JP2007068567A - Portable easy image display device and receiving system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To sensuously recognize the situation of the receiving intensity of radio signals transmitted from a subject introducing device both before and during examination. <P>SOLUTION: A viewer 7 comprises a detection means for detecting the receiving intensity of radio signals transmitted from a capsule type endoscope 2 and an announcing means for announcing the situation of the detected receiving intensity in a display pattern such as a capsule picture display 41 via a display part 11. Accordingly, the situation of the receiving intensity of the radio signals transmitted/output from the capsule type endoscope 2 can be sensuously recognized based on the result of the announcement of the situation of the receiving intensity, and auxiliary observation can be performed under an excellent received image by searching positions where the receiving intensity is strong during the examination for helping efficient examination. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention integrally has an antenna for receiving a radio signal transmitted from an intra-subject introduction apparatus such as a capsule endoscope introduced into a subject, and displays an image based on the received radio signal on a display unit. The present invention relates to a portable simple image display device for display and a receiving system including the portable simple image display device.

  In recent years, in the field of endoscopes, capsule endoscopes equipped with an imaging function and a wireless communication function have appeared. This capsule endoscope is an observation period, for example, the esophagus, after it is swallowed from the subject's mouth for observation (examination) until it is naturally discharged from the subject's living body (human body). In addition, the inside (inside the body cavity) of an organ such as the stomach and the small intestine is moved along with its peristaltic movement, and images are sequentially captured at a predetermined imaging rate using an imaging function.

  In addition, during this observation period of moving through these organs, image data captured in the body cavity by the capsule endoscope is sequentially transmitted to the outside of the subject by a wireless communication function such as wireless communication, and is received externally. It is stored in a memory provided in the machine. When the subject carries the receiver with the wireless communication function and the memory function, the subject can swallow the capsule endoscope, and even during the observation period until it is discharged, It is possible to act freely without suffering freedom (see Patent Document 1).

  When receiving image data, the receiver generally distributes a plurality of antennas for receiving image signals transmitted from the capsule endoscope to the outside of the subject, and receives one signal having a strong reception strength. The antenna is selected and switched to receive an image signal. For example, in Patent Document 1, reception switching of a plurality of antennas arranged outside a subject is performed, and a capsule type inside a subject which is an image signal transmission source based on the electric field strength received by each antenna. A receiver for detecting the position of the endoscope is described.

  In such a capsule endoscope system, after a series of imaging operations by the capsule endoscope is completed, the image data stored in the memory of the receiver is transferred to a workstation or the like so that the image can be viewed afterwards. It is common to do this automatically. However, doctors etc. are highly demanded to view captured images in real time with respect to esophagus, stomach, etc. that can be diagnosed immediately because they pass in a short time, from capsule endoscopes. There has also been proposed a system with a simple image display device that displays an image in real time based on a transmitted wireless signal.

  The conventional simple image display device has, as its simplest configuration, a configuration that can be electrically connected to a receiver, and includes a small display unit and a predetermined signal processing unit. By having such a configuration, the simple image display device can input a signal that has been subjected to reception processing by the receiver, and can perform small processing after performing predetermined processing based on the input signal. An image captured by the capsule endoscope is displayed on the display unit.

Japanese Patent Laid-Open No. 2003-19111

  By the way, in the capsule endoscope, when the body cavity existing at the time of observation of the capsule endoscope is an organ with a lot of blood, the body surface on which the capsule endoscope and the receiver antenna are arranged It is known that radio waves from the capsule endoscope are not easily transmitted to the body surface side when blood flow exists between them. However, since several antennas for the receiver are discretely and fixedly arranged at several places on the body surface of the subject, even if the antenna having the strongest reception strength is selected, the capsule type endoscope Depending on the position of the mirror, there is a possibility that a portion with low reception intensity may occur.

