CN108095749A - A kind of CT scan method, apparatus and system - Google Patents
A kind of CT scan method, apparatus and system Download PDFInfo
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- CN108095749A CN108095749A CN201611053132.6A CN201611053132A CN108095749A CN 108095749 A CN108095749 A CN 108095749A CN 201611053132 A CN201611053132 A CN 201611053132A CN 108095749 A CN108095749 A CN 108095749A
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- 238000000034 method Methods 0.000 title claims abstract description 74
- 238000002591 computed tomography Methods 0.000 title claims abstract description 60
- 230000005540 biological transmission Effects 0.000 claims 1
- 210000004072 lung Anatomy 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 7
- 238000003745 diagnosis Methods 0.000 description 5
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 210000000056 organ Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010408 sweeping Methods 0.000 description 3
- 238000003325 tomography Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 238000009432 framing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002910 structure generation Methods 0.000 description 1
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- 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
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5205—Devices using data or image processing specially adapted for radiation diagnosis involving processing of raw data to produce diagnostic data
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Abstract
The embodiment of the invention discloses a kind of CT scan method, including：Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase；The first plain film image is obtained, the first plain film image is that the data scanned according to plain film generate；Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image；When the plain film, which scans, reaches first predeterminated position, stop the plain film scanning, into the second sweep phase, tomoscan or helical scanning are performed in second sweep phase.CT scan method provided in an embodiment of the present invention only need to perform single pass process, can be achieved with treating the positioning of scanned position and obtain the faultage image at position to be scanned, reduce the x-ray dose that patient receives.
Description
Technical field
The present invention relates to technical field of medical equipment more particularly to a kind of CT scan method, apparatus and system.
Background technology
CT (Computed Tomography), i.e. CT scan, it is the X-ray beam using Accurate collimation,
Tomoscan or helical scanning are carried out to the position around a certain position of human body together with the high detector of sensitivity, obtained
The faultage image of this, for the inspection of a variety of diseases.
In general, when carrying out CT scan for patient, operating personnel can scan the plain film figure for obtaining patient by plain film first
As after, pass through plain film framing patient position to be scanned.Again tomoscan or helical scanning are begun through from the position of positioning
Obtain required position faultage image.Then, doctor diagnoses the state of an illness of patient according to the faultage image.Plain film image is only
It is to play the role of during CT scan scanned position to position, whens diagnosis will not use these plain film images.So,
When plain film scans, patient has just received some with diagnosing incoherent extra x-ray dose.
Therefore, those skilled in the art need to provide a kind of CT scan method, apparatus and system, can not influence to scan
In the case of spots localization accuracy, the x-ray dose that patient receives is reduced.
The content of the invention
It, can be in not shadow the present invention provides a kind of CT scan method, apparatus and system in order to solve prior art problem
In the case of ringing scanned position positional accuracy, the x-ray dose that patient receives is reduced.
CT scan method provided in an embodiment of the present invention, including：
Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase；
The first plain film image is obtained, the first plain film image is that the data scanned according to plain film generate；
Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image；
When the plain film, which scans, reaches first predeterminated position, stop the plain film scanning, into the second scanning rank
Section performs tomoscan or helical scanning in second sweep phase.
Preferably, judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image, specifically
Including：
The characteristics of image in the first plain film image predeterminable area is obtained, obtains the First Eigenvalue；
When the First Eigenvalue falls in the first pre-set interval, it is default to determine that the plain film scanning reaches described first
Position.
Preferably, when into second sweep phase, the method is further included：
The second plain film image is obtained, the second plain film image is according to the data scanned in the second sweep phase
Generation；
Judge whether the scanning performed in the second sweep phase reaches the second default position according to the second plain film image
It puts；
When the scanning performed in the second sweep phase reaches the second predeterminated position, stop scanning.
Preferably, judge whether the scanning performed in the second sweep phase reaches second according to the second plain film image
Predeterminated position specifically includes：
The characteristics of image in the second plain film image predeterminable area is obtained, obtains Second Eigenvalue；
When the Second Eigenvalue falls in the second pre-set interval, determine it is described performed in the second sweep phase sweep
It retouches and reaches second predeterminated position.
Preferably, when into second sweep phase, the method is further included：
Obtain in the scan protocols of plain film scanning default second sweep phase sweep length and described second
The sweep length performed in sweep phase；
The sweep length and the default sweep length in the scan protocols for comparing the execution；
When the sweep length of the execution is greater than or equal to default sweep length in the scan protocols, stop sweeping
It retouches.
Preferably, when into second sweep phase, the method is further included：
Obtain in the scan protocols of plain film scanning default second sweep phase sweep length and described second
The sweep length performed in sweep phase；
When the sweep length performed in the second sweep phase is less than default sweep length but institute in the scan protocols
It states when scanning has reached the second predeterminated position or when the sweep length performed in the second sweep phase is more than or equal to described
The default sweep length but scanning when reaching second predeterminated position not yet in scan protocols, sends scanning and stops carrying
Show.
