CN107468266A - A kind of scan method and Medical Devices - Google Patents
A kind of scan method and Medical Devices Download PDFInfo
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- CN107468266A CN107468266A CN201710552950.9A CN201710552950A CN107468266A CN 107468266 A CN107468266 A CN 107468266A CN 201710552950 A CN201710552950 A CN 201710552950A CN 107468266 A CN107468266 A CN 107468266A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 125000006850 spacer group Chemical group 0.000 claims abstract description 39
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- 238000000605 extraction Methods 0.000 abstract description 2
- 238000002059 diagnostic imaging Methods 0.000 description 16
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- 238000005259 measurement Methods 0.000 description 8
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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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
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
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Abstract
The application provides a kind of scan method, and this method positions sheet data for the history of extraction check object；The history spacer data include positioning check object execution the history distance between the history scanning range and check object and the first references object when scanning obtained history spacer, scanning check object execution positioning；In the Current Scan stage, the current distance between check object and the second references object is obtained；According to history distance, the current distance between the check object and the second references object and the history scanning range between the check object and the first references object, the Current Scan scope in Current Scan stage is determined；Check object is scanned according to the history spacer and the Current Scan scope.The application also provides a kind of Medical Devices, can perform scan method.
Description
Technical field
The application is related to medical instruments field, more particularly to a kind of scan method of medical instruments field and uses this method
Medical Devices.
Background technology
The spacer of medical imaging equipment is also referred to as plain film, is that medical imaging equipment obtains before follow up scan inspection is carried out
The preliminary image obtained, for marking specific scanning range and position for follow-up scanning.But medical imaging equipment shooting positioning
Piece can generally also make check object by certain dose of radiation.
In practical application scene, same check object is possible to carry out medical imaging shooting in multiple outpatient service, so
It may need to carry out multiple bearing piece scanning, this has undoubtedly aggravated the dose of radiation that check object is subject to.
The content of the invention
The application provides a kind of scan method and Medical Devices, to reduce dose of radiation that check object is subject to and quickening is swept
Retouch flow.
Specifically, the application is achieved by the following technical solution：
The one side of the application provides a kind of scan method.The scan method includes：The history of extraction check object is determined
Bit slice data；The history spacer data, which include performing check object positioning, scans obtained history spacer, to checking
Object performs the history distance between history scanning range and check object and the first references object when positioning scans；Current
Sweep phase, obtain the current distance between check object and the second references object；According to the check object and the first reference
The current distance and history scanning model between history distance, the check object and the second references object between object
Enclose, determine the Current Scan scope in Current Scan stage；According to the history spacer and the Current Scan scope to checking
Object is scanned.
Further aspect of the application provides a kind of Medical Devices.The Medical Devices include：Data extraction module, for carrying
The history of check object is taken to position sheet data；The history positioning sheet data comprises at least to be scanned to check object execution positioning
The history spacer that arrives, history scanning range and check object and the first references object when performing positioning scanning to check object
Between history distance；Distance-measuring device, between the Current Scan stage, acquisition check object and the second references object
Current distance；Scanning range determining module, for according between the check object and the first references object history distance,
Current distance and the history scanning range between the check object and the second references object, determine the Current Scan stage
Current Scan scope；Scanning means, for being carried out according to the history spacer and the Current Scan scope to check object
Scanning.
As can be seen from the above technical solutions, in the application, inspection pair is controlled by controlling the scanning range of CT equipment
The scanned position of elephant, make scanned position of the same check object in each scanning all identical, and scanned position is identical means
Same check object can use identical spacer in each scanning.So, even if same check object is scanning every time
In be different from relative to scanning bed position, the application can also realize spacer by controlling the scanning range of CT equipment
Reuse, so reduce the dose of radiation that check object is subject to and accelerate scanning process.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the coordinate system of medical imaging equipment；
Fig. 2 is a kind of structural representation for medical imaging equipment that the embodiment of the present application provides；
Fig. 3 is the method flow diagram that the embodiment of the present application provides；
Fig. 4 is showing for the horizontal range between a kind of head for check object that the embodiment of the present application provides and references object
It is intended to；
Fig. 5 is showing for the horizontal range between a kind of foot for check object that the embodiment of the present application provides and references object
It is intended to；
Fig. 6 is a kind of schematic diagram for determination Current Scan scope that the embodiment of the present application provides；
Fig. 7 is another schematic diagram for determining Current Scan scope that the embodiment of the present application provides；
Fig. 8 is the schematic diagram for another determination Current Scan scope that the embodiment of the present application provides；
Fig. 9 is the schematic diagram using spacer mark scan position that the embodiment of the present application provides；
Figure 10 is a kind of module frame chart for Medical Devices that the embodiment of the present application provides.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the application.
