portability and convenience.

[0026] Therefore, the ultrasound diagnostic image processing probe device 10 of this embodiment is equipped with a sensor unit 15 (see Figure 2) for detecting the usage status of the device, and compares the change pattern of the sensor signal output from the sensor unit 15 with predetermined conditions, and switches the function of the wireless transmission / reception unit 16 (see Figure 2) between (A) a communication operation mode that enables wireless transmission of ultrasound diagnostic image data and (B) a communication stop mode that turns off the wireless communication function or puts it in a power-saving state, and maintains the wireless communication function in the communication stop mode during periods when it is not used for diagnosing a subject, thereby reducing the amount of battery power consumed by the ultrasound diagnostic image processing probe device 10.

[0027] Specifically, the ultrasound diagnostic image processing probe device 10 of this embodiment performs the following control: (1) When the wireless transceiver unit 16 is in communication operation mode (i.e., a communication connection with the display device 20 has been established and ultrasound diagnostic image data can be transmitted to the display device 20), if the change pattern of the sensor signal satisfies the conditions for stopping use of the ultrasound diagnostic image processing probe device 10, the communication connection with the display device 20 is released (disconnected) and the wireless transceiver unit 16 is moved to communication stop mode; and (2) When the wireless transceiver unit 16 is in communication stop mode and the change pattern of the sensor signal value satisfies the predetermined conditions for starting use of the ultrasound diagnostic image processing probe device 10, the wireless transceiver unit 16 is restored to communication operation mode while establishing a communication connection with the display device 20. The type of sensor used in the sensor unit 15 is arbitrary, and for example, a tilt sensor, a three-axis acceleration sensor (hereinafter also referred to as "accelerometer"), a pressure sensor, etc. can be used, and these sensors can be used in combination. Furthermore, the conditions for stopping use and starting use in this embodiment correspond to the "first condition" and "second condition" of the present invention, respectively. The specific content of these conditions will change depending on the type of sensor used and the detection result (e.g., tilt, vibration, pressure, etc.). The specific content of the conditions for starting use and stopping use according to the type of sensor used and the detection result will be described in detail later.

[0028] The ultrasound diagnostic image processing probe device 10 transmits ultrasound waves to a subject, generates ultrasound diagnostic image data consisting of multiple frame images based on the echoes from the subject, and transmits it to the display device 20. The ultrasound diagnostic image processing probe device 10 has an operation unit 17, described later, which includes various buttons for starting ultrasound diagnostic image acquisition, stopping acquisition, screen capture, etc., and generates ultrasound diagnostic image data consisting of multiple frame images while repeatedly transmitting sound waves and receiving echoes in response to button operations by the operator, and transmits it to the display device 20. The specific data structure and transmission method of the ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device 10 are arbitrary. For example, it may be configured to capture multiple ultrasound diagnostic image frames from the timing of pressing the acquisition start button to the timing of pressing the acquisition stop button, compress the data using an inter-frame predictive coding method such as MPEG2 (Moving Picture Expert Group) 2, H.264, or H.265 to generate moving image data, and then sequentially transmit the generated moving image data to the display device 20. In this case, if the system is configured so that when the operator operates the screen capture button, the ultrasound diagnostic image frame captured at that time is extracted as a still image and supplied (transmitted) to the display device 20 together with the moving ultrasound diagnostic image data, then several ultrasound diagnostic image frames that best show the current state of the area to be diagnosed (for example, organs such as the heart, liver, kidneys, and blood vessels) can be extracted, and these extracted ultrasound diagnostic image frames are transmitted to the display device 20 together with the moving ultrasound diagnostic image data. The display device 20 then displays the extracted frame images together with the moving images, making it possible to use them for diagnosis and improving the accuracy of the diagnosis. Note that the basic operation and principle of generating ultrasound diagnostic image data and transmitting it to the display device 20 in the ultrasound diagnostic image processing probe device 10 is the same as in the conventional method, so the details are omitted. The ultrasound diagnostic image processing probe device 10 may also be configured to detect the heart sound of the subject along with the ultrasound diagnostic image data and generate ultrasound diagnostic image data including sound, or generate sound data synchronized with the ultrasound diagnostic image data and transmit it to the display device 20 together with the ultrasound diagnostic image data.

[0029] The display device 20 is a general information and communication terminal device such as a tablet, smartphone, laptop, or desktop PC, and for example, an iPad® or iPad mini® can be used.

[0030] This display device 20 has a display unit (not shown) consisting of a liquid crystal display or an organic EL (Electro-Luminescence) display and a display drive circuit, a speaker, and an operation unit (not shown) provided on the display screen, such as a touch panel and a home button, and is configured to execute various processes in response to the operator's input. The operation unit may also be configured to allow connection of external input devices such as a mouse or keyboard.

[0031] Furthermore, the display device 20 has a wireless communication function that communicates wirelessly with the ultrasound diagnostic image processing probe device 10 in accordance with the same communication protocol as the wireless transceiver 16 mounted on the ultrasound diagnostic image processing probe device 10. The wireless communication method used for communication between the display device 20 and the ultrasound diagnostic image processing probe device 10 is arbitrary, and various communication protocols can be adopted, such as a communication method that conforms to the so-called wireless LAN (Local Area Network) protocol defined by IEEE (Institute of Electrical and Electronics Engineers) 802.11a, b, g, n, ac, or a communication method that conforms to the Bluetooth® communication protocol defined by IEEE 802.15.1. However, in this embodiment, in order to make the explanation more concrete, the explanation will be given assuming the use of a wireless LAN communication method. To realize the above functions, the memory (not shown) of the display device 20 of this embodiment pre-records an ESSID (Extended Service Set Identifier) ​​corresponding to the ultrasound diagnostic image processing probe device 10 that constitutes the ultrasound diagnostic imaging system 1. It also pre-records data related to encryption and decryption keys compliant with WEP (Wired Equivalent Privacy), WPA (Wi-Fi Protected Access), WPA2, WPA3, etc., used to establish a secure communication connection with the ultrasound diagnostic image processing probe device 10. The configuration is such that a secure communication connection is established with the target ultrasound diagnostic image processing probe device 10 using this data, but the SSID and encryption and decryption keys are the same as those of conventional wireless LANs.