CT scan device provided in an embodiment of the present invention, including：Scan control module, image collection module and judge mould
Block；
The scan control module for starting to scan, into the first sweep phase, is held in first sweep phase
Row plain film scans；When the judgment module judges that the plain film scanning reaches first predeterminated position, stop the plain film
Scanning into the second sweep phase, performs tomoscan or helical scanning in second sweep phase；
Described image rebuilds module, and the data for being scanned according to the plain film generate the first plain film image；
The judgment module, it is default for judging whether the plain film scanning reaches first according to the first plain film image
Position.
Preferably, the judgment module, is specifically used for：
The characteristics of image in the first plain film image predeterminable area is obtained, obtains the First Eigenvalue；
Judge whether the First Eigenvalue falls in the first pre-set interval；
When the First Eigenvalue falls in first pre-set interval, determine that the plain film scanning reaches described first
Predeterminated position.
Preferably, described image rebuilds module, is additionally operable to according to the data scanned in second sweep phase
Generate the second plain film image；
The judgment module is additionally operable to judge what is performed in second sweep phase according to the second plain film image
Whether scanning reaches the second predeterminated position；When the scanning for judging to perform in the second sweep phase reaches second predeterminated position
When, the scan control module is notified to stop scanning.
Preferably, the judgment module, also particularly useful for；
The characteristics of image in the second plain film image predeterminable area is obtained, obtains Second Eigenvalue；
Judge whether the Second Eigenvalue falls in the second pre-set interval；
When judging that the Second Eigenvalue falls in second pre-set interval, determine described in the described second scanning rank
The scanning performed in section reaches second predeterminated position.
Preferably, described device further includes：
Acquisition module, for obtain in the scan protocols of plain film scanning default second sweep phase sweep length with
And the sweep length performed in second sweep phase；
Whether the judgment module, the sweep length for being additionally operable to judge to perform in second sweep phase are more than or wait
The default sweep length in the plain film scan protocols；When judge second sweep phase perform sweep length be more than
Or equal to the scan control module during default sweep length, is notified to stop scanning in the plain film scan protocols.
Preferably, described device further includes：
Acquisition module, for obtain in the scan protocols of plain film scanning default second sweep phase sweep length with
And the sweep length performed in second sweep phase；
Reminding module, for being less than when the sweep length performed in the second sweep phase in the plain film scan protocols in advance
If sweep length but the scanning when having reached the second predeterminated position or when the scanning that performed in the second sweep phase is grown
Degree reaches described second and presets not yet more than or equal to default sweep length in the plain film scan protocols but the scanning
During position, send scanning and stop prompting.
CT scan system provided in an embodiment of the present invention, including：Memory and processor；
Said program code for storing program code, and is transmitted to the processor by the memory；
The processor for the instruction in said program code, performs following steps：
Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase；
The first plain film image is obtained, the first plain film image is that the data scanned according to plain film generate；
Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image；
When the plain film, which scans, reaches first predeterminated position, stop the plain film scanning, into the second scanning rank
Section performs tomoscan or helical scanning in second sweep phase.
Compared with prior art, the present invention has at least the following advantages：
CT scan method provided in an embodiment of the present invention during single pass, is first swept by the way of plain film scanning
Retouch patient.During plain film scans, the data scanned in real time according to plain film build picture, obtain the first plain film image.
With the progress that plain film scans, real-time update the first plain film image, more and more body parts appear in the first plain film image
In.According to the first plain film image, the position that plain film scans may recognize that, judge whether plain film scanning reaches on this basis
The starting position at the first predeterminated position, i.e. patient position to be scanned.When judging that plain film scanning reaches the first predeterminated position, stop
The only plain film scanning, starts the position after scanning the first predeterminated position by the way of tomoscan or helical scanning, i.e.,
Position to be scanned.The data obtained according to tomoscan or helical scanning are built as the faultage image with regard to that can obtain position to be scanned.
CT scan method provided in an embodiment of the present invention only need to perform single pass process, can be achieved with treating the positioning of scanned position
And the faultage image at position to be scanned is obtained, reduce the x-ray dose that patient receives.
Description of the drawings
It in order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the flow diagram of CT scan embodiment of the method provided by the invention；
Fig. 2 is a kind of flow diagram for stopping scan method in CT scan method provided in an embodiment of the present invention；
Fig. 3 is the structure diagram of CT scan device embodiment provided by the invention；
Fig. 4 is the structure diagram of CT scan system embodiment provided by the invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing, it is clear that described embodiment is only this
Invention part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
All other embodiments obtained under the premise of creative work are not made, belong to the scope of protection of the invention.
Before the specific embodiment of the present invention is introduced, introduce first relevant multiple with the specific embodiment of the invention
Technical term.
