CN106901762B - A kind of flat panel detector system and its image denoising method - Google Patents
A kind of flat panel detector system and its image denoising method Download PDFInfo
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Abstract
The present invention provides a kind of flat panel detector system and its image denoising method, wherein, the flat panel detector system includes at least: X ray sensor, driving circuit is acquired, host CPU controls processing unit, image-display units, low noise voltage regulator circuit, backup super capacitor, charhing unit, Switching Power Supply and external input power；Wherein, the host CPU control processing unit is also used to synchronize timing control to the acquisition driving circuit, described image display unit, the charhing unit and the Switching Power Supply；At the Image Acquisition moment, the host CPU control processing unit is also used to close the Switching Power Supply and the charhing unit, and the synchronous enabling backup super capacitor.The present invention allows to power inside flat panel detector using efficient Switching Power Supply, while providing the ameliorative way for avoiding that fringes noise interference is generated to detector image, reduces internal shield cost, improves picture noise, improves the stability of picture noise.
Description
Technical field
The present invention relates to detector technology fields, more particularly to a kind of flat panel detector system and its image noise reduction side
Method.
Background technique
Digital radiography (Digital Radiography, abbreviation DR), is the X to grow up the nineties in last century
Radiography new technology, with its faster image taking speed, more convenient and fast remarkable advantages such as operation, higher imaging resolution, at
For the dominant direction of digital X-ray camera work, and obtain the Clinical Institutions of countries in the world and iconography expert approves.The skill of DR
Art core is flat panel detector, and flat panel detector is a kind of accurate and valuable equipment, plays conclusive work to image quality
With.Flat panel detector is the reception device of X-ray in DR system.In DR system, high pressure generator and bulb control X-ray
Output, X-ray pass through object and decay, after the X-ray after decaying is changed into visible light after flat panel detector, and pass through
Crossing photoelectric conversion becomes electric signal, then switchs to count through analog/digital converter (Analog/Digital Converter, ADC)
Word signal, is input to computer disposal.
X-ray flat panel detector system specifically includes that X ray sensor, acquisition driving circuit, host CPU control processing are single
Member, image-display units etc..The imaging process of X-ray flat panel detector needs that " X-ray " is undergone to arrive " visible light " arrives " electricity again
The conversion process of son ".In image shoot process, it can be incident on X ray sensor first through the X-ray to decay after human body
The photoelectric conversion layer (i.e. scintillator layers, general selection cesium iodide or gadolinium oxysulfide) on surface, photoelectric conversion layer converts X-ray to
Visible light, photodiode under photoelectric conversion layer is located in X ray sensor again it will be seen that light is converted to charge signal, storage
In the capacitor of photodiode itself.In image acquisition process, scanning integral is driven to read line by line by acquisition driving circuit
These charge signals out, then these charge signals are converted to the data image signal of quantization, to complete Image Acquisition.Then
Data image signal is transmitted to host CPU control processing unit and carries out the operation such as image processing correction, it is aobvious to be finally delivered to image
Show that unit is shown.
Flat panel detector system generallys use Switching Power Supply and provides working power for its each component units, because of Switching Power Supply
Using DC voltage conversion mode, whole efficiency is not likely to produce unnecessary heat, to avoid X-ray compared with linear power supply height
Sensor section temperature rise is excessively high, reduces leakage current, and then promote picture quality.But Simultaneous Switching power supply meeting radiated electromagnetic wave, by
Charge in X ray sensor is easy the interference changed by external electromagnetic, and the electromagnetic wave of Switching Power Supply radiation can be to charge
It causes near field noise to interfere, so that flat panel detector noise is affected by Switching Power Supply, and then striped is generated to image
Noise jamming influences image noise level, and the picture quality finally obtained is poor, causes the inconvenience in clinical use.Existing skill
It, can be dry come mask switch power supply bring near field noise by increasing screen unit in flat panel detector internal system in art
It disturbs, but the cost of screen unit is excessively high.
