CN111820933A - Breath holding system matched with coronary artery CT imaging and use method thereof - Google Patents
Breath holding system matched with coronary artery CT imaging and use method thereof Download PDFInfo
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- CN111820933A CN111820933A CN202010533014.5A CN202010533014A CN111820933A CN 111820933 A CN111820933 A CN 111820933A CN 202010533014 A CN202010533014 A CN 202010533014A CN 111820933 A CN111820933 A CN 111820933A
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- 206010006322 Breath holding Diseases 0.000 title claims abstract description 35
- 238000013170 computed tomography imaging Methods 0.000 title claims abstract description 23
- 210000004351 coronary vessel Anatomy 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 56
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims abstract description 35
- 230000005611 electricity Effects 0.000 claims abstract description 8
- 238000009423 ventilation Methods 0.000 claims description 22
- 230000000241 respiratory effect Effects 0.000 claims description 17
- 210000001015 abdomen Anatomy 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 210000000115 thoracic cavity Anatomy 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000741 silica gel Substances 0.000 description 7
- 229910002027 silica gel Inorganic materials 0.000 description 7
- 238000002591 computed tomography Methods 0.000 description 6
- 238000003745 diagnosis Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 210000000038 chest Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- 230000003187 abdominal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 206010003119 arrhythmia Diseases 0.000 description 1
- 230000006793 arrhythmia Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 230000002123 temporal effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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Abstract
The invention discloses a breath holding system matched with coronary artery CT imaging and a use method thereof, wherein the breath holding system comprises: hold the breath detection device with CT detector electricity is connected and hold the breath actuating device with hold the breath detection device electricity is connected, and wherein, hold the breath detection device includes: the CT detector comprises a processing terminal unit electrically connected with the CT detector and a respiration detection unit wirelessly connected with the processing terminal unit, wherein the respiration detection unit is used for acquiring a respiration oscillogram of a detected person; the breath-hold execution device comprises: the nose cup, pivotal connection is in the bottom of nose cup and can seal the bottom plate of nose cup inner chamber to and the control bottom plate is the control valve of closed or open mode, wherein, the control valve is connected with the processing terminal unit electricity of holding one's breath detection device, two air vents have been seted up to the bottom plate in the nostril department of the person of the examined who wears the nose cup, install the one-way air vent head that extends towards the nose cup inner chamber in every air vent, the vent gap that the width is less than 1.5 millimeters is seted up at the top of every one-way air vent head.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a breath holding device matched with CT imaging and a using method thereof.
Background
CT imaging, as a living body imaging mode, has the advantages of high spatial resolution, short imaging time, relatively low cost, capability of obtaining three-dimensional structure information under the condition of an animal living body and the like. However, when the chest, abdomen, or the like of a living animal is imaged by using the micro CT, a motion artifact is generated by the breathing motion of the living animal, and the spatial resolution of an image is lowered.
Coronary artery CT imaging (CCTA) can be used for cardiovascular disease diagnosis, screening, treatment, follow-up, and the like. In the CCTA examination, respiration control is used to avoid the occurrence of respiratory motion artifacts, and for a patient with difficulty in holding breath, the CCTA examination cannot be well matched with the respiration control, so that the images have a fault artifact, and the accuracy of diagnosis is reduced or even the examination fails. Although the effect of high heart rate, arrhythmia, etc. on image quality is reduced as the temporal resolution of high-end CT increases and the detector widens, breathing artifacts remain a major factor affecting image quality. If obvious respiratory motion occurs during scanning, the heart can shift integrally, which leads to interruption, shift or dislocation of main trunk and branch of coronary artery, resulting in obvious degradation of image quality and even influence on diagnosis.
For example, chinese patent application No. 201911121406.4 provides an automatic breath-holding detection device for CT scanning, which includes a main breath-holding detection unit, an elastic waistband and two tension bands. The screen air detection host is internally provided with two tension sensors and a detection circuit, each tension sensor is connected with a tension belt through a tension ring, one end of each tension ring is fixed in the tension sensor, the other end of each tension ring is connected to one end of the tension belt, the other end of each tension belt is provided with a Japanese-shaped plastic buckle, and one end of an elastic waistband is fixedly arranged on the Japanese-shaped plastic buckle; each tension sensor is used for converting the physical tension born by the tension belt into an analog electric signal; the detection circuit is used for detecting and analyzing the analog electric signal and generating a pulling force value, outputting the pulling force value to the LCD display screen for displaying, and controlling the loudspeaker to give out warning sound when the pulling force value does not reach the screen gas threshold value. Then, the breath holding automatic detection device for CT scanning disclosed in the patent can only detect the breath holding condition of the patient under CT scanning, and prevent the motion artifact caused by the abdominal breathing motion of the patient during breath holding, which cannot help the patient to hold breath.