It is only merely for the purpose of description specific embodiment in term used in this application, and is not intended to be limiting the application.
" one kind " of singulative used in the application and appended claims, " described " and "the" are also intended to including majority
Form, unless context clearly shows that other implications.It is also understood that term "and/or" used herein refers to and wrapped
Containing the associated list items purpose of one or more, any or all may be combined.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the application
A little information should not necessarily be limited by these terms.These terms are only used for same type of information being distinguished from each other out.For example, do not departing from
In the case of the application scope, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on linguistic context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determining ".
Hereinafter, the part term in the application is explained first.
The scanning bed height of bed：Refer to the scanning bed height in vertical direction.The scanning bed height of bed of medical imaging equipment
It is adjustable, and can be with the current height of bed of real-time display on medical imaging equipment.
Scanning bed bed code：Refer to the scale along scanning bed length indication, be actual bed code.Can be according to from the head of a bed to bed
The mode that the deflection scale of tail gradually increases indicates bed code, also can gradually increase according to the deflection scale from tailstock to the head of a bed
Mode indicates bed code.For example, it is assumed that scanning bed length is 2 meters of (units：M), then scanning bed bed code from the head of a bed to bed
It can be marked as millimeter (unit according to millimeter interval：mm)-2000mm.External crucible can be worked as with real-time display on medical imaging equipment
Code.In one embodiment, for entering for bed scanning (the direction movement of the i.e. scanning bed frame towards close to Medical Devices), bed
Code can gradually increase, and vice versa for moving back for bed (i.e. scanning bed to be moved towards the direction away from frame), scanning bed code can gradually subtract
It is small, but not limited to this.Described scanning range, is represented by scanning bed bed code in the application.
Zero scanning bed code：The bed code of the original position of scanning can be arranged to zero, as zero code, other positions
Bed code relative bed code can be obtained relative to the adjustment of zero code.The actual bed code of the original position of scanning can be zero, also may be used
Not to be zero.For example, it is assumed that when carrying out certain single pass, the bed code of the original position of scanning is 100mm, the bed of end position
Code is 400mm, and sweep length is 300mm, and these numerical value may be displayed on the software interface of the master station of medical imaging equipment.
Can be using the bed code 100mm of original position as zero code, it is 0mm that external crucible code is deserved in setting, and other code-phases are for zero code
It is adjusted, the relative bed code of such end position is changed into 300mm.By setting zero code and relative bed code, beginning can be allowed
The original position of scanning is convenient to record from 0mm start recordings.
The coordinate system of medical imaging equipment：A kind of form of common coordinate system is shown in Figure 1, it is however generally that,
The original position and end position of scanning described in us refer to the position in Z-direction, it is scanning bed can enter along Z-direction bed or
Move back bed.
Check position：The body gesture that i.e. check object is lain on scanning bed.Conventional inspection position has：HFP(Head
First Prone, refer to head close to the front portion of Medical Devices and face down), HFS (Head First Supine,
Refer to head close to the front portion of Medical Devices and face upward), (Feet First Prone, refer to that foot leans on to FFP
The front portion of nearly Medical Devices and face is down), (Feet First Supine, refer to foot close to Medical Devices to FFS
Anterior and face is upward), (Head First Decubitus Right, refer to head before Medical Devices to HFDR
Portion, lie on one's side, right shoulder is under), (Head First Decubitus Left, refer to head before Medical Devices to HFDL
Portion, lie on one's side, left shoulder is under), (Feet First Decubitus Right, refer to foot before Medical Devices to FFDR
Portion, lie on one's side, right shoulder is under), (Feet First Decubitus Left, refer to foot before Medical Devices to FFDL
Portion, lie on one's side, left shoulder is under).It is above-mentioned only to list some typical inspection positions, but above-mentioned row are not limited in practical application
The inspection position of act.