Therefore, how while flat panel detector is powered using Switching Power Supply, Switching Power Supply bring near field is avoided to make an uproar
Acoustic jamming is a problem to be solved.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of flat panel detector system and its
Image denoising method influences picture quality for solving the problem of that Switching Power Supply brings near field noise to interfere in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a kind of flat panel detector system, wherein described flat
Partitioned detector system includes at least:
X ray sensor is converted into visible light for receiving X-ray, and by the X-ray, then the visible light is turned
Turn to charge signal；
Driving circuit is acquired, the X ray sensor is connected to, the X ray sensor is scanned for driving, then adopts
Collect the charge signal, then the charge signal is integrated and is amplified, and is converted into data image signal；
Host CPU controls processing unit, the acquisition driving circuit is connected to, for carrying out figure to the data image signal
As processing, to obtain X-ray digital image；
Image-display units are connected to the host CPU control processing unit, for showing the X-ray digital image；
Low noise voltage regulator circuit is connected to the acquisition driving circuit and host CPU control processing unit, for distinguishing
Processing unit is controlled for the acquisition driving circuit and the host CPU, and low noise working power is provided；
Backup super capacitor is connected to the low noise voltage regulator circuit, for being the low noise at the Image Acquisition moment
Voltage regulator circuit provides backup battery；
Charhing unit is connected to the host CPU control processing unit and the backup super capacitor, in non-figure
As the acquisition moment is backup super capacitor charging；
Switching Power Supply is connected to the host CPU control processing unit, the low noise voltage regulator circuit and the charging
Unit, for providing working power at the non-image acquisition moment for the low noise voltage regulator circuit and the charhing unit；And
External input power is connected to the Switching Power Supply, for providing external general supply for the Switching Power Supply；
Wherein, host CPU control processing unit be also used to the acquisition driving circuit, described image display unit,
The charhing unit and the Switching Power Supply synchronize timing control；Wherein, in Image Acquisition moment, the host CPU control
Processing unit is also used to close the Switching Power Supply and the charhing unit, and the synchronous enabling backup super capacitor.
Preferably, at the Image Acquisition moment, the acquisition driving circuit is also used to single using processing is controlled with the host CPU
The synchronous sequence control period identical frequency of member drives the scanning X ray sensor so that the X ray sensor into
Corresponding frequency multiplication is consistent with the frequency of oscillation of the Switching Power Supply when line scans, to filter out low-frequency image noise.
Preferably, at the non-image acquisition moment, the host CPU control processing unit be also used to enable the Switching Power Supply and
The charhing unit, and super capacitor is backed up described in close synchronously.
Preferably, the backup super capacitor uses capacity for the supercapacitor of 0.1F~3000F or super capacitor
Device group.
In order to achieve the above objects and other related objects, the present invention provides a kind of image noise reduction side of flat panel detector system
Method, wherein use flat panel detector system as described above, the image denoising method of the flat panel detector system at least wraps
It includes:
The host CPU control processing unit is to the acquisition driving circuit, described image display unit, the charhing unit
Timing control is synchronized with the Switching Power Supply；
At the Image Acquisition moment, the host CPU control processing unit closes the Switching Power Supply and the charhing unit, and
Synchronous to enable the backup super capacitor, the backup super capacitor provides backup battery for the low noise voltage regulator circuit.
Preferably, the image denoising method of the flat panel detector system further include: at the Image Acquisition moment, the acquisition
Driving circuit is driven described in scanning using frequency identical with the synchronous sequence control period of host CPU control processing unit
X ray sensor so that when the X ray sensor is into line scans corresponding frequency multiplication and the Switching Power Supply frequency of oscillation
Unanimously, to filter out low-frequency image noise.
Preferably, the image denoising method of the flat panel detector system further include: at the non-image acquisition moment, the master
CPU controls processing unit and enables the Switching Power Supply and the charhing unit, and super capacitor is backed up described in close synchronously, described
External input power provides external general supply for the Switching Power Supply, and the Switching Power Supply is the low noise voltage regulator circuit and institute
It states charhing unit and working power is provided, the charhing unit is backup super capacitor charging.