Therefore, the breath holding system which can interact with the CT equipment and can help the patient to realize the breath holding and is matched with the coronary artery CT imaging and the using method thereof become the problem which needs to be solved urgently in the industry.
Disclosure of Invention
The invention aims to provide a breath holding system matched with coronary artery CT imaging and a using method thereof, wherein the breath of a patient can be detected, the breath holding system is interacted with CT equipment, the breath holding waveform is used for judging that the patient can not hold breath, and if the breath holding waveform is detected that the patient can not realize self-initiative breath holding, a breath holding device is started to complete the matching examination.
The invention aims at providing a breath holding system matched with coronary artery CT imaging, which comprises: hold the breath detection device with CT detector electricity is connected and hold the breath actuating device with hold the breath detection device electricity is connected, and wherein, hold the breath detection device includes: the CT detector comprises a processing terminal unit electrically connected with the CT detector and a respiration detection unit wirelessly connected with the processing terminal unit, wherein the respiration detection unit is used for acquiring a respiration oscillogram of a detected person; the breath-hold execution device comprises: the nose cup, pivotal connection is in the bottom of nose cup and can seal the bottom plate of nose cup inner chamber to and the control bottom plate is the control valve of closed or open mode, wherein, the control valve is connected with the processing terminal unit electricity of holding one's breath detection device, two air vents have been seted up to the bottom plate in the nostril department of the person of the examined who wears the nose cup, install the one-way air vent head that extends towards the nose cup inner chamber in every air vent, the vent joint of width less than or equal to 1.5 millimeters is seted up at the top of every one-way air vent head.
Optionally, the processing terminal unit is electrically connected to the CT detector in a peripheral gated manner.
Preferably, the top of each one-way ventilation head is provided with a ventilation slit with the width of 0.5-1.5 mm.
Alternatively, the respiration waveform detected by the respiration detecting unit is set to a waveform in which the respiration intensity varies with the respiration time, and the respiration intensity is set to the difference in the internal and external air pressures of the chest. In the present invention, the respiratory waveform map is: and y is f (t), wherein t is the breathing time in one breathing cycle, and y is the breathing intensity.
Optionally, the one-way ventilation head is in a cone frustum shape, and the top end of the cone frustum is provided with a ventilation seam.
Optionally, the nose mask, the base plate, and the one-way vent are all made of silicone. The setting of silica gel material can prevent that the nose cup from compressing tightly the facial skin of person of being examined for a long time and causing person of being examined skin extrusion to appear the blue or green or painful condition. Meanwhile, the bottom plate is made of silica gel, so that the bottom plate has good tightness to the skin of the outer ring of the nose of a patient in the compressing process. By using the soft elasticity of the silica gel, the unidirectional ventilation head can be ensured not to hurt the nostril of the examined person, and simultaneously the requirement on the hardness of the gas unidirectional passage can be met.
Alternatively, both sides of the nose mask are provided with elastic nose clips for fixing it at the nose of the subject, thereby achieving the fixing effect of the nose mask.
Alternatively, elastic bands are attached to both sides of the nasal mask, whereby the elastic bands can be fitted over the head of the subject to cover the nasal mask over the nose of the subject.
Alternatively, the pivotal connection to the bottom of the nasal mask and the sealing of the floor of the internal cavity of the nasal mask may be accomplished by a variety of mechanisms, such as pneumatic or electro-magnetic actuation of the floor. Optionally, the breath-holding executing device further comprises a pull wire for closing the bottom plate, a micro motor electrically connected with the control valve and arranged on the nose mask, and a wire spool driven by the micro motor, wherein one end of the pull wire is fixedly connected to the wire spool, and the other end of the pull wire is fixedly connected to the free end of the bottom plate, so that when the wire spool is driven by the micro motor to rotate, the pull wire is wound on the wire spool to pull the free end of the bottom plate to rotate around the pivot shaft, and the bottom plate is sealed with the inner cavity of the nose mask. When the micro motor rotates reversely, the pull wire is released, the bottom plate is freely released under the action of gravity, and the sealing of the cavity in the nose mask is released.
