JP7077993B2 - Breathing instruction device, radiography system, respiratory assist device and dynamic imaging method - Google Patents

Description

The present invention relates to a breathing instruction device, a radiological imaging system, a respiratory assist device, and a dynamic imaging method.

Conventionally, the state of natural respiration of a subject (for example, expansion / contraction of the lung field, etc.) is photographed in the form of a dynamic image composed of a plurality of frame images (hereinafter referred to as dynamic imaging).
For example, in Patent Document 1, a subject who breathes spontaneously is photographed dynamically, a plurality of dynamic images in a plurality of time phases are acquired, and a subject obtained from a change in the average signal value of the dynamic images in the time phase. It describes a dynamic imaging system that calculates the amplitude and period of each cycle of the examiner's dynamics as a feature amount, generates diagnostic support information based on the change in the feature amount between each cycle, and displays it on the display unit. ..
In a medical institution where such a dynamic imaging system is introduced, a doctor diagnoses a subject while referring to the reproduced dynamic image and diagnostic support information.

Japanese Unexamined Patent Publication No. 2009-273671

By the way, when the chest is dynamically photographed, it may be necessary to consciously exhale a large amount of breath instead of natural breathing. For example, the case of evaluating the maximum value of the patient's respiratory function, such as measuring the effort call curve by a spirometry test, corresponds to this.
On the other hand, patients with obstructive breathing disorders such as Chronic Obstructive Pulmonary Disease and asthma generally have difficulty exhaling and therefore pursed when exhaling (pursed lip breathing). To do). This is because when you exhale while purging your mouth, pressure is applied to the alveoli and trachea, expanding the obstruction and making breathing easier.
Since the airway obstruction disappears when a patient with such obstructive respiratory disorder breathes while purging his mouth in dynamic photography accompanied by effort exhalation, a doctor who makes a diagnosis using the dynamic image obtained by this photography , The findings of obstructive breathing disorders may be overlooked.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent a subject from breathing while purging his mouth when taking a dynamic image.

In order to solve the above problems, the present invention
It is a breathing instruction device used when photographing the dynamics of a subject by using a radiological imaging device capable of capturing a dynamic image consisting of a plurality of frame images.
It is characterized by providing an instruction means for instructing the subject to breathe without purging his mouth.

Further, the present invention
It is a breathing aid that the subject uses in addition to his mouth.
Formed in a cylindrical shape with both ends open,
It is characterized in that at least the portion held in the mouth has a diameter such that the mouth cannot be deflated when the subject holds the mouth.

According to the present invention, it is possible to prevent the subject from breathing while purging his mouth when taking a dynamic image.

It is a block diagram which shows the radiological imaging system which concerns on embodiment of this invention. It is a block diagram which shows the breathing instruction device provided in the radiography system of FIG. It is a flowchart which shows the breathing instruction processing performed by the breathing instruction device of FIG. It is a front view in the state where the subject of the imaging table provided in the radiography imaging system of FIG. 1 is arranged. It is a front view in the state where the subject of the imaging table provided in the radiography imaging system of FIG. 1 is arranged. It is a perspective view of the respiratory assist device which concerns on embodiment of this invention. It is a side view of the respiratory assist device of FIG. It is a front view of the respiratory assist device which concerns on the modification of the same embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

[Radiation imaging system (1)]
First, a schematic configuration of the radiography system 100 according to the present embodiment will be described. FIG. 1 is a block diagram showing a radiography system 100 according to the present embodiment.

As shown in FIG. 1, the radiography system 100 includes a radiation irradiation device 1, a radiography device 2, and a breathing instruction device 3.
Further, the radiography system 100 according to the present embodiment further includes a console 4, a picture archiving and communication system (PACS5), an image analysis device 6, and an image pickup table 7.
These can communicate with each other via the communication network N.

The radiography system 100 may be connectable to a hospital information system (HIS) (not shown) or a radiology information system (RIS).
Further, the radiography imaging system 100 may be installed in the radiography chamber, and a part thereof (for example, the radiation irradiation device 1, the radiography imaging device 2 and the breathing instruction device 3) can be moved so as to be called a round-trip car. It may be configured.