Preferably, the non-image acquisition moment includes at least the time of exposure and graphics process shows moment, the plate
The image denoising method of detector system further include:
The low noise voltage regulator circuit is respectively that the acquisition driving circuit and host CPU control processing unit offer are low
Noise operation power supply；
In the time of exposure, the X ray sensor receives X-ray, and converts visible light for the X-ray, then by institute
Stating visible light transformation is charge signal；
At the Image Acquisition moment, the acquisition driving circuit driving scans the X ray sensor, then acquires the electricity
Lotus signal, then the charge signal is integrated and is amplified, and is converted into data image signal；
The moment is shown in image procossing, and the host CPU control processing unit carries out at image the data image signal
Reason, to obtain X-ray digital image, described image display unit shows the X-ray digital image.
Preferably, the backup super capacitor uses capacity for the supercapacitor of 0.1F~3000F or super capacitor
Device group.
As described above, flat panel detector system of the invention and its image denoising method, have the advantages that this hair
It is powered inside bright permission flat panel detector using efficient Switching Power Supply, while providing and avoiding generating striped to detector image
The ameliorative way of noise jamming reduces internal shield cost, improves picture noise, improves the stability of picture noise.
Specifically, the present invention uses high efficiency switch power supply, the X ray sensor part of flat panel detector is by overall power and temperature
Influence is smaller, reduces leakage current.The present invention is controlled by increasing synchronous sequence, turns off the switch power supply at the Image Acquisition moment,
So that Switching Power Supply is stopped working, to weaken near field noise interference, while the normal operation in order to keep digital circuit, increases backup
Super capacitor guarantees the power supply in collection period.In addition, the present invention also increases charhing unit, in Switching Power Supply work
Simultaneously to backup super capacitor fast charging, the switching of piece period is taken the photograph in order to provide the short time.
Detailed description of the invention
Fig. 1 is shown as the flat panel detector system schematic of first embodiment of the invention.
Fig. 2 is shown as the process signal of the image denoising method of the flat panel detector system of second embodiment of the invention
Figure.
Component label instructions
1 X ray sensor
2 acquisition driving circuits
3 host CPUs control processing unit
4 image-display units
5 low noise voltage regulator circuits
6 backup supercapacitive cells
7 charhing units
8 Switching Power Supplies
9 external input powers
S1~S2 step
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.
Referring to Fig. 1, the first embodiment of the present invention is related to a kind of flat panel detector systems.It should be noted that this
The basic conception that only the invention is illustrated in a schematic way is illustrated provided in embodiment, is only shown and the present invention in schema then
In related component rather than component count, shape and size when according to actual implementation draw, when actual implementation each component
Kenel, quantity and ratio can arbitrarily change for one kind, and its assembly layout kenel may also be increasingly complex.
As shown in Figure 1, the flat panel detector system of present embodiment includes at least: X ray sensor 1 is connected to X-ray
The acquisition driving circuit 2 of sensor 1 is connected to the host CPU control processing unit 3 of acquisition driving circuit 2, is connected to host CPU control
The image-display units 4 of processing unit 3 processed are connected to the low noise of acquisition driving circuit 2 and host CPU control processing unit 3
Sound voltage regulator circuit 5 is connected to the backup super capacitor 6 of low noise voltage regulator circuit 5, is connected to host CPU control processing unit 3
With the Switching Power Supply 8 of the low noise voltage regulator circuit 5, it is connected to host CPU control processing unit 3,6 and of backup super capacitor
The charhing unit 7 of Switching Power Supply 8, and it is connected to the external input power 9 of Switching Power Supply 8.Wherein:
X ray sensor 1 converts visible light for X-ray, then it will be seen that light is converted into charge for receiving X-ray
Signal.In the present embodiment, using existing X ray sensor 1, top layer be photoelectric conversion layer (i.e. scintillator layers, one
As selection cesium iodide or gadolinium oxysulfide), be photodiode below photoelectric conversion layer.In image shoot process, through human body
The X-ray to decay afterwards can be incident on the photoelectric conversion layer of 1 upper surface of X ray sensor first, and photoelectric conversion layer converts X-ray
It is located at the photodiode under photoelectric conversion layer for visible light, in X ray sensor 1 again and will be seen that light is converted to charge signal,
It is stored in the capacitor of photodiode itself.