Technical solution of the present invention is illustrated with reference to Figure of description and each embodiment.
At present, some medical imaging equipments are already provided with the function of reusing spacer, the main purpose of this function：
If same check object registers not homotactic scanning, then the check object only needs to perform one-time positioning scanning, rear
Acquired spacer can be reused in continuous scanning by above-mentioned function, the radiation that check object is subject to is reduced with this
Dosage simultaneously accelerates scanning process.
But in clinical practice, to may then meet following condition using above-mentioned function：
1) in follow up scan, the scanning bed height of bed and zero code are needed with performing the height of bed and zero code when positioning scans
It is consistent；
2) in follow up scan, check object checks that position needs to keep one with inspection position when performing positioning scanning
Cause；
3) in follow up scan, check object be in it is scanning bed on position need with perform positioning scanning when position protect
Hold consistent.
First point in above-mentioned condition and second point are easier to meet, but thirdly more difficult satisfaction, check object are relative
In scanning bed position difference is likely in each scanning.This means the reuse that existing medical imaging equipment carries
The function of spacer is almost destined to rescan spacer as illusory for the patient of further consultation check.
Therefore, present applicant proposes a kind of scan method of medical imaging equipment, this method is by controlling medical imaging to set
Standby scanning range realizes that the same scanned position of check object can be positioned in not homogeneous scanning process using identical
Piece.So, even if same check object is different from the scanning of not homogeneous relative to scanning bed position, the application can also
Repeatedly using for spacer is realized by controlling the scanning range of Medical Devices.
On the medical imaging equipment that the method that the application provides can apply to possess spacer scan function, such as CT is set
It is standby.It is easy for description, this method is described by taking CT equipment as an example below.
The CT equipment first provided as follows the application is described：
The CT equipment that the application provides adds distance-measuring device on the basis of existing CT equipment, range measurement dress
Put and may be mounted on the existing component of CT equipment, for example, may be mounted at CT equipment it is scanning bed on；Or the range measurement
Device can also be a single component, such as can be arranged in the form of support on a fixed position.
It is a kind of possible CT equipment structure referring to Fig. 2, wherein, distance-measuring device 21 is illustrate only in Fig. 2, and
Scanning bed 22, the part such as frame 23, master station 24, remaining part are not shown one by one.In Fig. 2, distance-measuring device 21 is arranged on
Scanning bed 22 head of a bed.
The distance-measuring device 21 that the application provides, it can be used for measuring the distance between check object and references object.
The references object can be distance-measuring device 21 itself or other fixing points, such as the scanning bed head of a bed；And
In different sweep phases, the references object of selection can be the same or different, and the application does not limit specifically.
The application is based on the distance between the check object and references object that are measured in the different scanning stage, to control
Scanning range of the CT equipment in the different scanning stage.As for specifically how based on the distance between check object and references object come
The scanning range of control CT equipment will be described below, and wouldn't repeat.
Distance-measuring device 21 can be included in contact type distance measuring apparatus and contactless distance-measuring device extremely
Few one kind.Contact type distance measuring apparatus includes slide calliper rule, and contactless distance-measuring device includes ultrasonic detector and/or red
Outer line detector.
The application is not intended to limit the placement location of distance-measuring device 21, and it can be located at the Z of the coordinate system of CT equipment
On axle (i.e. horizontal direction), such as placement location as shown in Figure 2；Or can also be in the Z axis of the coordinate system of CT equipment
Certain angle.
Scanning bed 22 be complete scan task delivery check object instrument, the requirement or operator that it can be by program
The disengaging frame 23 such as operation scanning cavity, complete the scan position of localization examination object.In one embodiment, frame 23
It is upper that X ray bulb, filter line device, collimater, reference detector, detector and various electronic circuits are housed.When check object is in
On scanning bed, during by the scanning cavity of frame 23, the X ray of the X ray bulb transmitting in frame 23 will pass through check object,
To obtain the X ray after check object decays, and then obtain checking to as scanner section by the image processing system of rear end
The image of position.
