CN107184227A - CT bulbs diagnostic method and CT system - Google Patents
CT bulbs diagnostic method and CT system Download PDFInfo
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- CN107184227A CN107184227A CN201710519562.0A CN201710519562A CN107184227A CN 107184227 A CN107184227 A CN 107184227A CN 201710519562 A CN201710519562 A CN 201710519562A CN 107184227 A CN107184227 A CN 107184227A
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- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 16
- 238000001228 spectrum Methods 0.000 claims abstract description 41
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- 238000012545 processing Methods 0.000 claims description 21
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- 238000012360 testing method Methods 0.000 claims description 5
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- 238000002591 computed tomography Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002059 diagnostic imaging Methods 0.000 description 2
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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]
- A61B6/032—Transmission computed tomography [CT]
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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
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4411—Constructional features of apparatus for radiation diagnosis the apparatus being modular
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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
- A61B6/58—Testing, adjusting or calibrating thereof
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Abstract
The invention discloses a kind of CT bulbs diagnostic method and CT system；Methods described includes：Air data is obtained from CT system, the CT system includes CT bulbs and detector, and the air data refers under the cavity state of the CT system, the response signal data for the X-ray that the detector is detected；The air data is transformed from the time domain into frequency domain, to obtain the corresponding frequency spectrum of the air data；And according to the corresponding frequency spectrum of the air data, determine the working condition of CT bulbs.The working condition of CT bulbs is diagnosed using the spectrum signature based on Air correction data, diagnosis efficiency and reliability, reduction diagnosis difficulty can be improved, is a kind of simple and effective method.
Description
Technical field
The present invention relates to field of medical technology, more particularly to a kind of CT bulbs diagnostic method and CT system.
Background technology
Computer tomography equipment (Computed Tomography, CT) is the conventional diagnostic imaging equipment of hospital.CT
The operation principle of machine may be summarized to be：Using X-ray bulb as x-ray source, the negative electrode of bulb is produced under high-voltage filament effect
Electron beam, accelerates electronics, the anode target surface that high-velocity electrons hit bulb produces X-ray, and then enters using X-ray under strong electric field
Row scanning imagery is to realize diagnostic imaging.Wherein, during bulb produces X-ray, the plate target of bulb is with certain speed
High speed rotation is carried out, once exception or failure occurs in plate target, plate target rotary speed may be caused to change or unstable
It is fixed, so as to have influence on bulb and the normal of whole CT machines is used.
Conventionally, as bulb is vacuum device complicated, that manufacture is accurate, the diagnosis of bulb and safeguard past
Toward research tool and means is limited to, rely primarily on the experience of technician to diagnose bulb, diagnosis efficiency is low
Under, it is impossible to find that bulb is abnormal in time.It is therefore desirable to study a kind of simple and effective bulb diagnostic method to help engineering
Teacher safeguards to CT bulbs, to ensure the normal work of CT machines.
The content of the invention
Asking for CT bulb working conditions can not be timely and effectively diagnosed for what prior art existed when diagnosing CT bulbs
Topic, it is an object of the invention to provide a kind of CT bulbs diagnostic method and CT system, this method is based on Air correction data to CT
Bulb plate target rotation status is diagnosed, and can improve diagnosis efficiency and reliability, reduction diagnosis difficulty, be it is a kind of simple and
Effective method.
To achieve the above object of the invention, the technical scheme that the present invention is provided is as follows：
On the one hand, the embodiments of the invention provide a kind of CT bulbs diagnostic method, methods described includes：Obtained from CT system
Air data, the CT system includes the CT bulbs and detector, and the air data refers to the cavity in the CT system
Under state, the response signal data for the X-ray that the detector is detected；The air data is transformed from the time domain into frequency domain,
To obtain the corresponding frequency spectrum of the air data；And according to the corresponding frequency spectrum of the air data, determine the work of CT bulbs
State.
In the present invention, the cavity state of the CT system refers to the light path between the CT bulbs and the detector
On do not place test object or obstructing objects.
In the present invention, it is described the air data is transformed from the time domain into frequency domain to include：The air data is carried out
Fast Fourier Transform (FFT) so that the air data transforms from the time domain to frequency domain.
In the present invention, it is described to determine that the working condition of CT bulbs includes according to the corresponding frequency spectrum of the air data：Root
The corresponding specific frequency of plate target rotary speed of the CT bulbs is determined according to the model of the CT bulbs；Recognize the frequency spectrum
Characteristic peak；And if it is judged that the characteristic peak deviate from the specific frequency, it is determined that the plate target rotation of the CT bulbs
Turn control and exception occur.
