JP2006122586A - Capsule type ultrasonic diagnosis system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capsule type ultrasonic diagnosis system for displaying and recording a moving image by transmitting data of an echo signal from a capsule body to an ultrasounic observing device without lacking the data. <P>SOLUTION: The capsule type ultrasounic diagnosis system 1 comprises the capsule body 2 which is sent to a celom, having an ultrasounic vibrator 21 for transceiving ultrasound wave and acquiring the echo signal from a target part; and the ultrasounic observing apparatus 3 which is arranged at the outer side of a body, so as to process the echo signal which is obtained from the capsule main body 2 by wireless communication and to generate an ultrasound image. The capsule body 2 is constituted to store a prescribed amount of echo signals which are acquired by the ultrasounic vibrator 21 and to wirelessly transmit the stored echo signals to the ultrasounic observing device 3. It is more preferable that the capsule body stores the echo signals acquired by the ultrasounic vibrator 21 after making them into digital data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a capsule ultrasonic diagnostic apparatus that generates an ultrasonic image based on echo data obtained by transmitting and receiving ultrasonic waves in a living body.

  Conventionally, ultrasonic diagnostic apparatuses have been widely used. The ultrasonic diagnostic apparatus includes, for example, an ultrasonic endoscope and an ultrasonic observation apparatus. The ultrasonic endoscope has an ultrasonic transducer at the distal end of an insertion portion that can be inserted into a body cavity. The ultrasonic observation apparatus performs signal processing on an echo signal obtained from an ultrasonic transducer of the ultrasonic endoscope and displays an image on a monitor.

In the conventional ultrasonic diagnostic apparatus, the ultrasonic endoscope and the ultrasonic observation apparatus are connected by an ultrasonic cord. For this reason, in a hospital where an ultrasonic diagnostic device is installed on each bedside of the examination room, it is necessary to move the ultrasonic observation device to each bed when performing an ultrasonic examination, and it is also necessary to replace the wiring was there.
For this reason, the above-described conventional ultrasonic diagnostic apparatus wirelessly communicates an ultrasonic echo signal obtained by an ultrasonic transducer as described in, for example, Japanese Patent Application Laid-Open Nos. 2003-265468 and 2002-152314. An apparatus for transmitting data has been proposed.

The ultrasonic diagnostic apparatus described in the above-mentioned Japanese Patent Application Laid-Open No. 2003-265468 performs digital conversion processing on an echo signal obtained from an ultrasonic transducer, performs signal processing, and performs communication processing based on a general-purpose wireless communication standard such as Bluetooth. Wireless transmission to the ultrasonic observation device.
On the other hand, the ultrasonic diagnostic apparatus described in the above-mentioned Japanese Patent Application Laid-Open No. 2002-152314 amplifies an echo signal obtained from an ultrasonic transducer as an analog signal, and then performs signal processing so that erroneous detection is possible and multiplying A signal is generated and wirelessly transmitted to the ultrasonic observation apparatus.

  By the way, recently, capsule-type medical devices are being used. The capsule medical device includes a capsule body. The capsule body is formed so that the subject can easily swallow it. The capsule body is fed into the body cavity by being swallowed from the patient's mouth. The capsule body can easily reach the deep part of the body cavity, which is difficult to reach even with an endoscope having an elongated insertion part, such as the vicinity of the small intestine, and can perform medical treatment such as observation / diagnosis or treatment.

Among such conventional capsule-type medical devices, there is a capsule-type ultrasonic diagnostic device. In this capsule ultrasonic diagnostic apparatus, the ultrasonic transducer is provided in the capsule body.
Therefore, the conventional capsule-type ultrasonic diagnostic apparatus is fed into the body cavity by swallowing the capsule body from the patient's oral cavity, and at the site where the insertion part of a normal ultrasonic endoscope is difficult to insert, Images can be acquired.
JP 2003-265468 A JP 2002-152314 A

  However, the conventional capsule-type ultrasonic diagnostic apparatus has the following problems when configured to wirelessly transmit an echo signal in the same manner as the conventional ultrasonic diagnostic apparatus using the ultrasonic endoscope.