A second object of the present invention is to provide a method for using the breath-hold system in conjunction with the coronary CT imaging, which comprises: (1) binding the respiration detection unit to the abdomen of the examinee, starting the breath holding detection device, measuring at least 10 groups of respiration oscillograms of the examinee by the processing terminal unit, and carrying out average processing on the at least 10 groups of respiration oscillograms to obtain average respiration intensity; (2) the respiration detection unit is started to detect the respiration intensity of the examinee and acquire the corresponding respiration intensity, and the processing terminal unit monitors the respiration wave intensity of the examinee measured by the respiration detection unit in real time; and (3) when the real-time expiratory intensity meets the condition, the CT detector acquires the CT images of the coronary artery acquired in the corresponding period.
Wherein, step (3) includes: (3-1) when the expiratory intensity is lower than the average respiratory intensity obtained in the step (1), the processing terminal unit instructs the CT detector to obtain the coronary CT images acquired in the corresponding period; and (3-2) when the expiratory intensity is higher than the average respiratory intensity obtained in the step (1), the processing terminal unit sends an instruction to a control valve of the breath holding execution device, after the bottom plate is closed, the real-time monitoring on the respiratory wave intensity of the detected person measured by the breath detection unit is continued, and when the expiratory intensity is lower than the average respiratory intensity obtained in the step (1), the processing terminal unit instructs the CT detector to obtain the coronary artery CT images obtained in the corresponding period.
Therefore, when the processing terminal unit detects that the examinee can achieve the breath-hold effect autonomously, the examinee does not need to carry out passive breath-holding operation. And when the person of being examined can't independently control and close the gas, just start the control valve of holding a breath final controlling element, seal the bottom plate in the bottom of nose cup for the nose cup forms inclosed cavity, when the person of being examined wants to exhale, the inside atmospheric pressure of cavity is greater than the internal pressure of one-way ventilation head, thereby the external pressure of one-way ventilation head presses the gas vent to closely laminating can't ventilate, makes the person of being examined can't exhale through the nostril. When the examinee needs to breathe in, the inside atmospheric pressure of cavity is less than the inside atmospheric pressure of one-way ventilation head, and the inside atmospheric pressure of one-way ventilation head backs down the crack and makes the air can circulate to make one-way ventilation head let the examinee's nostril can only breathe in unable expiration, reach the effect that lets the examinee hold the breath.
The invention has the beneficial effects that: (1) the gas-holding device is simple in structure, simple to operate, safe and practical; (2) the invention can ensure the comfort of the examined person, and when the examined person can close the breath by himself, the forced operation can not be carried out; (3) the obtained CT scanning image is clear, and the quality of the CT scanning image is improved, so that the CT scanning result is more accurate, and a doctor is assisted to more accurately distinguish the lesion part of the patient.
Drawings
Fig. 1 shows a schematic configuration diagram of a breath holding system of the present invention in cooperation with coronary CT imaging.
Figure 2 shows a schematic of the construction of the nasal mask and baseplate of the invention.
Fig. 3 shows a schematic configuration of the unidirectional aeration head of the present invention.
Fig. 4 shows a flow chart of a method for using the breath holding system in coordination with coronary CT imaging of the present invention.
Detailed Description
Referring to fig. 1, a coronary CT imaging breath-hold system according to an embodiment of the present invention includes: breath-hold detection device 1 and breath-hold execution device 2.
As a non-limiting embodiment, as shown in fig. 1, breath hold detection apparatus 1 includes: a processing terminal unit 11 and a breath detection unit 12. Processing terminal unit 11 is connected with the CT detector electricity, and breathing detecting element 12 and processing terminal unit 11 wireless communication are connected, and breathing detecting element 12 can gather the breathing oscillogram of examinee.
Breath-hold execution device 2 includes: a nose cup 21, a bottom plate 22 pivotally connected to the bottom of the nose cup 21 and sealing a cavity within the nose cup 21, and a control valve 23 controlling the bottom plate 22 to assume a closed or open state. Wherein, the control valve 23 is electrically connected with the processing terminal unit 11 of the breath-holding detection device 1, the bottom plate 22 is provided with two vent holes 221 corresponding to nostrils of a subject wearing the nose mask 21, as shown in fig. 3, a one-way vent head 222 extending towards the inner cavity of the nose mask is installed in each vent hole 221, a vent slit 223 with a width of about 1 mm is provided at the top of each one-way vent head 222, the one-way vent head 222 is in a cone frustum shape, and the vent slit 223 is provided at the top end of the cone frustum.
