CN103932706B - MRI scan method and device - Google Patents
MRI scan method and device Download PDFInfo
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- CN103932706B CN103932706B CN201310021724.XA CN201310021724A CN103932706B CN 103932706 B CN103932706 B CN 103932706B CN 201310021724 A CN201310021724 A CN 201310021724A CN 103932706 B CN103932706 B CN 103932706B
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Abstract
The present invention provides a kind of MRI scan methods, include the following steps：Obtaining pendulum position, telltale mark has been set in the scanned vertical view of object on one's sick bed, the area-of-interest of the scanned object later；According to the vertical view and telltale mark, the telltale mark and magnet center distance a and distance b in the lateral direction in the longitudinal direction are calculated by known size and proportionate relationship；According to the distance a and distance b, the area-of-interest to being provided with the telltale mark is scanned.The scan method can complete the positioning to being scanned subject interests region during once-through operation, and there is no the risks of scanned object blinding.In optional technical solution, when scanned object needs to carry out multi-section bit scan, positioning need not be individually re-started, operating process is succinct.The present invention also provides a kind of MRI scan devices.
Description
【Technical field】
The present invention relates to magnetic resonance imaging arts more particularly to a kind of MRI scan method and devices.
【Background technology】
For magnetic resonance imaging system, the uniformity of magnetic field of magnet center is best, and imaging effect is best, therefore in magnetic resonance
When imaging scans, the position that patient's needs check can be moved on to magnet center by mobile magnetic resonance sick bed and examined again by operator
It looks into.Patient scan position, which is moved to magnet center usually, at present following two methods：
1, laser lamp cross method, as shown in Figure 1, operator opens cross laser lamp first outside magnet（1 in Fig. 1
For laser lamp）, need the region scanned to be moved to laser patient by " movement/stopping " operation of the shifting bed apparatus in equipment
Position indicated by lamp, system can remember the position that laser lamp is demarcated, and operator is by confirming that moving into device will swash in equipment
The position of light lamp scanning calibration is moved to the center of magnet.Detailed process is as follows：
1）It will be put to sick bed by scanned object, and put the scanning position interested with patient of the local coil needed for scanning
It sets;
2）Position Approximate under the forward/backward alignment laser lamp of sick bed is controlled by control panel;
3）Remind be scanned object eye closing prevent from burning, open laser lamp, continue through control panel control sick bed advance/
It retreats and is aligned the cross that laser lamp projects with scanning area interested;
4）It closes laser lamp simultaneously to trigger into bed, because laser lamp and magnetic field center, apart from constant, system can be issued and refer at this time
Order allows sick bed to move into equidistant, and scanning area interested is enabled to be placed in magnetic field center;
5）Positioning picture, this scan position are free of left/right directional information for the first time for operating software scanning;
6）First time scanning imagery is loaded onto software locating interface, motion scan slice（2 in Fig. 2 be scan slice）
It finds left/right corresponding position and carries out second of positioning as scanning in position;
7）According to positioning as carrying out formal clinical scanning.
2, edge of bed labelling method, as shown in figure 3, the left and right parallel lines by Fingers fixed bed along corresponding interested position cross
Point, by calculating the relative position of this point and magnetic field center, Mobile sickbed reaches magnetic field center.Detailed process is as follows：
1）Scanned object is put to sick bed, the scanning position interested with patient of the local coil needed for scanning is put
It sets;
2）Anchor point can be touched by clicking sick bed and interested position corresponding position with hand（3 in Fig. 3 be that can touch anchor point）;
3）Screen will show that click location information allows operator to confirm, system is by calculating this point and magnetic after clicking confirmation
Field centre distance, Mobile sickbed enable scanning area interested be placed in magnetic field center;
4）Positioning picture, this scan position are free of left/right directional information for the first time for operating software scanning;
5）First time scanning imagery is loaded onto software locating interface, motion scan slice（4 be scan slice in Fig. 4）'s
It finds left/right corresponding position and carries out second of positioning as scanning in position;
6）According to positioning as carrying out formal clinical scanning.
