CN207816865U - CT examination system - Google Patents
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- CN207816865U CN207816865U CN201721867131.5U CN201721867131U CN207816865U CN 207816865 U CN207816865 U CN 207816865U CN 201721867131 U CN201721867131 U CN 201721867131U CN 207816865 U CN207816865 U CN 207816865U
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Abstract
The utility model is related to CT detection technique fields, more particularly to a kind of CT examination system.CT examination system provided by the utility model, including scanning means and imaging device, wherein：Scanning means has radiation source device and detection device and at least partly carries out non-uniform rotation in the process what is be scanned to object to be checked；Imaging device is based on effective detection data and generates CT images, and effective detection data is data of the detection device in every rotation predetermined angle.In the present invention, the imaging device of CT examination system generates CT images based on data of the detection device in every rotation predetermined angle can effectively reduce image deformation relative to traditional image acquisition scheme, improve the accuracy of testing result.
Description
Technical field
The utility model is related to CT detection technique fields, more particularly to a kind of CT examination system.
Background technology
In addition to being applied to medical field, CT examination system is also extensively used for the technical fields such as Articles detecting, and not
The smaller articles such as row packet and aviation case can only be detected, additionally it is possible to detect the large articles such as container and vehicle.When work, CT inspections
Look into system using it generate the radiation source of sigmatron and can receive detection device across object X-ray to be checked to object to be checked into
Row scanning, changes according to X-ray intensity, to reflect object Density Distribution variation to be checked, and transmitted intensity variation is converted into image
Gray scale obtains the fluoroscopy images of object to be checked.
Existing CT examination system, radioactive source and detection device usually carry out rotary scanning to object to be checked, also, are turning
During dynamic, usually there is acceleration, that is, usually carry out non-uniform rotation scanning.Based on current normal image acquisition scheme,
There are deformation for CT images at reconstruct, influence the accuracy of testing result.
Utility model content
A technical problem to be solved in the utility model is：It is existing that non-uniform rotation scanning is carried out to object to be checked
For the CT images that CT examination system is reconstructed there are deformation, testing result accuracy is poor.
In order to solve the above-mentioned technical problem, the utility model first aspect provides a kind of CT examination system comprising sweeps
Imaging apparatus and imaging device, wherein：Scanning means has radiation source device and detection device and is being scanned to object to be checked
Non- uniform rotation is carried out during at least partly；Imaging device is based on effective detection data and generates CT images, effective detection data
For the detection device data acquired in every rotation predetermined angle.
Optionally, CT examination system further includes rotating monitoring device, and rotating monitoring device detects the rotation angle of scanning means
It spends and sends signal to imaging device when detection device often rotates predetermined angle, imaging device is sent out according to rotating monitoring device
The signal sent determines effective detection data.
Optionally, rotating monitoring device includes position detecting device and rotating control assembly, and position detecting device detection is swept
Position of imaging apparatus during being scanned to object to be checked, the testing result based on position detecting device, rotating control assembly
It determines the rotation angle of scanning means and sends signal to imaging device when scanning means often rotates predetermined angle.
Optionally, imaging device includes data mining device and image processing apparatus, and data mining device, which obtains, effectively to be visited
Effective detection data is simultaneously transferred to image processing apparatus by measured data, and image processing apparatus is transmitted based on data mining device
Effective detection data reconstruct generates CT images.
Optionally, the rotating monitoring device of CT examination system is filled when detection device often rotates predetermined angle to data mining
Transmission signal is set, data mining device is using the data of detection device corresponding with the signal of rotating monitoring device as effective detection
Data transfer is to image processing apparatus.
Optionally, data mining device includes data acquisition facility and image collecting device, and data acquisition facility, which obtains, to be visited
The total data of device is surveyed, image collecting device is chosen from the total data of the detection device acquired in data acquisition facility to be had
Effect detection data is transferred to image processing apparatus.