Plain film scans：Rack is static during scanning, while radiates X-ray, scanning bed movement.When patient lies low on scanning bed
When, the data that plain film scans are reconstructed, obtain the patient parallel to scanning bed scan image, i.e. plain film image.Pass through
Plain film image can determine the position of each organ in patient body.
Tomoscan：During scanning, rack rotates and radiates X-ray, scanning bed not move.When patient is lain on scanning bed
When, the data that tomoscan obtains are reconstructed, obtain the patient perpendicular to scanning bed scan image, i.e. faultage image.Tomography
Image does not include the location information of scanning in itself, but while building picture can preserve the corresponding location information of faultage image.
Helical scanning：During scanning, rack rotates and radiates X-ray, while scanning bed movement.Image space method is built in helical scanning
Build that image space method is different from tomoscan, but its obtained image is similar with the image of tomoscan.
Scan protocols：Carry scanning various parameters set used (the voltage and current value such as used in scanning) and
It builds as various parameters set used.During actual motion, CT equipment works according to pre-set scan protocols.
Existing CT scan method treats scanned position and has carried out twice sweep.First, a plain film scanning and root are performed
After the data generation plain film image of plain film scanning, the position at actual position to be scanned is determined according to the plain film image.Afterwards, root
According to the position at position to be scanned on plain film image, the initial position of tomoscan or helical scanning etc. is determined, then perform and once break
Layer scanning or helical scanning.Doctor is diagnosed according to the faultage image that tomoscan or helical scanning generate.At this moment, Bing Renshi
The irradiation of the extra x-ray dose for plain film scanning unrelated with diagnosis has been received on border.
In order to reduce the x-ray dose of patient's receiving, an embodiment of the present invention provides a kind of CT scan methods, only carry out one
Secondary scanning.For including the region to be scanned at position to be scanned, before scanning to position to be scanned, plain film scanning is first carried out simultaneously
The data obtained in real time according to plain film scanning are established and update plain film image in real time.Known again by the plain film image of real-time update
The position that other plain film scanning reaches.When identifying that plain film scanning reaches the starting position at position to be scanned, switch to tomography and sweep
It retouches or the modes such as helical scanning is treated scanned position and are scanned, obtain the faultage image needed for diagnosis.In this way, it is obtaining
During the faultage image at position to be scanned, it is only necessary to treat scanned position and perform single pass process, reduce disease
The x-ray dose that people receives.
Based on above-mentioned thought, in order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to
Attached drawing is described in detail the specific embodiment of the present invention.
Embodiment of the method：
Referring to Fig. 1, which is the flow diagram of CT scan embodiment of the method provided by the invention.
CT scan method provided in this embodiment, including：
Step 101：Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase.
It is understood that during plain film scans, it is static for fixing the rack of x-ray source and detector, and
It is scanning bed to be moved to complete the positioning for treating scanned position with the propulsion of scanning process.
Step 102：The first plain film image is obtained, the first plain film image is the data scanned according to the plain film
Generation.
According to the data that building of being carried in plain film scan protocols obtains in real time as parameter and plain film scanning, can be swept in plain film
Image reconstruction is carried out during retouching in real time, obtains the first plain film image.With the progress that plain film scans, scanned position
Gradually increase, the first plain film image scans to obtain the increase real-time update of data with plain film, i.e. is presented on the first plain film image
Go out more and more positions.
Step 103：Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image.
It is understood that the feature difference that each position or organ show in plain film image in human body is larger, i.e., not
Different characteristics of image is showed in plain film image with organ, can be identified in plain film image by foundation of characteristics of image
Privileged site.As an example, any one image identification method may be employed to extract image spy in those skilled in the art
It levies and then determines the position occurred in the first plain film image, such as method for identification of edge.
Therefore, by the characteristics of image of the first plain film image, it can determine in the first plain film image whether occur waiting to sweep
The starting position at position is retouched, so that it is determined that whether plain film scanning reaches the starting position at position to be scanned, the position to be scanned
Starting position i.e. the first predeterminated position.Such as：When position to be scanned is lung, during practical operation, the first plain film is obtained first
The characteristics of image of image further according to characteristics of image when occurring lung starting position in the first plain film image being previously obtained, is sentenced
Whether disconnected first plain film image shows the starting position of lung, to determine whether plain film scanning has arrived at the start bit of lung
It puts.Those skilled in the art can specifically set the starting position at position to be scanned according to actual conditions.
During plain film scans, with the carry out real-time update of plain film scanning during the first plain film image, therefore
When obtaining the characteristics of image of the first plain film image, the characteristics of image in the first plain film image latest update region need to be only extracted, i.e.,
It can determine whether out the position that plain film scanning reaches, shorten the time for the characteristics of image for obtaining the first plain film image.