In the application, master station 24 can be used for controlling complete machine on/off, input service instruction, store scan data,
And/or require, to various technical finesses of image progress etc., to can be also used for record and perform determining for positioning scanning acquisition according to diagnosis
History distance between check object and references object that bit slice, instantaneous distance measurement apparatus 21 measure.In one embodiment,
The height of bed, zero code, the mark for checking position and check object of check object when the also recordable positioning of master station 24 scans
(ID).Above-mentioned data can be stored in the database of master station together.And subsequently when receiving spacer reuse instruction, will
At least partly above-mentioned data extract from database, transfer to the computer system of CT equipment to calculate working as Current Scan stage
Preceding scanning range.
The Current Scan scope in Current Scan stage how is calculated as CT equipment, to reach the mesh for reusing spacer
, it will be illustrated below by the method flow shown in Fig. 3, this method can apply to being filled with range measurement for the application offer
In the CT equipment put.This method as shown in Figure 3 can include step 301- steps 304.
It is first illustrative to the application scenarios of this method below before each step of this method is introduced.
For example when certain check object (such as patient) performs CT positioning scannings first, CT equipment can be by the positioning of acquisition
Piece, together with the distance between check object and the first references object measured at that time, the scanning bed height of bed, scanning bed zero
The ID of code, the inspection position of check object and check object is deposited into the database of CT master stations together.It is same behind some days
Check object because further consultation check need to rescan when, if operator is determined using the last positioning obtained of the check object
Piece, then it can trigger spacer to CT equipment and reuse instruction.CT equipment after receiving the indication, performs side shown in Fig. 3
Method, next, each step included to this method is introduced.
Step 301：Extract the history positioning sheet data of check object；The history spacer data are included to check object
The history spacer that positioning scanning obtains is performed, history scanning range and check object during positioning scanning are performed to check object
History distance between the first references object.
Specifically, CT equipment can reuse the ID of the check object carried in instruction according to the spacer received, from
History positioning sheet data corresponding with the ID is extracted in the database of CT master stations.
Step 302：In the Current Scan stage, the current distance between check object and the second references object is obtained.
As it was previously stated, if the distance-measuring device of CT equipment includes contact type distance measuring apparatus, can pass through here
Contact mode measures the current distance between check object and the second references object.If the distance-measuring device of CT equipment includes
Contactless distance-measuring device, then it can be measured here by contactless mode between check object and the second references object
Current distance.
Wherein, on the Z axis (i.e. horizontal direction) for the coordinate system that references object can be located at CT equipment, can also be set with CT
The Z axis of standby coordinate system is at an angle.In one embodiment, references object can be allowed to be located at the coordinate system of CT equipment
Z axis on, history that such distance-measuring device measures distance as between check object and the first references object it is horizontal away from
From the current distance measured is the horizontal range between check object and the second references object, so can conveniently calculate and work as
The Current Scan scope of preceding sweep phase.
Here the second references object can be with identical with the first above-mentioned references object, can also be different.In an implementation
In example, identical references object can be chosen in different sweep phase, even preceding sweep phase the first references object with
Second references object in Current Scan stage is identical.
In one embodiment, by check position be HFS exemplified by, if distance-measuring device is arranged on scanning bed head of a bed side
To, and chosen distance measurement apparatus is references object, then can by measure check object head and distance-measuring device it
Between horizontal range obtain the distance between check object and references object, as shown in Figure 4.
In another embodiment, still by check position be HFS exemplified by, if distance-measuring device is arranged on scanning bed bed
Tail direction, and chosen distance measurement apparatus is references object, then can be filled by measuring the foot of check object with range measurement
Horizontal range between putting obtains the distance between detection object and references object, as shown in Figure 5.It is above-mentioned only to list two
Example, but it is not limited to this.
Step 303：According to history distance, the check object and the between the check object and the first references object
Current distance and the history scanning range between two references object, determine the Current Scan scope in Current Scan stage.
In one embodiment, the first references object is identical with the second references object, can according to the history distance, it is described
Current distance and the history scanning range, determine the Current Scan scope in the Current Scan stage.In another embodiment,
First references object is different with the second references object, can scan model according to history distance, the current distance, the history
Enclose and the first object and second reference between relative level distance, to determine the Current Scan scope in Current Scan stage.
