CN101884536A - Respiration gate-controlled inflation system, inflation method and medical imaging equipment - Google Patents
Respiration gate-controlled inflation system, inflation method and medical imaging equipment Download PDFInfo
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- CN101884536A CN101884536A CN2009101069639A CN200910106963A CN101884536A CN 101884536 A CN101884536 A CN 101884536A CN 2009101069639 A CN2009101069639 A CN 2009101069639A CN 200910106963 A CN200910106963 A CN 200910106963A CN 101884536 A CN101884536 A CN 101884536A
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Abstract
The invention discloses a respiration gate-controlled inflation system, respiration gate-controlled inflation method and medical imaging equipment. The system comprises an air pump, a first controller, a first pressure sensor and an inflation passage, wherein the first controller is connected with the air pump, the air outlet of the air pump is communicated with one end of the inflation passage, and the other end of the inflation passage is used to be communicated with an air cell; and the first pressure sensor is arranged on the inflation passage, the output end of the first pressure sensor is coupled to the first controller which controls the air pump to stop inflating according to the pressure detected by the first pressure sensor, namely controlling the air pump to stop inflating when the pressure detected by the first pressure sensor reaches a second pressure value. The inflation system and the inflation method have the advantages that: medical care personnel do not have to inflate the air cell manually, and the working efficiency is improved; and as the reference pressure in the air cell is monitored and controlled, the output signal is optimized and the amplitude and accuracy of the signal are not seriously affected.
Description
[technical field]
The present invention relates to armarium, be specifically related to a kind of breath gate controlling system.
[background technology]
In some medical imaging equipment, its image is subjected to respirometric interference easily, as MRI (NMR (Nuclear Magnetic Resonance)-imaging), CT (computed tomography).Generally adopt the technology of respiration gate control to evade and compensate in the industry.
Respiratory gating technology is attached to by measurement generally that inflatable air bag changes with respirometric pressure on the human body, reaches to measure respirometric purpose.For example application number is a disclosed breath gate controlling system in 200810055806.5 the Chinese patent application.At present, the beginning inflation and stop inflation of air bag adopts artificial mode to control, and has been charged to required pressure when medical personnel rule of thumb judge, promptly stops inflation.The reference pressure of air bag in this inflation mode (i.e. the blowing pressure in the Yu She air bag) is not easy control, thereby influences the amplitude and the accuracy of signal.
[summary of the invention]
The main technical problem to be solved in the present invention is, a kind of respiration gate control gas charging system and inflation method are provided, can be more accurately with airbag aeration to preset pressure.
According to an aspect of the present invention, provide a kind of respiration gate control gas charging system, comprising: air pump, first controller, first pressure transducer and gas fill port; Described first controller links to each other with air pump, is used to control air pump and opens or stop; The gas outlet of described air pump is communicated with an end of gas fill port, and the other end of described gas fill port is used for being communicated with air bag; Described first pressure transducer is arranged on the gas fill port, and the outfan of described first pressure transducer is coupled to first controller, and described first controller stops inflation according to the pressure control air pump that first pressure transducer detects.
According to a further aspect in the invention, provide a kind of control method, comprising above-mentioned respiration gate control gas charging system:
First controller control air pump starts, and air bag is inflated;
First controller receives the pressure that first pressure transducer detects, and judge whether the pressure that first pressure transducer detects reaches second force value, stop inflation, the preset pressure value that described second force value need be charged to greater than described air bag if then control air pump.
Wherein, air bag being carried out aeration step comprises:
First controller begin to inflate back control air pump with first speed to airbag aeration, when the pressure of first pressure transducer detection reaches first force value, described first controller control air pump with second speed to airbag aeration, described second speed is less than first speed, and described first force value is less than described preset pressure value.
According to another aspect of the invention, provide a kind of medical imaging equipment, comprise above-mentioned respiration gate control gas charging system.
