CN200976043Y - Breath/heart switch control equipment for magnetic resonance image system - Google Patents
Breath/heart switch control equipment for magnetic resonance image system Download PDFInfo
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- CN200976043Y CN200976043Y CN 200620158618 CN200620158618U CN200976043Y CN 200976043 Y CN200976043 Y CN 200976043Y CN 200620158618 CN200620158618 CN 200620158618 CN 200620158618 U CN200620158618 U CN 200620158618U CN 200976043 Y CN200976043 Y CN 200976043Y
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- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 230000003993 interaction Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
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- 230000028016 temperature homeostasis Effects 0.000 description 1
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Abstract
The utility model relates to a respiratory or cardiac gated control equipment for the magnetic resonance imaging system involving magnetic resonance imaging technology, wherein the information processing system is an embedded systems with a single-chip microcomputer for the core processing; the breath gathered by sensor and the electrocardiogram signals is sent to the single-chip microcomputer for processing after enlarged and analog-digital conversion while also be sent to the computer via serial port. The necessary information can be displayed on the computer screen and the threshold can be set in interactive way. The computer can return the set threshold information via serial port to equipment. The single-chip microcomputer generates and sends the gate signal namely control plus which can be used in the processing of serial based on the threshold information to the spectrometer. The utility model has the advantages of simpleness, agility, credibility and low cost; the utility model guarantees real-time signal acquisition and the accuracy of magnetic resonance, also brings the clear imaging for the magnetic resonance imaging system.
Description
Technical field
The utility model relates to the breathing/ecg-gating equipment of magnetic resonance imaging system special use, promptly relates to a kind of equipment that improves picture quality by the rhythm and pace of moving things of gathering human body respiration and heartbeat with the sequence in the control imaging system working time.
Background technology
In magnetic resonance imaging system, produce motion artifacts when making system imaging at present, so that reduce the resolution and the signal to noise ratio (S/N ratio) of image owing to human body respiration, heartbeat etc.For improving the magnetic resonance image (MRI) quality, need a kind of working time that can control imaging sequence in the magnetic resonance imaging system, make it and the breathing of human body, the identical equipment of eliminating motion artifacts of the rhythm and pace of moving things of heartbeat.A kind of equipment that breathing/ecg-gating comes to this.
Common breathing/ecg-gating equipment mainly contained sensor-type two types of electric pole type and temperature-sensitive on the market in the past.Electric pole type respiration gate control equipment is electrocardiograph common in the present hospital, and its structure mainly comprises three parts, is respectively input circuit, amplifying circuit and writing circuit.Input circuit comprises overvoltage protection, High frequency filter, buffer amplifier, the inferior network of Weir and the selection circuit that leads.Amplifying circuit comprises that prime is amplified, intergrade is amplified and power amplification circuit.Writing circuit mainly is made up of paper driving unit speed governing, speed-stabilizing circuit, recording pointer thermoregulation circuit, register.It adopts a plurality of electrodes to place the different parts of human body to gather a plurality of signals simultaneously, obtain after treatment breathing and electrocardiosignal figure, it has measures accurately, characteristics such as the signal that presents is better, but it costs an arm and a leg, and volume is bigger, the circuit structure complexity, be not suitable for for the supporting use of magnetic resonance imaging system, and have weak points such as the acquired signal flow process is loaded down with trivial details.The sensor-type respiration gate control of temperature-sensitive, its structure and electrocardiograph are basic identical, same complex structure, it places heat sensitive sensor at people's breathing position, the breath signal of gathering human body produces gate-control signal with the control imaging sequence, but operating personnel are difficult to according to different patients' situation the time of origin that thresholding comes gating pulse is set, and are easy to generate cross-infection, have the high shortcoming of cost equally.
The utility model content
The purpose of this utility model is to provide that a kind of to be suitable for magnetic resonance imaging system matching used, simple, flexibly, the reliable breathing of easy operating/ecg-gating equipment again, to improve the image quality of magnetic resonance imaging system.
For achieving the above object, technical solution of the present utility model provides a kind of breathing/ecg-gating equipment that is used for magnetic resonance imaging system, comprises input circuit, amplifying circuit and information handling system; It is the embedded system of handling core with the single-chip microcomputer that its information handling system is one;
The breathing of sensor acquisition, electrocardiosignal are handled through importing in the single-chip microcomputer after amplification, the analog to digital conversion, breathing, electrocardiosignal after single-chip microcomputer will be handled are simultaneously sent into computing machine through serial ports, the information of necessity is presented on the computer screen, set thresholding by interactive means, computing machine passes through the serial ports Returning equipment again with the threshold information that configures, it is gating pulse that single-chip microcomputer moves needed gate-control signal according to threshold information generation sequence, delivers to spectrometer.