The irradiation device 1 includes a generator that applies a voltage according to preset irradiation conditions (tube voltage, tube current, irradiation time (mAs value), etc.) based on the operation of the irradiation instruction switch. When a voltage is applied from the generator, it is provided with a radiation source or the like that generates a dose of radiation (for example, X-ray) corresponding to the applied voltage.

Then, the radiation irradiation device 1 repeatedly irradiates the pulsed radiation a plurality of times (for example, 15 times per second) in a short time.
It should be noted that the pulsed radiation may be continuously irradiated instead of being repeatedly irradiated.

Although not shown, the radiographing apparatus 2 has a two-dimensional (matrix) pixel having a radiation detecting element that generates an electric charge according to a dose and a switch element that accumulates and emits an electric charge by receiving radiation. A scanning circuit that switches on / off of each switch element, a reading circuit that reads out the amount of charge emitted from each pixel as a signal value, and a radiation image generated from multiple signal values read by the reading circuit. It is equipped with a control unit, an output unit that outputs the generated radiation image data, etc. to the outside by wire or wirelessly.

Then, the radiography apparatus 2 repeatedly generates a radiation image corresponding to the irradiated radiation a plurality of times (for example, 15 times per second) in a short time in synchronization with the timing at which the radiation is irradiated from the irradiation apparatus 1. ..

The radiography apparatus 2 has a built-in scintillator or the like, and the irradiated radiation is converted into light of another wavelength such as visible light by the scintillator to generate an electric charge according to the converted light (so-called indirect type). It may be a type that directly generates an electric charge from radiation without going through a scintillator or the like (so-called direct type).
Further, the radiological imaging device 2 may be a dedicated machine type integrated with an imaging table or a portable type (cassette type).

The breathing instruction device 3 is used when photographing the dynamics of the subject S (particularly the expansion / contraction of the lung field in the chest) using the radiography imaging device 2, and is used for a PC, a mobile terminal, or a dedicated device. It is composed of such things.
The details of the breathing instruction device 3 will be described later.

The console 4 is composed of a PC, a mobile terminal, a dedicated device, and the like.
Further, the console 4 is subject to various imaging conditions (for example, a portion to be imaged, etc.) of the irradiation irradiation device 1 and the radiation imaging device 2 based on an imaging order from another device or system (RIS or the like) or an operation by a user. It is possible to set conditions related to the examiner S and conditions related to radiation irradiation such as tube voltage, tube current, and irradiation time).
The console 4 may be integrally configured with the breathing instruction device 3 (the console 4 may be provided with various functions of the breathing instruction device 3).

The imaging table 7 is for supporting the radiography imaging device 2 at the imaging position.
The details of the shooting table 7 will be described later.

In the radiography system 100 according to the present embodiment configured as described above, the radiation source of the radiation irradiation device 1 and the radiography device 2 are arranged so as to face each other with a gap between them, and the subject S arranged between them. By irradiating the subject S with radiation from a radiation source, it is possible to perform dynamic photography (also referred to as serial photography) of the subject S.
This "dynamic imaging" means that the radiological imaging device 2 accumulates charges and reads out signal values multiple times in a short time (for example, 15 per second) based on one imaging operation (for example, pressing the irradiation instruction switch). (Times) Repeatedly, it means to repeatedly generate a series of data of a plurality of radiation images according to the radiation emitted from the radiation irradiation device 1.
Hereinafter, a series of a plurality of radiographic images obtained by dynamic imaging will be referred to as a dynamic image, and individual radiographic images constituting the dynamic image will be referred to as a frame image.

[Breathing indicator]
Next, a specific configuration of the breathing instruction device 3 included in the radiography system 100 will be described. FIG. 2 is a block diagram showing a breathing instruction device 3, and FIG. 3 is a flowchart showing a breathing instruction process executed by the breathing instruction device 3.

The breathing instruction device 3 is composed of a PC, a mobile terminal, a dedicated device, and the like, and as shown in FIG. 2, the control unit 31, the storage unit 32, the breathing monitoring unit 33, the breathing instruction unit 34, and the like. It is equipped with.
Each part 31 to 34 is electrically connected.

