CN205317919U - Magnetic resonance system's magnetic -field measurement positioner - Google Patents
Magnetic resonance system's magnetic -field measurement positioner Download PDFInfo
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- CN205317919U CN205317919U CN201521107449.4U CN201521107449U CN205317919U CN 205317919 U CN205317919 U CN 205317919U CN 201521107449 U CN201521107449 U CN 201521107449U CN 205317919 U CN205317919 U CN 205317919U
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Abstract
The utility model provides a magnetic resonance system's magnetic -field measurement positioner, the device can include angle location part and turning position part, wherein, the angle location part for probe unit pivoted angle position when instructing the magnetic -field measurement, the turning position part is used for probe unit rotates extremely during angle position that the angle location part was instructed, will probe unit fixes the angle position. It is fixed that pivoted angle value has been guaranteed to pop one's head in at every turn in this application, has improved measured data's accuracy.
Description
Technical field
The application relates to armarium technology, particularly to the magnetic-field measurement positioner of a kind of magnetic resonance system.
Background technology
Magnetic resonance system is the important tool of medical imaging technical field, it is provided that AT tissue internal information. Magnet is the vitals of magnetic resonance system, it is provided that for being magnetized into the main field as body constitution subgroup, and the uniformity of magnetic field of this main field is to affect magnetic resonance system to one of leading indicator of picture quality of imaging body imaging. Although magnet can make main field meet uniformity requirements in the design process as far as possible, but due to factors such as the workpiece machine errors in magnet manufacture process, magnet after assembling generally all can not reach uniformity requirements, it is thus desirable to magnet to be carried out the work for correction of uniformity of magnetic field, i.e. shimming. Shimming is used to correct uniformity of magnetic field so that the uniformity of magnetic field of magnet meets the work of index request, and gathering magnetic field global data (in magnetic field the magnetic field intensity of multiple sample points) is a step in shimming work, can according to the global data calculating magnetic field uniformity, and as shimming work foundation.
In correlation technique, gathering magnetic field global data can be performed by probe, will detect the field intensity of certain sample point in probe placement main field between two pole-faces of magnet. And the movement of each sample point in main field of popping one's head in, it is possible to manually being rotated by probe by shimming engineer, it is common that rotate fixing angle value (such as, 15 degree, 30 degree etc.), different angle values has corresponding sample point every time. But, this operation is the operating habit according to oneself due to shimming engineer and sight line rotates, there is action error or sense organ error unavoidably, the angle every time rotated that makes to pop one's head in is not necessarily identical, thus causing data acquisition inaccurate, also have impact on the accuracy of shimming result, reduce shimming effect.
Utility model content
In view of this, the application provides the magnetic-field measurement positioner of a kind of magnetic resonance system, to ensure that the angle value that probe rotates is fixed every time, improves the accuracy of measurement data.
Specifically, the application is achieved by the following technical solution:
First aspect, it is provided that the magnetic-field measurement positioner of a kind of magnetic resonance system, including:
Angular positioning member, is used for indicating the angle position of probe apparatus rotation during magnetic-field measurement;
Rotational positioning parts, for when described probe apparatus turns to the angle position that described angular positioning member indicates, being fixed on described angle position by described probe apparatus.
In one example, described angular positioning member, is arc location-plate.
In one example, the central angle that the radian of described arc location-plate is corresponding, equal to the rotational angle between adjacent two described angle positions.
In one example, described angular positioning member arranges multiple angle anchor point, the corresponding angle position of each angle anchor point, and rotational angle corresponding between the adjacent angle position of each two is equal.
In one example, described rotational positioning parts, are limit plugs.
In one example, described angular positioning member arranges hole, location or groove; Described limit plug is fixed in hole, described location or in groove.
In one example, when described limit plug coordinates with the hole, location on described angular positioning member, the length of described limit plug is more than the height in hole, described location.
In one example, described angular positioning member, is ring-type location-plate.
In one example, the material of described angular positioning member and rotational positioning parts is non-magnetic material.
In one example, described probe apparatus includes: carrier and extension apparatus, and when described probe apparatus is fixing in described angle position, one end of described extension apparatus connects described carrier, and the other end realizes fixing by magnetic-field measurement positioner.
The magnetic-field measurement positioner of the magnetic resonance system that the application provides, by being arranged to the angular positioning member of instruction angle position and for fixing the rotational positioning parts of probe apparatus, both parts matches and probe apparatus can be fixed on angle position accurately, the angle value every time rotated thus ensureing to pop one's head in is fixed, and improves the accuracy of measurement data.