Specifically, in one example, step 103 can include：It obtains in the first plain film image predeterminable area
Characteristics of image obtains the First Eigenvalue；When the First Eigenvalue falls in the first pre-set interval, first plain film is determined
Scanning reaches first predeterminated position.
Explanation is needed exist for, in practical operation, the first plain film image is updated from top to bottom.Therefore, should
Predeterminable area can be the region at least a line (such as 1-10 rows) pixel composition for including the first predeterminated position.Characteristics of image can be with
For the gray scale of pixel, the First Eigenvalue is the gray scale accumulated value or gray average of whole pixels in the predeterminable area.
Step 104：When the plain film, which scans, reaches first predeterminated position, stop plain film scanning, into the
Two sweep phases perform tomoscan or helical scanning in second sweep phase.
It is scanning bed to stop movement when identifying that plain film scanning reaches default position to be scanned, and stop plain film scanning,
Subsequent position to be scanned is scanned using tomoscan or the method for helical scanning again.
It should be noted that plain film scanning and tomography or helical scanning need to use identical collimation scope (such as 128 ×
0.625mm).The scope of X-ray radiation open country caused by collimator in scope, that is, CT equipment is collimated, influences primary emission X-ray
The body scale scanned.
It, after step 104, can also be to tomoscan or helical scanning in the present embodiment preferred embodiment
Stop position is set, and determines the stop position of present scan, to ensure completely to get the tomograph at position to be scanned
As and patient do not receive extra x-ray bombardment.
During specific implementation, stop the method for scanning at least there are three types of possible realization method, retouched in detail separately below
It states.
The first possible realization method is performed according to being set in advance in plain film scan protocols in the second sweep phase
Sweep length stop scanning.When the sweep length that the second sweep phase performs is greater than or equal to preset sweep length
When, that is, stop scanning.
Specifically, CT scan method provided in this embodiment, after step 104, further includes：Obtain the plain film scanning
Scan protocols in default second sweep phase sweep length and actually performed in the second sweep phase described
Sweep length；Compare the sweep length actually performed and the default sweep length in the plain film scan protocols；Work as institute
The sweep length of execution is stated more than or equal to during default sweep length, stopping scans in the scan protocols.
Such as when position to be scanned is lung, then after the plain film scan protocols for selecting scanning lung in doctor, plain film
Scan protocols, with reference to the standard information of human organ size, can provide the maximum that the plain film of recommendation scans according to the height of patient
Sweep length.It is understood that the sweep length given when plain film scans in scan protocols is the maximum length model of lung
It encloses, therefore the sweep length performed in the second sweep phase usually should not exceed the sweep length given in plain film scan protocols.
Certainly, doctor can also reselect the sweep length of lung.
Second of possible realization method, according to the end position that position to be scanned is detected during actual scanning come really
It is fixed whether to need to stop scanning.
Specifically, as shown in Fig. 2, CT scan method provided in this embodiment, further comprising the steps of after step 104
201- steps 203.
Step 201：The second plain film image is obtained, the second plain film image is that basis is swept in second sweep phase
The data generation retouched.
Explanation is needed exist for, tomoscan, the data of helical scanning can be used for structure generation plain film image.Specifically
Ground, when performing tomoscan or helical scanning every time, detector around movement of patient, obtains one group around data.With sweeping
The movement of bed is retouched, obtains multigroup circular data, every group surround data after image reconstruction, available corresponding position in patient body
Faultage image.Data in comprehensive multigroup circular data in the range of predetermined angle, can rebuild to obtain the patient and be located at preset angle
Plain film image in the range of degree.In this way, the second plain film image can be generated according to the data that tomoscan or helical scanning obtain.
It should be noted that the first plain film image and the second plain film image can be the different zones of an image or two
Different images.
For example, when performing helical scanning to patient head, rack rotates and radiates X-ray, while scanning bed movement, obtains
To multigroup circular data, every group of faultage image that can obtain head different position after data reconstruction.Afterwards, determine head just
The angular range in face surround data middle position in the data in the angular range, the method that image reconstruction may be employed according to every group
Obtain the plain film image of head front, i.e. the second plain film image.
Step 202：Whether arrived according to the scanning that the second plain film image judges to perform in second sweep phase
Up to the second predeterminated position.
Similarly, with the characteristics of image foundation of the second plain film image of real-time update, it may be determined that in the second sweep phase
Whether the scanning of execution reaches the end position at position to be scanned, end position i.e. second predeterminated position at the position to be scanned.
For example, when position to be scanned is lung, the second predeterminated position can be the end position of lung.Those skilled in the art may be used also
It is specific to set the second predeterminated position with the specific scanning needs according to this CT scan.
Second plain film image be with the carry out real-time update scanned in the second sweep phase, it is therefore second flat obtaining
During the characteristics of image of picture, characteristics of image in the second plain film image latest update region need to be only extracted, you can judge the
The time for the characteristics of image for obtaining the second plain film image is shortened in the position that the scanning performed in two sweep phases is reached.