As described above, two kinds of localization methods in scanning process are required for by the way that area-of-interest is moved to magnet center
On axis in left and right directions, the positioning picture of positioning for the first time is then obtained by prescan, according to the positioning of first time positioning
It being positioned as carrying out second, i.e., axis in left and right directions moves up dynamic area-of-interest, makes it and be completely disposed at magnet center, it
Formal clinical scanning can be just proceeded by afterwards.Therefore, can not successfully be determined by the process of once-through operation in the prior art
Position area-of-interest, it is cumbersome that flow is compared in operation.
On the other hand, there are the wind of blinding to eyes for the laser lamp itself that laser lamp cross method uses in position fixing process
Danger, although edge of bed telltale mark method in operating process, needs human eye to judge area-of-interest without laser lamp blinding risk
Corresponding edge of bed contact position, therefore there is certain error in the longitudinal direction.
【Invention content】
It is cumbersome, certain to scanned object presence in order to solve positioning operation flow during above-mentioned MRI scan
Risk and the inaccurate problem of positioning, it is necessary to provide that a kind of operating process is succinct, risk is smaller and registration
MRI scan method and device.
A kind of MRI scan method, includes the following steps：
Obtaining pendulum position, the scanned vertical view of object on one's sick bed, the area-of-interest of the sweep object are set later
Set telltale mark；
According to the vertical view and telltale mark, the telltale mark is calculated by known size and proportionate relationship
With magnet center distance a and distance b in the lateral direction in the longitudinal direction；
According to the distance a and distance b, the area-of-interest to being provided with the telltale mark is scanned.
Optionally, it according to the vertical view and telltale mark, is calculated by known size and proportionate relationship described
It is also wrapped before the step of distance b of the telltale mark apart from magnet center distance a in the longitudinal direction and in the lateral direction
It includes：Image distortion correction is carried out to the vertical view.
Optionally, be provided with reference marker around the scanned object, the reference marker formed one with it is described
The parallel reference planes of sick bed, the projection covering perceptual interest region of reference planes, by the reference planes to image
Carry out distortion correction.
Optionally, the reference marker quantity is four, is located at described sick bed or so or front and rear sides two-by-two, is formed
One rectangle parallel with the sick bed or square reference planes.
Optionally, the quantity of the reference marker is four, is located at a left side for the sick bed frame of the sick bed periphery two-by-two
Right either front and rear sides form a rectangle parallel with the sick bed or square reference planes.
Optionally, according to the distance a and distance b, what the area-of-interest to being provided with telltale mark was scanned
Step is specially：According to the distance a and distance b, the telltale mark is moved to the magnet center, to being arranged
The area-of-interest for stating telltale mark is scanned.
Optionally, according to the distance a and distance b, the telltale mark is moved to the specific of the magnet center
Process is:
The telltale mark is moved on the axis of the magnet center left and right directions according to the distance a；
The scanned object is moved on the axis according to the distance b so that the telltale mark with it is described
Magnet center overlaps.
Optionally, according to the distance a and distance b, the telltale mark is moved to the specific of the magnet center
Process is:
The telltale mark is moved on magnet center axis in the front-back direction according to the distance b；
The scanned object is moved on the axis according to the distance a so that the telltale mark with it is described
Magnet center overlaps.
Optionally, according to the distance a and distance b, the area-of-interest to being provided with the telltale mark is swept
The step of retouching be specially：The axis being moved to the telltale mark according to the distance a where the magnet center left and right directions
On line, the specific location of area-of-interest is determined according to the distance b, the area-of-interest after determination is scanned.
Optionally, the known size and proportionate relationship are：The length L1 of sick bed, magnet center to the sick bed head of a bed
Distance and bed length of the telltale mark to head of a bed side place plane in the distance L2 of plane where side, the vertical view
Vertical plane in ratio X 1, the width W of sick bed, the vertical view where telltale mark to the sick bed front-rear direction axis
The ratio X 2 of distance and sick bed width, then a=L1*X1+L2, b=W*X2.
Optionally, the quantity of the telltale mark is N, scanning n-th（n≤N）When a position to be scanned, n-th is positioned
Label is moved to magnet center.
Optionally, work as N>When 1, n-th of telltale mark and n-th-are calculated by known size and proportionate relationship
1 telltale mark distance a in the longitudinal direction and distance b in the lateral direction.