Accompanying drawing explanation
Fig. 1 is a kind of the probability distribution of samples points schematic diagram shown in the application one exemplary embodiment;
Fig. 2 is that a kind of probe apparatus shown in the application one exemplary embodiment arranges schematic diagram;
Fig. 3 is a kind of arc location-plate schematic diagram shown in the application one exemplary embodiment;
Fig. 4 is a kind of limit plug shown in the application one exemplary embodiment and the signal of location-plate fixed form;
Fig. 5 is a kind of arc location-plate assembling application schematic diagram shown in the application one exemplary embodiment;
Fig. 6 is the another kind of arc location-plate schematic diagram shown in the application one exemplary embodiment;
Fig. 7 is a kind of ring-type location-plate schematic diagram shown in the application one exemplary embodiment;
Fig. 8 is the application schematic diagram of the magnetic-field measurement positioner shown in the application one exemplary embodiment.
Detailed description of the invention
Here in detail exemplary embodiment being illustrated, its example representation is in the accompanying drawings. When as explained below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represents same or analogous key element. Embodiment described in following exemplary embodiment does not represent all embodiments consistent with the application. On the contrary, they only with in appended claims describe in detail, the application some in the example of consistent apparatus and method.
As previously mentioned, shimming in magnetic resonance system, it is used to correct uniformity of magnetic field so that the uniformity of magnetic field of magnet meets the work of index request, and gathering magnetic field global data is a step in shimming work, it is possible to according to the global data calculating magnetic field uniformity. In the magnetic field carrying out shimming work, distribution has multiple sample point, and the collection of magnetic field global data includes the collection of the magnetic field intensity to each sample point in magnetic field. Following first in conjunction with Fig. 1 and Fig. 2, treat the distribution of the sample point in the magnetic field of shimming and the probe apparatus for detecting sample point field intensity is briefly described.
Between the upper pole face and lower pole face of magnet, distribution has many levels, and each aspect is distributed some sample points. For each aspect, the sample point in single aspect can be evenly distributed on the circumference of 360 degree, for instance, every 10 degree of sample points, or every 30 degree of sample points. Such as the example of Fig. 1, being spaced apart example with the angle of 30 degree, Fig. 1 illustrates wherein four sample points of a certain aspect. Probe can from start angle 0 degree, the some time is stopped for reading the field intensity of sample point 11 in this angle, then rotate 30 degree, stay on a period of time for measuring the field intensity of the sample point 12 on 30 degree, then the field intensity measuring the sample point 13 of 60 degree and the sample point 14 of 90 degree successively is rotated, until rotating 360 degree, complete the collection to all sample points in this aspect. Then, probe, after having gathered the sample point of this aspect, adjusts to another aspect, for instance, it is possible to being moved upwards up to an aspect or be moved down into next aspect, equally equiangularly interval rotates collecting sample point.
And generally when gathering, it is possible to probe is fixed on carrier, is acquired by the position by probe drives to each sample point above-mentioned that rotates of carrier. Fig. 2 illustrates for driving probe to gather the probe apparatus of each sample point, and this probe apparatus can include carrier and extension apparatus. As shown in Figure 2, carrier 21 is arranged between the upper pole face 23 of magnet 22 and lower pole face 24, and still for the sample point of Fig. 1, the position of this sample point can identify on carrier 21, can be such as the sample point position 25 shown in Fig. 2, it is possible to probe is fixed on this sample point position 25 place. When carrier 21 is arranged in position 15 corresponding for Fig. 10 degree, probe is also placed exactly in the position of sample point 11, it is possible to detect its field intensity; The position that rotation vector 21 (carrier may remain in vertically counterclockwise between upper pole face 12 and lower pole face 13 or turns clockwise) is 30 degree corresponding to Fig. 1, then probe also moves the position of the sample point 12 in corresponding diagram 1, by that analogy. Carrier 21 can identify the position of the sample point of every aspect respectively, when certain aspect of probe detection, probe is arranged on carrier 21 sample point position of corresponding aspect.
Position in order to ensure sample point is accurate, needing to ensure that carrier 21 can stop the some time for reading field intensity data at certain angle stabilization when rotating, now the magnetic-field measurement positioner provided by the application is realized the location to carrier 21 by extension apparatus. As in figure 2 it is shown, one end of extension apparatus 26 can be fixedly connected on carrier 21, the magnetic-field measurement positioner that the other end is provided by the application can be fixed on certain position, for instance, it is possible to will extend over device 26 and be fixed on grading ring.
Specifically, when carrier 21 turns to some angle position to measure, one end of device 26 can be will extend over fixed by magnetic-field measurement positioner, the sample point field intensity of this position of probe measurement of carrying on carrier 21, measure and magnetic-field measurement positioner fixing extension apparatus 26 after terminating, can be released so that carrier 21 and the probe of carrying, extension apparatus 26 are as a unitary rotation to next angle position measurement.