Optionally, the rotating monitoring device of CT examination system is filled when detection device often rotates predetermined angle to data acquisition
Transmission signal is set, the signal of the rotating monitoring device received is transferred to image collecting device by data acquisition facility, and image is adopted
The data of detection device corresponding with the signal of rotating monitoring device are transferred to as effective detection data at image by acquisition means
Manage device.
Optionally, data mining device includes data acquisition facility and image collecting device, and data acquisition facility acquisition has
Effective detection data is simultaneously transferred to image processing apparatus by effect detection data via image collecting device.
Optionally, the rotating monitoring device of CT examination system is filled when detection device often rotates predetermined angle to data acquisition
Transmission signal is set, data acquisition facility obtains the data of detection device when receiving the signal of rotating monitoring device as effective
Effective detection data is simultaneously transferred to image processing apparatus by detection data via image collecting device.
CT examination system provided by the utility model, imaging device are based on detection device in every rotation predetermined angle
Data generate CT images can effectively reduce image deformation relative to traditional image acquisition scheme, improve testing result
Accuracy.
By the way that the exemplary embodiment of the utility model is described in detail referring to the drawings, the utility model its
Its feature and its advantage will become apparent.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 shows the structure schematic diagram of the CT examination system of one embodiment of the utility model.
Fig. 2 shows the image generating principle figures of CT examination system shown in Fig. 1.
In figure：
1, source device is radiated；2, detection device；3, holder；41, position detecting device；
42, rotating control assembly；51, data acquisition facility；52, image collecting device；53, image processing apparatus；A, it waits for
Examine object.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
There is the every other embodiment carried out and obtained under the premise of creative work, shall fall within the protection scope of the present invention.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing part of specification.
When image is reconstructed in imaging device, need to know which position is the data of accessed detection device be in
Upper acquisition.The imaging device of existing CT examination system, can only be in scanning means uniform rotation, according to rotary speed and starting
The position of detection device data each time is judged in position, and for there are the scanning processes of non-uniform rotation, it but can not be again
The correspondence of accessed detection device data and physical location is effectively determined, so that CT reconstructed images can be caused to occur
Deformation increases identification difficulty, in some instances it may even be possible to lead to not sentence figure.
In order to solve the above-mentioned technical problem, the utility model provides a kind of CT examination system.Fig. 1-2 shows this practicality
One embodiment of novel CT examination system.
Referring to Fig.1-2, CT examination system provided by the utility model includes scanning means and imaging device, wherein：It sweeps
Imaging apparatus have radiation source device 1 and detection device 2 and to object a to be checked be scanned at least partly during carry out it is non-even
Speed rotation；Imaging device is based on effective detection data and generates CT images, and effective detection data is that detection device 2 is default in every rotation
Acquired data when angle.
In the present invention, the imaging device of CT examination system no longer uses traditional image acquisition scheme, but base
Data (effective detection data) when detection device 2 is in every rotation predetermined angle generate CT images, this makes imaging device
The data that the detection data being based on when CT images is all the detection device that can accurately know physical location are reconstructed, to be imaged
Device can not be influenced by non-uniform rotation scanning process, and reconstruct generates the CT images of not deformation, and then it is difficult to reduce identification
Degree improves testing result accuracy.
As a kind of embodiment of the utility model imaging device, imaging device may include data mining device and figure
As processing unit 53, data mining device obtains effective detection data and effective detection data is transferred to image processing apparatus
53, image processing apparatus 53 then generates CT images based on effective detection data reconstruct that data mining device is transmitted.In this way,
Under the mating reaction of data mining device and image processing apparatus 53, imaging device can be conveniently based on effective detection data life
At CT images.
In the present invention, effective detection data is identified in order to facilitate imaging device, CT examination system can be also into one
Step includes rotating monitoring device, and the rotation angle of rotating monitoring device detection scanning means simultaneously often rotates in advance in detection device 2
If sending signal to imaging device when angle, signal of the imaging device transmitted by rotating monitoring device determines effectively detection number
According to.