  Therefore, in order to avoid receiving the radio wave from the capsule endoscope and avoid receiving the antenna at a location where the reception intensity is high, the simple image display device can be of a size that can be held by the operator. It is designed to be portable and equipped with an integrated antenna, and the simplified image display device itself can receive the wireless signal from the capsule endoscope and display the image while changing the position of the antenna. It is also considered to consult the doctor.

  However, when the simple image display device is configured to be portable enough to be held by the operator, the size of the display unit configured by the LCD or the like is larger than the size of the display unit in the workstation or the like. It will be quite small. Even if the position of the simple image display device is changed while viewing the display image of such a small display unit, it is difficult to determine whether the currently displayed image is an image in a situation where the reception intensity is strong, Real-time observation in a strong situation cannot be guaranteed.

  In addition, depending on the capsule endoscope, there may be an abnormal condition in which the output state of the wireless signal transmitted by the capsule endoscope itself is poor and the reception intensity on the receiver side is originally weak. In such cases, no effective countermeasures have been taken in order to eliminate capsule endoscopes that have such abnormalities before examination (before swallowing) and cannot be used for good examination.

  The present invention has been made in view of the above, and it is possible to sensuously know the state of the reception intensity of a radio signal transmitted and output from the in-subject introduction apparatus both before and during the examination. An object of the present invention is to provide a portable simple image display device and a receiving system that can be used to assist in good inspection.

  In order to solve the above-described problems and achieve the object, a portable simple image display device according to claim 1 includes an antenna that receives a radio signal transmitted from an in-subject introduction device introduced into the subject. A portable simple image display device that displays on the display unit an image based on a wireless signal received integrally and having a detection means for detecting the reception intensity of the wireless signal transmitted from the in-subject introduction device; And an informing means for informing the detected reception intensity status.

  The portable simple image display device according to a second aspect of the present invention is characterized in that, in the above invention, the notification means notifies the reception intensity state by visually changing the reception intensity state according to the detected reception intensity.

  In the portable simple image display device according to claim 3, in the above-mentioned invention, the notification means uses a part of the display unit, and the reception intensity state is a predetermined display pattern that changes according to the detected reception intensity. It is characterized by notifying.

  In the portable simple image display device according to claim 4, in the above invention, the notification means uses a light emitting element to notify the reception intensity status with a predetermined lighting display pattern that changes according to the detected reception intensity. It is characterized by.

  The portable simple image display device according to a fifth aspect of the present invention is characterized in that, in the above-described invention, the notification means notifies the reception intensity state by aurally changing according to the detected reception intensity.

  According to a sixth aspect of the present invention, there is provided a portable simple image display device including the built-in memory for storing the image data based on the received radio signal.

  According to a seventh aspect of the present invention, there is provided a receiving system that receives a radio signal transmitted from an in-subject introduction apparatus that is carried by a subject and introduced into the subject by an arrangement antenna for the subject and receives the received radio signal. A receiving device that stores image data based on a storage unit, and a portable simple image display device that is detachably connected to the receiving device and displays an image based on a radio signal received by the receiving device on a display unit The portable simple image display device includes an integrated antenna that receives a radio signal transmitted from the in-subject introduction device, and an image based on the radio signal received by the antenna. Image display means to be displayed on the display, detection means for detecting the reception intensity of the radio signal transmitted from the intra-subject introduction apparatus and received by the antenna, and the detected reception intensity status are reported. And informing means for, characterized by comprising a.

  The receiving system according to an eighth aspect of the present invention is characterized in that, in the above-mentioned invention, the notification means performs notification by changing a reception intensity state visually according to the detected reception intensity.

  According to a ninth aspect of the present invention, in the above invention, the notification means uses a part of the display unit to notify the reception intensity status with a predetermined display pattern that changes according to the detected reception intensity. Features.

  The receiving system according to claim 10 is characterized in that, in the above invention, the notification means uses a light emitting element to notify the reception intensity status with a predetermined lighting display pattern that changes according to the detected reception intensity. .