Described breathing/ecg-gating equipment, its described sensor order is electrically connected with single-chip microcomputer through gain control circuit, amplifying circuit, analog to digital converter; Or order is electrically connected with single-chip microcomputer through another amplifying circuit, analog to digital converter;
Single-chip microcomputer intercoms with computing machine mutually by serial ports;
Another output terminal of single-chip microcomputer is electrically connected with the TRIG mouth of the spectrometer of magnetic resonance imaging system.
Described breathing/ecg-gating equipment, its described single-chip microcomputer is the AT89C52 single-chip microcomputer, adopts the MAX810 chip that resets; Sensor is voltage sensitive sensor or the baroceptor that is connected with waistband and air bag; Serial ports is the MAX232 serial ports.
Described breathing/ecg-gating equipment, its described gain control circuit is the AD620 gain control circuit; Two amplifying circuits are the LM358 amplifying circuit; Analog to digital converter is the ADC0848 analog to digital converter.
Described breathing/ecg-gating equipment, its described baroceptor order that is connected with waistband and air bag is electrically connected with single-chip microcomputer through gain control circuit, amplifying circuit, analog to digital converter; The voltage sensitive sensor order is electrically connected with single-chip microcomputer through another amplifying circuit, analog to digital converter.
Described breathing/ecg-gating equipment, its described information handling system comprises single-chip microcomputer, serial ports and two relay indicating lights, in two relay indicating lights, a reset situation pilot lamp, a single-chip microcomputer operation conditions pilot lamp.
The man-machine interaction method of a kind of described breathing/ecg-gating equipment, its described computer terminal, the tester obtains test interface according to testing software on computer screen, the curve that shows three kinds of different colours on the test interface, one is that signal curve, is threshold value line, a gate-control signal line for the control imaging sequence;
When the tester sees the not fogging clear of imaging system acquisition or has motion artifacts, threshold value rule of thumb manually is set, promptly change the position of testing software interface upper threshold line, set suitable threshold value;
At this moment, the information that computing machine will artificially be set threshold value returns to the microcontroller embedded system of AT89C52, the AT89C52 scm managing system is exported corresponding gate-control signal according to the threshold value of setting, be a series of pulses, give spectrometer, to control its imaging sequence working time, obtain distinct image.
The man-machine interaction method of described breathing/ecg-gating equipment, the formation of its described pulse, when beginning to test, system carries out initial setting by default value, sets the initial threshold value, and beginning acquired signal, the microcontroller embedded system of AT89C52 will gather the signal and the threshold value of coming and compare, if signal is higher than threshold value, then system exports high level, otherwise output low level, the high-low level of output this moment are control imaging sequence gate-control signal---the pulse train of working time;
Pulse train control magnetic resonance imaging system imaging sequence working time, there is not pseudo-shadow if imaging is clear, then allow system continue operate as normal, if imaging is unintelligible or have a motion artifacts, then artificially reset threshold value on computers, produce new gate sequence, up to clear picture, not have motion artifacts till.
The utility model has important practical sense on the picture quality that improves magnetic resonance imaging.As, employing breathing/ecg-gating can significantly be eliminated the motion artifacts in the system imaging, effectively improve image resolution ratio and signal to noise ratio (S/N ratio), simultaneously, breathing/ecg-gating system all has crucial effects to the realization and the improvement of senior magnetic resonance imaging functions such as angiogram, the imaging of pancreatic duct water and cine cardiac imaging technology.
From the above mentioned, compare with traditional technology, the utility model has following technical advance:
A) adopt high-speed microprocessor control, guarantee the real-time and the accuracy of signals collecting;
B) export visual breathing and ecg wave form in real time, be convenient to monitoring the measured;
C) simple, flexible, the reliability height is convenient to manually-operated;
D) the total system volume is little, cost is low, is convenient to production, installation and maintenance.