As an example, whether arrived according to the scanning that the second plain film image judges to perform in second sweep phase
Include up to the second predeterminated position：The characteristics of image in the second plain film image predeterminable area is obtained, obtains Second Eigenvalue；When
When the Second Eigenvalue is fallen in the second pre-set interval, determine that the scanning performed in second sweep phase reaches
Second predeterminated position.
It is understood that characteristics of image can be the gray scale of pixel, the First Eigenvalue is whole in the predeterminable area
The gray scale accumulated value or gray average of pixel.
Step 203：When the scanning performed in second sweep phase reaches second predeterminated position, stop
Only scan.
When identifying that tomoscan reaches the second predeterminated position, you can determine to have completed to treat the scanning of scanned position.
At this point, stopping tomoscan can ensureing that patient does not receive extra x-ray bombardment.
The third possible realization method is the combination of the possible realization method of above two.
Specifically, CT scan method provided in this embodiment, further includes following steps after step 104：Described in acquisition
It default second sweep phase sweep length and is performed in the scan protocols of plain film scanning in second sweep phase
Sweep length is less than default sweep length but institute in the scan protocols when the sweep length performed in the second sweep phase
It states when scanning has reached the second predeterminated position or when the sweep length performed in the second sweep phase is more than or equal to described
The default sweep length but scanning when reaching second predeterminated position not yet in scan protocols, sends scanning and stops carrying
Show.
Explanation is needed exist for, when judging in scanning the second predeterminated position of arrival that the second sweep phase performs,
It then can determine that present scan has in the process scanned complete position to be scanned.It is treated however, doctor may also need to obtain
The faultage image of the rear region of scanned position is to improve the accuracy of diagnosis.In general, doctor can be by scan protocols
Sweep length is set to realize the scanning for the rear region for treating scanned position.Therefore, the scanning performed in the second sweep phase is arrived
When being less than default sweep length in the scan protocols up to second predeterminated position but the sweep length of the execution, pass through
It sends scanning and stops prompting, doctor is allowed to determine the need for stopping scanning.When doctor determines to stop, then stop scanning；Work as doctor
When raw selection continues to scan on, then continue to scan on until the sweep length of execution is greater than or equal to default in the scan protocols sweep
Stop scanning when retouching length.In this way, the special scanning demand of doctor can be met, treat the region after scanned position and swept
It retouches.
It should also be noted that, when the sweep length performed in the second sweep phase is greater than or equal to the scan protocols
In default sweep length when, that is, illustrate to have scanned through region of the length for the sweep length of doctor's setting.However, at this time
The scanning performed in two sweep phases does not reach second predeterminated position (end position at position to be scanned) also, i.e., second
The scanning performed in sweep phase does not complete the scanning to entire position (such as entire lung) to be scanned.It, can if stopping scanning
It can cause the faultage image that complete position to be scanned has not been obtained because of the setting mistake of sweep length, influence doctor couple
The diagnosis of patient's state of an illness.At this moment, it is greater than or equal to default scanning length in the scan protocols in the sweep length of the execution
The degree but scanning performed in the second sweep phase is not when reaching second predeterminated position, stops carrying by sending scanning
Show, doctor is allowed to determine the need for stopping scanning.When doctor determines to stop, then stop scanning；When doctor's selection continues to scan on
When, then it continues to scan on and stops scanning when scanning to the second predeterminated position.So, it is ensured that needing, position to be scanned is complete
During faultage image, the complete complete faultage image in position to be scanned is got.
When it is implemented, whether the prompting frame that can be stopped by popping up scanning on scan control interface, prompt doctor
It needs to continue to scan on.When doctor selects to stop, stopping scanning.When doctor's selection continues to scan on, then according in scan protocols
Default sweep length detects the end position at position to be scanned to stop scanning during actual scanning.
CT scan method provided in this embodiment during single pass, first scans disease by the way of plain film scanning
People.During plain film scans, the data scanned in real time according to plain film build picture, obtain the first plain film image.With
The progress of plain film scanning, real-time update the first plain film image, more and more body parts are appeared in the first plain film image.Root
According to the first plain film image, the position that plain film scans may recognize that, judge whether plain film scanning reaches first on this basis
The starting position at predeterminated position, i.e. patient position to be scanned.When judging that plain film scanning reaches the first predeterminated position, stop institute
Plain film scanning is stated, starts the position after scanning the first predeterminated position by the way of tomoscan or helical scanning, that is, waits to sweep
Retouch position.The data obtained according to tomoscan or helical scanning are built as the faultage image with regard to that can obtain position to be scanned.This hair
The CT scan method that bright embodiment provides only need to perform single pass process, can be achieved with treating the positioning of scanned position and obtain
The faultage image at position to be scanned is obtained, reduces the x-ray dose that patient receives.