  The reception system according to claim 11 is characterized in that, in the above-mentioned invention, the notification means notifies the reception intensity state by aurally changing in accordance with the detected reception intensity.

  According to a twelfth aspect of the present invention, in the above invention, the portable simple image display device includes a built-in memory for storing image data based on the received radio signal.

  According to the portable simple image display device and the reception system according to the present invention, the portable simple image display device detects the reception intensity of the radio signal transmitted from the intra-subject introduction device, and the detected reception. And an informing means for informing the intensity status, so that the reception intensity status of the radio signal transmitted and output from the intra-subject introduction apparatus is sensibly based on the notification result of the received intensity status in both cases before and during the examination. If it is before the test, swallowing the abnormally introduced device in the subject whose reception intensity is originally weak can be avoided in advance. An auxiliary observation can be performed under the received image, and it is possible to help a good inspection.

  Embodiments of a portable simple image display device and a receiving system according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments, and various modified embodiments are possible without departing from the spirit of the present invention.

  FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system which is a preferred embodiment of a portable simple image display device and a receiving system according to the present invention, and FIG. It is a disassembled perspective view which shows the structural example of a receiving system. This wireless intra-subject information acquisition system uses a capsule endoscope as an example of an intra-subject introduction device that is a transmission device. In FIG. 1, the wireless in-vivo information acquiring system includes a receiving system 3 used for receiving a wireless signal transmitted from a capsule endoscope 2 introduced into the subject 1. The receiving system 3 is used while being carried by the subject 1 and receives a radio signal received through the antennas 4a to 4h. A receiving cable 5 is connected to the receiving device 5. 6 and a viewer 7 serving as a portable simple image display device that displays an image captured by the capsule endoscope 2 based on an electric signal output from the receiving device 5.

  In addition, the wireless in-vivo information acquiring system according to the present embodiment includes a workstation (WS) 8 that displays an in-vivo image based on a video signal received by the receiving system 3, a receiving device 5, and the workstation 8. A portable recording medium 9 as a storage unit for transferring data between them, and a detachable communication cable 10 for transmitting data from the viewer 7 to the workstation 8.

  The capsule endoscope 2 is introduced into the subject 2 through the oral cavity of the subject 1, and has a function of wirelessly transmitting, for example, in-vivo image data acquired by a built-in imaging mechanism to the outside of the subject 1. Have. The arrangement antennas 4a to 4h are fixedly arranged at appropriate positions on the external surface of the subject 1, and these arrangement antennas 4a to 4h can be worn by the subject 1, for example. The subject 1 may be mounted on the receiving jacket, and the subject 1 may wear the receiving jacket to mount the arranged antennas 4a to 4h. In this case, the arrangement antennas 4a to 4h may be detachable from the jacket.

  The workstation 8 is for displaying an in-vivo image taken by the capsule endoscope 2 and displays an image based on data obtained by the portable recording medium 9 or the like. Specifically, the workstation 8 may be configured to directly display an image by a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.

  The portable recording medium 9 uses a compact flash (registered trademark) memory or the like, and is detachable from the receiving device 5 and the workstation 8. When the portable recording medium 9 is inserted into the portable recording medium 9, information is output or recorded. It has a possible structure. In the present embodiment, the portable recording medium 9 is inserted into the display device of the workstation 8 to store identification information such as an inspection ID before the inspection, for example, and the receiving device 5 immediately before the inspection. The identification information is read out by the receiving device 5 and registered in the receiving device 5. Further, while the capsule endoscope 2 is moving in the body cavity of the subject 1, the portable recording medium 9 is inserted into the receiving device 5 attached to the subject 1 to be inserted into the capsule endoscope. Record the data sent from 2. Then, after the capsule endoscope 2 is ejected from the subject 1, that is, after the imaging of the inside of the subject 1 is completed, the capsule endoscope 2 is taken out from the receiving device 5 and inserted into the workstation 8, The station 8 has a configuration in which data recorded on the portable recording medium 9 is read out. For example, by passing data between the receiving device 5 and the workstation 8 using the portable recording medium 9, the subject 1 can freely operate during imaging in the body cavity. This also contributes to shortening the data transfer period between the two. Note that data is transferred between the receiving device 5 and the workstation 8 by using another recording device built in the receiving device 5, for example, a hard disk. May be configured to be wired or wirelessly connected.