Description of drawings
Fig. 1 is the utility model breathing/ecg-gating equipment and baroceptor and the waistband connection layout of gathering the human body respiration signal;
Fig. 2 is the connection layout of the utility model breathing/ecg-gating equipment with the voltage sensitive sensor of gathering human ecg signal;
Fig. 3 is the utility model breathing/ecg-gating device interior circuit logic diagram;
Fig. 4 is the utility model breathing/ecg-gating equipment work process flow diagram---man-machine interaction shop drawing;
Fig. 5 is the small disposal system internal processes of the utility model breathing/ecg-gating device A T89C52 workflow diagram;
The breath signal curve map that Fig. 6 obtains for the utility model breathing/ecg-gating equipment;
The electrocardiosignal curve map that Fig. 7 obtains for the utility model breathing/ecg-gating equipment.
Embodiment
Breathing of the present utility model/ecg-gating equipment is used for magnetic resonance imaging system, and its simple, flexible, dependable performance can be eliminated the motion artifacts in the magnetic resonance imaging, improve picture quality.It is one serves as the embedded system of handling core with the AT89C52 single-chip microcomputer, breathing with sensor acquisition, electrocardiosignal is through amplifying, import in the single-chip microcomputer after the analog to digital conversion and handle, breathing after single-chip microcomputer will be handled simultaneously, electrocardiosignal is sent into computing machine through the RS-232 serial ports, the information of necessity is presented on the computer screen, set thresholding by interactive means, computing machine passes through RS-232 serial ports Returning equipment with the threshold information that configures, it is gating pulse that single-chip microcomputer moves needed gate-control signal according to threshold information generation sequence, delivers to spectrometer.
The AT89C52 SCM peripheral of the utility model core has two paths of signals amplifying circuit, an A/D converter, and a serial port circuit, and they have formed the main body of breathing/ecg-gating jointly.Wherein, amplifying circuit one tunnel is the breath signal amplifying circuit, it is made up of two-stage circuit, previous stage is input as differential signal by the gain control stages that AD620 constitutes, and is output as corresponding gain control signal, back one-level is the amplifying circuit that LM358 constitutes, wherein LM358 is the double operational chip, and incoming level that can the back amplifier of corresponding as required raising improves the current potential of output signal.Another Lu Zewei electrocardiosignal amplifying circuit, mainly the one-level amplifying circuit that constitutes by LM358.A/D converter then mainly is made of chip ADC0848, the main digital signal of being responsible for the analog signal conversion of sending here is become eight outputs, eight digit number word signal is delivered to the core of breathing/ecg-gating equipment through data bus---the embedded system that AT89C52 forms, wherein single-chip microcomputer adopts the MAX810 chip that resets to carry out electrification reset, in embedded system, also include two relay indicating lights and serial ports coupling part, wherein red led can judge accurately whether AT89C52 resets, whether normally green indicating lamp then shows the operation of single-chip microcomputer internal processes, serial ports adopts the MAX232 serial port chip to connect, give spectrometer in computing machine and the magnetic resonance imaging system respectively with the information after handling, and in computing machine, show the waveform of the signal that is collected.
Deficiency at aspects such as existing equipment cost height, man-machine interaction differences, breathing of the present utility model/ecg-gating equipment is connected with corresponding sensor, sensor is used to survey the breath signal of human body, also gather the electrocardiosignal of human body simultaneously, equipment is connected with the spectrometer of magnetic resonance imaging system, it sends corresponding pulse signal to spectrometer after the human body respiration, the electrocardiosignal that detect are handled in real time, with the working time of control imaging sequence.The equipment electronic system by single-chip microcomputer control, signals collecting and pulse generation, adopt interactive means to carry out the threshold setting operation, it is best that the picture quality that imaging system is obtained reaches, the outstanding feature that this also can demonstrate fully intellectuality of the present utility model, hommization has embodied the theory of " people is at loop ".
The utility model equipment has simply, flexibly, reliable, characteristics such as cost is low, be applicable to all magnetic resonance imaging systems, can effectively reduce the motion artifacts that in the human body imaging process, causes by respiratory movement, heartbeat etc.
Followingly preferred embodiment is described in detail, will makes the utility model more clear for the structure and the characteristics of the breathing/ecg-gating equipment of the supporting special use of magnetic resonance imaging system with reference to accompanying drawing.
1, describe with reference to the accompanying drawings below realize the utility model in the breathing/ecg-gating equipment of the supporting special use of magnetic resonance imaging system about the embodiment of breath signal.