Driving circuit 2 is acquired for driving scanning X ray sensor 1, then acquires charge signal, then charge signal is long-pending
Divide amplification, and is converted into data image signal.In the present embodiment, it using existing acquisition driving circuit 2, realizes to photoelectricity
The driving scanning of diode and signal acquisition.In image acquisition process, scanning and product are driven by acquisition driving circuit 2 line by line
It point reads the charge signal stored in every row photodiode, then the digitized map of quantization will be converted to after the amplification of these charge signals
As signal, to complete Image Acquisition.After the completion of Image Acquisition, acquisition driving circuit 2 can include clinical people for collected
The data image signal of volumetric image data sends host CPU control processing unit 3 to.
Host CPU controls processing unit 3 and is used to carry out image procossing to data image signal, to obtain X-ray digital image.
In the present embodiment, processing unit 3 is controlled using existing host CPU, is automatically or based on host computer manually to above-mentioned number
Picture signal carries out image procossing, operates including image rectification etc., to obtain final X-ray digital image.At image
After the completion of reason, host CPU control processing unit 3 can send X-ray digital image to image-display units 4.
Image-display units 4 are for showing X-ray digital image.In the present embodiment, it is shown using existing image
Unit 4, receive by host CPU control processing unit 3 transmission Lai X-ray digital image after, display it, for medical care
Personnel's clinical diagnosis is checked.
Low noise voltage regulator circuit 5 is for being respectively to acquire driving circuit 2 and the host CPU control offer low noise of processing unit 3
Working power.In the present embodiment, using existing low noise voltage regulator circuit 7, the power supply that backup super capacitor 6 is provided into
Image Acquisition moment is converted to after row pressure stabilizing noise reduction process (when i.e. acquisition driving circuit 2 is integrated and acquired to charge signal)
Required low noise working power, it is ensured that picture noise is unaffected, keeps good picture noise horizontal；It will open simultaneously
The power supply that powered-down source 8 provides be converted to after pressure stabilizing noise reduction process the non-image acquisition moment that (such as host CPU controls processing unit
When 3 pairs of data image signals carry out image procossing) needed for low noise working power prevented out with reducing circuit interference noise
Powered-down source 8 has an impact picture noise when working.
Backup super capacitor 6 is used to provide backup battery at the Image Acquisition moment for the low noise voltage regulator circuit.At this
In embodiment, backup super capacitor 6 uses capacity for the supercapacitor of 0.1F~3000F or supercapacitor group, excellent
Selecting capacity is that the supercapacitor of 2100F can guarantee since supercapacitor can provide instantaneous large-current from Switching Power Supply
When 8 power switchings are powered to backup super capacitor 6, power supply is converted to fast and stable, guarantees that the power supply in signal acquisition periods supplies
It gives.
Charhing unit 7 is used at the non-image acquisition moment be backup super capacitor charging.Switching Power Supply 8 is used for non-
The Image Acquisition moment provides working power for the low noise voltage regulator circuit and the charhing unit, wherein Switching Power Supply 8 is beaten
Open and close to be realized by controlling the frequency of oscillation of its own, the frequency of oscillation for turning off the switch power supply 8 can make Switching Power Supply 8
It stops working.External input power 9 is used to provide external general supply for Switching Power Supply 8.It should be noted that in present embodiment
In, the non-image acquisition moment includes at least the time of exposure and graphics process shows the moment；It is of course also possible to include in addition to acquisition is driven
Except the dynamic circuit 2 in running order Image Acquisition moment, achieved by flat panel detector system other structures other
The function moment.