  The viewer 7 is a portable type formed to a size that can be grasped by an operator with a hand, and has a function of displaying an image based on an electric signal output from the receiving device 5. In order to realize such a function, the viewer 7 includes a display unit 11 using a small LCD for image display. Reference numeral 12 denotes a power switch, and reference numeral 13 denotes a pilot lamp that is lit when the apparatus is in operation. In addition, the viewer 7 integrally has a rod-shaped antenna 14 for realizing a receiving function for directly receiving a radio signal transmitted from the capsule endoscope 2 without going through the receiving device 5. . In FIG. 1, the receiving device 5 and the viewer 7 are connected by the viewer cable 6, but they are not always used in a connected state, and real-time observation is not performed on the received image of the receiving device 5. In the state, the viewer cable 6 is disconnected, and the subject 1 carries only the receiving device 5.

  Next, details of the configuration of the receiving device 5 and the viewer 7 will be described. FIG. 3 is a schematic block diagram showing a configuration example of the receiving device 5 and the viewer 7 constituting the receiving system 3 according to the present embodiment. The receiving device 5 includes an intensity detecting unit 21 that detects the received intensity based on the received intensity signals from the antennas 4a to 4h, and an A / D converting unit 22 that performs A / D conversion on the detection result of the received intensity. And an antenna switching unit 23 that selects one of the arranged antennas 4a to 4h having the highest reception intensity based on the detection result of the reception intensity after A / D conversion. In addition, the receiving device 5 includes a demodulator 24 that performs demodulation processing on a radio signal received via one antenna selected by the antenna switching unit 23, and a predetermined electric signal that has been subjected to demodulation processing. And an image processing circuit 25 for performing the image processing. In addition, a control unit 26 having a microcomputer configuration including a CPU that controls the entire receiving device 5 is provided. The control unit 26 includes the A / D conversion unit 22, the antenna switching unit 23, and the image processing circuit 25 described above. In addition, a power switch 27, a small display unit 28, and a portable recording medium 9 are connected. Furthermore, it has a cable connector 29 branched from the output side of the demodulator 24 and connected to the viewer cable 6. Although not particularly illustrated, a battery for driving each unit is provided by built-in or external connection.

  The viewer 7 includes an intensity detection unit 31 configured by a sample hold circuit or the like to detect the reception intensity based on the reception intensity signal from the antenna 14, and A / D conversion for A / D converting the detection result of the reception intensity. And a control unit 33 that evaluates the detection result of the reception intensity after A / D conversion. The viewer 7 also includes a demodulator 34 that demodulates a radio signal received via the antenna 14, and an image processing circuit 35 that performs predetermined image processing on the demodulated electric signal. Is provided. In addition to the A / D conversion unit 32 and the image processing circuit 35, the control unit 33 having a microcomputer having a CPU and the like for controlling the entire viewer 7 includes a power switch 12, a display unit 11, and a built-in memory 36. It is connected. Further, a changeover switch 38 for selectively switching the output side of the demodulator 24 and the cable connector 37 side to which the viewer cable 6 is connected is provided for the image processing circuit 35, and the changeover control of the changeover switch 38 is performed. A receiver connection detector 39 is provided. The control unit 33 is connected to a communication output unit 40 for outputting data to the workstation 8 via the communication cable 10. Although not particularly shown, a battery for driving each unit is incorporated.