The invention has the beneficial effects as follows: by pressure transducer the pressure in the air bag is monitored, form the control system of a closed loop with air pump, thereby can inflate automatically air bag according to preset pressure value.The present invention compares with traditional manual inflation's method, makes the medical worker reduce one procedure, does not need air bag is manually inflated, and has improved work efficiency; And because the reference pressure in the air bag is monitored and controlled, can accomplish the optimization of output signal, the amplitude of signal and accuracy can be a greater impact.
[description of drawings]
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the flow chart of an embodiment of the present invention;
Fig. 3 is the structural representation of the another kind of embodiment of the present invention.
[specific embodiment]
In conjunction with the accompanying drawings the present invention is described in further detail below by the specific embodiment.
Please refer to Fig. 1, the respiration gate control gas charging system comprises air pump 12, first controller 13, first pressure transducer 14 and gas fill port 11.Air pump is used for to airbag aeration, and pressure transducer is used to measure intracapsular pressure, and air bag is attached to the human abdomen, and its intrinsic pressure can be along with the variation of respiratory movement generating period.Gas fill port 11 connection air pumps 12 and air bag 16, the first controllers 13 are as control system, and it links to each other with air pump 12, and control air pump 12 is opened or stopped.In one embodiment, first controller 13 is to air pump 12 output PWM ripples, and control air pump 12 is started working, and air pump 12 is inflated to air bag 16 by gas fill port 11.First controller 13 can recently be controlled the rotating speed of air pump 12 by the duty of PWM ripple, thus the control aeration speed.First pressure transducer 14 is arranged on the gas fill port 11, and the outfan of first pressure transducer 14 is coupled to first controller 13, and described first controller 13 stops inflation according to the pressure control air pump 12 that first pressure transducer 14 detects.
For being checked, patient finishes back system automatic deflation, in another embodiment, as shown in Figure 1, the respiration gate control gas charging system also comprises the first venting path 15, one end of the first venting path 15 is communicated with gas fill port 11, the first venting path 15 is provided with first electrodynamic valve, 17, the first controllers 13 and is coupled to first electrodynamic valve 17.Electrodynamic valve is as the air circuit breaker of venting, and when needs were exitted, first controller, 13 controls, first electrodynamic valve 17 was opened, and gas is emitted by the first venting path 15 and gas vent 151.
First controller constantly obtains pressure in the air bag, the action of control electrodynamic valve and air pump from the pressure transducer by A/D sampling.
In a kind of instantiation, gas fill port 11 comprises entire body 10, and entire body is used for the connection of gas circuit.First pressure transducer 14 is arranged on the entire body 10, and the first venting path 15 also is communicated with entire body 10.For example, air pump 12 is communicated with the interface 101 of entire body 10 by trachea, and interface 103, the first venting paths 15 that first pressure transducer 14 is communicated to entire body 10 are communicated to the interface 102 of entire body 10, and air bag 16 is communicated to the interface 104 of entire body 10.
The automatic inflation and the automatic deflation of breath gate controlling system have been realized by said system, detect the air pressure of air bag by pressure transducer, and testing result fed back to controller, when airbag aeration arrives predetermined pressure, controller may command air pump stops inflation, thereby can more accurately airbag aeration be arrived preset pressure.
When carrying out ventilating control by said system, pressure transducer is to carry out pressure detecting when gas flow, the pressure of synchronization is big slightly in the detected pressure ratio air bag, therefore need carry out suitable design to the pressure spot that air pump stops, in the present embodiment, the pressure spot that the setting air pump stops is second force value, promptly first controller control air pump when the pressure of first pressure transducer detection reaches second force value stops inflation, and second force value is a bit larger tham the preset pressure value that described air bag need be charged to, and for example second force value is the 105%-110% of described preset pressure value.Like this, after the control air pump stopped inflation, the pressure of the gas in the air bag can more approach preset pressure value.
Preset pressure value is the force value that the doctor should be charged to according to the final inflation of air bag of testing or experience is determined, when air bag is charged to preset pressure value, can make the image of the test point in the checking process fixing as far as possible.If it is many more that the final the blowing pressure of air bag departs from this preset pressure value to little direction, promptly to owe to fill big more, the signal amplitude that then obtains can be smaller, and the precision of images that records is not enough, and the test point in this cycle and following cycle also may be different.If it is many more that the final the blowing pressure of air bag departs from this preset pressure value to big direction, i.e. overshoot is big more, also can influence the detection of medical imaging.