[0032] A feature of this embodiment is that the display device 20 acquires data corresponding to ultrasound diagnostic image data (which may include extracted ultrasound diagnostic image frames and audio data) from the ultrasound diagnostic image processing probe device 10, which is the source of the ultrasound diagnostic image data, and is equipped with an application program (hereinafter also referred to as the "display app") for displaying the ultrasound diagnostic image based on the ultrasound diagnostic image data. By executing processing according to this display app, the display device 20 acquires ultrasound diagnostic image data generated in the target ultrasound diagnostic image processing probe device 10 and realizes the function of displaying the ultrasound diagnostic image based on the acquired ultrasound diagnostic image data. Note that the display app does not need to be pre-installed on the display device 20; it is sufficient if it can be downloaded in advance and made executable before use. Furthermore, the display format when the display device 20 displays the ultrasound diagnostic image according to the display app is arbitrary. For example, it may be configured to display the ultrasound diagnostic image as a moving image in one area and the ultrasound diagnostic image frames extracted by the screen capture function in another area, and to display the moving image and the extracted ultrasound diagnostic image frames simultaneously in each area. Alternatively, it may be configured to switch between displaying the moving image and the extracted ultrasound diagnostic image frames in response to input operations on the control unit. Furthermore, the display may be configured to enlarge or reduce a portion of the image by performing pinch-in or pinch-out operations in the display area of ​​the moving image or extracted ultrasound diagnostic image frame, or a method may be adopted in which the extracted ultrasound diagnostic image frame is switched to the next extracted ultrasound diagnostic image frame in response to a flick operation. Each input operation can, of course, be replaced by input operations on a keyboard or mouse. In addition, the process of the display device 20 establishing a communication connection with the ultrasound diagnostic image processing probe device 10 may be carried out by installing a dedicated driver application, but in this embodiment, the explanation will be based on the assumption that the establishment and release of the communication connection are controlled by this display application.

[0033] [2] Configuration of the ultrasound diagnostic image processing probe device 10 Next, the configuration of the ultrasound diagnostic image processing probe device 10 of this embodiment will be described using Figures 2 and 3. Figure 2 is a block diagram showing an example of the configuration of the ultrasound diagnostic image processing probe device 10 of this embodiment, and Figure 3 is a diagram showing, in table format, examples of sensors used as the sensor unit 15 and the conditions for stopping and starting use for each type of detection result used.

[0034] As shown in Figure 2, the ultrasound diagnostic image processing probe device 10 of this embodiment comprises a transducer array 11, an ultrasound drive unit 12, an ultrasound receiver unit 13, a control unit 14, a sensor unit 15, a wireless transceiver unit 16, an operation unit 17 having buttons such as a power button, a sound wave transmission start button, a sound wave transmission stop button, and a screen capture button, which supplies operation commands to the control unit 14 according to the operator's input, and a memory 18. Each unit is supplied with the power necessary for operation from a built-in battery (not shown). For example, the transducer array 11 and the ultrasound drive unit 12 of this embodiment constitute the "sound wave transmission and reception means" and the "drive means" of the present invention, respectively.

[0035] The transducer array 11 is installed at a location such as the tip of a housing (not shown) and comprises a plurality of ultrasonic transducers 112 arranged along the transmitting and receiving surface 111. Each of the plurality of ultrasonic transducers 112 is composed of an element such as a piezoelectric element, and when an electrical signal is input from the signal processing unit 141 of the control unit 14 (described later), it vibrates based on the input electrical signal (hereinafter also referred to as the "input drive signal") and transmits sound waves in a predetermined frequency band. At the same time, it generates an electrical signal based on the vibration obtained when it receives the echo of the sound waves in the subject and outputs it as an output signal to the ultrasonic receiving unit 13. Each ultrasonic transducer 112 may be arranged in two orthogonal directions.

[0036] The ultrasonic drive unit 12 is composed of circuits such as an amplifier, and under the control of the control unit 14, it generates an input drive signal and supplies it to the transducer array 11.

[0037] The ultrasonic receiving unit 13 includes an amplifier and an A / D (analog-to-digital) converter that amplify the output signal supplied from the transducer array 11, and converts the output signal supplied from the transducer array 11 into a digital signal and supplies it to the control unit 14.

[0038] The sensor unit 15 is composed of sensors such as tilt sensors, acceleration sensors, gyro sensors, and pressure sensors, as well as input switches, or combinations thereof. It generates sensor signals indicating the usage status of the ultrasound diagnostic image processing probe device 10 and outputs the generated sensor signals to the control unit 14. For example, when an acceleration sensor is used as the sensor unit 15, the sensor unit 15 detects changes in acceleration in each of the XYZ axes accompanying the movement of the device, performs sampling at a predetermined sampling frequency (for example, around 100 Hz), generates a sensor signal indicating the detected change in acceleration, and supplies it to the control unit 14. When a pressure sensor is used as the sensor unit 15, it is necessary to place the pressure sensor adjacent to the transducer array 11.

[0039] The wireless transceiver unit 16 is a wireless communication module such as a wireless LAN or Bluetooth®, and is composed of various circuits such as an antenna, RF circuit, baseband circuit, and filter circuit (not shown). It works in conjunction with the control unit 14 to establish a communication connection with the display device 20 and transmit ultrasound diagnostic image data to the display device 20. A feature of this embodiment is that the wireless transceiver unit 16 is configured to switch between a communication operation mode and a communication stop mode. Under the control of the wireless control unit 143 (described later), in the communication operation mode, it maintains a state in which it can transmit ultrasound diagnostic image data by consuming power in its internal circuitry while maintaining a communication connection with the display device 20. In the communication stop mode, it releases the communication connection with the display device 20 and switches to an OFF or low-power standby state. The wireless transceiver unit 16 in this embodiment is configured to perform wireless communication according to the same communication protocol as the wireless communication function installed in the display device 20.

[0040] Memory 18 is configured using a combination of NAND or NOR flash memory, ROM (read-only memory), RAM (Random Access Memory), etc., and stores the program executed by the control unit 14, as well as data related to the ESSID assigned to the device and encryption and decryption keys. Memory 18 also pre-stores data corresponding to the conditions for stopping use and starting use used when switching modes of the ultrasound diagnostic image processing probe device 10 (hereinafter, these data are referred to as "stop-use condition data" and "start-use condition data"). Furthermore, Memory 18 is also used as a work area when the control unit 14 generates ultrasound diagnostic image data, etc. Preferably, Memory 18 is configured to temporarily record the data of the extracted ultrasound diagnostic image frame when the ultrasound diagnostic image frame captured at the timing of the screen capture button operation is extracted.

[0041] The control unit 14 is composed of, for example, an ultrasonic processing LSI (Large Scale Integration), an FPGA (Field Programmable Gate Array), a CPU (Central Processing Unit), etc. The control unit 14 then implements (a) a signal processing unit 141, (b) an image processing unit 142, and (c) a wireless control unit 143 by executing processing based on a program recorded in the memory 18, or by executing processing pre-programmed on the circuit.