  Here, the viewer 7 according to the present embodiment has a predetermined display in which a part of the display unit 11 is used as a notification unit under the control of the control unit 33 and the reception intensity status changes according to the detected reception intensity. It is configured to notify the operator with a pattern. For example, when the reception intensity is divided into four levels between weak and strong, as shown in FIG. 4, the reception intensity is displayed by switching the pattern of the capsule picture display 41 using a part of the display unit 11. FIG. 4A shows the case where the reception intensity is 0, and the capsule picture display 41 is set to red display (hatching display on the drawing) indicating a warning, and thereafter, in FIGS. 4B to 4D. As shown in the figure, the pattern is a stepwise and visual display of how the reception intensity increases by increasing the number of schematic radio lines one by one as the reception intensity increases.

  Next, the basic operation of the wireless in-vivo information acquiring system according to the present embodiment will be described. The capsule endoscope 2 introduced into the subject 1 with the built-in power switch turned on captures the inside of the body cavity at predetermined intervals while sequentially moving inside the body cavity, and uses the captured image data as a radio signal outside the body. Output to send. Here, a plurality of antennas 4 a to 4 h are arranged on the body surface side of the subject 1, and the antenna having the strongest reception strength with respect to the radio signal transmitted and output from the capsule endoscope 2. The received signal received is demodulated by the demodulator 24, and the image data subjected to predetermined image processing by the image processing circuit 25 is sequentially stored in the portable recording medium 9. At this time, if the viewer 7 is connected by the viewer cable 6, the changeover switch 38 is switched to the viewer connector 37 side, and the body cavity image data received by the receiving device 5 is transmitted in real time through the display unit 11 of the viewer 7. Since it is displayed, real-time observation is possible. Thereafter, the capsule endoscope 2 is discharged out of the subject 1 and when the inspection is completed, the portable recording medium 9 is taken out from the receiving device 5 and inserted into the workstation 8 side, whereby the portable recording medium 9 is removed. By displaying the in-vivo image data recorded on the large-sized display screen of the workstation 8, a doctor or the like can make a detailed diagnosis.

  Next, the operation of the viewer 7 according to the present embodiment will be described. The viewer 7 of the present embodiment has an antenna 14 integrally, and can directly receive a radio signal transmitted and output from the capsule endoscope 2 without going through the receiving device 5. And the reception intensity | strength is detected and notification of the reception intensity | strength condition is enabled by the predetermined display pattern using a part of display part 11. FIG.

  Therefore, for example, before the examination, as shown in FIG. 5, a doctor or a nurse holds the viewer 7 in a single state, closes to the capsule endoscope 2 before the swallowing after turning on the power switch, and the antenna 14. By directly receiving the radio signal from the capsule endoscope 2 through the detected signal, the reception intensity is detected, and the detected reception intensity state is displayed on the display unit 11 of the viewer 7 as the capsule picture display 41. The reception intensity status for the capsule endoscope 2 can be sensuously known through vision. At this time, for example, when the capsule picture display 41 as shown in FIG. 4A is obtained, the capsule picture display 41 as shown in FIG. 4B or FIG. 4C is used. In the case of an abnormal capsule endoscope 2 whose transmission output intensity is weak and reception intensity is originally weak, since the inspection cannot be performed well, swallowing can be avoided in advance, and reception It can be changed to a normal capsule endoscope 2 having a high strength, which can help a good examination.