Since rotating monitoring device sends signal when detection device 2 often rotates predetermined angle to imaging device, at
As device can identify corresponding detection device 2 according to whether the data of detection device 2 bind the signal of rotating monitoring device
Data whether be effective detection data, it is simple and convenient, and effectively detection data identification accuracy it is higher.
Wherein, when imaging device includes as previously described data mining device and image processing apparatus 53, rotating monitoring dress
Signal can be sent when detection device 2 often rotates predetermined angle to data mining device by setting, and data mining device then will be with rotation
The data for turning the corresponding detection device of signal 2 of monitoring device are transferred to image processing apparatus 53 as effective detection data.Base
In this, binding can be had the data of the detection device 2 of rotating monitoring device signal transmitted to be determined as having by data mining device
Detection data is imitated, and image processing apparatus 53 is supplied to reconstruct CT images, convenience and high-efficiency.
The utility model is described further with reference to embodiment shown in Fig. 1-2.
As shown in Figs. 1-2, in this embodiment, CT examination system includes scanning means, imaging device, rotating monitoring device
With holder 3.
Wherein, scanning means is for being scanned object a to be checked comprising radiation source device 1 and detection device 2.Radiation
Source device 1 is for generating the X-ray for penetrating object a to be checked.Detection device 2 will be connect for receiving the X-ray across object to be checked
The X-ray received is converted to the electric signal for record, is used so that imaging device generates CT images.
As shown in Figure 1, the scanning means of the embodiment is arranged on holder 3, and include radiation source device 1 and detection device
2.Holder 3 is in annular shape.Radiation source device 1 and detection device 2 are arranged on holder 3, and radiate source device 1 and detection device
2 are oppositely arranged, in order to which detection device 2 can fully receive the X-ray that corresponding radiation source device 1 is sent out.In holder 3
What portion space formed object a to be checked passes through channel.Object a to be checked is passed through among annulus, and the radiation transmitting of source device 1 X-ray, which penetrates, to be waited for
Object a is examined, and the X-ray for penetrating object a to be checked is incident upon in the detection device 2 opposite with radiation source device 1.It specifically, can by Fig. 1
Know, in this embodiment, object a to be checked is container.Every time when scanning, a section of object a to be checked is placed in by channel, with
Device to be scanned is scanned the corresponding section of object a to be checked.The scanning of a section is often completed, object a to be checked is by CT examination system
The draft gear of system, which draws to next section position to be located at, to be passed through in channel, to complete the scanning of next section.So
Continue, until completing the scanning of entire object a to be checked.
X-ray machine or accelerator may be used in radiation source device 1.The embodiment is using accelerator as radiation source device 1.It visits
It surveys device 2 and uses detector array architecture.In addition, though only showing one group of radiation source device 1 and detection device 2 in Fig. 1, but answer
Work as understanding, scanning means can also include radiation source device 1 more than two and detection device 2.
In this embodiment, scanning means reciprocally swinging object a to be checked is scanned.Specifically, object a to be checked is carried out
When scanning, radiation source device 1 can be rotated clockwise to final position since initial position.During this is rotated clockwise,
Radiation source device 1 goes out always beam, completes the tomoscan of a section.Later, draft gear (not shown) can basis
User demand drags object a to be checked and moves to next section position.At this point, the meeting of source device 1 is radiated again since final position,
It is rotated back to initial position counterclockwise.In the rotary course counterclockwise, radiation source device 1 also goes out always beam, under completing
The tomoscan of one section.
During radiating 1 reciprocally swinging of source device, detection device 2 is also synchronously carried out reciprocally swinging, in this way, radiation
The position that the ray line that source device 1 generates is covered in corresponding detection device 2 can remain constant, advantageously ensure that spy
It surveys device 2 and receives the ray line that radiation source device 1 is sent out, it is ensured that the smooth realization of scanning means scanning function.