The control unit 31 is configured to comprehensively control the operation of each unit of the breathing instruction device 3 by a CPU (Central Processing Unit), a RAM (Random Access Memory), or the like. Specifically, various processing programs stored in the storage unit 32 are read out, expanded in RAM, and various processing is executed according to the processing program.

The storage unit 32 is composed of an HDD (Hard Disk Drive), a semiconductor memory, or the like, and stores a processing program for executing various processes such as operation instructions described later, parameters necessary for executing the processing program, files, and the like. I remember.

The breathing monitoring unit 33 may include a sensor for detecting the breathing state of the subject S, or another device or other device (for example, a breathing assist device described later) provided with a sensor for detecting the breathing state of the subject S. It is composed of a network interface capable of communicating with a camera or the like that captures the face of a subject via a communication network N such as LAN (Local Area Network), WAN (Wide Area Network), and the Internet.

The breathing instruction unit 34 is composed of a display unit such as a liquid crystal display panel, a speaker, or the like, and can display, output voice, emit light, etc. according to an instruction of a control signal input from the control unit 31.
The breathing instruction unit 34 is required to be in the vicinity of the subject S, while other configurations of the breathing instruction device 3 do not necessarily have to be in the vicinity of the subject S. Therefore, the breathing instruction unit 34 may be separated from the other configurations of the breathing instruction device 3.

The breathing instruction device 3 according to the present embodiment configured as described above has a function of executing the breathing instruction processing shown in FIG. 3 when performing dynamic imaging.
In this breathing instruction processing, first, the subject S is instructed to breathe without purging his mouth (step S1).
The process of this step S1 may be started immediately after the power is turned on to the breathing instruction device 3, or that a predetermined operation has been performed by the user or that the subject S has been prepared (for example, a body movement described later). It may be started when the attachment of the restraining device is detected, etc.).

Specific examples of the instruction method include outputting the instruction content by voice using a speaker, or displaying the instruction content using a display unit such as a liquid crystal display panel.
In addition to the instruction to breathe without purging the mouth, the instruction to exhale greatly may be given.
In addition to the instruction to breathe without purging the mouth, the instruction to exhale to the end may be given.
Further, as an instruction to breathe without purging the mouth, an instruction to wear a breathing assist device described later may be given.
The control unit 31 functions as an instruction means by executing the process of step S1. Then, when this process is executed, the subject S starts the effort call.

After starting the instruction to breathe without purging the mouth, the respiratory state of the subject S is monitored (step S2).
The process of step S2 is performed in parallel with the instruction to breathe without purging the mouth.
Specifically, the sensor constituting the respiration monitoring unit 33 is activated, or communication with another device or other device having the sensor in the network interface is started.
The control unit 31 functions as a monitoring means by executing the process of step S2.

After starting the monitoring of the respiratory state, the device for taking a dynamic image is controlled to start taking a picture according to the respiratory state of the subject S (step S3).
Specifically, for example, when the breathing speed of the subject S becomes equal to or less than a predetermined start reference value, the device for taking a dynamic image is controlled to start taking a picture.
The "device for capturing a dynamic image" refers to at least one of the radiation irradiation device 1 and the radiography device 2.
It should be noted that the control for starting the imaging may be performed when the control signal is received from the radiation irradiation device 1 or the console 4.

When a camera or the like for photographing the above-mentioned face is connected to the respiration monitoring unit 33, the face of the subject is photographed after the start of the imaging, and the photographed face of the subject S is analyzed. You may want to monitor for pursed mouth.
Then, when it is detected that the subject S has squeezed his mouth, he may give an instruction to breathe without purging his mouth in a stronger tone.

After the control to start the imaging is performed, the device for capturing the dynamic image is controlled to end the imaging according to the respiratory state of the subject S (step S4).
Specifically, when the breathing speed of the subject S becomes equal to or less than a predetermined end reference value, the device for capturing a dynamic image is controlled to terminate the imaging.
The control unit 31 functions as a control means by executing the processes of steps S3 and S4.