[0042] (Signal processing unit 141) The signal processing unit 141 supplies control signals to the ultrasonic drive unit 12 based on operation commands supplied from the operation unit 17 (A), thereby controlling the supply of input drive signals from the ultrasonic drive unit 12 to the transducer array 11 to start or stop. The signal processing unit 141 also performs filtering and other processing on the digital data corresponding to the output signal supplied from the ultrasonic receiver unit 13, and supplies it to the image processing unit 142.

[0043] (Image processing unit 142) The image processing unit 142 generates ultrasound diagnostic image data of the subject based on the data supplied from the signal processing unit 141 and temporarily records it in the memory 18. Furthermore, when the image processing unit 142 receives an operation command from the operation unit 17 indicating that the screen capture button has been operated, it extracts the ultrasound diagnostic image frame captured at that operation timing, temporarily records it in the memory 18, and maintains it in a state where it can be transmitted to the display device 20 along with the ultrasound diagnostic image data. For example, in this embodiment, the image processing unit 142, in conjunction with the ultrasound receiving unit 13 and the signal processing unit 141, constitutes the "image generation means" of the present invention, while the operation unit 17 constitutes the "reception means".

[0044] (Wireless control unit 143) The wireless control unit 143, in conjunction with the image processing unit 142 and the memory 18, controls the transmission of ultrasound diagnostic image data and extracted ultrasound diagnostic image frames via the wireless transceiver unit 16. The wireless control unit 143 also monitors the sensor signal supplied from the sensor unit 15 and compares the change pattern of the sensor signal with the deactivation condition data and activation condition data recorded in the memory 18. The wireless control unit 143 then controls the following: (1) If the wireless transceiver unit 16 is in communication operation mode and the change pattern of the sensor signal satisfies the deactivation condition, it releases the established communication connection with the display device 20 and switches the wireless transceiver unit 16 to communication deactivation mode to reduce power consumption; and (2) If the wireless transceiver unit 16 is in communication deactivation mode and the change pattern of the sensor signal satisfies the activation condition, it switches the wireless transceiver unit 16 to communication operation mode, establishes a communication connection with the display device 20, and transmits ultrasound diagnostic image data to the display device 20. In this embodiment, the wireless control unit 143, in conjunction with the wireless transceiver unit 16, constitutes the "communication means" and "control means" of the present invention, and also constitutes the "acquisition means" in conjunction with the sensor unit 15.

[0045] [3] Change patterns of sensor signal values ​​and mode switching conditions of the wireless transceiver 16 Next, using Figure 3, the specific conditions (i.e., start and stop conditions) for the wireless control unit 143 to switch the mode of the wireless transceiver unit 16 in the ultrasound diagnostic image processing probe device 10 of this embodiment will be explained for each type of sensor used as the sensor unit 15 and for each type of detection result. In Figure 3, items 1 to 9 are assigned to each type of sensor and detection result used, and the start and stop conditions for each sensor and detection result used corresponding to each item number are shown in the form of a table. Also in Figure 3, the state of the ultrasound diagnostic image processing probe device 10 for each of the XYZ axes is shown by shaded rectangles.

[0046] [3.1] Conditions for when a tilt sensor is used as the sensor unit 15, and the wireless control unit 143 determines when to stop and start use based on the change pattern of the tilt of the unit detected by the tilt sensor (item 1) In this case, as shown in the first row of Figure 3, (1a) if the sensor signal output from the sensor unit 15 continues to have an output value for a horizontal state (e.g., signal value = 0) for a certain period of time or longer (e.g., 1 minute or more), the wireless control unit 143 determines that the conditions for stopping use have been met, while (1b) if the sensor signal continues to have an output value exceeding a threshold (e.g., a signal value corresponding to an inclination of 10° or more) for a certain period of time or longer, the wireless control unit 143 determines that the conditions for starting use have been met.

[0047] [3.2] When an acceleration sensor is used as the sensor unit 15 In this case, as shown in the second, third, and sixth rows of Figure 3, there are three methods: (2A) a method in which the wireless control unit 143 determines whether to stop and start using the ultrasound diagnostic image processing probe device 10 based on the tilt change pattern of the ultrasound diagnostic image processing probe device 10 detected by the acceleration sensor (item 2); (2B) a method in which the wireless control unit 143 determines whether to stop and start using the ultrasound diagnostic image processing probe device 10 based on the vibration change pattern detected by the acceleration sensor (item 3); and (2C) a method in which the wireless control unit 143 determines whether to stop and start using the ultrasound diagnostic image processing probe device 10 based on a combination of the tilt change pattern and the vibration change pattern detected by the acceleration sensor (item 6).

[0048] (2A) If the wireless control unit 143 employs a method to detect the stopping and starting of use of the ultrasound diagnostic image processing probe device 10 based on the tilt change pattern detected by the acceleration sensor (item 2), then (2A-a) the wireless control unit 143 may determine that the stopping condition is met if the composite acceleration calculated by the wireless control unit 143 for tilt detection based on the sensor signal output from the sensor unit 15 remains in a steady state for a certain period of time or longer (for example, 1 minute or more), while (2A-b) the wireless control unit 143 may determine that the starting condition is met if the output values ​​of the Z axis and Y axis of the acceleration sensor remain above a threshold for a certain period of time or longer (for example, 5 seconds or more).

[0049] (2B) If the wireless control unit 143 employs a method to detect the stopping and starting of use of the ultrasound diagnostic image processing probe device 10 based on the vibration change pattern detected by the acceleration sensor (item 3), then (2B-a) the wireless control unit 143 may determine that the stopping condition is met if the composite acceleration calculated by the wireless control unit 143 for vibration detection from the sensor signal output from the sensor unit 15 remains in a steady state for a certain period of time or longer (for example, 1 minute or more), while (2B-b) the wireless control unit 143 may determine that the starting condition is met if the composite acceleration calculated by the wireless control unit 143 for vibration detection from the sensor signal continues to change for a certain period of time or longer (for example, 5 seconds or more).

[0050] (2C) If the wireless control unit 143 employs a method for detecting the stopping and starting of use of the ultrasound diagnostic image processing probe device 10 based on a combination of tilt change pattern and vibration change pattern detected by the acceleration sensor (item 6), then (2C-a) the wireless control unit 143 may determine that the stopping condition is met if the composite acceleration calculated by the wireless control unit 143 for vibration detection from the sensor signal output from the sensor unit 15 remains in a steady state for a certain period of time or longer (for example, 1 minute or more), while (2C-b) the wireless control unit 143 may determine that the starting condition is met if the output values ​​of the Z axis and Y axis in the tilt detection of the acceleration sensor remain above a threshold for a certain period of time or longer (for example, 5 seconds or more), and the composite acceleration calculated from the sensor signal for vibration detection continues to change for a certain period of time or longer (for example, 5 seconds or more). Furthermore, when the wireless control unit 143 determines whether to stop or start using the ultrasound diagnostic image processing probe device 10 based on a combination of the tilt change pattern and vibration change pattern of the device itself, it is also possible to adopt a configuration in which the sensor unit 15 combines an acceleration sensor and a tilt sensor, and the tilt change pattern is detected by the tilt sensor instead of the tilt change pattern detected by the acceleration sensor.