It is to be understood that in the present embodiment, host CPU control processing unit 3 be also used to acquisition driving circuit 2,
Image-display units 4, charhing unit 7 and Switching Power Supply 8 synchronize timing control.Specifically, host CPU controls processing unit
3 can synchronize and set to the timing control of acquisition driving circuit 2, image-display units 4, charhing unit 7 and Switching Power Supply 8
Fixed, host CPU control processing unit 3 is set as the Image Acquisition moment in running order in acquisition driving circuit 2, and control is closed
Switching Power Supply 8 and charhing unit 7, and synchronous enabling backup super capacitor 6.Correspondingly, host CPU control processing unit 3 is also set
For acquisition driving circuit 2 be in off working state the non-image acquisition moment (can be the time of exposure, the image procossing moment or
Person's image shows the moment), control enables Switching Power Supply 8 and charhing unit 7, and close synchronously backup super capacitor 6.Thus it sets
Fixed, at the Image Acquisition moment, host CPU control processing unit 3 is also used to turn off the switch power supply 8 and charhing unit 7, and synchronous enabling
Backup super capacitor 6；At the non-image acquisition moment, host CPU control processing unit 3 is also used to enable Switching Power Supply 8 and charging is single
Member 7, and close synchronously backup super capacitor 6.
In addition, in the present embodiment, at the Image Acquisition moment, acquiring driving circuit 2 and being also used to control using with host CPU
The synchronous sequence control period identical frequency of processing unit 3 scans X ray sensor 1 to drive, so that X ray sensor 1
Corresponding frequency multiplication is consistent with the frequency of oscillation of Switching Power Supply 8 when into line scans, to filter out low-frequency image noise.
It can be seen that the flat panel detector system of present embodiment, is powered using efficient Switching Power Supply 8, plate is visited
1 part of X ray sensor for surveying device is influenced smaller by overall power and temperature, reduces leakage current；By increasing synchronous sequence
Control, the frequency of oscillation of power supply 8 is turned off the switch at the Image Acquisition moment, Switching Power Supply 8 is made to stop working, to weaken near field noise
Interference, while the normal operation in order to keep digital circuit increase backup super capacitor 6, guarantee that the power supply in collection period supplies
It gives；Also increase charhing unit 7, to 6 quick charge of backup super capacitor while Switching Power Supply 8 works, in order to provide in short-term
Between take the photograph the piece period switching.
It is noted that each unit involved in present embodiment is logic unit, and in practical applications, one
A logic unit can be a physical unit, be also possible to a part of a physical unit, can also be with multiple physics lists
The combination of member is realized.In addition, in order to protrude innovative part of the invention, it will not be with solution institute of the present invention in present embodiment
The technical issues of proposition, the less close unit of relationship introduced, but this does not indicate that there is no other single in present embodiment
Member.
Referring to Fig. 2, second embodiment of the invention is related to a kind of image denoising method of flat panel detector system, use
The flat panel detector system that first embodiment of the invention is related to.The image noise reduction side of the flat panel detector system of present embodiment
Method includes at least:
Step S1, host CPU control 3 pairs of acquisition driving circuits 2 of processing unit, image-display units 4, charhing unit 7 and open
Powered-down source 8 synchronizes timing control；At the Image Acquisition moment, host CPU control processing unit 3 turns off the switch power supply 8 and charging
Unit 7, and synchronous enabling backup super capacitor 6.
Step S2, backup super capacitor 6 are that low noise voltage regulator circuit 5 provides backup battery.
In addition, the image denoising method of the flat panel detector system of present embodiment further include:
Step S3, low noise voltage regulator circuit 5 are that acquisition driving circuit 2 provides low noise working power.
Step S4, the acquisition driving scanning X ray sensor 1 of driving circuit 2, then acquires charge signal, then charge is believed
Number integral amplification, and is converted into data image signal.
Wherein, in step s 4, acquisition driving circuit 2 controls week using the synchronous sequence with host CPU control processing unit 3
Phase identical frequency drives scanning X ray sensor 1 so that when X ray sensor 1 is into line scans corresponding frequency multiplication with open
The frequency of oscillation in powered-down source 8 is consistent, to filter out low-frequency image noise.