For example, the ultrasonic diagnostic apparatus described in Japanese Patent Application Laid-Open No. 2003-265468 and Japanese Patent Application Laid-Open No. 2002-152314 always transmits an ultrasonic echo signal wirelessly.
In this case, depending on the position and orientation of the capsule body or the patient's condition such as a lot of fat, the wireless communication environment is bad, the noise is bad, the transmitted data is lost, and the moving image is displayed and recorded by the ultrasonic observation apparatus. There is a possibility that necessary data is not obtained.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to transmit echo signal data from a capsule body to an ultrasound observation apparatus without omission and display and record a moving image.

  A capsule ultrasonic diagnostic apparatus according to the present invention includes a capsule main body having an ultrasonic transducer that is sent into a body cavity and receives and transmits an ultrasonic wave to obtain an echo signal from a target site. An ultrasonic observation device that generates an ultrasonic image by processing an echo signal obtained by wireless communication, and the capsule body accumulates a predetermined amount of the echo signal obtained by the ultrasonic transducer, This accumulated echo signal is wirelessly transmitted to the ultrasonic observation apparatus.

  The capsule ultrasonic diagnostic apparatus of the present invention has an effect that the echo signal data is transmitted from the capsule body to the ultrasonic observation apparatus without being lost, and a moving image can be displayed and recorded.

  An embodiment of the present invention will be described below with reference to the drawings.

  1 to 3 relate to an embodiment of the present invention, FIG. 1 is an overall configuration diagram showing a capsule ultrasonic diagnostic apparatus of the embodiment, and FIG. 2 is a block diagram showing a configuration of a capsule side signal processing unit of FIG. FIG. 3 is a flowchart showing the operation of the capsule ultrasonic diagnostic apparatus.

As shown in FIG. 1, a capsule ultrasonic diagnostic apparatus 1 of the present invention includes a capsule body 2 and an ultrasonic observation apparatus 3 provided outside the body.
The capsule body 2 is fed into a body cavity by being swallowed from the patient's mouth, and communicates with the ultrasound observation device 3 to transmit and receive ultrasound at a target site in the body cavity to obtain an ultrasound image. It is composed.

  The capsule body 2 includes an ultrasonic unit 11, a capsule side signal processing unit 12, a capsule power supply unit 13, a capsule side control unit 14, a capsule side antenna 16, and a SDRAM (Synchronous Dynamic Random Access) as a memory. Memory) 17.

  The ultrasonic unit 11 includes an ultrasonic transducer 21 that transmits ultrasonic waves and receives reflected ultrasonic echoes. The ultrasonic unit 11 is provided with a rotation drive unit 22 such as a motor for rotating the ultrasonic transducer 21. The rotation drive unit 22 includes a rotation detection unit such as an encoder (not shown), and transmits rotation information detected by the encoder to the ultrasonic observation apparatus 3. Further, although not shown, the ultrasonic unit 11 is configured so that the periphery of the ultrasonic transducer 21 is filled with an ultrasonic transmission medium such as liquid paraffin.

The capsule-side signal processing unit 12 processes an ultrasonic echo signal from the ultrasonic transducer 21 of the ultrasonic unit 11 and outputs the signal to the capsule-side control unit 14. The capsule signal processing unit 12 performs analog compression processing on the ultrasonic echo signal as will be described later.
The capsule-side signal processing unit 12 performs A / D conversion on the analog echo-processed ultrasonic echo signal and accumulates a predetermined amount in the SDRAM 17 as digital data.

The capsule-side control unit 14 outputs an ultrasonic drive signal for driving the ultrasonic transducer 21 of the ultrasonic unit 11 to drive the ultrasonic transducer 21, and sends it to the capsule-side signal processing unit 12. On the other hand, an ultrasonic echo signal from the ultrasonic transducer 21 is read out.
The capsule-side control unit 14 outputs a drive signal for driving the rotation drive unit 22 in synchronization with the transmission / reception timing of the ultrasonic transducer 21.

  As a result, the capsule body 2 is configured such that the rotation driving unit 22 rotationally drives the ultrasonic transducer 21 in a radial direction that is a direction perpendicular to the longitudinal central axis of the capsule body 2. That is, the capsule main body 2 is configured to perform radial scanning for obtaining an ultrasonic tomographic image in a direction perpendicular to the longitudinal central axis.