In another non-limiting embodiment, the processing terminal unit is electrically connected with the CT detector in a peripheral gating mode, the respiration oscillogram detected by the respiration detection unit is set to be a oscillogram of the respiration intensity along with the respiration time, and the respiration intensity is set to be the difference of the internal and external air pressure of the thoracic cavity.
In the invention, the nose cover, the bottom plate and the one-way ventilation head are all made of silica gel, and the arrangement of the silica gel material can prevent the skin of the examinee from being pressed to cause the skin of the examinee to be bruised or painful due to the long-time compression of the nose cover on the face of the examinee. Meanwhile, the bottom plate is made of silica gel, so that the bottom plate has good tightness to the skin of the outer ring of the nose of a patient in the compressing process. By using the soft elasticity of the silica gel, the unidirectional ventilation head can be ensured not to hurt the nostril of the examined person, and simultaneously the requirement on the hardness of the gas unidirectional passage can be met.
In order to facilitate the nose mask to cover the face of the examinee, the two sides of the nose mask can be provided with the elastic nose clips, so that the fixing effect of the nose mask is realized. The elastic bands can be connected to both sides of the nose mask, so that the nose mask can be fitted over the head of the examinee by fitting the elastic bands over the head of the examinee.
Thus, when using the breath hold system in accordance with the coronary CT imaging of the present invention, as shown in fig. 4, first, in step S1, the breath detection unit is tied to the abdomen of the subject, the breath hold detection device is activated, the processing terminal unit measures at least 10 groups of breathing oscillograms of the subject, and the average breathing intensity is obtained by averaging at least 10 groups of breathing oscillograms. Next, in step S2, the respiration detection unit is started to detect the respiration intensity of the subject and acquire a corresponding respiration intensity, and the processing terminal unit monitors the respiration wave intensity of the subject measured by the respiration detection unit in real time; finally, in step S3, when the real-time expiratory intensity satisfies the condition, the CT detector acquires a coronary CT image acquired in a corresponding cycle.
In yet another non-limiting embodiment, step S3 includes: (3-1) when the expiratory intensity is lower than the average respiratory intensity obtained in the step (1), the processing terminal unit instructs the CT detector to obtain the coronary CT images acquired in the corresponding period; and (3-2) when the expiratory intensity is higher than the average respiratory intensity obtained in the step S1, the processing terminal unit sends an instruction to a control valve of the breath holding execution device, after the bottom plate is closed, the real-time monitoring on the respiratory wave intensity of the examinee measured by the breath detection unit is continued, and when the expiratory intensity is lower than the average respiratory intensity obtained in the step S1, the processing terminal unit instructs the CT detector to obtain the coronary artery CT images obtained in the corresponding period.
Therefore, when the processing terminal unit detects that the examinee can achieve the breath-hold effect autonomously, the examinee does not need to carry out passive breath-holding operation. And when the person of being examined can't independently control and close the gas, just start the control valve of holding a breath final controlling element, seal the bottom plate in the bottom of nose cup for the nose cup forms inclosed cavity, when the person of being examined wants to exhale, the inside atmospheric pressure of cavity is greater than the internal pressure of one-way ventilation head, thereby the external pressure of one-way ventilation head presses the gas vent to closely laminating can't ventilate, makes the person of being examined can't exhale through the nostril. When the examinee needs to breathe in, the inside atmospheric pressure of cavity is less than the inside atmospheric pressure of one-way ventilation head, and the inside atmospheric pressure of one-way ventilation head backs down the crack and makes the air can circulate to make one-way ventilation head let the examinee's nostril can only breathe in unable expiration, reach the effect that lets the examinee hold the breath.