In addition to the function of executing the breathing instruction processing, the control unit 31 measures the area of the lung field based on a plurality of frame images obtained by imaging when the imaging target site is the chest. It may have a function as a means.
In that case, in step S4, instead of the process of step S4, the device for taking a dynamic image is triggered when the rate of change in the measured area of the lung field becomes equal to or less than a predetermined reference value. On the other hand, control may be performed to end the shooting.

After the control to end the photographing is performed, the instruction to breathe without purging the mouth is terminated (step S5).
The process of this step S5 may be performed at the same time as the above step S4.

After the imaging is completed, the detected respiratory state is transmitted to the destination (for example, console 4 or PACS 5) of the dynamic image generated by the radiography apparatus 2, and each frame image of the dynamic image and each frame image are transmitted to the destination. You may save it by associating it with the speed of breathing when it is generated.

Further, after the imaging is completed, the detected respiratory state is transmitted to the destination of the dynamic image generated by the radiography apparatus 2 (for example, the image analysis apparatus 6), and the lung field area, the diaphragm movement amount, and the lung field are captured at the destination. Respiratory function may be calculated based on at least one of the information of the signal value of the region and the wind velocity to generate a diaphragm, or the lung age may be calculated.

[Shooting table]
Next, a specific configuration of the imaging table 7 included in the radiography imaging system 100 will be described. FIGS. 4 and 5 are front views in a state where the subject S of the photographing table is arranged.

As shown in FIGS. 4 and 5, the photographing table 7 according to the present embodiment includes a support column 71, a photographing device holding portion 72, a chair 73, and body movement suppressing devices 74 to 76.

The column 71 is erected so as to extend vertically upward from the floor surface.
The upper end of the support column 71 is higher than that of the standing subject S.

The photographing device holding portion 72 is supported by the support column 71 so as to be movable in the vertical direction.
Further, the imaging device holding portion 72 is formed in a box shape into which the radiography imaging device 2 can be loaded.
The side portion of the photographing device holding portion 72 may be a handle 82a for the user or the subject S to grasp or lock the body movement suppressing band 74 described later.

The chair 73 is used when the subject S in the sitting position is photographed, and the subject S can sit down.
The chair 73 may be independent of the support column 71 or the photographing device holding portion 72, or may be a part thereof.
When the chair 73 is attached to the support column 71 or the photographing device holding portion 72, it can be folded or rotated to the rear side of the support column 71 so as not to interfere with the standing shooting. Is preferable.

The body movement suppression devices 74 to 76 are a general term for the body movement suppression band 74, the grip bar 75, and the forward bending prevention device 76. These are for suppressing the subject S, who is positioned in a predetermined posture in front of the photographing table 7, from losing the predetermined posture.
In the present embodiment, it is assumed that the photographing table 7 is provided with all of these instruments, but it is sufficient that at least one of these is provided.

The body movement suppression band 74 is a band-shaped member for binding the subject S located on the front side of the imaging device holding portion 72 to the imaging device holding portion 72 of the imaging table 7.
The body movement suppression band 74 may be a member independent of the photographing device holding portion 72, or may be a part of the photographing device holding portion 72.
Further, as the body movement suppressing band 74, a plate-shaped hard member may be used instead of the band-shaped member.

The grip bar 75 is provided at the upper end of the support column 71 of the photographing table 7 so that the subject S can grip it.
The grip bar 75 is configured so that the height of the gripping rod 75 can be changed so that both the standing subject S and the sitting subject S can be grasped, and the height can be fixed at the changed height. Is preferable.
If the grip bar 75 is not provided, the grip bar 75 can be replaced by holding the hands behind the support column 71 or by holding the handle 82a of the photographing device holding portion 72.

The forward bending prevention device 76 is for preventing the subject S who makes an effort call from bending forward or leaning his / her head, and includes a support portion 76a and a contact portion 76b. ..
The support portion 76a according to the present embodiment extends upward from the floor surface, for example.
The support portion 76a may extend from the support column 71 or the photographing device holding portion 72.
The contact portion 76b is provided on the support portion 76a (for example, the tip portion) to bring the subject S into contact with the face (particularly the forehead) and to regulate the movement of the subject S's head. Has been done.
The contact portion 76b can rotate with the vertical line as the rotation axis in order to correspond to the direction of the face of the subject S at the time of shooting (changes by 90 ° between when shooting the front and when shooting the side). It is preferable to rub.