In the present invention, it is described to determine that the working condition of CT bulbs is further wrapped according to the corresponding frequency spectrum of the air data
Include：If it is judged that the characteristic peak is without departing from the specific frequency, it is determined that the plate target rotation control of the CT bulbs is not
Occur abnormal.
In the present invention, the characteristic peak includes the fundamental frequency peak and frequency multiplication peak of the frequency spectrum.
On the other hand, the embodiments of the invention provide a kind of CT system, the system includes：CT bulbs, the CT bulbs
For launching X-ray；Detector, the detector is used to detect air data；Data acquisition unit, the data acquisition unit
For gathering the air data；And data processing unit, the data processing unit according to the air data for examining
The working condition of the disconnected CT bulbs.
In the present invention, the system further comprises：Information display unit, described information display unit is used to show institute
State the diagnostic result of air data or CT bulbs.
In the present invention, the air data be under the cavity state of the CT system, what the detector was detected
The response signal data of the X-ray.
In the present invention, the data processing unit is used for：Fast Fourier Transform (FFT) is carried out to the air data, with
To the corresponding frequency spectrum of the air data；The plate target rotary speed pair of the CT bulbs is determined according to the model of the CT bulbs
The specific frequency answered；Recognize the characteristic peak of the frequency spectrum；If it is judged that the characteristic peak deviate from the specific frequency, then really
The plate target rotation control of the fixed CT bulbs occurs abnormal；And if it is judged that the characteristic peak is without departing from the specific frequency
Rate, it is determined that the plate target rotation control of the CT bulbs does not occur exception.
Compared with prior art, beneficial effects of the present invention performance is as follows：
First, the diagnosis to CT bulb plate target rotation status is realized using Air correction data, Air correction data are held
Easily obtain, this method is easy and effective, technician can be helped to improve operating efficiency in M R CT machines, so as to have
Effect avoids diagnosing a large amount of manpowers and the time spent by CT bulbs in the prior art；
2nd, can the spectrum signature based on Air correction data diagnose CT bulb plate target rotation status, and Air correction
The spectrum signature of data can be obtained by Fast Fourier Transform (FFT), and data processing method is simple, effective, improves the effect of diagnosis
The reliability of rate and diagnostic result.
Brief description of the drawings
Fig. 1 is a kind of structural representation of CT system of the present invention；
Fig. 2 is a kind of exemplary process diagram of CT bulbs diagnostic method of the present invention；
Fig. 3 is oscillograms of the air data A under time domain in one embodiment of the invention；
Fig. 4 is the oscillogram of frequency spectrum Bs of the air data A under frequency domain in Fig. 3；
Fig. 1 is marked：101 be CT bulbs, and 102 be collimater, and 103 be X-ray, and 104 be detector, and 105 be data acquisition
Unit, 106 be data processing unit, and 107 be information display unit.
Embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, with reference to the accompanying drawings and examples
Embodiment to the present invention is described in detail.
In order to intactly understand the present invention, Fig. 1 is refer to, the structure of the CT system of the present invention in a preferred embodiment thereof is represented
Schematic diagram.The system is including but not limited to CT bulbs 101, collimater 102, detector 104, data acquisition unit 105, at data
Manage unit 106 and information display unit 107.
CT bulbs 101 can be for generation X-ray 103.Alternatively, the CT bulbs 101 can be by rotary anode and the moon
Pole (filament) is constituted, and the rotary anode can include stator, rotor and plate target (not shown in FIG. 1).Specifically, ball
Tube cathode can produce electron beam under high-voltage filament, then the electron beam accelerating impact anode target surface under high field, and electron beam exists
Anode target surface can be reflected, so as to produce the X-ray 103 (as shown in Figure 1) of fan-shaped distribution.X-ray is produced in CT bulbs 101
During 103, plate target can carry out high speed rotation with certain speed, if exception or failure occur for plate target, will cause anode
The rotary speed of target changes or occurred unstable state.
Collimater 102 can be for calibrating the X-ray 103 launched from bulb 101 to desired width.Collimater 102 can
To be restricted to the radioactive ray angular distribution up to detector 104, and the X-ray 103 of particular space unit is allowed to enter detector
104 (for example, making the X-ray 103 that detector 104 is received perpendicular to detector).Alternatively, the collimater 102 can be wrapped
Include preceding collimater and rear collimater.After CT bulbs 101 produce X-ray 103, X-ray 103 is calibrated by collimater 102, then
The X-ray 103 after the calibration is received by detector 104.