To solve the above-mentioned problems, the present invention also provides a kind of MRI scan devices
A kind of MRI scan device, including：
Acquisition module, for obtaining the pendulum position scanned vertical view of object on one's sick bed later, the scanned object
Telltale mark has been set in area-of-interest；
Computing module, for according to the vertical view and telltale mark, being calculated by known size and proportionate relationship
Go out the telltale mark and magnet center distance a and distance b in the lateral direction in the longitudinal direction；
Scan module is used for according to the distance a and distance b, to being provided with the area-of-interest of the telltale mark
It is scanned.
Optionally, the positioning device further includes：
Correction module, for according to the vertical view and telltale mark, passing through known size and proportionate relationship meter
The step of calculating the distance b of the telltale mark apart from magnet center distance a in the longitudinal direction and in the lateral direction
Image distortion correction is carried out to the vertical view before.
Optionally, be provided with reference marker around the scanned object, the reference marker formed one with it is described
The parallel reference planes of sick bed, the projection covering perceptual interest region of the reference planes, the correction module are additionally operable to
Distortion correction is carried out to image by the reference planes.
The scan module is additionally operable to, according to the distance a and distance b, the telltale mark is moved to the magnetic
Body center, the perceptual interest region to being provided with the telltale mark are scanned.
Optionally, the scan module includes：
First movement unit：For the telltale mark to be moved to the magnet center right and left according to the distance a
To axis on；
Second mobile unit, for being moved on the axis sweep object according to the distance b so that described
Telltale mark is overlapped with magnet center.
Optionally, the scan module includes：
Third mobile unit, for the telltale mark to be moved to the magnet center front and back according to the distance b
To axis on；
4th mobile unit, for being moved on the axis sweep object according to the distance a so that described
Telltale mark is overlapped with magnet center.
Optionally, the scan module is additionally operable to that the telltale mark is moved in the magnet according to the distance a
On axis where heart left and right directions, the specific location of area-of-interest is determined according to the distance b, to interested after determination
Region is scanned.
Compared with prior art, MRI scan method provided by the invention and device can grasped once
The positioning to being scanned subject interests region is completed during making, and there is no the risks of scanned object blinding.Optional
Technical solution in, when scanned object needs to carry out multi-section bit scan, need not individually re-start positioning, operating process is simple
It is clean.
【Description of the drawings】
Fig. 1 is using laser lamp cross method to being scanned the positioning schematic diagram before object is scanned;
Fig. 2 is using laser lamp cross method to being scanned the schematic diagram being scanned after object positioning;
Fig. 3 is using edge of bed labelling method to being scanned the positioning schematic diagram before object is scanned;
Fig. 4 is using edge of bed labelling method to being scanned the schematic diagram being scanned after object positioning;
Fig. 5 is to be regarded using MRI scan method in the present invention to being scanned the oriented side before object is scanned
Figure；
Fig. 6 is to be overlooked using MRI scan method in the present invention being scanned the positioning before object is scanned
Figure；
Fig. 7 is the flow chart of MRI scan method in the embodiment of the present invention；
Fig. 8 is the flow chart of MRI scan method in another embodiment of the present invention；
Fig. 9 is the structural schematic diagram of MRI scan device in the present invention；
Figure 10 is the structural schematic diagram of scan module described in Fig. 9.
【Specific implementation mode】
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawings and examples
The specific implementation mode of the present invention is described in detail.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from embodiment described here using other, therefore the present invention is not limited by following public specific embodiment.
Just as described in the background art, during magnetic resonance imaging, it is scanned the positioning of object in the prior art
Method can not complete the positioning to being scanned subject interests region during once-through operation, and operating process is cumbersome, wherein swashing
To scanned object there is also certain risk, edge of bed positioning needs to judge position institute to be scanned by human eye light lamp cross method
Corresponding edge of bed contact position, there are certain deviations.Therefore to solve the above-mentioned problems, the present invention provides a kind of magnetic resonance
Image scanning method and device.
As shown in fig. 7, a kind of MRI scan method, includes the following steps：
Step S10, obtains the scanned vertical view of object on one's sick bed after pendulum position, the scanned object it is interested
Telltale mark has been set in region.
As shown in figure 5, putting the position stage in scanned object, telltale mark 5 is positioned over to the region of interest of scanned object
Domain, area-of-interest refer to position to be scanned（The affected part of scanned object）.Telltale mark is the solid that can visually identify, than
Such as plastic disc.