Although preferred embodiments of the present invention have been described in detail herein, it is to be understood that this invention is not limited to the precise construction herein shown and described in detail, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A breath hold system for coronary CT imaging comprising: a breath holding detection device electrically connected with the CT detector, and a breath holding execution device electrically connected with the breath holding detection device,
wherein, holding breath detection device includes: the CT detector comprises a processing terminal unit electrically connected with the CT detector and a respiration detection unit wirelessly connected with the processing terminal unit, wherein the respiration detection unit is used for acquiring a respiration oscillogram of a detected person;
the breath-hold execution device comprises: nose cup, pivotal connection in the bottom of nose cup and can seal the bottom plate and the control of cavity in the nose cup the bottom plate is the control valve of closed or open mode, wherein, the control valve with hold the screen gas detection device's processing terminal unit electricity is connected, two air vents, every have been seted up in the bottom plate in the nostril department corresponding to the person of the examined who wears the nose cup install the orientation in the air vent the one-way ventilation head that the nose cup inner chamber extends, the vent gap of width less than or equal to 1.5 millimeters is seted up at the top of every one-way ventilation head.
2. The breath hold system for coronary CT imaging of claim 1, wherein said processing terminal unit is electrically connected to said CT detector in a peripheral gated manner.
3. The breath hold system matched with coronary artery CT imaging according to claim 1, wherein the respiration wave form detected by the respiration detection unit is set as a wave form of respiration intensity along with respiration time, and the respiration intensity is set as the difference of the internal and external air pressure of the thoracic cavity.
4. The breath-hold system for coronary CT imaging of claim 1, wherein said one-way ventilation head has a truncated cone shape, and said ventilation slit is formed at the top end of the truncated cone.
5. The breath hold system for coronary CT imaging of claim 4, wherein said nasal mask, said base plate, and said one-way ventilation head are all made of silicone.
6. The breath hold system for coronary CT imaging of claim 5, wherein said nasal mask is provided with resilient nose clips on both sides for securing said nasal mask to the nose of the subject.
7. The breath hold system for coronary CT imaging of claim 5, wherein elastic bands are attached to both sides of said nasal mask.
8. The breath-holding system for coronary artery CT imaging according to any of claims 1 to 7, wherein the breath-holding performing device further comprises a pull wire for closing the base plate, a micro motor disposed on the nose mask and electrically connected to the control valve, and a wire spool driven by the micro motor, wherein one end of the pull wire is fixedly connected to the wire spool, and the other end of the pull wire is fixedly connected to the free end of the base plate.
9. A method of using the breath hold system in conjunction with coronary CT imaging as recited in any of claims 1-8, comprising:
(1) the respiration detection unit is tied to the abdomen of a testee, the breath holding detection device is started, the processing terminal unit detects at least 10 groups of respiration oscillograms of the testee, and the 10 groups of respiration oscillograms are subjected to average processing to obtain average respiration intensity;
(2) the processing terminal unit monitors the respiratory wave intensity of the examinee measured by the respiratory detection unit in real time; and
(3) and when the real-time expiratory intensity meets the condition, the CT detector acquires the coronary artery CT images acquired in the corresponding period.
10. A method of use as claimed in claim 9, comprising: the step (3) comprises the following steps:
(3-1) when the expiratory intensity is lower than the average respiratory intensity obtained in the step (1), the processing terminal unit instructs the CT detector to acquire a coronary CT image acquired in a corresponding period; and
(3-2) when the expiratory intensity is higher than the average respiratory intensity obtained in the step (1), the processing terminal unit sends an instruction to a control valve of the breath-holding execution device, after the bottom plate is closed, the real-time monitoring on the respiratory wave intensity of the examinee detected by the breath detection unit is continued, and until the expiratory intensity is lower than the average respiratory intensity obtained in the step (1), the processing terminal unit instructs the CT detector to obtain coronary artery CT images obtained in a corresponding period.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010533014.5A CN111820933A (en) | 2020-06-12 | 2020-06-12 | Breath holding system matched with coronary artery CT imaging and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010533014.5A CN111820933A (en) | 2020-06-12 | 2020-06-12 | Breath holding system matched with coronary artery CT imaging and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112755407A (en) * | 2021-01-08 | 2021-05-07 | 广东省中医院（广州中医药大学第二附属医院、广州中医药大学第二临床医学院、广东省中医药科学院） | Method and device for inhibiting CBCT imaging breathing motion artifacts based on deep inspiration screen |
-
2020
- 2020-06-12 CN CN202010533014.5A patent/CN111820933A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112755407A (en) * | 2021-01-08 | 2021-05-07 | 广东省中医院（广州中医药大学第二附属医院、广州中医药大学第二临床医学院、广东省中医药科学院） | Method and device for inhibiting CBCT imaging breathing motion artifacts based on deep inspiration screen |
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Application publication date: 20201027 |