In addition, the image denoising method of the flat panel detector system of present embodiment further include:
Step S1 ', host CPU control 3 pairs of acquisition driving circuits 2 of processing unit, image-display units 4, charhing unit 7 and open
Powered-down source 8 synchronizes timing control；At the non-image acquisition moment, host CPU control processing unit 3 enables Switching Power Supply 8 and fills
Electric unit 7, and close synchronously backup super capacitor 6.
Step S2 ', external input power 9 are that Switching Power Supply 8 provides external general supply, and Switching Power Supply 8 is low noise pressure stabilizing
Circuit 5 and charhing unit 7 provide working power, while charhing unit 7 is the charging of backup super capacitor 6.
Step S3 ', low noise voltage regulator circuit 5 are that host CPU control processing unit 3 provides low noise working power.
Step S4 ', in the time of exposure, X ray sensor 1 receives X-ray, and converts visible light for X-ray, then can
It is light-exposed to be converted into charge signal；The moment is shown in image procossing, and host CPU control processing unit 3 carries out figure to data image signal
As processing, to obtain X-ray digital image, image-display units 4 show X-ray digital image.
Wherein, backup super capacitor uses capacity for the supercapacitor of 0.1F~3000F or supercapacitor group, excellent
Selecting capacity is that the supercapacitor of 2100F can guarantee since supercapacitor can provide instantaneous large-current from Switching Power Supply
When 8 power switchings are powered to backup super capacitor 6, power supply is converted to fast and stable, guarantees that the power supply in signal acquisition periods supplies
It gives.
Therefore the image denoising method of the flat panel detector system of present embodiment is by increasing synchronous sequence control
System, the frequency of oscillation of power supply 8 is turned off the switch at the Image Acquisition moment, Switching Power Supply 8 is made to stop working, dry to weaken near field noise
It disturbs, while the normal operation in order to keep digital circuit, increases backup super capacitor 6, guarantee the power supply in collection period.
That is, present embodiments provide for a kind of reduction detector images as caused by Switching Power Supply 8 to generate fringes noise interference
Method, reduce internal shield cost, improve picture noise, improve the stability of picture noise.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as comprising identical logical relation, all in the protection scope of this patent
It is interior；To adding inessential modification in algorithm or in process or introducing inessential design, but its algorithm is not changed
Core design with process is all in the protection scope of the patent.
It is not difficult to find that present embodiment is method implementation corresponding with first embodiment, present embodiment can
It works in coordination implementation with first embodiment.The relevant technical details mentioned in first embodiment are in the present embodiment still
Effectively, in order to reduce repetition, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment can also be applied
In the first embodiment.
In conclusion flat panel detector system of the invention and its image denoising method, have the advantages that this hair
It is powered inside bright permission flat panel detector using efficient Switching Power Supply, while providing and avoiding generating striped to detector image
The ameliorative way of noise jamming reduces internal shield cost, improves picture noise, improves the stability of picture noise.