Based on the CT scan method that above-described embodiment provides, the embodiment of the present invention additionally provides a kind of CT scan device.
Device embodiment：
Referring to Fig. 3, which is the structure diagram of CT scan device embodiment provided by the invention.
CT scan device provided in this embodiment, including：Scan control module 100, image reconstruction module 200 and judge mould
Block 300；
The scan control module 100, for starting to scan, into the first sweep phase, in first sweep phase
Middle execution plain film scanning；When the judgment module 300 judges that the plain film scanning reaches first predeterminated position, stop institute
Plain film scanning is stated, into the second sweep phase, tomoscan or helical scanning are performed in second sweep phase.
Described image rebuilds module 200, and the data for being scanned according to the plain film generate the first plain film image；
The judgment module 300, for judging whether the plain film scanning reaches first according to the first plain film image
It is default.
In one example, the judgment module 300, is specifically used for：It obtains in the first plain film image predeterminable area
Characteristics of image, obtain the First Eigenvalue；Judge whether the First Eigenvalue falls in the first pre-set interval；When described in judgement
When the First Eigenvalue is fallen in first pre-set interval, determine that the plain film scanning reaches first predeterminated position.
Described image rebuilds module 200, is additionally operable to according to the data generation scanned in second sweep phase
Second plain film image；
In some possible realization methods of the present embodiment, the judgment module 300 is additionally operable to flat according to described second
Whether the scanning that picture judges to perform in second sweep phase reaches the second predeterminated position；When judging described second
When the scanning performed in sweep phase reaches second predeterminated position, the scan control module is notified to stop scanning.
In one example, the judgment module is specifically used for：Obtain the figure in the second plain film image predeterminable area
As feature, Second Eigenvalue is obtained；Judge whether the Second Eigenvalue falls in the second pre-set interval；When judging described second
When characteristic value is fallen in second pre-set interval, determine described in the scanning arrival performed in second sweep phase
Second predeterminated position.
In some possible realization methods of the present embodiment, the CT scan device further includes：Acquisition module is used for
It obtains in the scan protocols of the plain film scanning and presets the sweep length of the second sweep phase and in second sweep phase
The sweep length of middle execution.
The judgment module 300, be additionally operable to judge whether to be more than in the sweep length that second sweep phase performs or
Equal to default sweep length in the plain film scan protocols；When judging that it is described that the sweep length in the execution is greater than or equal to
In scan protocols during default sweep length, the scan control module is notified to stop scanning.
In some possible realization methods of the present embodiment, the CT scan device further includes：
Acquisition module, for presetting the scanning of the second sweep phase setup module in the scan protocols that are scanned in the plain film
Length and the sweep length performed in second sweep phase；Reminding module is held for working as in the second sweep phase
Capable sweep length is less than when default sweep length but scanning have reached the second predeterminated position in the scan protocols or works as
The sweep length performed in the second sweep phase is greater than or equal to default sweep length in the scan protocols but scanning is also
When not reaching second predeterminated position, send scanning and stop prompting.
CT scan device provided in this embodiment, during single pass, scan control module is first scanned using plain film
Mode scan patient.During plain film scans, the data scanned in real time according to plain film build picture, and it is flat to obtain first
Picture.With the progress that plain film scans, real-time update the first plain film image, it is flat that more and more body parts appear in first
In picture.According to the first plain film image, the position that plain film scans may recognize that, judge that plain film scanning is on this basis
The no starting position for reaching the first predeterminated position, i.e. patient position to be scanned.When the first judgment module judges that plain film scanning is arrived
During up to the first predeterminated position, scan control module stops the plain film scanning, starts the side using tomoscan or helical scanning
Formula scans the position after the first predeterminated position, i.e., position to be scanned.It is built according to the data that tomoscan or helical scanning obtain
As the faultage image with regard to position to be scanned can be obtained.CT scan device provided in an embodiment of the present invention only need to perform single pass
Process can be achieved with treating the positioning of scanned position and obtain the faultage image at position to be scanned, reduce the X that patient receives
Roentgen dose X.
Based on the CT scan method and apparatus that above-described embodiment provides, the embodiment of the present invention additionally provides a kind of CT scan system
System.
System embodiment：
Referring to Fig. 4, which is the structure diagram of CT scan system embodiment provided by the invention.
CT scan system provided in this embodiment, including：Memory 10 and processor 20；
Said program code is transmitted to the processor 20 by the memory 10 for storing program code；
The processor 20 performs following steps for the instruction in said program code：Start to scan, into
One sweep phase performs plain film scanning in first sweep phase；Obtain the first plain film image, the first plain film image
It is that the data scanned according to plain film generate；Judge whether plain film scanning reaches the according to the first plain film image
One predeterminated position；When the plain film, which scans, reaches first predeterminated position, stop the plain film scanning, into the second scanning
Stage performs tomoscan or helical scanning in second sweep phase.