Detector 104 can be used for receiving the signal of X-ray 103 and be converted to corresponding electric signal.Detector 104 can profit
With X-ray 103, caused ionization, priming effect or other physicochemical changes carry out X-ray in gas, liquid or solid
103 detections.For example, the detector 104 can be gas detector, scintillation detector or semiconductor detector etc..Detector
104 can detect the strength information of X-ray 103, and export in electrical signal form.The electric signal can pass through data acquisition list
Member 105 is acquired.In certain embodiments, data acquisition unit 105 can include A/D converter, so that by the electricity of collection
Signal is converted to data signal or data.If the X-ray 103 that CT bulbs 101 are launched is not passed through any test object or obstacle
Object (wherein, collimater 102 is not belonging to obstructing objects) and directly received by detector 104, then by data acquisition unit 105
The data of collection are air data.
Data acquisition unit 105 can gather the data of the output of detector 104.In certain embodiments, data acquisition list
Member 105 can carry out data acquisition according to default sampling rule.It is default sampling rule can be：Cavity is in CT system
Under state, the signal produced with certain sampling time interval collection X-ray 103.CT system refers in CT in cavity state
Do not placed in light path between bulb 101 and detector 104 any object (or, X-ray 103 is not passed through any test object
Or obstructing objects).The response data that the X-ray 103 that cavity state test survey device is detected is in CT system is air number
According to.The time interval that data acquisition unit 105 is sampled every time can be with identical, and the time interval can be described as the time of integration, then
The air data that the data acquisition unit 105 is collected is it can be understood that be the explorer response data of time domain.
When the plate target in CT bulbs 101 is rotated with certain speed and launches X-ray, data acquisition unit 105 can be with
Collect air data.The air data collected is relevant with the rotary speed of plate target, by handling air data
And analysis, it can be determined that whether the rotary speed of plate target is abnormal, and then diagnoses whether the rotation status of plate target exception occurs
Or failure.
Data processing unit 106 can be handled and analyzed to the data that data acquisition unit 105 is gathered, including time domain
And/or the processing and analysis of frequency domain.For example, data processing unit 106 can be converted to the explorer response data of time domain frequency
Explorer response data under domain, will the air data transform from the time domain to frequency domain.Alternatively, data processing unit 106
The air data can be transformed from the time domain into frequency domain using a variety of methods.Methods described can include but is not limited to discrete Fu
In leaf transformation, Fast Fourier Transform (FFT), wavelet transformation etc..Alternatively, when the air data is transformed from the time domain into frequency domain,
Processing first can be filtered to the air data, to eliminate the interference of noise.Further, data processing unit is being passed through
After 106 processing, frequency spectrum of the air data under frequency domain can be obtained, the frequency spectrum is alternatively referred to as explorer response frequency
Spectrum.One plate target rotary speed can correspond to a characteristic peak with specific frequency.Different plate target rotary speeies can
With the characteristic peak of the correspondence different frequency on explorer response frequency spectrum.Data processing unit 106 can be diagnosed according to air data
The working condition of CT bulbs.Alternatively, data processing unit 106 can carry out Fast Fourier Transform (FFT) to the air data,
To obtain the corresponding frequency spectrum of the air data；Data processing unit 106 can be according to being determined the model of the CT bulbs
The corresponding specific frequency of plate target rotary speed of CT bulbs；Data processing unit 106 can recognize the frequency spectrum of air data
Characteristic peak；Whether data processing unit 106 can deviate the working condition that specific frequency judges CT bulbs according to the characteristic peak.
For example, if it is judged that the characteristic peak deviate from the specific frequency, it is determined that the plate target rotation control of the CT bulbs
Occur abnormal；If it is judged that the characteristic peak is without departing from the specific frequency, it is determined that the plate target rotation of the CT bulbs
Control does not occur exception.
Information display unit 107 can be for the display explorer response frequency spectrum.In certain embodiments, engineering
Teacher can determine whether the plate target rotation status of CT bulbs 101 is abnormal according to the explorer response frequency spectrum of the display.For example,
Technician can judge whether the corresponding characteristic peak of CT bulb plate target rotary speeies deviate from spy according to the frequency spectrum
Determine frequency.If the characteristic peak deviate from specific frequency, it is determined that exception occurs in CT bulb plate targets rotation status, and then examines
Break and CT bulbs and exception or failure occur, can notify that corresponding technical staff is repaired in time.If the characteristic peak with
The specific frequency of the plate target rotary speed is corresponded, it is determined that CT bulb working conditions are good.In certain embodiments,
Data processing unit 106 can automatically extract the corresponding characteristic peak of CT bulb plate target rotary speeies, and be carried out with specific frequency
Compare, and then provide the whether good judged result of CT bulbs working condition automatically.CT bulbs working condition can further by
Information display unit 107 is shown, with reminding technology engineer or the user of service of CT system.