Fig. 1 is breathing/ecg-gating equipment and baroceptor and waistband connection layout, baroceptor is gathered breath signal, produce different differential signals and signal is sent into the gain control circuit shown in the accompanying drawing 3 according to human body respiration, the differential signal that the AD620 gain control circuit is sent here according to sensor is exported corresponding gain control signal, and the amplifying circuit that one-level is made of LM358 after sending into carries out the signal amplification, breath signal is delivered to A/D converter ADC0848 after amplifying, send into the embedded system of AT89C52 single-chip microcomputer through A/D converter output eight digit number word signal, signal after will handling is at last sent into computing machine and spectrometer through serial ports MAX232, as shown in Figure 4.
Fig. 4 is a breathing/ecg-gating workflow diagram---man-machine interaction shop drawing, and the synoptic diagram that is connected with spectrometer in the magnetic resonance imaging system.Wherein the signal port of electronic equipment links to each other with the sensor of acquired signal, and the breathing and the electrocardiosignal of the human body that collects are delivered to electronic equipment.The computer port of electronic equipment links to each other with PC, and operator's (also being the tester) only needs just can carry out real-time operation and monitoring on computers like this.At first, electronic equipment is delivered to PC after treatment with the signal that collects, and the operator can see the signal waveform of being gathered on PC, and sets threshold value as required, the information that to set thresholding simultaneously turns back to electronic equipment, makes it to produce required pulse working time of control imaging sequence.The pulse port of electronic equipment is connected with the TRIG mouth of spectrometer in the magnetic resonance imaging system, and spectrometer is delivered in pulse, with the control imaging sequence.
The tester obtains the breath signal curve map according to testing software on computers, as shown in Figure 6.Wherein, three kinds of curves are arranged on the test interface, line 1 (interface display is green) is threshold value line (can artificially set as required) for the measured's of acquisition breath signal curve, line 2 (interface display is for red), and line 3 (interface display is yellow) is the gate-control signal of control imaging sequence.When the operator sees the not fogging clear of imaging system acquisition or has motion artifacts, threshold value can rule of thumb manually be set, promptly change reach the standard grade 2 position, testing software interface, set suitable threshold value, at this moment, the information that computing machine will artificially be set threshold value returns to the microcontroller embedded system of AT89C52, the AT89C52 scm managing system is exported corresponding gate-control signal according to the threshold value of setting, be that a series of pulses are given spectrometer to control its imaging sequence working time, obtain distinct image.Wherein the forming process of pulse as shown in Figure 5, when beginning to test, system carries out initial setting by default value, set the initial threshold value, and begin to gather breath signal, the AT89C52 embedded system will be gathered the breath signal and the threshold value of coming and be compared, if breath signal is higher than threshold value, then system exports high level, otherwise output low level, the high-low level of this moment output are control imaging sequence gate-control signal---the pulse train of working time, pulse train control system imaging sequence working time, there is not pseudo-shadow if imaging is clear, then allow system continue operate as normal,, then can artificially reset threshold value on computers if imaging is unintelligible or have motion artifacts, produce new gate sequence, up to clear picture, do not exist till the motion artifacts.
2, describe with reference to the accompanying drawings below realize the utility model in the breathing/ecg-gating equipment of the supporting special use of magnetic resonance imaging system about the embodiment of electrocardiosignal.
More than two embodiment, simple at outstanding the utility model, flexibly, outside the reliable characteristics, also embodied a kind of like this theory of " man-machine interaction, the people is at loop ", more given prominence to advantage of the present utility model place.
Claims (5)
1, a kind of breathing/ecg-gating equipment that is used for magnetic resonance imaging system comprises input circuit, amplifying circuit and information handling system; It is characterized in that it is the embedded system of handling core with the single-chip microcomputer that information handling system is one;
Input circuit and amplifying circuit comprise sensor, gain control circuit, amplifying circuit, analog to digital converter;
The sensor order is electrically connected with single-chip microcomputer through gain control circuit, amplifying circuit, analog to digital converter; Or order is electrically connected with single-chip microcomputer through another amplifying circuit, analog to digital converter;
Single-chip microcomputer intercoms with computing machine mutually by serial ports;
Another output terminal of single-chip microcomputer is electrically connected with the TRIG mouth of the spectrometer of magnetic resonance imaging system.
2, breathing as claimed in claim 1/ecg-gating equipment is characterized in that, described single-chip microcomputer is the AT89C52 single-chip microcomputer, adopts the MAX810 chip that resets; Sensor is voltage sensitive sensor or the baroceptor that is connected with waistband and air bag; Serial ports is the MAX232 serial ports.