In the present embodiment in some possible realization methods, instruction of the processor 20 in said program code,
Also perform following steps：The characteristics of image in the first plain film image predeterminable area is obtained, obtains the First Eigenvalue；When described
When the First Eigenvalue is fallen in the first pre-set interval, determine that the plain film scanning reaches first predeterminated position.
In the present embodiment in some possible realization methods, instruction of the processor 20 in said program code,
Also perform following steps：The second plain film image is obtained, the second plain film image is that basis scans in the second sweep phase
The data generation arrived；Judge whether the scanning performed in the second sweep phase reaches second according to the second plain film image
Predeterminated position；When the scanning performed in the second sweep phase reaches the second predeterminated position, stop scanning.
Specifically, in one example, instruction of the processor 20 in said program code performs following steps：It obtains
The characteristics of image in the second plain film image predeterminable area is taken, obtains Second Eigenvalue；When the Second Eigenvalue falls
When in two pre-set intervals, determine that the scanning performed in the second sweep phase reaches second predeterminated position.
In the present embodiment in some possible realization methods, instruction of the processor 20 in said program code,
Also perform following steps：The sweep length of the second sweep phase is preset in the scan protocols of plain film scanning；It obtains in institute
State the sweep length performed in the second sweep phase；Compare the sweep length of the execution and in the scan protocols it is default
Sweep length；When the sweep length of the execution is greater than or equal to default sweep length in the scan protocols, stop sweeping
It retouches.
In the present embodiment in some possible realization methods, instruction of the processor 20 in said program code,
Also perform following steps：Obtain in the scan protocols of plain film scanning default second sweep phase sweep length and in institute
State the sweep length performed in the second sweep phase；It is assisted when the sweep length performed in the second sweep phase is less than the scanning
Default sweep length but scanning is when having reached the second predeterminated position or when the scanning that performed in the second sweep phase in view
Length is greater than or equal to default sweep length in the scan protocols but scanning when reaching second predeterminated position not yet,
It sends scanning and stops prompting.
CT scan system provided in this embodiment first scans disease during single pass by the way of plain film scanning
People.During plain film scans, the data scanned in real time according to plain film build picture, obtain the first plain film image.With
The progress of plain film scanning, real-time update the first plain film image, more and more body parts are appeared in the first plain film image.Root
According to the first plain film image, the position that plain film scans may recognize that, judge whether plain film scanning reaches first on this basis
The starting position at predeterminated position, i.e. patient position to be scanned.When judging that plain film scanning reaches the first predeterminated position, stop flat
Piece scans, and starts the position after scanning the first predeterminated position by the way of tomoscan or helical scanning, i.e., portion to be scanned
Position.The data obtained according to tomoscan or helical scanning are built as the faultage image with regard to that can obtain position to be scanned.It is of the invention real
The CT scan system of example offer is provided, only single pass process need to be performed, can be achieved with treating the positioning of scanned position and treated
The faultage image of scanned position reduces the x-ray dose that patient receives.
It should be noted that each embodiment is described by the way of progressive in this specification, each embodiment emphasis is said
Bright is all difference from other examples, and just to refer each other for identical similar portion between each embodiment.For reality
For applying device and system disclosed in example, since it is corresponded to the methods disclosed in the examples, so description is fairly simple, it is related
Part is referring to method part illustration.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
It can directly be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention.Though
So the present invention is disclosed above with preferred embodiment, however is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, without departing from the scope of the technical proposal of the invention, all using the methods and technical content of the disclosure above to the present invention
Technical solution makes many possible changes and modifications or is revised as the equivalent embodiment of equivalent variations.Therefore, it is every without departing from
The content of technical solution of the present invention, technical spirit according to the invention is to any simple modification made for any of the above embodiments, equivalent
Variation and modification, still fall within technical solution of the present invention protection in the range of.
Claims (13)
- A kind of 1. CT scan method, which is characterized in that including：Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase；The first plain film image is obtained, the first plain film image is that the data scanned according to plain film generate；Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image；When the plain film, which scans, reaches first predeterminated position, stop plain film scanning, into the second sweep phase, Tomoscan or helical scanning are performed in second sweep phase.
- 2. CT scan method according to claim 1, which is characterized in that judged according to the first plain film image described flat Whether piece scanning reaches the first predeterminated position, specifically includes：The characteristics of image in the first plain film image predeterminable area is obtained, obtains the First Eigenvalue；When the First Eigenvalue falls in the first pre-set interval, determine that the plain film scanning reaches the described first default position It puts.
- 3. CT scan method according to claim 1 or 2, which is characterized in that when into second sweep phase, institute The method of stating further comprises：The second plain film image is obtained, the second plain film image is according to the data generation scanned in the second sweep phase 's；Judge whether the scanning performed in the second sweep phase reaches the second predeterminated position according to the second plain film image；When the scanning performed in the second sweep phase reaches the second predeterminated position, stop scanning.