Under different scenes, determine that the detailed process of the Current Scan scope in Current Scan stage is as follows：
Scene one：First references object is identical with the second references object.
It is illustrative to the implementation process of step 303 in conjunction with Fig. 6.
The first step, it is determined that the historical level distance when performing CT positioning scannings between check object and the first references object
For L1, the present level distance between Current Scan stage check object and the second references object is L2.
If references object is located on the Z axis (i.e. horizontal direction) of the coordinate system of CT equipment, distance-measuring device is surveyed
Horizontal range of the history distance obtained as between check object and the first references object, the current distance measured is inspection pair
As the horizontal range between the second references object；If the Z axis of the coordinate system of references object and CT equipment is at an angle,
The measurement apparatus that then also needs to adjust the distance measures history distance and horizontal range does further calculating, for example can combine references object
With Z axis institute angle degree, the horizontal range between check object and the first references object, check object and the second reference pair are obtained
Horizontal range as between.
Second step, L2 is subtracted into L1, D=L2-L1 can be obtained.Wherein, D can be used for characterizing check object in twice sweep
In relative to scanning bed situation of change.
D value can be more than 0, can be equal to 0, might be less that 0.Work as D<When 0, represent in rear single pass (to work as
Preceding scanning) check object is closer to references object；Work as D>(i.e. CT positioning scanning) inspection pair when 0, is represented in preceding single pass
As closer to references object；As D=0, check object is the same relative to the position of references object in expression twice sweep.
3rd step, obtain D and then combine CT equipment perform CT positioning scanning when history scanning range [S1_min,
S1_max], you can obtain Current Scan scope [S2_min, S2_max] of the CT equipment in the Current Scan stage, wherein S2_min
=S1_min+D, S2_max=S1_max+D.For ease of understanding, Current Scan scope [S2_min, S2_max] can will be obtained
Process be interpreted as：Work as D<When 0, equivalent to by the history scanning range [S1_min, S1_max] toward the side where references object
To moving integrally | D | (absolute value for representing D) individual unit；Work as D>When 0, equivalent to by the history scanning range [S1_min, S1_
Max] moved integrally toward the direction away from references object | D | individual unit；As D=0, keep the history scanning range [S1_min,
S1_max] it is constant.
Scene two：First references object is different with the second references object, and the first references object and the second references object are located at
The same side of check object, and current distance is less than history apart from (i.e. the second references object is closer compared to the first references object
Check object).
It is illustrative to the implementation process of step 303 in conjunction with Fig. 7.
The first step, it is determined that the historical level distance when performing CT positioning scannings between check object and the first references object
For L1, the present level distance between Current Scan stage check object and the second references object is L2.
Second step, determine the relative level distance d between the first references object and the second references object.
3rd step, calculate D=L2-L1+d.Wherein, D can be used for characterizing check object in twice sweep relative to scanning
The situation of change of bed.
4th step, obtain D and then combine CT equipment perform CT positioning scanning when history scanning range [S1_min,
S1_max], you can obtain Current Scan scope [S2_min, S2_max] of the CT equipment in the Current Scan stage, wherein S2_min
=S1_min+D, S2_max=S1_max+D.
Scene three：First references object is different with the second references object, and the first references object and the second references object are located at
The same side of check object, and current distance is more than history apart from (i.e. the first references object is closer compared to the second references object
Check object).
It is illustrative to the implementation process of step 303 in conjunction with Fig. 8.
The first step, it is determined that the historical level distance when performing CT positioning scannings between check object and the first references object
For L1, the present level distance between Current Scan stage check object and the second references object is L2.
Second step, determine the relative level distance d between the first references object and the second references object.
3rd step, calculate D=L2-L1-d.Wherein, D can be used for characterizing check object in twice sweep relative to scanning
The situation of change of bed.
4th step, obtain D and then combine CT equipment perform CT positioning scanning when history scanning range [S1_min,
S1_max], you can obtain Current Scan scope [S2_min, S2_max] of the CT equipment in the Current Scan stage, wherein S2_min
=S1_min+D, S2_max=S1_max+D.