Further, the characteristic peak can be fundamental frequency peak and/or frequency multiplication peak.For example, A model bulb plate targets is a certain
The corresponding specific frequency of rotary speed is 60Hz, then in the bulb normal operating conditions, its characteristic peak in frequency spectrum
60Hz, 120Hz, 180Hz etc. should be appeared in.The corresponding characteristic peak of the 60Hz is fundamental frequency peak, and the 120Hz and
The corresponding characteristic peaks of 180Hz are frequency multiplication peak.
Fig. 2 is a kind of exemplary process diagram of CT bulbs diagnostic method of the present invention.
In step 201, air data can be obtained by the data acquisition unit 105, obtains the detection of time domain
Device is responded.
In step 202., it is possible to use 106 pairs of the data processing unit air data carries out fast Fourier change
Change, will the air data transform from the time domain to frequency domain with obtain the corresponding frequency spectrum of air data (that is, explorer response frequency
Spectrum).It is understood that some response signals can be presented with specific characteristic (such as fixed time interval, frequency etc.), lead to
The characteristic can more easily be recognized by crossing frequency spectrum.
In step 203, the working condition of CT bulbs can be determined according to the corresponding frequency spectrum of the air data.
Specifically, it can judge whether the corresponding characteristic peak of CT bulb plate target rotary speeies deviates according to the frequency spectrum
Specific frequency.If the characteristic peak deviate from the corresponding specific frequency of the plate target rotary speed, it is determined that CT bulbs
The control of plate target rotary speed occurs abnormal, and then is diagnosed to be CT bulbs and exception or failure occurs, can notify corresponding in time
Technical staff repaired.If characteristic peak specific frequency corresponding with the plate target rotary speed is corresponded,
Then determine that CT bulb working conditions are good.
Fig. 3 is oscillograms of the air data A under time domain in one embodiment of the invention, when abscissa is signal acquisition
Between, relative intensity information of the X-ray in time domain that ordinate is air data A.
Fig. 4 is the oscillogram of frequency spectrum Bs of the air data A under frequency domain in Fig. 3, and abscissa is frequency, and ordinate represents X
Relative intensity information of the ray in frequency domain.
It is pointed out that in this embodiment, the corresponding specific frequency of CT bulb plate target rotary speeies is 60Hz.Such as
Shown in Fig. 4, it can be seen that frequency is 60Hz fundamental frequency peak and frequency multiplication peak from the frequency spectrum B, i.e., characteristic peak is without departing from specific
Frequency 60Hz, can determine whether that the control of the plate target rotary speed is normal, then CT bulbs working condition is normal.If, the frequency
Spectrum B fundamental frequency peak deviates considerably from 60Hz, then illustrates that the control of the plate target rotary speed occurs in that exception.
In the present invention, it is that examining to the working condition of CT bulb plate targets can be achieved using the spectrum signature of air data
It is disconnected, compared to the experience for needing to rely on technician in the prior art come for diagnosing bulb, the diagnostic method is more simple
It is single and effective.
Being preferable to carry out for the present invention is the foregoing is only, is not intended to limit the invention, for the technology of this area
For personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of CT bulbs diagnostic method, it is characterised in that methods described includes：
Air data is obtained from CT system, the CT system includes the CT bulbs and detector, and the air data refers to
Under the cavity state of the CT system, the response signal data for the X-ray that the detector is detected；
The air data is transformed from the time domain into frequency domain, to obtain the corresponding frequency spectrum of the air data；And
According to the corresponding frequency spectrum of the air data, the working condition of CT bulbs is determined.
2. CT bulbs diagnostic method as claimed in claim 1, it is characterised in that the cavity state of the CT system refers in institute
State and do not place test object or obstructing objects in the light path between CT bulbs and the detector.
3. CT bulbs diagnostic method as claimed in claim 1, it is characterised in that described to convert the air data from time domain
Include to frequency domain：
Fast Fourier Transform (FFT) is carried out to the air data so that the air data transforms from the time domain to frequency domain.
4. CT bulbs diagnostic method as claimed in claim 1, it is characterised in that described according to the corresponding frequency of the air data
Spectrum determines that the working condition of CT bulbs includes：
The corresponding specific frequency of plate target rotary speed of the CT bulbs is determined according to the model of the CT bulbs；
Recognize the characteristic peak of the frequency spectrum；And
If it is judged that the characteristic peak deviate from the specific frequency, it is determined that the plate target rotation of the CT bulbs is controlled out
It is now abnormal.