The in-capsule power supply unit 13 includes a battery that supplies power to each unit in the capsule body 2 via the capsule-side control unit 14.
The capsule side transmitting / receiving unit 15 modulates a signal such as echo data from the capsule side signal processing unit 12 via the capsule side control unit 14 and transmits it as a radio wave from the capsule side antenna 16. The capsule-side transceiver unit 15 demodulates the control signal from the ultrasound observation apparatus 3 received from the capsule-side antenna 16 and outputs the demodulated signal to the capsule-side signal processing unit 12 via the capsule-side control unit 14. It is like that.

On the other hand, the ultrasonic observation apparatus 3 includes a device-side antenna 31, a device-side transmission / reception unit 32, a device-side signal processing unit 33, a device-side control unit 34, an image processing unit 35, a monitor 36, and an operation input. A unit 37, an in-device power supply unit 38, and an error detection unit 39.
The device-side antenna 31 performs wireless communication with the capsule body 2.

The device-side transmitting / receiving unit 32 selectively extracts a carrier wave of a radio wave (carrier signal) received from the capsule-side body 2 received by the device-side antenna 31, demodulates a signal such as echo data by performing detection, etc. Output to the device-side signal processing unit 33.
The device-side transmitting / receiving unit 32 modulates a control signal output from the error detection unit 39 and transmits the modulated control signal from the device-side antenna 31.

  The image processing unit 35 performs image signal processing on echo data input via the device-side control unit 34 to generate a standard video signal. The image processing unit 35 outputs the generated video signal to the monitor 36 and displays the ultrasonic image from the capsule body 2 on the display screen of the monitor 36.

  The device-side control unit 34 is connected to an operation input unit 37 such as a keyboard or a mouse. Based on the operation information input from the operation input unit 37, the device-side control unit 34 controls the image processing unit 35 to make an operator's request. Such image signal processing is performed. The apparatus-side control unit 34 performs decompression processing on the compressed echo data.

The in-device power supply unit 38 is configured to supply power supply power from a commercial power source to the respective components through the device-side control unit 34. The in-device power supply unit 38 may include a battery (not shown).
The error detection unit 39 checks the error occurrence rate with respect to the echo data from the capsule body 2 demodulated by the device-side transmission / reception unit 32, and the capsule body 2 of the capsule body 2 according to the checked error occurrence rate. A control signal for setting the amount of echo data stored in the SDRAM 17 is output. The details of this control will be described later with reference to the flowchart shown in FIG.

Next, the configuration of the capsule signal processing unit 12 will be described with reference to FIG.
As shown in FIG. 2, the capsule-side signal processing unit 12 includes an amplifier 51, a filter 52, a compression processing unit 53, a CPU 54, and a memory interface (I / F) 55.

The amplifier 51 amplifies an ultrasonic echo signal from the ultrasonic transducer 21 of the ultrasonic unit 11.
The filter 52 is formed by a BPF (Band-Pass Filter) that allows only necessary signals to pass therethrough. The filter 52 extracts a frequency component necessary for generating an ultrasonic image by removing high-band and low-band signals from the ultrasonic echo signal amplified by the amplifier 51. Yes.

  The compression processing unit 53 performs analog compression processing on the signal extracted by the filter 52. In this embodiment, logarithmic compression processing is performed as analog compression processing. As a result, the compression processing unit 53 can perform analog compression processing without being missed by logarithmically compressing an ultrasonic echo signal including a very weak signal.

The CPU 54 has an A / D function for A / D converting the echo signal compressed by the compression processing unit 53.
The CPU 54 writes and stores a predetermined amount of digital data A / D converted via the memory I / F 55 in the SDRAM 17.

  The CPU 54 is configured to set the amount of echo data stored in the SDRAM 17 based on a control signal from the error detection unit 39 of the ultrasonic observation apparatus 3. Further, when the accumulated echo data reaches a set value, the CPU 54 outputs the accumulated echo data to the capsule transmission / reception unit 15 via the capsule control unit 14.

In the capsule ultrasonic diagnostic apparatus 1 configured as described above, the subject is swallowed by the subject and the ultrasonic observation is performed.
The capsule ultrasonic diagnostic apparatus 1 starts ultrasonic observation when the capsule body 2 places the power source 13 in the capsule in a power supply state in the body cavity.

The capsule ultrasonic diagnostic apparatus 1 operates as shown in the flowchart of FIG.
The capsule body 2 outputs an ultrasonic drive signal from the capsule-side control unit 14 to drive the ultrasonic transducer 21 and transmits / receives an ultrasonic pulse to / from a target site.