Specifically, the present invention uses high efficiency switch power supply, the X ray sensor part of flat panel detector is by overall power and temperature
Influence is smaller, reduces leakage current.The present invention is controlled by increasing synchronous sequence, turns off the switch power supply at the Image Acquisition moment,
So that Switching Power Supply is stopped working, to weaken near field noise interference, while the normal operation in order to keep digital circuit, increases backup
Super capacitor guarantees the power supply in collection period.In addition, the present invention also increases charhing unit, in Switching Power Supply work
Simultaneously to backup super capacitor fast charging, the switching of piece period is taken the photograph in order to provide the short time.So the present invention effectively overcomes
Various shortcoming in the prior art and have high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (7)
1. a kind of flat panel detector system, which is characterized in that the flat panel detector system includes at least:
X ray sensor is converted into visible light for receiving X-ray, and by the X-ray, then is by the visible light transformation
Charge signal；
Driving circuit is acquired, the X ray sensor is connected to, the X ray sensor is scanned for driving, then acquires institute
Charge signal is stated, then the charge signal is integrated and is amplified, and is converted into data image signal；
Host CPU controls processing unit, is connected to the acquisition driving circuit, for carrying out at image to the data image signal
Reason, to obtain X-ray digital image；
Image-display units are connected to the host CPU control processing unit, for showing the X-ray digital image；
Low noise voltage regulator circuit is connected to the acquisition driving circuit and host CPU control processing unit, for respectively institute
It states acquisition driving circuit and host CPU control processing unit provides low noise working power；
Backup super capacitor is connected to the low noise voltage regulator circuit, for being the low noise pressure stabilizing at the Image Acquisition moment
Circuit provides backup battery；
Charhing unit is connected to the host CPU control processing unit and the backup super capacitor, for adopting non-image
Collect the moment for backup super capacitor charging；
It is single to be connected to the host CPU control processing unit, the low noise voltage regulator circuit and the charging for Switching Power Supply
Member, for providing working power at the non-image acquisition moment for the low noise voltage regulator circuit and the charhing unit；And
External input power is connected to the Switching Power Supply, for providing external general supply for the Switching Power Supply；
Wherein, host CPU control processing unit is also used to the acquisition driving circuit, described image display unit, described
Charhing unit and the Switching Power Supply synchronize timing control；Wherein, in Image Acquisition moment, the host CPU control processing
Unit is also used to close the Switching Power Supply and the charhing unit, and the synchronous enabling backup super capacitor.
2. flat panel detector system according to claim 1, which is characterized in that at the Image Acquisition moment, the acquisition is driven
Dynamic circuit is also used to drive scanning using frequency identical with the synchronous sequence control period of host CPU control processing unit
The X ray sensor so that when the X ray sensor is into line scans corresponding frequency multiplication and the Switching Power Supply oscillation
Frequency is consistent, to filter out low-frequency image noise.
3. flat panel detector system according to claim 1, which is characterized in that at the non-image acquisition moment, the host CPU
Control processing unit is also used to enable the Switching Power Supply and the charhing unit, and super capacitor is backed up described in close synchronously.
4. flat panel detector system according to claim 1, which is characterized in that the backup super capacitor use capacity for
The supercapacitor or capacity of 0.1F~3000F is the supercapacitor group of 0.1F~3000F.
5. a kind of image denoising method of flat panel detector system, which is characterized in that using such as any one of Claims 1 to 4 institute
The image denoising method of the flat panel detector system stated, the flat panel detector system includes at least:
The host CPU control processing unit is to the acquisition driving circuit, described image display unit, the charhing unit and institute
It states Switching Power Supply and synchronizes timing control；
At the Image Acquisition moment, the host CPU control processing unit closes the Switching Power Supply and the charhing unit, and synchronous
The backup super capacitor is enabled, the backup super capacitor provides backup battery for the low noise voltage regulator circuit.
6. the image denoising method of flat panel detector system according to claim 5, which is characterized in that the plate detection
The image denoising method of device system further include: at the non-image acquisition moment, the host CPU control processing unit enables the switch
Power supply and the charhing unit, and super capacitor is backed up described in close synchronously, the external input power is the Switching Power Supply
External general supply is provided, the Switching Power Supply provides working power for the low noise voltage regulator circuit and the charhing unit, institute
Charhing unit is stated as backup super capacitor charging.
7. the image denoising method of flat panel detector system according to claim 6, which is characterized in that described non-image to adopt
Collect the moment including at least the time of exposure and graphics process display moment, the image denoising method of the flat panel detector system also wraps
It includes:
The low noise voltage regulator circuit is respectively that the acquisition driving circuit and host CPU control processing unit provide low noise
Working power；
In the time of exposure, the X ray sensor receives X-ray, and converts visible light for the X-ray, then can by described in
It is light-exposed to be converted into charge signal；
At the Image Acquisition moment, the acquisition driving circuit driving scans the X ray sensor, then acquires the charge letter
Number, then the charge signal is integrated and is amplified, and is converted into data image signal；
The moment is shown in image procossing, the host CPU control processing unit carries out image procossing to the data image signal, with
X-ray digital image is obtained, described image display unit shows the X-ray digital image.
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