The flow chart that carries out ventilating control by said system may further comprise the steps as shown in Figure 2:
In step S1, first controller receives the order of using respiration gate control, execution in step S2 after receiving order.
In step S2, first controller is controlled closeall electrodynamic valve, and the unlatching of control air pump, and air pump begins inflation to air bag.
In step S3, in the process of inflation, be arranged on the pressure of the first pressure transducer detected gas in the gas fill port, the gas pressure in this gas pressure reaction air bag.The result that first pressure transducer will detect outputs to first controller, and execution in step S4.
In step S4, the pressure threshold that the control air pump of pressure that first controller will detect in real time and setting stops (being the second above-mentioned force value) is compared, and when the pressure of real-time detection reached this pressure threshold, the control air pump stopped, then execution in step S5.
In step S5, system begins respiration measurement, carries out imaging.
In step S6, after imaging was finished, first controller was opened electrodynamic valve after receiving the gate shutdown command, bled off the gas in the air bag, turned to step S7 then, finished the measurement of respiration gate control.
When air bag is inflated, can adopt at the uniform velocity aeration to inflate, also can adopt the speed change aeration that air bag is inflated.First controller is to the work of air pump output PWM ripple control air pump, and the dutycycle that changes the PWM ripple can change the aeration speed of air pump.Be the gas replenishment process of example explanation controller control air pump to adopt the speed change inflation regime below.
Controller cuts out all electrodynamic valves after receiving the order of host computer use respiration gate control, opens air pump simultaneously, begins inflation.In the present embodiment, inflation is divided into three phases:
1) obtains the aeration speed stage.Inflate at full speed when just beginning, when intracapsular pressure begins to change, obtain aeration speed by sampling, promptly inflate the change value of pressure that certain hour brings, thereby calculate the time of second stage inflation, the computational methods of this time are as follows:
Second stage inflationtime=(first force value-current pressure value)/aeration speed;
Wherein, first force value is less than preset pressure value, and for example first force value is the 80%-90% of described preset pressure value, or about 95%.
2) full speed aeration phase, this stage air pump is inflated at full speed, and inflationtime is the time that calculates the phase I, makes the interior pressure of air bag reach first force value of setting.After the inflationtime of second stage finishes, carry out the inflation of phase III, reduce aeration speed.
3) aeration phase at a slow speed, the aeration speed in this stage is less than the aeration speed of second stage, constantly monitor the interior pressure of air bag by sampling simultaneously, when intracapsular pressure arrives second force value (bigger slightly than the preset pressure value that obtains by experiment and determine), then stop inflation.
Have certain time-delay because of between the stopping of the detection of pressure transducer and air pump, adopt inflation at a slow speed, can reduce the deviation of the air pressure and the preset value of air bag as far as possible.
Adopt the method for three graduated charges, not only guaranteed aeration speed, (controller detects intracapsular pressure and arrives threshold point in overshoot by having reduced intracapsular pressure as much as possible at second stage control inflationtime simultaneously, close air pump then and stop inflation, this process has a time difference, can cause having filled in the air bag more gas during this period of time, the detected actual pressure of pressure transducer can be bigger than threshold point when air pump cut out, this difference is overshoot), make pressure and the error between the preset pressure value in the final air bag less.
In other embodiments, also can adopt two graduated charge methods, that is:
1) full speed aeration phase, this stage has just begun to open inflation from air pump, carry out the full speed inflation, aeration speed is very fast, and pressure transducer detects the pressure variation of gas in the air bag simultaneously, and the force value of detection in real time and first force value of setting are constantly compared, when the pressure that detects reaches first force value of setting, change aeration speed, inflate at a slow speed, for example speed is 1/3 of inflation at full speed.