[0051] [3.3] When a switch is used as the sensor unit 15 (item 4) In this case, as shown in the fourth row of Figure 3, (3a) when the switch constituting the sensor unit 15 is turned OFF, the wireless control unit 143 determines that the conditions for stopping use have been met, while (3b) when the switch is turned ON, the wireless control unit 143 determines that the conditions for starting use have been met. Note that the switch pressing patterns that constitute the conditions for stopping use and starting use when using the switch as the sensor unit 15 are not limited to these, and various conditions can be set, for example, by determining that the conditions for starting use are met when the switch is pressed once, and that the conditions for stopping use are met when it is pressed twice or held down.

[0052] [3.4] When a pressure sensor is used as the sensor unit 15, and the wireless control unit 143 detects the stopping and starting of use of the ultrasound diagnostic image processing probe device 10 based on the pressure change pattern (item 5) Generally, when diagnosing the condition of a subject using the ultrasound diagnostic image processing probe device 10, the device is used in which the part of the ultrasound diagnostic image processing probe device 10 on which the transducer array 11 is installed is pressed against the subject, sound waves are transmitted to the subject, and the echo is received. Therefore, by placing a pressure sensor constituting the sensor unit 15 adjacent to the transducer array 11 in the ultrasound diagnostic image processing probe device 10 and monitoring the pressure change pattern detected by the pressure sensor, it becomes possible to reliably determine whether or not the ultrasound diagnostic image processing probe device 10 is actually being used.

[0053] In the case where a pressure sensor is provided adjacent to the transducer array 11 in this manner, as shown in the fifth row of Figure 3, (4a) if the sensor signal output from the sensor unit 15 continues to have an output value that is the same as when there is no pressure (e.g., signal value = 0) for a certain period of time or longer (e.g., 1 minute or more), the wireless control unit 143 may determine that the conditions for stopping use have been met, while (4b) if the sensor signal continues to have an output value that exceeds a predetermined threshold for a certain period of time or longer (e.g., 5 seconds or more) (i.e., if a pressure of a predetermined value or higher is detected for a certain period of time or longer), the wireless control unit 143 may determine that the conditions for starting use have been met.

[0054] [3.5] When a combination of a tilt sensor and a pressure sensor is used as the sensor unit 15, and the wireless control unit 143 detects the stopping and starting of use of the ultrasound diagnostic image processing probe device 10 based on the combination of the tilt change pattern and the pressure change pattern of the device (item 7) In this case, as shown in the 7th row of Figure 3, (5a) if the sensor signal obtained from the tilt sensor maintains the output value when horizontal, and the sensor signal obtained from the pressure sensor maintains the output value when no pressure is present, the wireless control unit 143 determines that the conditions for stopping use have been met, while (5b) if the sensor signal obtained from the tilt sensor exceeds a threshold, and the pressure value detected by the pressure sensor exceeds a threshold, the wireless control unit 143 determines that the conditions for starting use have been met. Normally, when using the ultrasound diagnostic image processing probe device 10, the operator holds the device body and operates it, so it is possible to detect the stopping and starting of use based only on the tilt change pattern. However, it is not possible to eliminate the possibility that the operator's operation does not meet the conditions for stopping use and starting use that correspond to the predetermined tilt change pattern. In this regard, by combining a tilt sensor and a pressure sensor, and detecting the stopping and starting of use by combining the tilt change pattern and the pressure change pattern, it is possible to reliably prevent the occurrence of this type of detection error while reliably achieving low power consumption.

[0055] [3.6] When a combination of an acceleration sensor and a pressure sensor is used as the sensor unit 15 (items 8 and 9) In this case, as shown in rows 8 and 9 of Figure 3, there are two methods: (6A) a method in which the wireless control unit 143 determines whether to stop or start using the ultrasound diagnostic image processing probe device 10 based on a combination of the tilt change pattern of the ultrasound diagnostic image processing probe device 10 detected by the acceleration sensor and the pressure change pattern detected by the pressure sensor (item 8); and (6B) a method in which the wireless control unit 143 determines whether to stop or start using the ultrasound diagnostic image processing probe device 10 based on a combination of the vibration change pattern detected by the acceleration sensor and the pressure change pattern detected by the pressure sensor (item 9).

[0056] (6A) If the wireless control unit 143 employs a method for determining when to stop and start using the ultrasound diagnostic image processing probe device 10 based on a combination of a tilt change pattern detected by an acceleration sensor and a pressure change pattern detected by a pressure sensor (item 8), then (6A-a) the wireless control unit 143 may determine that the conditions for stopping use are met when the composite acceleration calculated by the wireless control unit 143 for tilt detection based on the sensor signals of the acceleration sensors constituting the sensor unit 15 is in a steady state and the pressure value detected by the pressure sensor is maintained at no pressure for a certain period of time or longer (for example, 1 minute or more), while (6A-b) the wireless control unit 143 may determine that the conditions for starting use are met when the output values ​​of the Z axis and Y axis of the acceleration sensor exceed a threshold and the pressure value detected by the pressure sensor remains above the threshold for a certain period of time or longer (for example, 5 seconds or more).

[0057] (6B) In the case where the wireless control unit 143 employs a method for determining when to stop and start using the ultrasound diagnostic image processing probe device 10 based on a combination of vibration change patterns detected by the acceleration sensor and pressure change patterns detected by the pressure sensor (item 9), (6B-a) the wireless control unit 143 may determine that the conditions for stopping use are met if the composite acceleration calculated by the wireless control unit 143 for vibration detection based on the sensor signals of the acceleration sensors constituting the sensor unit 15 is in a steady state and the pressure value detected by the pressure sensor is maintained at no pressure for a certain period of time or longer (for example, 1 minute or more), while (6B-b) the wireless control unit 143 may determine that the conditions for starting use are met if the composite acceleration calculated by the wireless control unit 143 for vibration detection from the sensor signals of the acceleration sensor has changed and the pressure value detected by the pressure sensor has been maintained at a threshold for a certain period of time or longer (for example, 5 seconds or more). By adopting this method, it becomes possible to detect the start and stop of use not only based on the tilt of the device but also on the vibration change pattern and the pressure change pattern. Therefore, the start and stop of use of the device can be detected with high accuracy from various perspectives, and accurate mode switching control can be achieved according to the usage situation.