By the way that the camera 6 right over scanned object is arranged, gets scanned object and put bowing on one's sick bed
View.
Step S20 is calculated described according to the vertical view and telltale mark by known size and proportionate relationship
Telltale mark and magnet center distance a and distance b in the lateral direction in the longitudinal direction.
As shown in fig. 6, the distance a is telltale mark 5 in the longitudinal direction at a distance from magnet center 8, distance b is fixed
Position label 5 is in the lateral direction at a distance from magnet center 8.
The known size and proportionate relationship include the length L1 of sick bed, magnet center to the first side of the hospital bed
Telltale mark is to the distance of plane where head of a bed side and the ratio of bed length in the distance L2 of place plane, the vertical view
The distance of vertical plane in X1, the width W of sick bed, the vertical view where telltale mark to the sick bed front-rear direction axis
With the ratio X 2 of sick bed width, then a=L1*X1+L2, b=W*X2.The length and width of sick bed are known, by acquired vertical view,
Telltale mark can be obtained to the distance of plane where head of a bed side and the ratio X 1 of bed length, mark is positioned in the vertical view
Remember the distance of the vertical plane where the sick bed front-rear direction axis and the ratio X 2 of sick bed width.
Certainly, the known size and proportionate relationship, also other computational methods, for example may be used as described below
Image distortion correction reference marker calculates, as shown in fig. 6, the distance between reference marker 9a and 9b and magnet center are to ginseng
It is known at a distance from the plane perpendicular to sick bed where 9c to examine label 9a, and telltale mark 5 can be obtained by vertical view
It is above-mentioned to ratios of the reference marker 9a at a distance from the plane perpendicular to sick bed where 9c with the distance between 9a and 9b
Calculate the distance a；Reference marker 9a is known at a distance from 9c, telltale mark 5 can be obtained to institute by vertical view
Ratio of the distance of the vertical plane where sick bed front-rear direction axis at a distance from reference marker 9a and 9c is stated, it is above-mentioned to count
Calculate the distance b.
Step S30, according to the distance a and distance b, the area-of-interest to being provided with the telltale mark is swept
It retouches.
In one embodiment, according to the distance a and distance b, to be provided with the area-of-interest of telltale mark into
Row scanning the step of be specially：According to the distance a and distance b, the telltale mark is moved to the magnet center, it is right
The area-of-interest for being provided with the telltale mark is scanned.
Wherein, telltale mark magnet center is moved to be as follows：
The telltale mark is moved on the axis of the magnet center left and right directions according to the distance a, then again
Scanned object is moved on the axis according to the distance b, the telltale mark is made to be overlapped with magnet center.
Or the telltale mark is moved on magnet center axis in the front-back direction according to the distance b, so
Scanned object is moved further according to the distance a on the axis afterwards, the telltale mark is made to be overlapped with magnet center.
The Distribution of Magnetic Field uniformity of magnet center is best, it is above-mentioned area-of-interest is moved to magnet center and is scanned be
Most perfect condition, however limited by magnet aperture size in reality, sick bed in the lateral direction can not arbitrarily into
Row movement, and by a long axis of the centre of sphere of magnet center magnetic is disclosure satisfy that for the uniformity of magnetic field inside the spheroid of 50cm
The requirement of resonance image-forming, therefore sick bed is in the lateral direction without movement under normal circumstances, as long as area-of-interest is positioned at ellipse
Ball interior determines that the more specific location information of area-of-interest can be scanned later, and detailed process is as follows：According to it is described away from
The telltale mark is moved to from a on the axis where the magnet center left and right directions, determines that sense is emerging according to the distance b
The specific location in interesting region is scanned the area-of-interest after determination.
In another embodiment, as shown in figure 8, further including step S40 before step S20：The vertical view is carried out
Image distortion correction.
In order to obtain relatively large vertical view, setting on one's sick bed square camera generally with scanned object
Distance is relatively close, before the image got understands some deformations, therefore the calculating telltale mark is at a distance from magnet
Object vertical view is needed to carry out image distortion correction.Specifically, image can be carried out by the reference marker 9 in the vertical view
Metamorphopsic distortion corrects.The reference marker is at least three, forms a reference planes, in the present embodiment, it is preferred that as schemed
Shown in 6, using four reference markers, it is located at the left and right sides or front and rear sides of the sick bed, forms one and sick bed
Parallel rectangle or square reference planes, the projection of the reference planes cover position to be scanned.Certainly, reference marker
It can be arranged on the sick bed frame around the sick bed, during scanning, reference marker is not moved with sick bed, if behaviour
Author still wants to scan some position for starting that telltale mark is not set, and the reference planes that reference marker is formed can cover
The position scanned currently is needed, a telltale mark can be set again, obtain new vertical view, you can carries out aforesaid operations.