- 4. CT scan method according to claim 3, which is characterized in that judged according to the second plain film image second Whether the scanning performed in sweep phase reaches the second predeterminated position, specifically includes：The characteristics of image in the second plain film image predeterminable area is obtained, obtains Second Eigenvalue；When the Second Eigenvalue falls in the second pre-set interval, determine that the scanning performed in the second sweep phase is arrived Up to second predeterminated position.
- 5. CT scan method according to claim 1 or 2, which is characterized in that when into second sweep phase, institute The method of stating further comprises：It obtains default second sweep phase sweep length in the scan protocols of the plain film scanning and is scanned described second The sweep length performed in stage；The sweep length and the default sweep length in the scan protocols for comparing the execution；When the sweep length of the execution is greater than or equal to default sweep length in the scan protocols, stop scanning.
- 6. CT scan method according to claim 1 or 2, which is characterized in that when into second sweep phase, institute The method of stating further comprises：It obtains default second sweep phase sweep length in the scan protocols of the plain film scanning and is scanned described second The sweep length performed in stage；When the sweep length performed in the second sweep phase is less than default sweep length in the scan protocols but described sweeps It retouches when having reached the second predeterminated position or when the sweep length performed in the second sweep phase is greater than or equal to the scanning The default sweep length but scanning when reaching second predeterminated position not yet in agreement, sends scanning and stops prompting.
- 7. a kind of CT scan device, which is characterized in that including：Scan control module, image collection module and judgment module；The scan control module for starting to scan, into the first sweep phase, performs flat in first sweep phase Piece scans；When the judgment module judges that the plain film scanning reaches first predeterminated position, stop the plain film scanning, Into the second sweep phase, tomoscan or helical scanning are performed in second sweep phase；Described image rebuilds module, and the data for being scanned according to the plain film generate the first plain film image；The judgment module, for judging whether the plain film scanning reaches the first default position according to the first plain film image It puts.
- 8. CT scan device according to claim 7, which is characterized in that the judgment module is specifically used for：The characteristics of image in the first plain film image predeterminable area is obtained, obtains the First Eigenvalue；Judge whether the First Eigenvalue falls in the first pre-set interval；When the First Eigenvalue falls in first pre-set interval, it is default to determine that the plain film scanning reaches described first Position.
- 9. the CT scan device according to claim 7 or 8, which is characterized in thatDescribed image rebuilds module, is additionally operable to generate the second plain film according to the data scanned in second sweep phase Image；The judgment module is additionally operable to judge the scanning performed in second sweep phase according to the second plain film image Whether second predeterminated position is reached；When the scanning for judging to perform in the second sweep phase reaches second predeterminated position, The scan control module is notified to stop scanning.
- 10. CT scan device according to claim 9, which is characterized in that the judgment module is additionally operable to；The characteristics of image in the second plain film image predeterminable area is obtained, obtains Second Eigenvalue；Judge whether the Second Eigenvalue falls in the second pre-set interval；When judging that the Second Eigenvalue falls in second pre-set interval, determine described in second sweep phase The scanning of execution reaches second predeterminated position.
- 11. the CT scan device according to claim 7 or 8, which is characterized in that described device further includes：Acquisition module, for obtain in the scan protocols of plain film scanning default second sweep phase sweep length and The sweep length performed in second sweep phase；The judgment module is additionally operable to judge whether the sweep length performed in second sweep phase is greater than or equal to institute State default sweep length in plain film scan protocols；Be more than when the sweep length for judging to perform in second sweep phase or Stop scanning equal to the scan control module during default sweep length, is notified in the plain film scan protocols.
- 12. the CT scan device according to claim 7 or 8, which is characterized in that described device further includes：Acquisition module, for obtain in the scan protocols of plain film scanning default second sweep phase sweep length and The sweep length performed in second sweep phase；Reminding module, for being less than default scanning in the scan protocols when the sweep length performed in the second sweep phase Length but the scanning be more than when having reached the second predeterminated position or when the sweep length that performed in the second sweep phase or Equal to default sweep length in the scan protocols but it is described scanning reach second predeterminated position not yet when, transmission is swept Retouch stopping prompting.
- 13. a kind of CT scan system, which is characterized in that including：Memory and processor；Said program code for storing program code, and is transmitted to the processor by the memory；The processor for the instruction in said program code, performs following steps：Start to scan, into the first sweep phase, plain film scanning is performed in first sweep phase；The first plain film image is obtained, the first plain film image is that the data scanned according to plain film generate；Judge whether the plain film scanning reaches the first predeterminated position according to the first plain film image；When the plain film, which scans, reaches first predeterminated position, stop plain film scanning, into the second sweep phase, Tomoscan or helical scanning are performed in second sweep phase.
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