[Dynamic image shooting method (1)]
Next, a dynamic image photographing method for photographing the dynamics of the subject using the radiological imaging system 100 will be described.

In dynamic photography, first, the subject S is placed in front of the photographing table 7. In the case of standing frontal imaging, for example, as shown in FIG. 4A, the subject S is made to stand so that the back of the subject S abuts on the front surface of the imaging device holding portion 72.
On the other hand, when performing frontal imaging in a sitting position, for example, as shown in FIG. 4B, the positions of the imaging device holding portion 72, the grip bar 75, and the contact portion 76b of the forward bending prevention device 76 are lowered to be inspected. The person S is seated on the chair 73 so that his / her back is in contact with the front surface of the photographing device holding portion 72.
When performing side-viewing in a standing or sitting position, for example, as shown in FIG. 5, the subject S is made to stand or sit so that the side surface of the subject S abuts on the front surface of the imaging device holding portion 72.

After arranging the subject S, the subject S is fixed to the photographing table 7 by using the body movement suppressing devices 74 to 76. Specifically, the subject S may be tied to the photographing device holding portion 72 by using the body movement suppressing band 74, the subject S may be grasped by the gripping rod 75, or the contact portion of the forward bending prevention device 76. The 76b is brought into contact with the face of the subject S.

When each device is ready, the breathing instruction device 3 causes the subject S to exhale by initiating an instruction to breathe without purging his mouth.
Then, the breathing instruction device 3 controls the radiation generator 1 and the radiography apparatus 2 to start imaging, and the radiation generator 1 and the radiographing apparatus 2 control the dynamics of the subject S exhaling. To shoot. During this time, the subject S continues to exhale while being conscious of not purging his mouth.
When the imaging is completed (the subject S finishes exhaling), the breathing instruction device 3 ends the instruction to breathe.

As described above, according to the radiography system 100 according to the present embodiment, when taking a dynamic image, the subject S is instructed to breathe without purging his mouth, and the subject is examined. Since the person S becomes aware that he / she does not squeeze his / her mouth, it is possible to prevent the subject S from breathing while squeezing his / her mouth.
As a result, the dynamic image of the subject with chronic obstructive pulmonary disease surely shows the characteristics of chronic obstructive pulmonary disease, so that the doctor does not have to worry about overlooking the disease.

[Respiratory aid]
Next, a specific configuration of the respiratory assist device 8 will be described. FIG. 6 is a perspective view of the respiratory assist device 8 according to the present embodiment, and FIG. 7 is a side view of the respiratory assist device 8.

The respiratory assist device 8 is used with the subject S in the mouth.
Further, as shown in FIG. 6, the respiratory assist device 8 according to the present embodiment includes a main body 81, a control unit 82, a storage unit 83, a communication unit 84, a sensor 85, and a display unit 86. ing.
Electronic components other than the main body 81 are electrically connected.
In the present embodiment, the electronic parts are provided, but the respiratory assist device may not be provided with the electronic parts.
Further, even when the electronic components are provided, for example, the display unit 86 may not be provided.

The main body 81 is formed in a cylindrical shape with both ends open, and has a diameter such that at least a portion to be held in the mouth cannot be squeezed when the subject holds the body.
In the present embodiment, for example, in order to facilitate manufacturing, the entire diameter is made into a cylindrical shape having the same diameter.
The diameter of the main body 81 is preferably in the range of 20 to 30 mm, more preferably about 25 mm.
The length of the main body is preferably in the range of 60 to 80 mm, more preferably about 70 mm.

The body 81 is made of paper or plastic to allow it to be disposable.
When an electronic component such as a control unit 82 is attached as in the present embodiment, the portion to be held in the mouth and its vicinity (for example, the portion to be gripped) are included in order to save the trouble of replacing the electronic component. Only about half of the main body 81) may be removed and replaced.
Further, a breathing port provided in a device for performing spirometry (respiratory function test) (for example, a spirometer or the like) may be connected to the tip of the main body 81.