Scene four, the first references object and the second references object are different, and the first references object and the second references object position
In the not homonymy of check object.
The reasoning process of this scene and above-mentioned three kinds of scenes are similar but computationally increasingly complex, further need exist for knowing
Height of the extra parameter in road such as check object etc., and also distance-measuring device is disposed in the both sides of check object, it is practical
Value is little, therefore the application is not described further.
Step 304：Check object is scanned according to the history spacer and the Current Scan scope.
Further, the history positioning sheet data extracted in step 301 can also include check object and perform positioning scanning
When the scanning bed history height of bed, the history of scanning bed zero code of history and check object check position.
Based on this, in step 302, what CT equipment obtained can be check object in the case where the history checks position and second
Current distance between references object；And in step 304, CT equipment can be adjusted to the history height of bed scanning bed
When keeping the history to check position with described zero code of history and the check object, according to the history spacer and institute
Current Scan scope is stated to be scanned check object.
In clinical setting, CT equipment can operate after determining to check to the Current Scan scope as the current generation
History spacer and the posting for mark scan position are shown on interface, as shown in Figure 9.Operator can pass through mouse
Posting is dragged to the position for needing to scan, and adjusts the size of square frame, so as to complete the determination of scan position, is then triggered
Scanning instruction.CT equipment can further determine that out specific scan position according to the posting in the range of Current Scan, bag
Scanning starting position and scan end position are included, so as to be directly entered follow-up helical scanning or tomoscan.
In summary, the technical scheme that the application provides controls check object by controlling the scanning range of CT equipment
Same scanned position can use identical spacer in the scanning of not homogeneous.So, even if same check object is each
It is different from scanning relative to scanning bed position, it is fixed that the application can also be realized by controlling the scanning range of CT equipment
The reuse of bit slice, so reduce the dose of radiation that check object is subject to and accelerate scanning process.
Figure 10 show the module frame chart of one embodiment of CT equipment shown in Fig. 2 of the application offer.The equipment includes
Data extraction module 251, distance-measuring device 21, scanning range determining module 252 and scanning means 231.
Wherein, data extraction module 251, the history for extracting check object position sheet data；The history spacer
Data can include scanning check object execution positioning obtained history spacer, check object be performed when positioning scans
History distance between history scanning range and check object and the first references object.
Distance-measuring device 21, for working as between the Current Scan stage, acquisition check object and the second references object
Front distance.
Scanning range determining module 252, for according between the check object and the first references object history distance,
Current distance and the history scanning range between the check object and the second references object, determine the Current Scan stage
Current Scan scope.
Scanning means 231, in frame 23, for according to the history spacer and the Current Scan scope to inspection
Check as being scanned.
In one embodiment, first references object and second references object can be with identical.
Based on this, the scanning means 231, it is specifically used for：By the check object and the second references object it is current away from
From with a distance from the history for subtracting the check object and the first references object, difference is obtained；Swept according to the difference and the history
Scope is retouched, obtains the Current Scan scope in Current Scan stage, wherein, the minimum value of the Current Scan scope is the difference
With the minimum value sum of the history scanning range, the maximum of the Current Scan scope is swept for the difference with the history
Retouch the maximum sum of scope
In another embodiment, first references object is different with second references object, first reference
Object and second references object are located at the same side of the check object, and the current distance be less than the history away from
From.
Based on this, the scanning means 231, it is specifically used for：Determine first references object and second reference pair
Relative distance as between；The current distance of the check object and the second references object is subtracted into the check object and second
The history distance of references object, obtains difference, and calculates the difference and first references object and second reference pair
Relative distance and value as between；According to described and value and the history scanning range, the current of Current Scan stage is obtained
Scanning range, wherein, the minimum value of the Current Scan scope for the described and minimum value of value and the history scanning range it
Maximum with, the Current Scan scope is described and value and the history scanning range maximum sum.
In yet another embodiment, first references object is different with second references object, first reference
Object and second references object are located at the same side of the check object, and the current distance be more than the history away from
From.