It should be noted that the position being arranged in reference marker not necessarily Fig. 6, as long as meeting the following conditions：
1, the reference planes that the reference marker is formed are parallel with the sick bed, and 2, the projections of the reference planes wants to cover and wait sweeping
Retouch position.
It during actual magnetic resonance imaging, often needs to be scanned multiple location, therefore can be at scanned pair
As putting the position stage, in different area-of-interests（The center at different positions to be scanned）Telltale mark is set simultaneously.Such as Fig. 6 institutes
Show, for example a shared N number of position needs to scan, then at least N number of telltale mark is arranged, when scanning to n-th（n≤N）It is a to be scanned
When position, n-th of telltale mark is moved to magnet center.When carrying out multi-section bit scan, first positioning can be calculated
Label and the distance b on a of distance in the longitudinal direction and left and right directions of magnet center, remaining is all to calculate to wait sweeping
Retouch telltale mark on position and a upper telltale mark for having scanned completion in the longitudinal direction at a distance from and left and right directions
On distance.
As shown in figure 9, a kind of MRI scan device, the scanning means include：
Acquisition module 10, the vertical view for obtaining scanned object, the area-of-interest of the scanned object by
Telltale mark is set.
Computing module 20, for according to the vertical view and telltale mark, passing through known size and proportionate relationship meter
Calculate the telltale mark and magnet center distance a and distance b in the lateral direction in the longitudinal direction.
Scan module 30 is used for according to the distance a and distance b, to being provided with the region of interest of the telltale mark
Domain is scanned.
The scanning means further includes：Correction module 40, for according to the vertical view and telltale mark, by
The size and proportionate relationship known calculate the telltale mark apart from magnet center distance a in the longitudinal direction and in left and right
Image distortion correction is carried out to the vertical view before the step of distance b on direction.It is arranged around the scanned object
There are reference marker, the reference marker to form a reference planes parallel with the sick bed, the projection of reference planes covers institute
Perceptual interest region is stated, the correction module 40 is additionally operable to carry out distortion correction to image by the reference planes.
The scan module 30 is additionally operable to, according to the distance a and distance b, the telltale mark is moved to described
Magnet center, the area-of-interest to being provided with the telltale mark are scanned.
As shown in Figure 10, the scan module 30 includes：
First movement unit 301：For the telltale mark to be moved to described magnet center or so according to the distance a
On the axis in direction.
Second mobile unit 302 makes for being moved the scanned object on the axis according to the distance b
The telltale mark is obtained to overlap with magnet center.
In another embodiment, the mobile module 30 includes：
Third mobile unit 303, for the telltale mark to be moved to before and after the magnet center according to the distance b
On the axis in direction；
4th mobile unit 304, for being moved on the axis sweep object according to the distance a so that
The telltale mark is overlapped with magnet center.
The scan module 30 is additionally operable to that the telltale mark is moved to the magnet center left side according to the distance a
On axis where right direction, the specific location of area-of-interest is determined according to the distance b, to the area-of-interest after determination
It is scanned.
In conclusion a kind of MRI scan method provided by the invention and device, by setting scanned
Telltale mark on subject interests region is positioned, and area-of-interest can be moved to magnet during once-through operation
Center simplifies and needs to carry out second of positioning again after obtaining the positioning picture of positioning for the first time by prescan in the prior art
Area-of-interest could be moved to the operating process of magnet center.In optional technical solution, multi-section bit scan is being carried out
When, positioned by the way that the different telltale marks on multiple positions to be scanned are arranged, avoid in the prior art each wait for
Scanned position is required for independent position fixing process, therefore magnetic resonance imaging localization method provided by the invention and device, operation stream
Journey is succinct, safer to scanned object, and setting accuracy is also preferable.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and it is perfect, therefore the present invention protection model
It encloses to work as and is subject to what claims were defined.