At the same time, the capsule body 2 outputs a drive signal from the capsule side control unit 14 and the rotation drive unit 22 of the ultrasonic unit 11 is driven to rotate the ultrasonic transducer 21.
As a result, in the capsule body 2, the ultrasonic transducer 21 transmits and receives ultrasonic pulses to perform radial scanning, and acquires an ultrasonic echo signal from the living tissue (step S1).

The capsule body 2 performs signal processing on the acquired ultrasonic echo signal in the capsule signal processing unit 12 (step S2).
The capsule signal processing unit 12 amplifies the ultrasonic echo signal by the amplifier 51, removes a high-band frequency signal by the filter 52, and performs logarithmic compression processing by the compression processing unit 53. Thereby, the capsule main body 2 can perform analog compression processing without missing by compressing the ultrasonic echo signal including a very weak signal logarithmically.

Further, the capsule side signal processing unit 12 A / D converts the ultrasonic echo signal subjected to the analog compression processing, and accumulates a predetermined amount in the SDRAM 17 as digital data. At this time, the SDRAM 17 stores a predetermined amount of echo data based on a preset initial value.
When the accumulated echo data reaches the initial value, the capsule signal processor 12 outputs the capsule data to the capsule transceiver 15 via the capsule controller 14.

The capsule-side transmitting / receiving unit 15 modulates echo data from the capsule-side signal processing unit 12 and transmits it as radio waves by the capsule-side antenna 16.
The ultrasonic observation apparatus 3 receives radio waves from the capsule body 2 from the apparatus-side antenna 31 and performs reception processing by the apparatus-side transmission / reception unit 32.

The device-side transmitting / receiving unit 32 efficiently amplifies a target frequency band from the signal received from the device-side antenna 31 to extract a carrier wave (carrier signal), and the extracted carrier wave (carrier signal) A target signal band is extracted, the extracted signal is detected and the carrier wave (carrier signal) is removed, and a signal such as an image signal is demodulated.
The demodulated echo data is checked by the error detector 39.

The error detection unit 39 checks the error occurrence rate with respect to the signal from the capsule body 2 demodulated by the device side transmission / reception unit 32, and the SDRAM 17 of the capsule body 2 according to the checked error occurrence rate. Sets the amount of echo data to be stored in.
The error detection unit 39 determines how much the current data transfer error is as an error occurrence rate.

Here, the error detector 39 determines whether the current data transfer error is within 3% or a preset initial value (step S3).
If the current data transfer error is within 3% or the preset initial value, the error detection unit 39 sets the area designation of the SDRAM 17 as 5% as the echo data accumulation amount (step S4).

The error detection unit 39 outputs a control signal corresponding to the set area designation 5% of the SDRAM 17 to the device-side transmission / reception unit 32.
The device-side transmitting / receiving unit 32 modulates the control signal output from the error detecting unit 39 and transmits it from the device-side antenna 31.

The capsule body 2 receives radio waves from the ultrasonic observation apparatus 3 by the capsule antenna 16 (step S5).
The capsule side transmission / reception unit 15 of the capsule body 2 demodulates the control signal from the ultrasonic observation device 3 received from the capsule side antenna 16 and the capsule side signal processing unit 12 via the capsule side control unit 14. Output to.

The capsule-side signal processing unit 12 writes and accumulates echo data in an area 5% of the SDRAM 17 based on a control signal from the ultrasonic observation device 3.
The capsule-side signal processing unit 12 outputs the accumulated echo data to the capsule-side transmission / reception unit 15 via the capsule-side control unit 14 when the accumulated echo data reaches the 5% area of the SDRAM 17. .

The capsule-side transmitting / receiving unit 15 modulates echo data from the capsule-side signal processing unit 12 and transmits it as radio waves by the capsule-side antenna 16.
The ultrasonic observation apparatus 3 receives radio waves from the capsule main body 2 from the apparatus-side antenna 31, receives and processes them by the apparatus-side transmission / reception unit 32, and demodulates them.
The signal from the device side transmitting / receiving unit 32 is processed by the device side signal processing unit 33.

The device-side signal processing unit 33 converts a demodulated serial signal such as echo data into a parallel signal and outputs the parallel signal to the device-side control unit 34.
The device-side control unit 34 performs analog expansion processing on the signal processed by the device-side signal processing unit 33 and outputs the signal to the image processing unit 35. Further, the apparatus-side control unit 34 controls the image processing unit 35 based on the operation information input from the operation input unit 37 to perform image processing as desired by the operator.