Based on this, the scanning means 231, it is specifically used for：Determine first references object and second reference pair
Relative distance as between；The current distance of the check object and the second references object is subtracted into the check object and first
The history distance of references object, the first difference is obtained, and first difference is subtracted into first references object and described
Relative distance between two references object, obtain the second difference；According to second difference and the history scanning range, obtain
The Current Scan scope in Current Scan stage, wherein, the minimum value of the Current Scan scope for second difference with it is described
The minimum value sum of history scanning range, the maximum of the Current Scan scope are that second difference scans with the history
The maximum sum of scope.
In one embodiment, can also include to inspection in the history positioning sheet data that data extraction module 251 is extracted
Check as the history inspection of scanning bed history height of bed when execution positioning scans, scanning bed zero code of history and check object
Position.Accordingly, the distance-measuring device 21, can be used for examining in the history in Current Scan stage acquisition check object
The current distance had a medical check-up under position between the second references object；And the scanning means 231, it can be specifically used for when described
Scanning bed 22 are adjusted to zero code of the history height of bed and the history, and the check object keeps the history to check body
During position, check object is scanned according to the history spacer and the Current Scan scope.
In the present embodiment, CT equipment can also include memory 25, processor 26, display unit 27 and input unit 28.
Memory 25, for depositing the programmed instruction of the operation of data extraction module 251, scanning range determining module 252 is transported
Capable programmed instruction.And memory 25 can be also used for storing the history positioning sheet data of check object.Memory 25 can be with
It is magnetic storage medium or optical storage media, for example, hard disk, storage chip etc., but not limited to this.
Processor 26, for performing the programmed instruction of the operation of data extraction module 251, scanning range determining module 252 is transported
Capable programmed instruction.Wherein, processor 26 performs programmed instruction, the scanning range determining module that data extraction module 251 is run
The operation that as above data extraction module 251 performs respectively of the programmed instruction of 252 operations, scanning range determining module 252 perform
Operation.
Display device 27, for showing history spacer and posting for mark scan position.Display device 27
It may include liquid crystal display apparatus, cathode-ray display, plasma display etc..
Input unit 28 is used for receiving the input from operator, it may include keyboard, mouse and/or other users input dress
Put.For example, posting can be dragged to the position for needing to scan by operator by mouse, and the size of square frame is adjusted, so as to
The determination of scan position is completed, then driver sweep indicates.
The preferred embodiment of the application is the foregoing is only, not limiting the application, all essences in the application
God any modification, equivalent substitution and improvements done etc., should be included within the scope of the application protection with principle.
Claims (10)
- A kind of 1. scan method, it is characterised in that including：Extract the history positioning sheet data of check object；The history positioning sheet data comprises at least performs positioning to check object Scan obtained history spacer, the history scanning range and check object and the first ginseng positioned when scanning is performed to check object Examine the history distance between object；In the Current Scan stage, the current distance between check object and the second references object is obtained；According to the history distance between the check object and the first references object, the check object and the second references object it Between current distance and the history scanning range, determine the Current Scan scope in Current Scan stage；Check object is scanned according to the history spacer and the Current Scan scope.
- 2. the method as described in claim 1, it is characterised in that when first references object and the second references object phase Together, it is described according to history distance, the current distance and the history scanning range, determine the current of Current Scan stage Scanning range, including：Historical level distance between the check object and first references object is determined according to history distance, and Present level distance between the check object and second references object is determined according to the current distance；The present level distance is subtracted into the historical level distance, obtains difference；According to the difference and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, it is described to work as The minimum value of preceding scanning range is the minimum value sum of the difference and the history scanning range, the Current Scan scope Maximum is the maximum sum of the difference and the history scanning range.
- 3. the method as described in claim 1, it is characterised in that when first references object and second references object not Together, first references object and second references object are located at the same side of the check object, and the current distance Less than the history distance；It is described according to history distance, the current distance and the history scanning range, it is determined that currently The Current Scan scope of sweep phase, including：Historical level distance between the check object and first references object is determined according to history distance, and Present level distance between the check object and second references object is determined according to the current distance；Determine the relative level distance between first references object and second references object；The present level distance is subtracted into the historical level distance, obtains difference, and calculate the difference with it is described relative Horizontal range and value；According to described and value and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, it is described to work as The minimum value of preceding scanning range is described and value and the history scanning range minimum value sum, the Current Scan scope Maximum is described and value and the history scanning range maximum sum.