Claims (15)
1. a kind of MRI scan method, which is characterized in that include the following steps：
Obtaining pendulum position, the scanned vertical view of object on one's sick bed, the area-of-interest of the scanned object have been set later
Telltale mark；
Image distortion correction is carried out to the vertical view；
According to the vertical view and telltale mark, the telltale mark and magnetic are calculated by known size and proportionate relationship
Body center distance a in the longitudinal direction and distance b in the lateral direction；
According to the distance a and distance b, the area-of-interest to being provided with the telltale mark is scanned；
Carrying out image distortion correction to the vertical view includes：
Reference marker is provided with around the scanned object, the reference marker is exposed to the outside of the sick bed, described
Reference marker forms a reference planes parallel with the sick bed, and the projection of the reference planes covers the region of interest
Domain；Image distortion correction is carried out to the vertical view by the reference planes.
2. MRI scan method as described in claim 1, which is characterized in that the reference marker quantity is four,
It is located at described sick bed or so or front and rear sides two-by-two, forms the reference planes of a rectangle parallel with the sick bed.
3. MRI scan method as described in claim 1, which is characterized in that the quantity of the reference marker is four
It is a, it is located at sick bed frame of the sick bed periphery or so or front and rear sides two-by-two, formation one is parallel with the sick bed
The reference planes of rectangle.
4. MRI scan method as described in claim 1, which is characterized in that according to the distance a and distance b,
The step of area-of-interest to being provided with telltale mark is scanned be specially：According to the distance a and distance b, by institute
It states telltale mark and is moved to the magnet center, the area-of-interest to being provided with the telltale mark is scanned.
5. MRI scan method as claimed in claim 4, which is characterized in that according to the distance a and distance b,
The detailed process that the telltale mark is moved to the magnet center is:
The telltale mark is moved on the axis of the magnet center left and right directions according to the distance a；
The scanned object is moved on the axis according to the distance b so that the telltale mark and the magnet
Center overlaps.
6. MRI scan method as claimed in claim 4, which is characterized in that according to the distance a and distance b,
The detailed process that the telltale mark is moved to the magnet center is:
The telltale mark is moved on magnet center axis in the front-back direction according to the distance b；
The scanned object is moved on the axis according to the distance a so that the telltale mark and the magnet
Center overlaps.
7. MRI scan method as described in claim 1, which is characterized in that according to the distance a and distance b,
The step of area-of-interest to being provided with the telltale mark is scanned be specially：
The telltale mark is moved to according to the distance a on the axis where the magnet center left and right directions, according to institute
The specific location that distance b determines area-of-interest is stated, the area-of-interest after determination is scanned.
8. MRI scan method as described in claim 1, which is characterized in that the known size and proportionate relationship
For：Mark is positioned in the distance L2, the vertical view of plane where the length L1 of sick bed, magnet center to the first side of the hospital bed
Telltale mark in the distance of plane where remembering head of a bed side and the ratio X 1 of bed length, the width W of sick bed, the vertical view
To the ratio X 2 of the distance and sick bed width of the vertical plane where the sick bed front-rear direction axis, then a=L1*X1+L2, b
=W*X2.
9. MRI scan method as described in claim 1, which is characterized in that the quantity of the telltale mark is N, is swept
When retouching n-th of position to be scanned, n-th of telltale mark is moved to magnet center, wherein n≤N, N are positive integer.
10. MRI scan method as claimed in claim 9, which is characterized in that work as N>When 1, pass through known size
And proportionate relationship calculates n-th of telltale mark and (n-1)th telltale mark distance a and on a left side in the longitudinal direction
Distance b in right direction.
11. a kind of MRI scan device, which is characterized in that including：
Acquisition module, for obtaining the vertical view of the scanned object after putting position on one's sick bed, the sense of the scanned object
Telltale mark has been set in interest region；
Computing module, for according to the vertical view and telltale mark, institute to be calculated by known size and proportionate relationship
State telltale mark and magnet center distance a and distance b in the lateral direction in the longitudinal direction；
Scan module, for according to the distance a and distance b, the area-of-interest to being provided with the telltale mark to carry out
Scanning；
The scanning means further includes：
Correction module, for according to the vertical view and telltale mark, being calculated by known size and proportionate relationship
Before the step of distance b of the telltale mark apart from magnet center distance a in the longitudinal direction and in the lateral direction
Image distortion correction is carried out to the vertical view；
Reference marker is provided with around the scanned object, the reference marker is exposed to the outside of the sick bed, described
Reference marker forms a reference planes parallel with the sick bed, and the projection of the reference planes covers the region of interest
Domain, the correction module are additionally operable to carry out image distortion correction to the vertical view by the reference planes.