Further, in order to prevent the main body 81 from popping out of the mouth when exhaling, the main body 81 is provided with a protrusion 81a or a recess 81b at a portion where the lips of the subject S come into contact, as shown in FIG. There is.
The main body 81 may have an elliptical cross section orthogonal to the penetrating direction, as shown in FIG. 8, in consideration of being used by the subject S who has difficulty in opening the mouth wide.

The control unit 82 is configured to comprehensively control the operation of each unit of the breathing instruction device 3 with a CPU, RAM, or the like. Specifically, various processing programs stored in the storage unit 32 are read out, expanded in RAM, and various processing is executed according to the processing program.

The storage unit 83 is composed of an HDD, a semiconductor memory, or the like, and stores a processing program for executing various processes such as operation instructions described later, parameters necessary for executing the processing program, files, and the like.

The communication unit 84 is composed of a network interface or the like, and is another device (radiation irradiation device 1, radiography device 1) connected via a communication network N such as a LAN (Local Area Network), WAN (Wide Area Network), or the Internet. It is possible to transmit control signals and data to 2 or the breathing instruction device 3).

The sensor 85 is for measuring the breath exhaled by the subject S, and is provided in the inner space (breath passage) of the main body 81 as shown in FIG.
Specifically, for example, the speed of exhalation by the subject S, the amount of exhalation, the duration of exhalation, and the like are measured.

The display unit 86 is provided on the outer surface of the end portion of the main body 81 away from the portion held by the mouth.
The display unit 86 is composed of, for example, a liquid crystal display panel, a 7-segment type display, a meter, or the like.

The control unit 82 of the respiratory assist device 8 configured in this way has the following functions.
For example, the control unit 82 has a function of transmitting a measurement result regarding the breath exhaled by the subject S to the breathing instruction device 3 via the communication unit 84.

Further, the control unit 82 has a function of displaying the measurement result regarding the breath exhaled by the subject S on the display unit 86.
In addition, examples of the method for displaying the measurement result include numbers, meters, light, voice, gimmicks, and the like.
The control unit 82 serves as a display control means by having the above functions.

[Dynamic imaging method (2)]
Next, a dynamic image capturing method for photographing the dynamics of the subject using the respiratory assist device 8 will be described.

In this dynamic imaging, first, the subject S is placed in front of the imaging table 7, and the subject S is fixed to the imaging table 7. The specific method of arranging and fixing the subject S is the same as that of the above-mentioned dynamic imaging method (1).
After the placement / fixation of the subject S, or in parallel with the placement / fixation, the respiratory assist device 8 is added to the subject S. As a result, the subject S is in a state where he / she cannot squeeze his / her mouth.

When each device is ready, the photographer (or the breathing instruction device 3) starts an instruction to breathe, so that the subject S holding the breathing assist device 8 exhales.
Then, the radiation generator 1 and the radiographing apparatus 2 photograph the dynamics of the subject S exhaling. During this time, the subject S will continue to exhale without purging his mouth.
By connecting, for example, a spirometer inlet to the respiratory assist device 8, the respiratory function may be measured in parallel with the imaging of the dynamics.
When the photographing is completed, the photographer (or the breathing instruction device 3) ends the instruction that the photographer (or the breathing instruction device 3) breathes.

As described above, according to the respiratory assist device 8 according to the present embodiment, the subject S is physically restricted from trying to squeeze his mouth when taking a dynamic image. Person S can be prevented from breathing while purging his mouth, and there is no concern that the doctor overlooks chronic obstructive pulmonary disease.
Further, since it is not necessary to use the breathing instruction device 3, it is possible to prevent the subject S from breathing while purging his mouth at low cost.