- 4. the method as described in claim 1, it is characterised in that when first references object and second references object not Together, first references object and second references object are located at the same side of the check object, and the current distance More than the history distance；It is described according to history distance, the current distance and the history scanning range, it is determined that currently The Current Scan scope of sweep phase, including：Historical level distance between the check object and first references object is determined according to history distance, and Present level distance between the check object and second references object is determined according to the current distance；Determine the relative level distance between first references object and second references object；The present level distance is subtracted into the historical level distance, obtains the first difference, and first interpolation is subtracted The relative distance, obtain the second difference；According to second difference and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, institute The minimum value for stating Current Scan scope is the minimum value sum of second difference and the history scanning range, described currently to sweep The maximum for retouching scope is the maximum sum of second difference and the history scanning range.
- 5. the method as described in claim 1, it is characterised in that the history positioning sheet data also includes performing check object The history of the scanning bed history height of bed, scanning bed zero code of history and check object during positioning scanning checks position；It is described In the Current Scan stage, the current distance between check object and the second references object is obtained, including：In the Current Scan stage, obtain check object in the case where the history checks position between the second references object it is current away from From；It is described that check object is scanned according to the history spacer and the Current Scan scope, including：When it is described it is scanning bed be adjusted to zero code of the history height of bed and the history, and the check object keep described in go through When history checks position, check object is scanned according at least to the history spacer and the Current Scan scope.
- A kind of 6. Medical Devices, it is characterised in that including：Data extraction module, the history for extracting check object position sheet data；The history positioning sheet data comprises at least Positioning is performed to check object to scan obtained history spacer, perform history scanning range when positioning scanning to check object History distance between check object and the first references object；Distance-measuring device, for the current distance between the Current Scan stage, acquisition check object and the second references object；Scanning range determining module, for according to the history distance between the check object and the first references object, the inspection Check as the current distance between the second references object and the history scanning range, determine that the current of Current Scan stage is swept Retouch scope；Scanning means, for being scanned according to the history spacer and the Current Scan scope to check object.
- 7. Medical Devices as claimed in claim 6, it is characterised in that when first references object and second reference pair As identical；The scanning means is specifically used for：The current distance is subtracted into the history distance, obtains difference；According to the difference and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, it is described to work as The minimum value of preceding scanning range is the minimum value sum of the difference and the history scanning range, the Current Scan scope Maximum is the maximum sum of the difference and the history scanning range.
- 8. Medical Devices as claimed in claim 6, it is characterised in that when first references object and second reference pair As difference, first references object and second references object are located at the same side of the check object, and described current Distance is less than the history distance；The scanning means is specifically used for：Determine the relative distance between first references object and second references object；The current distance is subtracted into the history distance, obtains difference, and calculate the difference and the relative distance and Value；According to described and value and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, it is described to work as The minimum value of preceding scanning range is described and is worth and the minimum value sum of the history scanning range, the Current Scan scope Maximum is described and value and the history scanning range maximum sum.
- 9. Medical Devices as claimed in claim 6, it is characterised in that when first references object and second reference pair As difference, first references object and second references object are located at the same side of the check object, and described current Distance is more than the history distance；The scanning means is specifically used for：Determine the relative distance between first references object and second references object；The current distance is subtracted into the history distance, obtains the first difference, and first interpolation is subtracted described relative Distance, obtain the second difference；According to second difference and the history scanning range, the Current Scan scope in Current Scan stage is obtained, wherein, institute State the minimum value of Current Scan scope for the minimum value sum of second difference and the history scanning range, described currently sweep The maximum for retouching scope is the maximum sum of second difference and the history scanning range.
- 10. Medical Devices as claimed in claim 6, it is characterised in that the history positioning sheet data is also included to inspection pair As the history of scanning bed history height of bed when performing positioning scanning, scanning bed zero code of history and check object checks body Position；The distance-measuring device, specifically for being checked in Current Scan stage, acquisition check object in the history under position With the current distance between the second references object；The scanning means, specifically for when it is described it is scanning bed be adjusted to zero code of the history height of bed and the history, and When the check object keeps the history inspection position, according at least to the history spacer and the Current Scan scope pair Check object is scanned.
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