2) aeration phase at a slow speed, the aeration speed in this stage is slower, by the continuous pressure in the monitoring air bag of pressure transducer sampling, then stops inflation when intracapsular pressure arrives second force value (bigger slightly than the preset pressure value that obtains by experiment and determine) simultaneously.
Two graduated charge methods can reach the effect of three graduated charge methods equally.
For prevent that one tunnel ventilating control circuit from breaking down in gas replenishment process, in a further embodiment, the respiration gate control gas charging system also comprises the second road standby pressure-releasing control circuit, as shown in Figure 3, except comprising first controller 13, first pressure transducer 14 and the second venting path 15 are outside interior first via control circuit, also comprise second controller 23, second pressure transducer 24 and the second venting path 25 are at No. the second interior control circuit, described second pressure transducer 24 is arranged on the gas fill port 11, the outfan of described second pressure transducer 24 is coupled to second controller 23, the described second venting path 25 is provided with second electrodynamic valve 27, and described second controller 23 is coupled to second electrodynamic valve 27.
Under the normal condition, first controller 13 is according to the pressure of the air bag of first pressure transducer, 14 detections, control the action of the air pump and first electrodynamic valve 17, realize charging and discharging automatically the function of gas, second controller 23 then is when system's operate as normal second electrodynamic valve 27 to cut out, and guarantees the gas circuit operate as normal.When first via control circuit breaks down, such as can not detect the interior pressure of air bag, or in the process of air-pump inflating, can not close air pump at the preset pressure value point, this moment, air pump continued inflation.For preventing that the air bag overshoot is too many or damaging, second controller 23 can be the 3rd force value greater than second force value (for example the 3rd force value be a pressure spot of 1.5 times of second force value), open second electrodynamic valve 27, make the pressure of air bag exit by the second venting path 25 and venting outlet 251, thereby make the pressure in the air bag can be too not high, can not bring sense of discomfort or damage patient.
As shown in Figure 3, in a kind of concrete connected mode, the connection of each assembly is to be the center with entire body 10, the inflation inlet of air pump 12 is connected to the QI KOU 101 of entire body by trachea, QI KOU 103, the second electrodynamic valves 27 that QI KOU 102, the first pressure transducers 14 that first electrodynamic valve 17 is connected to entire body are connected to entire body are connected to the QI KOU 104 of entire body, second pressure transducer 24 is connected to the QI KOU 105 of entire body, and 106 of the gas outlets of entire body are connected to air bag 16.Two pressure transducers, two electrodynamic valves and air pump all link to each other with control system, control system can be monitored, with the action of control pump valve by pressure transducer to gasbag pressure.
Present embodiment adopts the pressure in the two-way control circuit monitoring air bag; and control system use two independently controller circuitry detect gasbag pressure respectively; control two electrodynamic valves respectively; adopt duplicate protection; promptly wherein one the road when breaking down; over-voltage protecting function can be realized equally in another road, thereby has guaranteed to charge and discharge automatically the safety of gas, has realized the function of dual overvoltage protection.
The foregoing description can be used for the gas charging system in the medical imaging equipment, and its air bag is inflated.Medical imaging equipment can be MRI equipment or CT equipment.
Above content be in conjunction with concrete embodiment to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a respiration gate control gas charging system is characterized in that comprising: air pump, first controller, first pressure transducer and gas fill port; Described first controller links to each other with air pump, is used to control air pump and opens or stop; The gas outlet of described air pump is communicated with an end of gas fill port, and the other end of described gas fill port is used for being communicated with air bag; Described first pressure transducer is arranged on the gas fill port, and the outfan of described first pressure transducer is coupled to first controller, and described first controller stops inflation according to the pressure control air pump that first pressure transducer detects.
2. the system as claimed in claim 1 is characterized in that, the control air pump stopped inflation, the preset pressure value that described second force value need be charged to greater than described air bag when the pressure that described first controller detects at first pressure transducer reached second force value.