3, breathing as claimed in claim 1/ecg-gating equipment is characterized in that, described gain control circuit is the AD620 gain control circuit; Two amplifying circuits are the LM358 amplifying circuit; Analog to digital converter is the ADC0848 analog to digital converter.
4, breathing as claimed in claim 2/ecg-gating equipment is characterized in that, the described baroceptor order that is connected with waistband and air bag is electrically connected with single-chip microcomputer through gain control circuit, amplifying circuit, analog to digital converter; The voltage sensitive sensor order is electrically connected with single-chip microcomputer through another amplifying circuit, analog to digital converter.
5, breathing as claimed in claim 1/ecg-gating equipment is characterized in that, described information handling system, comprise single-chip microcomputer, serial ports and two relay indicating lights, in two relay indicating lights, a reset situation pilot lamp, a single-chip microcomputer operation conditions pilot lamp.
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| CN 200620158618 CN200976043Y (en) | 2006-11-29 | 2006-11-29 | Breath/heart switch control equipment for magnetic resonance image system |
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| CN 200620158618 CN200976043Y (en) | 2006-11-29 | 2006-11-29 | Breath/heart switch control equipment for magnetic resonance image system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102525459A (en) * | 2010-12-28 | 2012-07-04 | 深圳迈瑞生物医疗电子股份有限公司 | Magnetic resonance imaging gate control system, method and magnetic resonance imaging device |
| CN104287769A (en) * | 2014-10-13 | 2015-01-21 | 沈阳东软医疗系统有限公司 | PET/CT (positron emission tomography / computed tomography) equipment-based exterior gating signal detecting device and method |
| CN106510665A (en) * | 2016-12-08 | 2017-03-22 | 浙江伽奈维医疗科技有限公司 | Wearable remote respiratory gating system for puncture and software design method of wearable remote respiratory gating system |
| CN106539584A (en) * | 2015-09-22 | 2017-03-29 | 上海联影医疗科技有限公司 | MR imaging method and system |
| CN109917315A (en) * | 2019-04-30 | 2019-06-21 | 上海联影医疗科技有限公司 | MRI scan method, apparatus, computer equipment and storage medium |
-
2006
- 2006-11-29 CN CN 200620158618 patent/CN200976043Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102525459A (en) * | 2010-12-28 | 2012-07-04 | 深圳迈瑞生物医疗电子股份有限公司 | Magnetic resonance imaging gate control system, method and magnetic resonance imaging device |
| CN104287769A (en) * | 2014-10-13 | 2015-01-21 | 沈阳东软医疗系统有限公司 | PET/CT (positron emission tomography / computed tomography) equipment-based exterior gating signal detecting device and method |
| CN104287769B (en) * | 2014-10-13 | 2016-10-05 | 沈阳东软医疗系统有限公司 | A kind of outside gate signal supervisory instrument based on PET/CT equipment and method |
| CN106539584A (en) * | 2015-09-22 | 2017-03-29 | 上海联影医疗科技有限公司 | MR imaging method and system |
| CN106539584B (en) * | 2015-09-22 | 2020-08-04 | 上海联影医疗科技有限公司 | Magnetic resonance imaging method and system |
| CN106510665A (en) * | 2016-12-08 | 2017-03-22 | 浙江伽奈维医疗科技有限公司 | Wearable remote respiratory gating system for puncture and software design method of wearable remote respiratory gating system |
| CN109917315A (en) * | 2019-04-30 | 2019-06-21 | 上海联影医疗科技有限公司 | MRI scan method, apparatus, computer equipment and storage medium |
| CN109917315B (en) * | 2019-04-30 | 2021-09-28 | 上海联影医疗科技股份有限公司 | Magnetic resonance imaging scanning method, magnetic resonance imaging scanning device, computer equipment and storage medium |
| US11774534B2 (en) | 2019-04-30 | 2023-10-03 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for magnetic resonance imaging |
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| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA RESOURCES WANDONG MEDICAL EQUIPMENT CO., LTD Free format text: FORMER NAME: BEIJING WANDONG MEDICAL EQUIPMENT CO., LTD.;BEIJING UNIVERSITY |
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| CP03 | Change of name, title or address |
Address after: 100015, No. 3, building 9, Jiuxianqiao East Road, Beijing, Chaoyang District Co-patentee after: Peking University Patentee after: Huarun Wandong Medical Equipment Co., Ltd. Address before: 100022, Beijing, Chaoyang District, 6 homes outside the founding of Lang Lang Co-patentee before: Peking University Patentee before: Beijing Wandong Medical Equipment Co., Ltd. |
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