[0058] The deactivation condition data and activation condition data corresponding to each of the conditions described above are pre-recorded in the memory 18, and the wireless control unit 143 determines the deactivation and activation of the ultrasound diagnostic image processing probe device 10 based on this data. The deactivation condition data and activation condition data pre-recorded in the memory 18 may consist of only one set of data corresponding to the type of sensor actually mounted as the sensor unit 15 and the detection result to be used. Alternatively, activation condition data corresponding to all types of sensors and detection results may be pre-recorded in the memory 18, and a configuration in which the sensor unit 15 is attached externally may be adopted, allowing the operator to select the deactivation condition data and activation condition data to be used according to the type of sensor attached and the type of detection result to be used.

[0059] [4] Operation of the ultrasound imaging system 1 Next, the operation of the ultrasound imaging diagnostic system 1 of this embodiment will be described. Note that the operation of the ultrasound imaging diagnostic system 1 of this embodiment differs depending on whether the wireless transceiver unit 16 of the ultrasound diagnostic image processing probe device 10 transitions from communication operation mode to communication stop mode or returns from communication stop mode to communication operation mode. Therefore, each case will be explained below using Figures 4 and 5.

[0060] [4.1] Operation of the wireless transceiver 16 when it returns from the communication stop mode to the communication operation mode First, using Figure 4, we will explain the operation when the change pattern of the sensor signal value supplied from the sensor unit 15 satisfies the activation condition while the wireless transceiver unit 16 is in communication-stopped mode, and the wireless transceiver unit 16 is returned to communication-operation mode. Figure 4 is a sequence diagram showing the operation of the ultrasound imaging diagnostic system 1 in this embodiment when the change pattern of the sensor signal value satisfies the activation condition while the wireless transceiver unit 16 of the ultrasound diagnostic image processing probe device 10 is in communication-stopped mode. Prior to this operation, it is assumed that the display application is running on the display device 20 and the wireless transceiver unit 16 is in communication-stopped mode.

[0061] First, in the ultrasound diagnostic image processing probe device 10, the sensor unit 15 detects the usage status of the device and generates a sensor signal indicating the usage status (step Sa1), which is then supplied to the control unit 14 (step Sa2).

[0062] Meanwhile, in the control unit 14, the wireless control unit 143 reads the usage start condition data recorded in the memory 18 and performs a comparison process between the usage start condition data and the sensor signal supplied from the sensor unit 15 (step Sa3). At this time, the wireless control unit 143 determines whether or not the use of the ultrasound diagnostic image processing probe device 10 has been started based on the usage start condition data corresponding to the sensor mounted on the device and the type of detection result to be used. Then, when the wireless control unit 143 detects that the change pattern of the sensor signal value satisfies the usage start condition through the comparison process (step Sa4), it outputs a control signal to the wireless transceiver unit 16 instructing it to return to the communication operation mode (step Sa5).

[0063] In this way, when a return instruction control signal is input from the wireless control unit 143, the wireless transceiver unit 16 switches to communication operation mode (step Sa6) and enters a state of waiting to receive a connection request signal (Probe request) transmitted by the display device 20 according to the display application (step Sa6). Then, when it receives a Probe request from the display device 20 (step Sa7), the wireless transceiver unit 16, in conjunction with the wireless control unit 143, compares the ESSID included in the Probe request with the ESSID in the memory 18, and if they match, sends a connection response signal (Probe response) back to the display device 20 (step Sa8), and then moves to the authentication sequence (step Sa9). In this authentication sequence, the wireless control unit 143, in conjunction with the wireless transceiver unit 16, sends an Authentication request to the display device 20 (step Sa911), and then waits for a response from the display device 20.

[0064] Meanwhile, the display device 20, after sending an Ack in response to the received Authentication request (step Sa912), sends an Authentication response (step Sa913) and waits for a response from the ultrasound diagnostic image processing probe device 10. Then, after receiving an Ack from the ultrasound diagnostic image processing probe device 10 (step Sa914) and completing the Authentication sequence (step Sa91), the wireless control unit 143, in conjunction with the wireless transceiver unit 16, sends an Association request to the display device 20 (step Sa921) in order to execute the Association sequence (step Sa92), and waits for a response from the display device 20.

[0065] Next, the display device 20 sends an Ack to the ultrasound diagnostic image processing probe device 10 (step Sa922), then sends an Association response (step Sa923), waits for a response from the ultrasound diagnostic image processing probe device 10, and when it receives an Ack from the ultrasound diagnostic image processing probe device 10 (step Sa924), the Association sequence (step Sa92) is completed, and a communication connection is established between the two devices 10 and 20 when the exchange of encryption and decryption keys between the ultrasound diagnostic image processing probe device 10 and the display device 20 is completed. The detailed processing sequence at this time is the same as that of the IEEE 80.11 communication standard.

[0066] Once a communication connection is established between the two devices 10 and 20, the wireless control unit 143 of the ultrasound diagnostic image processing probe device 10 sequentially transmits the ultrasound diagnostic image data (which may include extracted ultrasound diagnostic image frames and audio data) generated by the image processing unit 142 to the display device 20 via the wireless transceiver unit 16, storing the data in packets having a predetermined payload size (step Sa10). The display device 20 then sends back an Ack (step Sa11) each time it receives a packet from the ultrasound diagnostic image processing probe device 10, and performs display processing based on the ultrasound diagnostic image data contained in the received packet to display the ultrasound diagnostic image (step Sa12). The timing of the ultrasound diagnostic image data transmission process (step Sa10), Ack transmission / reception process (step Sa11), and display process (step Sa12) is arbitrary. For example, each time a packet is received (step Sa10) and an Ack is sent back (step Sa11), several seconds to tens of seconds worth of ultrasound diagnostic image data may be buffered on a memory (not shown) of the display device 20 and displayed, or the display processing may be performed while buffering on a frame-by-frame basis. Furthermore, if a configuration is adopted in which ultrasound diagnostic image frames captured at the timing of the operation of the screen capture button are extracted from the ultrasound diagnostic image processing probe device 10, the display device 20 may be configured to divide the display area, displaying the moving image in one display area and the extracted still image frames in the other display area, or the display may be switched between the ultrasound diagnostic image as a moving image and the extracted still image frames according to the operator's operation.Then, the processing of steps Sa10 to Sa12 is repeated until either case occurs, which is either (case a) when the communication connection between both devices 10 and 20 is released or (case b) when the power of the ultrasound diagnostic image processing probe device 10 or the display device 20 is turned OFF, and when either case occurs, the display of the ultrasound diagnostic image in the ultrasound diagnostic image system 1 is terminated.