12. MRI scan device as claimed in claim 11, which is characterized in that the scan module is additionally operable to root
According to the distance a and distance b, the telltale mark is moved to the magnet center, to being provided with the telltale mark
Area-of-interest is scanned.
13. MRI scan device as claimed in claim 12, which is characterized in that the scan module further includes：
First movement unit：For the telltale mark to be moved to the magnet center left and right directions according to the distance a
On axis；
Second mobile unit, for being moved the scanned object on the axis according to the distance b so that described fixed
Position label is overlapped with magnet center.
14. the MRI scan device as described in power requires 12, which is characterized in that the scan module further includes：
Third mobile unit, it is in the front-back direction for the telltale mark to be moved to the magnet center according to the distance b
On axis；
4th mobile unit, for being moved the scanned object on the axis according to the distance a so that described fixed
Position label is overlapped with magnet center.
15. MRI scan device as claimed in claim 11, which is characterized in that the scan module is additionally operable to root
The telltale mark is moved to according to the distance a on the axis where the magnet center left and right directions, according to the distance b
The specific location for determining area-of-interest is scanned the area-of-interest after determination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021724.XA CN103932706B (en) | 2013-01-22 | 2013-01-22 | MRI scan method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310021724.XA CN103932706B (en) | 2013-01-22 | 2013-01-22 | MRI scan method and device |
Publications (2)
| Publication Number | Publication Date |
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| CN103932706A CN103932706A (en) | 2014-07-23 |
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| CN105551042B (en) * | 2015-12-15 | 2018-09-18 | 沈阳东软医疗系统有限公司 | A kind of scanning bed mark point method for determining position and device |
| CN108459286A (en) * | 2017-02-20 | 2018-08-28 | 冯原 | Internal Mechanical Properties of Soft Tissues test method based on magnetic resonance imaging and device |
| CN107510470A (en) * | 2017-09-30 | 2017-12-26 | 苏州众志医疗科技有限公司 | Positioner and localization method for medical imaging device |
| CN108852355A (en) * | 2018-06-29 | 2018-11-23 | 上海东软医疗科技有限公司 | Nuclear magnetic resonance equipment and patient's displacement method for nuclear magnetic resonance equipment |
| CN111528895A (en) * | 2020-05-26 | 2020-08-14 | 苏州波影医疗技术有限公司 | CT visual positioning system and positioning method |
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| US6460206B1 (en) * | 1999-10-01 | 2002-10-08 | Siemens Aktiengesellschaft | Medical diagnostic imaging apparatus |
| CN101502446A (en) * | 2008-02-07 | 2009-08-12 | 西门子公司 | Method and device to determine a position shift of a focal area |
| CN201384493Y (en) * | 2009-03-12 | 2010-01-20 | 西门子迈迪特(深圳)磁共振有限公司 | Positioning device used for magnetic resonance system |
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| DE19508715A1 (en) * | 1995-03-10 | 1996-09-12 | Siemens Ag | Positioning of patient in medical diagnostic appts. |
| DE102004015858A1 (en) * | 2004-03-31 | 2005-10-27 | Siemens Ag | Imaging medical examination device |
| DE102008064105A1 (en) * | 2008-12-19 | 2010-07-08 | Siemens Aktiengesellschaft | Device for determining the position of at least one local coil arranged or to be arranged on a patient couch of a magnetic resonance device, magnetic resonance system with such a device and associated method |
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| US6460206B1 (en) * | 1999-10-01 | 2002-10-08 | Siemens Aktiengesellschaft | Medical diagnostic imaging apparatus |
| CN101502446A (en) * | 2008-02-07 | 2009-08-12 | 西门子公司 | Method and device to determine a position shift of a focal area |
| CN201384493Y (en) * | 2009-03-12 | 2010-01-20 | 西门子迈迪特(深圳)磁共振有限公司 | Positioning device used for magnetic resonance system |
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