5. CT bulbs diagnostic method as claimed in claim 4, it is characterised in that described according to the corresponding frequency of the air data
Spectrum determines that the working condition of CT bulbs further comprises：
If it is judged that the characteristic peak is without departing from the specific frequency, it is determined that the plate target rotation control of the CT bulbs is not
Occur abnormal.
6. CT bulbs diagnostic method as claimed in claim 4, it is characterised in that the characteristic peak includes the fundamental frequency of the frequency spectrum
Peak and frequency multiplication peak.
7. a kind of CT system, it is characterised in that the system includes：
CT bulbs, the CT bulbs are used to launch X-ray；
Detector, the detector is used to detect air data；
Data acquisition unit, the data acquisition unit is used to gather the air data；And
Data processing unit, the data processing unit is used for the work shape that the CT bulbs are diagnosed according to the air data
State.
8. CT system as claimed in claim 7, it is characterised in that the system further comprises：
Information display unit, described information display unit is used for the diagnostic result for showing the air data or CT bulbs.
9. CT system as claimed in claim 7, it is characterised in that the air data is the cavity state in the CT system
Under, the response signal data for the X-ray that the detector is detected.
10. CT system as claimed in claim 7, it is characterised in that the data processing unit is used for：
Fast Fourier Transform (FFT) is carried out to the air data, to obtain the corresponding frequency spectrum of the air data；
The corresponding specific frequency of plate target rotary speed of the CT bulbs is determined according to the model of the CT bulbs；
Recognize the characteristic peak of the frequency spectrum；
If it is judged that the characteristic peak deviate from the specific frequency, it is determined that the plate target rotation of the CT bulbs is controlled out
It is now abnormal；And
If it is judged that the characteristic peak is without departing from the specific frequency, it is determined that the plate target rotation control of the CT bulbs is not
Occur abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519562.0A CN107184227A (en) | 2017-06-30 | 2017-06-30 | CT bulbs diagnostic method and CT system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710519562.0A CN107184227A (en) | 2017-06-30 | 2017-06-30 | CT bulbs diagnostic method and CT system |
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| Publication Number | Publication Date |
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| CN107184227A true CN107184227A (en) | 2017-09-22 |
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| CN201710519562.0A Pending CN107184227A (en) | 2017-06-30 | 2017-06-30 | CT bulbs diagnostic method and CT system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186035A (en) * | 2018-01-02 | 2018-06-22 | 上海联影医疗科技有限公司 | X-ray imaging system method for diagnosing faults, device, system and storage medium |
| CN108209951A (en) * | 2018-01-02 | 2018-06-29 | 上海联影医疗科技有限公司 | Monitor the method and device of x-ray imaging equipment operation |
| CN113433582A (en) * | 2021-05-13 | 2021-09-24 | 上海交通大学 | X-ray bulb tube beam diagnosis method |
| US11213272B2 (en) | 2018-01-02 | 2022-01-04 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for monitoring a medical device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1132943A2 (en) * | 2000-03-08 | 2001-09-12 | Marconi Medical Systems, Inc. | Detection system for x-ray tubes |
| CN106526216A (en) * | 2016-11-29 | 2017-03-22 | 上海联影医疗科技有限公司 | Method and apparatus for detecting rotating speed of anode target of bulb tube |
-
2017
- 2017-06-30 CN CN201710519562.0A patent/CN107184227A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1132943A2 (en) * | 2000-03-08 | 2001-09-12 | Marconi Medical Systems, Inc. | Detection system for x-ray tubes |
| CN106526216A (en) * | 2016-11-29 | 2017-03-22 | 上海联影医疗科技有限公司 | Method and apparatus for detecting rotating speed of anode target of bulb tube |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186035A (en) * | 2018-01-02 | 2018-06-22 | 上海联影医疗科技有限公司 | X-ray imaging system method for diagnosing faults, device, system and storage medium |
| CN108209951A (en) * | 2018-01-02 | 2018-06-29 | 上海联影医疗科技有限公司 | Monitor the method and device of x-ray imaging equipment operation |
| US11213272B2 (en) | 2018-01-02 | 2022-01-04 | Shanghai United Imaging Healthcare Co., Ltd. | Systems and methods for monitoring a medical device |
| CN108209951B (en) * | 2018-01-02 | 2024-07-26 | 上海联影医疗科技股份有限公司 | Method and device for monitoring operation of X-ray imaging equipment |
| CN113433582A (en) * | 2021-05-13 | 2021-09-24 | 上海交通大学 | X-ray bulb tube beam diagnosis method |
| CN113433582B (en) * | 2021-05-13 | 2022-08-23 | 上海交通大学 | X-ray bulb tube beam diagnosis method |
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Application publication date: 20170922 |