[0067] [4.2] Operation of the wireless transceiver 16 when it transitions from communication operation mode to communication stop mode Next, using Figure 5, we will explain the operation when the change pattern of the sensor signal value supplied from the sensor unit 15 satisfies the deactivation condition while the wireless transceiver unit 16 is in communication operation mode, causing the wireless transceiver unit 16 to switch to communication deactivation mode. Figure 5 is a sequence diagram showing the operation of the ultrasound imaging diagnostic system 1 in this embodiment when the change pattern of the sensor signal value satisfies the deactivation condition while the wireless transceiver unit 16 of the ultrasound diagnostic image processing probe device 10 is in communication operation mode. Prior to this operation, it is assumed that the display application is running on the display device 20 and the wireless transceiver unit 16 is in communication operation mode.

[0068] When the wireless transceiver 16 transitions from communication operation mode to communication stop mode, the wireless control unit 143 of the ultrasound diagnostic image processing probe device 10 sequentially transmits the ultrasound diagnostic image data generated by the image processing unit 142 to the display device 20 via the wireless transceiver 16, while containing it in packets with a predetermined payload size (steps Sb1 and Sb2). The display device 20, each time it receives a packet from the ultrasound diagnostic image processing probe device 10, sends back an Ack (step Sb3) and performs display processing based on the ultrasound diagnostic image data contained in the received packet (step Sb4), thereby displaying the ultrasound diagnostic image. The operation at this time is the same as steps Sa10 to Sa12 in Figure 4 above.

[0069] In this state, the sensor unit 15 of the ultrasound diagnostic image processing probe device 10 detects the usage status of the device and generates a sensor signal indicating the usage status (step Sb5), which is then supplied to the control unit 14 (step Sb6).

[0070] Meanwhile, in the control unit 14, the wireless control unit 143 reads the deactivation condition data recorded in the memory 18 and performs a comparison process between the deactivation condition data and the sensor signal supplied from the sensor unit 15 (step Sb7). When the wireless control unit 143 detects that the change pattern of the sensor signal value satisfies the deactivation condition (step Sb8), it outputs a control signal to the wireless transceiver 16 instructing it to switch to communication stop mode (step Sb9). In this way, when the wireless control unit 143 inputs a control signal instructing it to switch to communication stop mode, the wireless transceiver 16 releases the communication connection that has been established with the display device 20, switches to communication stop mode (step Sb10), and terminates processing.

[0071] As described above, in the ultrasound imaging diagnostic system 1 of this embodiment, the ultrasound diagnostic image processing probe device 10 is equipped with a sensor unit 15 that detects the usage status of the device. When the wireless transceiver unit 16 of the ultrasound diagnostic image processing probe device 10 is in communication operation mode, if the change pattern of the sensor signal value detected by the sensor unit 15 satisfies the usage stop condition, the wireless transceiver unit 16 can be automatically switched to communication stop mode. As a result, the ultrasound diagnostic image processing probe device 10 of this embodiment can reduce the power consumption of the ultrasound diagnostic image processing probe device 10 itself, extend the diagnostic time achievable by the built-in battery without increasing the capacity of the built-in battery, and secure a long diagnostic time without compromising the convenience of the ultrasound diagnostic image processing probe device 10. Furthermore, in the ultrasound diagnostic image processing probe device 10 of this embodiment, when the change pattern of the sensor signal value satisfies the usage start condition while the wireless transceiver unit 16 is in communication stop mode, the wireless transceiver unit 16 can be automatically switched to communication operation mode without requiring any special operation from the operator, and the device can return to a state where ultrasound diagnostic image data can be transmitted, thereby further improving the convenience of the operator.

[0072] [5] Variant [5.1] Variation 1 In the above embodiment, the ultrasound diagnostic imaging system 1 is described as being composed of one ultrasound diagnostic image processing probe device 10 and one display device 20, realizing a 1:1 operation configuration. However, the ultrasound diagnostic imaging system 1 may also be composed of one display device 20 and multiple ultrasound diagnostic image processing probe devices 10, realizing a 1:N operation configuration. For example, this could be the case in which multiple ultrasound diagnostic image processing probe devices 10 with different shapes and operating frequency bands are switched according to the area to be diagnosed and operated using one display device 20.

[0073] In this case as well, the configuration of each ultrasound diagnostic image processing probe device 10 and the operation of the ultrasound diagnostic imaging system 1 are basically the same as in the above embodiment. However, when the ultrasound diagnostic imaging system 1 is configured with multiple ultrasound diagnostic image processing probe devices 10 and operated with one display device 20, if a communication connection is established with one of the ultrasound diagnostic image processing probe devices 10 and ultrasound diagnostic image data is being acquired from that ultrasound diagnostic image processing probe device 10, and the ultrasound diagnostic image processing probe device 10 switches from communication operation mode to communication stop mode and the communication connection is released, the display of the ultrasound diagnostic image will stop. For this reason, in order to continue displaying the ultrasound diagnostic image, it is necessary to re-establish a communication connection with the ultrasound diagnostic image processing probe device 10 that has returned to communication operation mode or with another ultrasound diagnostic image processing probe device 10 that is in communication operation mode, and acquire ultrasound diagnostic image data from that ultrasound diagnostic image processing probe device 10. The operation in this case is basically the same as in Figure 4.

[0074] However, if the ultrasound imaging diagnostic system 1 is configured with multiple ultrasound diagnostic image processing probe devices 10, there is a possibility that multiple ultrasound diagnostic image processing probe devices 10 constituting the ultrasound imaging diagnostic system 1 may simultaneously transition from communication stop mode to communication operation mode. In such a case, the processing performed in the ultrasound imaging diagnostic system 1 of this modified example will differ from the operation in the above embodiment (Figure 4). Therefore, the operation in the ultrasound imaging diagnostic system 1 of this modified example when multiple ultrasound diagnostic image processing probe devices 10 simultaneously transition from communication stop mode to communication operation mode will be explained below using Figure 6. Figure 6 is a sequence diagram showing the operation of the ultrasound imaging diagnostic system 1 when multiple ultrasound diagnostic image processing probe devices 10 simultaneously transition from communication stop mode to communication operation mode in the ultrasound imaging diagnostic system 1 of this modified example. Furthermore, it is assumed that prior to this operation, the display application is running on the display device 20. In addition, it is assumed that the ESSID and encryption and decryption key data corresponding to each ultrasound diagnostic image processing probe device 10 operated by the device are already stored in the memory (not shown) of the display device 20.

[0075] First, when the sensor signal change patterns of two of the multiple ultrasound diagnostic image processing probe devices 10 constituting the ultrasound diagnostic imaging system 1, namely ultrasound diagnostic image processing probe device 10-A (hereinafter also referred to as "ultrasound diagnostic image processing probe device A"), identified by "ESSID=ABC", and ultrasound diagnostic image processing probe device 10-B (hereinafter also referred to as "ultrasound diagnostic image processing probe device B"), identified by "ESSID=XYZ", simultaneously satisfy the conditions for starting use at timing t1, the two ultrasound diagnostic image processing probe devices A and B simultaneously return from communication stop mode to communication operation mode (step Sc1), and the two ultrasound diagnostic image processing probe devices A and B, having returned to communication operation mode, simultaneously enter a state of waiting to receive a probe request (step Sc2) transmitted from the display device 20.