100 Radiation imaging system 1 Radiation irradiation device 2 Radiation imaging device 3 Breathing instruction device 31 Control unit 32 Storage unit 33 Respiratory monitoring unit 34 Respiratory instruction unit 4 Console 5 Image storage communication system 6 Image analysis device 7 Imaging table 71 Pillar 72 Imaging device holding Part 73 Chair 74 Body movement suppression band (body movement suppression device)
75 sticks (body movement suppression device)
76 Prevention device (body movement suppression device)
76a Support part 76b Contact part 8 Respiratory aid 81 Main body 81a Tension 81b Depression 82 Control part 82a Handle 83 Storage part 84 Communication part 85 Sensor 86 Display part N Communication network S Subject

Claims (19)

It is a breathing instruction device used when photographing the dynamics of a subject by using a radiological imaging device capable of capturing a dynamic image consisting of a plurality of frame images.
A breathing instruction device comprising: an instruction means for instructing the subject not to breathe while purging his mouth. The breathing instruction device according to claim 1, wherein the instruction means gives an instruction to breathe without purging the mouth and an instruction to exhale greatly. The breathing instruction device according to claim 1 or 2, wherein the instruction means gives an instruction to breathe without purging the mouth and an instruction to exhale to the end. The breathing instruction device according to any one of claims 1 to 3, wherein the instruction means gives an instruction by outputting the instruction content by voice or displaying the instruction content. A monitoring means for monitoring the respiratory condition of the subject is provided.
The first aspect of claim 1, wherein the device for capturing a dynamic image composed of a plurality of frame images is provided with a control means for controlling the start of imaging according to the respiratory state of the subject. Breathing indicator. The control means is characterized in that the device for taking a dynamic image is controlled to start taking a picture when the breathing speed of the subject becomes equal to or less than a predetermined start reference value. The breathing instruction device according to claim 5. The fifth or sixth aspect of the present invention, wherein the control means controls the device for capturing the dynamic image to end the imaging according to the respiratory state of the subject. Breathing indicator. The control means is characterized in that, when the breathing speed of the subject becomes equal to or less than a predetermined end reference value, the device for photographing the dynamic image is controlled to end the imaging. The breathing instruction device according to claim 7. When the area to be imaged is the chest, a measuring means for measuring the area of the lung field based on the plurality of frame images obtained by the imaging is provided.
The control means is characterized in that when the rate of change in the measured area of the lung field becomes equal to or less than a predetermined reference value, the device for capturing the dynamic image is controlled to end the imaging. The breathing instruction device according to claim 7. The breathing instruction device according to any one of claims 1 to 9,
A radiography system including a radiography device that repeatedly generates a radiation image according to the radiation emitted from the radiation irradiation device. It is characterized by having a respiratory assist device that is formed in a cylindrical shape with both ends open, and at least the part that can be held in the mouth has a diameter that does not allow the subject to squeeze the mouth when the subject holds it. 10. The radiography system according to claim 10. The radiation according to claim 10 or 11, wherein the subject who is located in a predetermined posture in front of the photographing table is provided with a body movement suppressing device for suppressing the predetermined posture from being disturbed. Shooting system. A respiratory aid that is used when the subject is in the mouth.
Formed in a cylindrical shape with both ends open,
A respiratory assist device characterized in that at least a portion held in the mouth has a diameter such that the mouth cannot be deflated when the subject holds the mouth. 13. The respiratory aid according to claim 13, which is made of paper or plastic. The respiratory assist device according to claim 13, wherein the cross section orthogonal to the penetrating direction has an elliptical shape. The respiratory assist device according to any one of claims 13 to 15, wherein a protrusion or a dent is provided at a portion of the subject in contact with the lips. The respiratory assist device according to any one of claims 13 to 16, further comprising a sensor for measuring the exhaled breath of the subject. The display unit provided on the outer surface and
The respiratory assist device according to claim 17, further comprising a display control means for displaying the measurement result of the breath exhaled by the subject on the display unit. It is a dynamic image capturing method that captures the dynamics of a subject using a radiological imaging device that can capture dynamic images consisting of a plurality of frame images.
The subject has a respiratory assist device in which at least the part held in the mouth has a diameter that does not allow the subject to squeeze the mouth when the subject holds the mouth, and the respiratory assist device is formed in a cylindrical shape with both ends open. In addition,
Have the subject exhale with the breathing aid in his mouth.
A dynamic image photographing method, which comprises photographing the dynamics of the subject who is exhaling.

Images