  Further, after the start of the examination, for example, when the capsule endoscope 2 passes through the esophagus or the stomach, as shown in FIG. 6, the doctor holds the viewer 7 in a single state as necessary. By closely receiving the radio signal from the capsule endoscope 2 through the antenna 14 close to the subject 1 and in parallel with the antennas 4a to 4h, the in-vivo image data without passing through the receiving device 5 is directly received. Can be acquired and displayed as a capsule acquisition image 42 on the display unit 11 of the viewer 7. At this time, the reception intensity of the radio signal from the capsule endoscope 2 is detected by the control unit 33 through the intensity detection unit 31 and the A / D conversion unit 32, and the detected reception intensity status is displayed on the display unit 11. Since a portion of the capsule picture display 41 is also displayed in part, the received intensity level at the position of the antenna 14 can be sensed visually. Therefore, by changing the position of the viewer 7 and moving the position of the antenna 14, for example, by searching for a position where the strongest reception intensity can be obtained as shown in FIG. Can be received in the best condition not affected by blood flow and the like, and a good received image can be acquired, and supplementary for supplementing the original observation by the arranged antennas 4a to 4h and the receiving device 5 Observation can be performed satisfactorily.

  During such operation, the image data from the capsule endoscope 2 received through the antenna 14 is displayed on the display unit 11 via the demodulator 34 and the signal processing circuit 35, while being stored in the built-in memory 36. Are also sequentially stored in association with the reception intensity at that time. The direct acquisition of the image data from the capsule endoscope 2 by the viewer 7 is auxiliary to a specific part such as the esophagus or stomach and does not require a storage capacity like the portable recording medium 9. Therefore, the internal memory 36 is sufficient. After the auxiliary observation by the viewer 7 is completed, the viewer 7 and the workstation 8 are connected by the communication cable 10 so that the in-vivo image data stored in the built-in memory 36 is transferred to the work through the communication output unit 40. By transmitting and transmitting to the station 8, it can be used for diagnosis together with the original in-vivo image data over the entire examination time acquired from the portable recording medium 9, and can contribute to a good examination.

  FIG. 7 is a schematic flowchart illustrating the above-described operation control example according to the connection state of the viewer 7 executed by the control unit 33. This process control is executed while the power switch 12 of the viewer 7 is turned on (step S100: Yes). First, based on the detection result of the receiver connection detection unit 39, it is determined whether or not the receiver (reception device) is connected (step S101). When the receiving device 5 is connected by the viewer cable 6 (step S101: Yes), the viewer 7 functions as a monitor of the receiving device 5 and acquires image data from the receiving device 5 side in real time (step S102). The acquired image is displayed on the display unit 11 in real time (step S103). Thereby, real-time observation through the receiving device 5 becomes possible.

  On the other hand, when the receiving device 5 is not connected (step S101: No), it is determined whether WS (workstation 8) is connected by the communication cable 10 (step S110). If the workstation 8 is connected (step S110: Yes), the image data stored in the built-in memory 36 is transmitted and output to the workstation 8 through the communication output unit 40 (step S111).

  Further, when the workstation 8 is not connected (step S110: No), a radio signal is received from the capsule endoscope 2 through the antenna 14 (step S120). In addition, the reception intensity at that time is detected (step S121). The body cavity image received together with the capsule picture display 41 indicating the reception intensity status is displayed on the display unit 11 in real time (step S122), and further, the body cavity image data is associated with the reception intensity at that time and stored in the built-in memory 36. Are sequentially stored (step S123). These process controls are repeated until the power switch 12 is turned off (step S130: Yes).

  In the present embodiment, the reception intensity state is visually notified by the capsule pictogram 41, which is a predetermined display pattern using a part of the display unit 11. However, the present invention is not limited to this. A pattern may be displayed in which the brightness of the backlight of the portion other than the capsule acquisition image 42 of the unit 11 is changed in a stepwise manner from a light state to a dark state according to a low to strong reception intensity level.

  Further, as shown in FIG. 8, a light emitting element for informing the reception state outside the display unit 11, for example, an LED 43, is added, and the LED 43 is displayed in a predetermined lighting display pattern according to a low to strong reception intensity level. You may control so that it may light. For example, in a state where the reception intensity is extremely weak, a warning is given by turning on the LED 43 in red, and in a state where the reception intensity does not reach a predetermined threshold level, the LED 43 blinks in red to call attention, and the reception intensity exceeds the threshold level. In this state, the lighting display pattern may be such that the LED 43 is lit in green.