3. system as claimed in claim 2, it is characterized in that, described first controller begin to inflate back control air pump with first speed to airbag aeration, when the pressure of first pressure transducer detection reaches first force value, described first controller control air pump with second speed to airbag aeration, described second speed is less than first speed, and described first force value is less than described preset pressure value.
4. system as claimed in claim 3 is characterized in that, also comprises the first venting path, and an end of the described first venting path is communicated with described gas fill port.
5. system as claimed in claim 4 is characterized in that, the described first venting path is provided with first electrodynamic valve, and described first controller is coupled to first electrodynamic valve.
6. system as claimed in claim 5 is characterized in that described gas fill port comprises entire body, and described first pressure transducer is arranged on the entire body, and the described first venting path is communicated with entire body.
7. as each described system in the claim 1 to 6, it is characterized in that, also comprise second controller, second pressure transducer and the second venting path, described second pressure transducer is arranged on the gas fill port, the outfan of described second pressure transducer is coupled to second controller, the described second venting path is provided with second electrodynamic valve, described second controller is coupled to second electrodynamic valve, when the pressure that described second controller detects at second pressure transducer reaches the 3rd force value, control second electrodynamic valve and open venting, described the 3rd force value is greater than second force value.
8. the inflation method of each described respiration gate control gas charging system in the claim 1 to 7 is characterized in that, described method comprises:
First controller control air pump starts, and air bag is inflated;
First controller receives the pressure that first pressure transducer detects, and judge whether the pressure that first pressure transducer detects reaches second force value, stop inflation, the preset pressure value that described second force value need be charged to greater than described air bag if then control air pump.
9. method as claimed in claim 8, it is characterized in that, describedly air bag carried out aeration step comprise: first controller begin to inflate back control air pump with first speed to airbag aeration, when the pressure of first pressure transducer detection reaches first force value, described first controller control air pump with second speed to airbag aeration, described second speed is less than first speed, and described first force value is less than described preset pressure value.
10. a medical imaging equipment is characterized in that, comprises each described respiration gate control gas charging system in the claim 1 to 7.
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| CN2009101069639A CN101884536B (en) | 2009-05-14 | 2009-05-14 | Respiration gate-controlled inflation system, inflation method and medical imaging equipment |
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| CN2009101069639A CN101884536B (en) | 2009-05-14 | 2009-05-14 | Respiration gate-controlled inflation system, inflation method and medical imaging equipment |
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| CN103157206A (en) * | 2012-09-05 | 2013-06-19 | 上海宝亚安全装备有限公司 | Filter device and breathing system with filter device |
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| JP3017569B2 (en) * | 1991-05-30 | 2000-03-13 | 松下電工株式会社 | Air massage control method |
| US5681339A (en) * | 1996-08-12 | 1997-10-28 | Mcewen; James A. | Apparatus and method for monitoring the patency of tubing in a pneumatic medical device |
| US5968073A (en) * | 1997-11-17 | 1999-10-19 | Jacobs; Laura F. | Methods and apparatus for applying pressure |
| CN101191830A (en) * | 2006-11-29 | 2008-06-04 | 北京万东医疗装备股份有限公司 | Respiration /ECG gated apparatus for magnetic resonance image-forming system |
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| WO2015081589A1 (en) * | 2013-12-06 | 2015-06-11 | 刘苗生 | Inflatable vest capable of monitoring and controlling amplitude and phase of respiratory motion |
| CN104473748A (en) * | 2014-11-28 | 2015-04-01 | 厦门蒙发利科技（集团）股份有限公司 | Adaptive massage method of massager |
| CN107152985A (en) * | 2017-05-04 | 2017-09-12 | 明达实业(厦门)有限公司 | The pressure measxurement control device and its pressure measxurement control method of a kind of air bag |
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| CN110464962A (en) * | 2019-07-24 | 2019-11-19 | 喜临门家具股份有限公司 | Control method, device, bedding air bag, electronic equipment and the storage medium of air bag |
| CN110464962B (en) * | 2019-07-24 | 2021-09-24 | 喜临门家具股份有限公司 | Airbag control method, device, bedding airbag, electronic device, and storage medium |
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