Since during above-mentioned reciprocally swinging, there is acceleration in radiation source device 1 and detection device 2, such as put
The dynamic incipient stage, there are accelerators, swung ending phase and there is moderating process again, therefore, the scanning means of the embodiment is every
There is non-rotation process at the uniform velocity in secondary scanning process.If according to traditional image acquisition scheme, imaging device reconstructs
CT images can have deformation.Therefore, in order to enable imaging device accurately to reconstruct CT images, anamorphose, the reality are reduced
It applies example to improve imaging device, and is additionally arranged rotating monitoring device.Under the cooperation of rotating monitoring device, the embodiment
Imaging device can be based on effective detection data (i.e. detection device 2 it is every rotation predetermined angle when data) reconstruct CT scheme
Picture.
Emphasis illustrates the imaging device and rotating monitoring device of the embodiment below.
Rotating monitoring device be used for detect scanning means rotation angle and when detection device 2 often rotates predetermined angle to
Imaging device sends signal, identifies effective detection data in order to imaging device and generates CT images based on effective detection data.
As shown in Fig. 2, in this embodiment, rotating monitoring device includes position detecting device 41 and rotating control assembly 42.Wherein, position
It sets detection device 41 and detects position of scanning means during being scanned to object a to be checked；And the then base of rotating control assembly 42
The rotation angle of scanning means is determined in the testing result of position detecting device 41 and when scanning means often rotates predetermined angle
Signal is sent to imaging device.
Specifically, rotary displacement transducer may be used in position detecting device 41, in real time detect scanning means relative to rise
Beginning position has been rotated through how many displacement, and testing result is fed back to rotating control assembly 42.Certainly, position detecting device 41
Other sensors or even other detection parts can also be used.Rotating control assembly 42 then obtains position detecting device 41 and is examined
The location information of the scanning means measured obtains the corresponding present rotation angel degree of scanning means by calculating.Also, it rotates
Control device 42 can control scanning means rotation, and send one to imaging device when scanning means often rotates predetermined angle
Signal, in order to imaging device difference detection device 2 it is every rotation predetermined angle when data (effective detection data) and its
His data.Wherein, the signal transmitted when detection device 2 often rotates predetermined angle of rotating control assembly 42 can be high level
Signal then may determine that corresponding in this way, imaging device need to only judge whether the data of detection device 2 bind with high level signal
Whether data are effective detection data.In addition, predetermined angle is set as 0.0001 ° in this embodiment, it is to be understood that, it presets
Angle can be specifically adjusted according to actual requirement.
Imaging device is used to acquire the data for obtaining detection device 2, and handles acquiring the data obtained, reconstructs
Generate CT images.As shown in Fig. 2, the imaging device of the embodiment includes data mining device and image processing apparatus 53, data
It includes data acquisition facility 51 and image collecting device 52 to pick up device.Wherein, data acquisition facility 51 obtains detection device 2
Total data；Image collecting device 52 is chosen effectively from the total data of the detection device 2 acquired in data acquisition facility 51
Detection data is transferred to image processing apparatus 53；Effective spy that image processing apparatus 53 is then transmitted based on image collecting device 52
Measured data reconstruct generates CT images.
Based on above-mentioned setting, since effective detection data is identified by image collecting device 52, and acquisition device 51 and fail to see
Ineffective detection data, data acquisition facility 51, and only need to be according to without understanding the current rotation position of detection device 2 and speed
The trigger pulse that accelerator provides all is recorded the data of the detection device 2 got under each pulse, and to figure
As harvester 52 is sent, therefore, the structure of data acquisition facility 51 is relatively simple, and control is more convenient, and without pair
Available data acquisition device 51 is excessively changed, and cost is relatively low.
Specifically, as shown in Fig. 2, the image collecting device 52 of the embodiment identifies that the foundation of effective detection data is rotation
Signal of the monitoring device when detection device 2 often rotates predetermined angle, that is, in this embodiment, 52 basis of image collecting device
Signal of the rotating monitoring device when detection device 2 often rotates predetermined angle carrys out the dress of the detection acquired in the data acquisition facility 51
It sets and chooses effective detection data in 2 total data.