[0076] In this state, the display device 20 attempts to establish a communication connection with the ultrasound diagnostic image processing probe device 10 that was previously connected, for example, by broadcasting a probe request containing the ESSID of the previously connected ultrasound diagnostic image processing probe device 10 (e.g., ESSID=ABC) to all ultrasound diagnostic image processing probe devices 10 in the system (step Sc2). The ESSID of the previously connected ultrasound diagnostic image processing probe device 10 may be stored in a memory (not shown) of the display device 20 along with encryption and decryption keys.

[0077] As a result, the probe request transmitted by the display device 20 will be received by all ultrasound diagnostic image processing probe devices 10 that are within the communication range, including ultrasound diagnostic image processing probe devices A and B, and are in communication operation mode. At this time, ultrasound diagnostic image processing probe device B will not respond to the probe request because its own ESSID (i.e., XYZ) does not match the ESSID (ABC) included in the probe request. It will maintain communication operation mode and later switch to communication stop mode and enter a power-saving state when the change pattern of the sensor signal value meets the conditions for stopping use. The same processing as for ultrasound diagnostic image processing probe device B will be performed for other ultrasound diagnostic image processing probe devices 10 that have ESSIDs other than "ABC".

[0078] On the other hand, since ultrasound diagnostic image processing probe device A has the same ESSID (ABC) as the ESSID included in the probe request, when it receives a probe request from the display device 20 (step Sc2), it sends a probe response back to the display device 20 (step Sc3), and then sends an Authentication request to the display device 20 (step Sc41) in order to perform an Authentication sequence with the display device 20 (step Sc4), and waits for a response from the display device 20.

[0079] In this way, upon receiving an Authentication request, the display device 20 sends back an Ack (step Sc42), then sends an Authentication response to the ultrasound diagnostic image processing probe device A (step Sc43), and waits for an Ack to be received from the ultrasound diagnostic image processing probe device A (step Sc44). The Authentication sequence (step Sc4) is completed when the Ack is received.

[0080] Furthermore, after the completion of the Authentication sequence, the ultrasound diagnostic image processing probe device A sends an Association request to the display device 20 (step Sc51) to execute the Association sequence (Sc5), and waits for a response from the display device 20.

[0081] On the other hand, when the display device 20 receives an Association request (step Sc51), it sends an Ack (acknowledgment) back to the ultrasound diagnostic image processing probe device A (step Sc52), then sends an Association response (step Sc53), waits for an Ack to be received from the ultrasound diagnostic image processing probe device A, and terminates the Association sequence (step Sc5) when an Ack is received (step Sc54).

[0082] After the above processing, data regarding encryption and decryption keys is exchanged, and once the communication connection between ultrasound diagnostic image processing probe device A, one of the multiple ultrasound diagnostic image processing probe devices 10 constituting the ultrasound diagnostic imaging system 1, which was previously connected, is re-established, ultrasound diagnostic image data is sequentially transmitted from ultrasound diagnostic image processing probe device A to the display device 20 in packets (step Sc6). Each time the display device 20 receives a packet, it sends an Ack (acknowledgment) back to ultrasound diagnostic image processing probe device A (step Sc7) and performs display processing (step Sc8). As a result, the display device 20 displays the ultrasound diagnostic image captured by ultrasound diagnostic image processing probe device A, and the operation at this time is the same as in steps Sa10 to 12 above. Then, the processing in steps Sc6 to 8 is repeated until either case a or b occurs in ultrasound diagnostic image processing probe device A, and when either case occurs, the processing in the ultrasound diagnostic imaging system 1 ends. In Figure 6, an example of processing is shown in which a communication connection is re-established with the previously connected ultrasound diagnostic image processing probe device 10 (i.e., ultrasound diagnostic image processing probe device A), and the ultrasound diagnostic image data acquired and generated by the ultrasound diagnostic image processing probe device 10 is displayed on the display device 20. However, it is also possible to configure the display device 20 to newly establish a communication connection with another ultrasound diagnostic image processing probe device 10 selected by the operator according to the diagnostic site. In this case, the display device 20 displays a list of available ultrasound diagnostic image processing probe devices 10 (i.e., a list of ultrasound diagnostic image processing probe devices 10 that constitute the ultrasound diagnostic imaging system 1), and in step Sc2, the display device 20 sends a probe request including the ESSID corresponding to the ultrasound diagnostic image processing probe device 10 selected by the operator.For example, if the operator selects ultrasound diagnostic image processing probe device B, the display device 20 sends a probe request containing "XYZ" as the ESSID in step Sc2, establishes a new communication connection with ultrasound diagnostic image processing probe device B (steps Sc3-5), and displays the ultrasound diagnostic image on the display device 20 while acquiring the ultrasound diagnostic image data generated by ultrasound diagnostic image processing probe device B (steps Sc6-8). Then, the process terminates when either case a or b occurs in the ultrasound diagnostic image processing probe device 10 (for example, ultrasound diagnostic image processing probe device B). It should be noted that the operator may also select an ultrasound diagnostic image processing probe device 10 that is in communication stop mode (in the example shown in Figure 6, an ultrasound diagnostic image processing probe device 10 other than ultrasound diagnostic image processing probe devices A and B that have already returned to communication operation mode). In this case, after the display device 20 sends the probe request (step Sc2), the display device 20 will remain in a state where it does not receive a probe response (step Sc3) for a predetermined period of time or longer. In this case, the following methods can be used to address the issue: (Method 1) After a predetermined time has elapsed, the system will assume that a communication timeout has occurred and will display a message such as, "Please operate the ultrasound diagnostic image processing probe device you are using for 10 seconds," along with voice guidance, prompting the operator to return the ultrasound diagnostic image processing probe device 10 to communication operation mode, and then resend the probe request including the ESSID of the ultrasound diagnostic image processing probe device 10 after a predetermined time has elapsed (for example, 30 seconds to 1 minute); or (Method 2) The system will display instructions to select another ultrasound diagnostic image processing probe device 10. In either case, a communication connection will be established between the ultrasound diagnostic image processing probe device 10 selected by the operator and the display device 20, making it possible to acquire and display ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device 10.