  Further, not limited to visual notification, for example, a speaker or the like is built in the viewer 7, and “beep”, “beep”, “beep”, or “beep” is selected depending on the level of weak to strong reception. , “Pee”, “Pee”, etc., may be a method in which the information is audibly and gradually changed in steps.

1 is a schematic diagram illustrating an overall configuration of a wireless in-vivo information acquiring system that is a preferred embodiment of a portable simple image display device and a receiving system according to an embodiment of the present invention. It is a disassembled perspective view which mainly shows the structural example of a receiving system. It is a schematic block diagram which shows the structural example of the receiver which comprises the receiving system which concerns on this Embodiment, and a viewer. It is a schematic diagram which shows the example of a pattern of the capsule picture display which shows receiving intensity. It is a front view which shows the mode of reception intensity detection of the capsule endoscope before a test | inspection. It is a front view which shows the mode of reception intensity detection of the capsule endoscope under test | inspection. It is a schematic flowchart which shows the example of operation control according to the connection state of a viewer. It is a schematic front view which shows the modification using LED.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subject 2 Capsule-type endoscope 3 Reception system 4a-4h Arrangement antenna 5 Receiver 7 Viewer 9 Portable recording medium 11 Display part 14 Antenna 41 Capsule picture display 43 LED

Claims (12)

A portable simple image display device that integrally has an antenna for receiving a radio signal transmitted from an in-subject introduction device introduced into a subject and displays an image based on the received radio signal on a display unit. ,
Detecting means for detecting a reception intensity of a radio signal transmitted from the intra-subject introduction apparatus;
An informing means for informing the detected reception intensity status;
A portable simple image display device comprising:   The portable simple image display device according to claim 1, wherein the notification unit notifies the reception intensity state by visually changing the reception intensity state according to the detected reception intensity.   3. The portable simple image according to claim 2, wherein the notification unit uses a part of the display unit to notify the reception intensity state with a predetermined display pattern that changes in accordance with the detected reception intensity. Display device.   3. The portable simple image display device according to claim 2, wherein the notification means uses a light emitting element to notify the reception intensity status with a predetermined lighting display pattern that changes according to the detected reception intensity.   The portable simple image display device according to claim 1, wherein the notification means notifies the reception intensity state by aurally changing according to the detected reception intensity.   6. The portable simple image display device according to claim 1, further comprising a built-in memory that stores image data based on the received wireless signal. A wireless signal transmitted from the intra-subject introduction device that is carried by the subject and introduced into the subject is received by the antenna arranged for the subject, and image data based on the received wireless signal is stored in the storage unit. A receiving system comprising: a receiving device; and a portable simple image display device that is detachably connected to the receiving device and displays an image based on a radio signal received by the receiving device on a display unit,
The portable simple image display device includes:
An integrated antenna for receiving a radio signal transmitted from the in-subject introduction device;
Image display means for displaying an image based on a radio signal received by the antenna on the display unit;
Detecting means for detecting a reception intensity of a radio signal transmitted from the intra-subject introduction apparatus and received by the antenna;
An informing means for informing the detected reception intensity status;
A receiving system comprising:   The receiving system according to claim 7, wherein the notification unit notifies the reception intensity state by visually changing the reception intensity state according to the detected reception intensity.   9. The receiving system according to claim 8, wherein the notifying means notifies a reception intensity state with a predetermined display pattern that changes according to the detected reception intensity, using a part of the display unit.   9. The reception system according to claim 8, wherein the notification means uses a light emitting element to notify the reception intensity status with a predetermined lighting display pattern that changes according to the detected reception intensity.   The receiving system according to claim 7, wherein the notification unit notifies the reception intensity state by aurally changing according to the detected reception intensity.   The receiving system according to any one of claims 7 to 11, wherein the portable simple image display device includes a built-in memory for storing image data based on a received wireless signal.

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