The image processing unit 35 performs image signal processing on a signal input via the device-side control unit 34 (step S6), outputs the generated video signal to the monitor 36, and displays the capsule body 2 on the display screen. Is displayed (step S7).
Here, since the echo data is sequentially transmitted from the capsule body 2 to the ultrasonic observation apparatus 3 when it is accumulated in the area 5% of the SDRAM 17 as described above, a real-time moving image is transmitted.

On the other hand, if the current data transfer error is within 3% or not a preset initial value, the error detection unit 39 determines whether the current data transfer error is within 30% (step S8).
If the current data transfer error is within 30%, the error detection unit 39 sets the area designation of the SDRAM 17 as 35% as the accumulated amount of echo data (step S9).

The error detection unit 39 outputs a control signal corresponding to the set area designation 35% of the SDRAM 17 to the device-side transmission / reception unit 32.
The device-side transmitting / receiving unit 32 modulates the control signal output from the error detecting unit 39 and transmits it from the device-side antenna 31.

The capsule body 2 receives radio waves from the ultrasonic observation device 3 by the capsule antenna 16 (step S10).
The capsule side transmission / reception unit 15 of the capsule body 2 demodulates the control signal from the ultrasonic observation device 3 received from the capsule side antenna 16 and the capsule side signal processing unit 12 via the capsule side control unit 14. Output to.

The capsule-side signal processing unit 12 writes and accumulates echo data in an area 35% of the SDRAM 17 based on a control signal from the ultrasonic observation apparatus 3.
The capsule side signal processing unit 12 outputs the accumulated echo data to the capsule side transmitting / receiving unit 15 via the capsule side control unit 14 when the accumulated echo data reaches the area 35% of the SDRAM 17. .

The capsule-side transmitting / receiving unit 15 modulates echo data from the capsule-side signal processing unit 12 and transmits it as radio waves by the capsule-side antenna 16.
The ultrasonic observation apparatus 3 receives radio waves from the capsule main body 2 from the apparatus-side antenna 31, receives and processes them by the apparatus-side transmission / reception unit 32, and demodulates them.
The signal from the device side transmitting / receiving unit 32 is processed by the device side signal processing unit 33.

The device-side signal processing unit 33 converts a demodulated serial signal such as echo data into a parallel signal and outputs the parallel signal to the device-side control unit 34.
The device-side control unit 34 performs analog expansion processing on the signal processed by the device-side signal processing unit 33 and outputs the signal to the image processing unit 35. Further, the apparatus-side control unit 34 controls the image processing unit 35 based on the operation information input from the operation input unit 37 to perform image processing as desired by the operator.

The image processing unit 35 performs image signal processing on a signal input via the device-side control unit 34 (step S11), outputs the generated video signal to the monitor 36, and displays the capsule body on the display screen. 2 is displayed (step S7).
Here, since the echo data is sequentially transmitted from the capsule body 2 to the ultrasonic observation device 3 when accumulated in the 35% area of the SDRAM 17 as described above, the transmitted moving image is delayed. become.

On the other hand, if the current data transfer error is not within 30%, the error detection unit 39 sets the area designation of the SDRAM 17 as 100% as the accumulated amount of echo data (step S12).
The error detection unit 39 outputs a control signal corresponding to the set region designation 100% of the SDRAM 17 to the device-side transmission / reception unit 32.

The device-side transmitting / receiving unit 32 modulates the control signal output from the error detecting unit 39 and transmits it from the device-side antenna 31.
The capsule body 2 receives radio waves from the ultrasonic observation device 3 by the capsule antenna 16 (step S13).

The capsule side transmission / reception unit 15 of the capsule body 2 demodulates the control signal from the ultrasonic observation device 3 received from the capsule side antenna 16 and the capsule side signal processing unit 12 via the capsule side control unit 14. Output to.
The capsule-side signal processing unit 12 writes and accumulates echo data in the region 100% of the SDRAM 17 based on a control signal from the ultrasonic observation apparatus 3.

The capsule-side signal processing unit 12 outputs the accumulated echo data to the capsule-side transmission / reception unit 15 via the capsule-side control unit 14 when the accumulated echo data reaches the area 100% of the SDRAM 17. .
The capsule-side transmitting / receiving unit 15 modulates echo data from the capsule-side signal processing unit 12 and transmits it as radio waves by the capsule-side antenna 16.