More specifically, as shown in Figure 2, in this embodiment, rotating monitoring device often rotates predetermined angle in detection device 2
When to data acquisition facility 51 send signal, the signal of the rotating monitoring device received is transferred to figure by data acquisition facility 51
As harvester 52, image collecting device 52 is using the data of detection device corresponding with the signal of rotating monitoring device 2 as having
Effect detection data is transferred to image processing apparatus 53.In this way, in CT examination system work process, detection device 2 often rotates in advance
If when angle, rotating control assembly 42, which is understood to data acquisition facility 51, sends a level signal, and data acquisition facility 51 can incite somebody to action
The level signal of received rotating control assembly 42 is sent to together with the data of acquired correspondence moment detection device 2
Image collecting device 52, image collecting device 52 can then carry out the choice of the data of detection device 2 according to level signal,
In, binding is only had the data of the detection device 2 of high level signal to be determined as effective detection data by image collecting device 52.Scanning
After completion, all effective detection datas can be packaged by image collecting device 52, be supplied to image processing apparatus 53 together.
Image processing apparatus 53 then completes CT image reconstructions based on effective detection data that image collecting device 52 is provided.
Since effective detection data and the correspondence of physical location are not influenced by non-uniform rotation scanning process, effectively
The physical location of detection data is always it is found that therefore, imaging device is based on valid data and reconstructs CT images, it is possible to reduce CT images
Deformation, improve the accuracy of testing result.
As an alternate embodiment of above-described embodiment, effective detection data can also be no longer by image collecting device 52
Identification, and directly obtained by data acquisition facility 51, that is, data acquisition facility 51 no longer obtains the total data of detection device 2,
But effective detection data is directly acquired, then effective detection data is transferred to image processing apparatus via image collecting device 52
53.In this case, image collecting device 52 is in addition to having the function of transmitting effective detection data to image processing apparatus 53, no
Has the function of the effective detection data of identification again.
Wherein, data acquisition facility 51 can often rotate predetermined angle when institute according to rotating monitoring device in detection device 2
The signal of transmission identifies effective detection data.Specifically, rotating monitoring device can often rotate predetermined angle in detection device 2
When to data acquisition facility 51 send signal, data acquisition facility 51 then when receiving the signal of rotating monitoring device obtain visit
The data for surveying device 2 are transferred to image procossing as effective detection data and by effective detection data via image collecting device 52
Device 53.More specifically, can be from rotating control assembly 42 to 51 transmission level signal of data acquisition facility, data acquisition facility
51 just obtain the data of detection device 2 after receiving the level signal, and using acquired data as effective detection number
It is sent to image processing apparatus 53 according to via image collecting device 52.
In summary, the CT examination system of the utility model can effectively solve non-uniform rotation scanning in the prior art
When reconstruct CT images problem on deformation.
Based on this, on the other hand the utility model additionally provides a kind of CT imaging methods comprising following steps：
Object a to be checked is scanned using the cooperation of the radiation source device 1 and detection device 2 of scanning means, scanning means
Non-uniform movement is at least partly carried out in the process in scanning；
Using imaging device CT images are generated based on data of the detection device 2 in every rotation predetermined angle.
The CT imaging methods of the utility model are no longer based on spy in scanning means carries out non-uniform rotation scanning process
The total data reconstruct for surveying device 2 generates CT images, but the data based on detection device 2 in every rotation predetermined angle generate
CT images can effectively reduce anamorphose, improve detection accuracy.
The foregoing is merely the exemplary embodiments of the utility model, are not intended to limit the utility model, all in this reality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the utility model
Within protection domain.
Claims (9)
1. a kind of CT examination system, which is characterized in that including scanning means and imaging device, wherein：The scanning means has
Radiation source device (1) and detection device (2) simultaneously at least partly in the process non-at the uniform velocity turn be scanned object (a) to be checked
It is dynamic；The imaging device is based on effective detection data and generates CT images, and effective detection data is that the detection device (2) exists
Often rotate data acquired when predetermined angle.
2. CT examination system according to claim 1, which is characterized in that the CT examination system further includes rotating monitoring dress
It sets, the rotating monitoring device detects the rotation angle of the scanning means and often rotates preset angle in the detection device (2)
Signal is sent to the imaging device when spending, signal of the imaging device transmitted by the rotating monitoring device determines institute
State effective detection data.