[0083] As explained above, this modified version configures an ultrasound diagnostic imaging system 1 with multiple ultrasound diagnostic image processing probe devices 10 and one display device 20. Even when multiple ultrasound diagnostic image processing probe devices 10 are operated by one display device 20, a communication connection can be appropriately established with each ultrasound diagnostic image processing probe device 10, enabling display based on ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device 10. Furthermore, even if the ultrasound diagnostic image processing probe device 10 enters a communication stop mode while displaying ultrasound diagnostic image data, a new communication connection can be established with the ultrasound diagnostic image processing probe device 10 that has returned to communication operation mode or with other ultrasound diagnostic image processing probe devices 10 that are in communication operation mode, enabling the display of ultrasound diagnostic images on the display device 20. As a result, this modified version enables ultrasound diagnostic imaging of various body parts without significantly increasing costs, such as by using multiple ultrasound diagnostic image processing probe devices 10 with different shapes and operating frequency bands depending on the area to be diagnosed, with a single display device 20. It also dramatically improves the flexibility of system configuration and enables the construction of a user-friendly system. Furthermore, since each ultrasound diagnostic image processing probe device 10 switches modes according to its usage status, a long diagnostic time can be secured without compromising convenience. In this modified configuration, if it is desired to switch from the previously connected ultrasound diagnostic image processing probe device 10 to the one being used, the display device 20 can be configured to automatically establish a communication connection with another ultrasound diagnostic image processing probe device 10 that is in communication operation mode simply by turning off the power to that ultrasound diagnostic image processing probe device 10 (stopping its use). In this case, the display device 20 can sequentially switch between ESSIDs recorded in memory, send multiple probe requests containing the ESSID, and search for an ultrasound diagnostic image processing probe device 10 that is in communication operation mode in a brute-force manner, thereby establishing a communication connection with that ultrasound diagnostic image processing probe device 10.

[0084] [4.2] Modification 2 In the above embodiment, the sensor unit 15 uses a tilt sensor, acceleration sensor, switch, pressure sensor, and combinations thereof to estimate the usage status of the ultrasound diagnostic image processing probe device 10 and to determine when to start and stop using it. However, the type of sensor used in the sensor unit 15 can also be other sensors such as a temperature sensor. Furthermore, in the above embodiment, examples of usage start and stop conditions are presented, but the specific content of each condition is arbitrary. In short, any conditions can be set as long as they allow for appropriate estimation of when to stop and start using the ultrasound diagnostic image processing probe device 10 according to the function of the sensor used. [Explanation of symbols]

[0085] 1…Ultrasound imaging diagnostic system, 10, 10-A, 10-B…Ultrasound diagnostic image processing probe device, 11…Transducer array, 111…Transmitting / receiving surface, 112…Ultrasound transducer, 12…Ultrasound drive unit, 13…Ultrasound receiver unit, 14…Control unit, 141…Signal processing unit, 142…Image processing unit, 143…Wireless control unit, 15…Sensor unit, 16…Wireless transmitting / receiving unit, 17…Operation unit, 18…Memory

Claims

1. Multiple ultrasound diagnostic image processing probe devices that transmit sound waves in a predetermined frequency band to a subject and receive echoes of said sound waves in the subject, thereby generating ultrasound diagnostic image data consisting of multiple ultrasound diagnostic image frames of the subject, A single display device that acquires the ultrasound diagnostic image data generated by the ultrasound diagnostic image processing probe device via wireless communication and displays the ultrasound diagnostic image of the subject based on the data, An ultrasound imaging diagnostic system having, The aforementioned ultrasound diagnostic image processing probe device Sound wave transmitting and receiving means that converts an input drive signal, which is an input electrical signal, into vibrations to transmit the sound wave, and receives the echo of the sound wave in a subject and outputs an electrical signal corresponding to the echo as an output signal, A driving means that inputs the aforementioned input driving signal to the sound wave transmitting / receiving means and transmits the aforementioned sound waves, Image generation means that performs predetermined signal processing on the output signal to generate the ultrasound diagnostic image data, A communication means for wirelessly transmitting the generated ultrasound diagnostic image data to the display device, A sensor that outputs a sensor signal indicating the usage status of the aircraft, (1) When a communication connection is established between the communication means and the display device, and the communication means is in a communication operation mode in which the ultrasound diagnostic image data can be transmitted to the display device, and the pattern of change in the value of the sensor signal satisfies a predetermined first condition, the communication connection with the display device is released and the communication means switches to a communication stop mode in which the wireless communication function is OFF or in a power-saving state; and (2) When the wireless communication function of the communication means is in the communication stop mode and the pattern of change in the value of the sensor signal satisfies a predetermined second condition, the control means switches the wireless communication function of the communication means to the communication operation mode, establishes a communication connection with the display device, and transmits the ultrasound diagnostic image data to the display device. Within the aforementioned ultrasound imaging diagnostic system, there is a storage means that pre-stores probe identification information for uniquely identifying the device itself, It has, The aforementioned display device An ultrasound diagnostic imaging system characterized in that, while establishing a communication connection with any of the plurality of ultrasound diagnostic image processing probe devices and acquiring and displaying the ultrasound diagnostic image data from the ultrasound diagnostic image processing probe device, if the ultrasound diagnostic image processing probe device transitions from the communication operation mode to the communication stop mode, (a) a communication request message including probe identification information corresponding to the ultrasound diagnostic image processing probe device is broadcast to all of the plurality of ultrasound diagnostic image processing probe devices, and when a response signal is received from one ultrasound diagnostic image processing probe device identified by the probe identification information included in the communication request message and which is in the communication operation mode, a communication connection is established with the ultrasound diagnostic image processing probe device, the ultrasound diagnostic image data is acquired, and after the display of the ultrasound diagnostic image based on the ultrasound diagnostic image data acquired up to the time the communication connection was released has finished, the ultrasound diagnostic image is displayed based on the ultrasound diagnostic image data acquired via the newly established communication connection.

2. The aforementioned display device If, within a predetermined time from the transmission of the communication request message, a response signal is not received from the ultrasound diagnostic image processing probe device corresponding to the probe identification information contained in the communication request message, the ultrasound diagnostic image system according to claim 1, further comprising: (1a) instructing the user to select one of the ultrasound diagnostic image processing probe devices to be used; (1b) instructing the user to perform the necessary operations to switch the ultrasound diagnostic image processing probe device to communication operation mode; and, after a predetermined time has elapsed since the instruction, resending the communication request message containing the probe identification information corresponding to the ultrasound diagnostic image processing probe device selected by the user; or (2) instructing the user to select another ultrasound diagnostic image processing probe device and resending the communication request message containing the probe identification information corresponding to the other ultrasound diagnostic image processing probe device selected by the user, thereby establishing a new communication connection with the ultrasound diagnostic image processing probe device when a response signal is received from the ultrasound diagnostic image processing probe device corresponding to the probe identification information, acquiring the ultrasound diagnostic image data, and displaying the ultrasound diagnostic image based on the acquired ultrasound diagnostic image data.

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