The ultrasonic observation apparatus 3 receives radio waves from the capsule main body 2 from the apparatus-side antenna 31, receives and processes them by the apparatus-side transmission / reception unit 32, and demodulates them.
The signal from the device side transmitting / receiving unit 32 is processed by the device side signal processing unit 33.

The device-side signal processing unit 33 converts a demodulated serial signal such as echo data into a parallel signal and outputs the parallel signal to the device-side control unit 34.
The device-side control unit 34 performs analog expansion processing on the signal processed by the device-side signal processing unit 33 and outputs the signal to the image processing unit 35. Further, the apparatus-side control unit 34 controls the image processing unit 35 based on the operation information input from the operation input unit 37 to perform image processing as desired by the operator.

The image processing unit 35 performs image signal processing on a signal input via the device-side control unit 34 (step S14), outputs the generated video signal to the monitor 36, and displays the capsule body on the display screen. 2 is displayed (step S7).
Here, since the echo data is sequentially transmitted from the capsule body 2 to the ultrasonic observation device 3 when it is accumulated in the area 100% of the SDRAM 17 as described above, the moving image data recorded for a predetermined period of time is stored. It is displayed on the monitor 36.

As a result, the capsule ultrasonic diagnostic apparatus 1 of the present embodiment can set the amount of echo data accumulated in the memory (SDRAM 17) in accordance with the error occurrence rate (data transfer error).
Accordingly, the capsule ultrasonic diagnostic apparatus 1 according to the present embodiment reduces the accumulated amount of echo data and transmits the echo data in real time to display the ultrasonic image when the wireless communication environment is good. When the condition is poor, it is possible to display the ultrasonic image by transmitting the echo data recorded for a predetermined period by increasing the accumulated amount of the echo data.
Thereby, the capsule ultrasonic diagnostic apparatus 1 of the present embodiment can accurately transmit the echo signal from the capsule body.

  The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

  The capsule ultrasonic diagnostic apparatus of the present invention is suitable for displaying and recording moving images by transmitting echo signal data from the capsule body to the ultrasonic observation apparatus without loss.

1 is an overall configuration diagram illustrating a capsule ultrasonic diagnostic apparatus according to an embodiment. It is a block diagram which shows the structure of the capsule side signal processing part of FIG. It is a flowchart which shows operation | movement of a capsule type ultrasonic diagnostic apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Capsule type ultrasonic diagnostic apparatus 2 Capsule body 3 Ultrasound observation apparatus 11 Ultrasound part 12 Capsule side signal processing part 14 Capsule side control part 15 Capsule side transmission / reception part 16 Capsule side antenna 17 SDRAM
DESCRIPTION OF SYMBOLS 21 Ultrasonic transducer 22 Rotation drive part 31 Apparatus side antenna 32 Apparatus side transmission / reception part 33 Apparatus side signal processing part 34 Apparatus side control part 35 Image processing part 36 Monitor 37 Operation input part 39 Error detection part Attorney Susumu Ito

Claims (3)

A capsule body having an ultrasonic transducer that is sent into a body cavity and receives and transmits an ultrasonic wave to obtain an echo signal from a target site;
An ultrasonic observation device that is provided outside the body and generates an ultrasonic image by performing signal processing on an echo signal obtained by wireless communication from the capsule body;
Comprising
The capsule main body stores a predetermined amount of echo signals obtained by the ultrasonic transducer and wirelessly transmits the stored echo signals to the ultrasonic observation apparatus.   2. The capsule ultrasonic diagnostic apparatus according to claim 1, wherein the capsule body stores the echo signal obtained by the ultrasonic transducer as digital data. The ultrasonic observation device checks an error occurrence rate with respect to an echo signal transmitted from the capsule body, and sets an accumulation amount of echo data to be accumulated in the capsule body according to the checked error occurrence rate. ,
The capsule body transmits the accumulated echo signal to the ultrasonic observation device when the echo signal reaches a set value according to the accumulation amount of the echo signal obtained by communicating with the ultrasonic observation device. The capsule ultrasonic diagnostic apparatus according to claim 1, wherein the capsule ultrasonic diagnostic apparatus is characterized.

Images