3. CT examination system according to claim 2, which is characterized in that the rotating monitoring device includes position detection dress
Set (41) and rotating control assembly (42), the position detecting device (41) detect the scanning means to object (a) to be checked into
Position in row scanning process, is based on the testing result of the position detecting device (41), and the rotating control assembly (42) is true
The rotation angle of the fixed scanning means simultaneously sends letter when the scanning means often rotates predetermined angle to the imaging device
Number.
4. according to any CT examination systems of claim 1-3, which is characterized in that the imaging device includes data mining
Device and image processing apparatus (53), the data mining device obtain effective detection data and by effective detection numbers
According to described image processing unit (53) is transferred to, described image processing unit (53) picks up what device was transmitted based on the data
Effective detection data reconstruct generates CT images.
5. CT examination system according to claim 4, which is characterized in that the rotating monitoring device of the CT examination system exists
Signal is sent to the data mining device when detection device (2) often rotates predetermined angle, the data mining device will
The data of the detection device (2) corresponding with the signal of rotating monitoring device are transferred to as effective detection data
Described image processing unit (53).
6. CT examination system according to claim 4, which is characterized in that the data mining device includes data acquisition dress
(51) and image collecting device (52) are set, the data acquisition facility (51) obtains the total data of the detection device (2), institute
Image collecting device (52) is stated to select from the total data of the detection device (2) acquired in the data acquisition facility (51)
Effective detection data is taken to be transferred to described image processing unit (53).
7. CT examination system according to claim 6, which is characterized in that the rotating monitoring device of the CT examination system exists
When the detection device (2) often rotates predetermined angle signal, the data acquisition dress are sent to the data acquisition facility (51)
It sets (51) and the signal of the rotating monitoring device received is transferred to described image harvester (52), described image acquisition
Device (52) is using the data of the detection device (2) corresponding with the signal of rotating monitoring device as effective detection
Data transfer is to described image processing unit (53).
8. CT examination system according to claim 4, which is characterized in that the data mining device includes data acquisition dress
(51) and image collecting device (52) are set, the data acquisition facility (51) obtains effective detection data and will be described effective
Detection data is transferred to described image processing unit (53) via described image harvester (52).
9. CT examination system according to claim 8, which is characterized in that the rotating monitoring device of the CT examination system exists
When the detection device (2) often rotates predetermined angle signal, the data acquisition dress are sent to the data acquisition facility (51)
It sets (51) and obtains the data of the detection device (2) when receiving the signal of the rotating monitoring device as effective spy
Effective detection data is simultaneously transferred to described image processing unit (53) by measured data via described image harvester (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867131.5U CN207816865U (en) | 2017-12-28 | 2017-12-28 | CT examination system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721867131.5U CN207816865U (en) | 2017-12-28 | 2017-12-28 | CT examination system |
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| CN207816865U true CN207816865U (en) | 2018-09-04 |
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| CN201721867131.5U Withdrawn - After Issue CN207816865U (en) | 2017-12-28 | 2017-12-28 | CT examination system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226195A (en) * | 2017-12-28 | 2018-06-29 | 清华大学 | CT examination system and CT imaging methods |
-
2017
- 2017-12-28 CN CN201721867131.5U patent/CN207816865U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108226195A (en) * | 2017-12-28 | 2018-06-29 | 清华大学 | CT examination system and CT imaging methods |
| WO2019128523A1 (en) * | 2017-12-28 | 2019-07-04 | 清华大学 | Ct inspection system and ct imaging method |
| US11327198B2 (en) | 2017-12-28 | 2022-05-10 | Tsinghua University | CT inspection system and CT imaging method for a reciprocating swinging process of a radioactive source device and a detection device around an object at non-uniform speed to collect effective detection data |
| CN108226195B (en) * | 2017-12-28 | 2023-10-13 | 清华大学 | CT inspection system and CT imaging method |
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