The magnetic-field measurement positioner that the embodiment of the present application provides, namely for being accurately positioned the rotational angle that carrier rotates every time, so that the angle that carrier rotates is fixed every time, avoid the angular error that shimming engineer relies on sight line to cause when judging with operating habit hand rotation carrier and extension apparatus (such as, it is 10 degree that error may result in once rotating, another rotation is 9 degree), it is ensured that the accuracy of magnetic-field measurement data.This magnetic-field measurement positioner can include two parts: angular positioning member and rotational positioning parts. Wherein,
Angular positioning member, for accurate identification carrier 21 position of all angles when rotating, such as, if sample point is to be spacedly distributed with 30 degree, so this angular positioning member can be identified for that out that 0 degree, 30 degree, 60 degree, 90 degree, 120 degree etc. until the position of all angles of 360 degree, and carrier 21 will turn to the position of each sample point when rotating according to this angular positioning member. If probe apparatus rotates according to the position of angular positioning member mark when rotating, it is possible to guarantee is every time fixing rotates 30 degree.
Rotational positioning parts, for carrier 21 and extension apparatus 26 being fixed on the position of all angles that above-mentioned angular positioning member identifies, wherein, these rotational positioning parts usually coordinate with extension apparatus 26 together with carrier 21 is fixed on certain turned position. Such as, when carrier 21 turns to the sample point position of 60 degree, the extension apparatus 26 being connected with carrier 21 is also with carrier 21 unitary rotation to this position, now can will extend over device 26 and be fixed on this angle position away from one end of carrier 21 by these rotational positioning parts so that carrier stops so that the probe detection sample point field intensity on carrier at this position stability.
The realizing structure and can have multiple of magnetic-field measurement positioner, several versions particularized below, but actual implement in be not limited to structures below and realize.
Embodiment one
In one feasible implementation, angular positioning member can be arc location-plate, and rotational positioning parts can be limit plug. Referring to the example of Fig. 3, in the present example, one piece of corresponding rotational angle of arc location-plate 31, such as, when the angle interval of sample point is 30 degree, the central angle a that the radian of arc location-plate 31 is corresponding is equal to 30 degree, then be equivalent to rotate one piece of arc location-plate namely equal to rotating 30 degree.
Example with further reference to Fig. 3, it is also possible to arrange hole 32, a location in the end of arc location-plate 31, limit plug 41 is inserted in this hole, location 32 and positions, specifically as shown in Figure 4. And the fit system of limit plug 41 and extension apparatus 26 can be, limit plug 41 is fixed in hole 32, location, and on limit plug 41, offer a draw-in groove for holding extension apparatus 26 end, when extension apparatus 26 and carrier 21 have rotated the position that the angle of an arc location-plate 31 arrives this hole, location 32, it is possible to will extend in the draw-in groove that limit plug 41 is put in the end of device 26.
In this example embodiment, it is used as the rotational angle of the arc location-plate self identification probe apparatus of angular positioning member, and, limit plug as rotational positioning parts can be consistent with arc location-plate quantity, coordinate one by one, every piece of arc location-plate all arranges a limit plug 41 in the position in the hole 32, location shown in Fig. 3, for securing elongated device 26. Referring to the example of Fig. 5, it is the arc location-plate of 30 degree for angle, it is possible on grading ring 51, assemble 12 arc location-plates 31, to ensure 360 degree of circular motion of probe apparatus; In other application scenarios, if the angle of arc location-plate is 60 degree, then whole grading ring 51 can assemble 6 arc location-plates 31. When making arc location-plate 31, it is possible to a series of location-plates of processing multiple angles use with alternative.
Embodiment two
In the implementation that another is feasible, angular positioning member or arc location-plate 31, rotational positioning parts are also or limit plug 41.Being different in that with embodiment one, all of arc location-plate 31 can share a limit plug 41, rather than every piece of arc location-plate 31 described in embodiment one all configures a limit plug 41.
In this example embodiment, limit plug 41 can be assembled together with extension apparatus 26 combination, limit plug 41 specifically can be assemblied in one end away from carrier 21 of extension apparatus 26, so when carrying out magnetic field global data and gathering, probe apparatus rotates the angle of an arc location-plate 31 every time, when arriving the position in hole 32, location, it is possible to will extend over the limit plug 41 of assembling on device 26 and insert in the hole, location 32 of arc location-plate 31, it is achieved the stationary positioned to extension apparatus 26.
Embodiment three
In the above embodiments one or embodiment two, it it is all the corresponding rotational angle of one piece of arc location-plate. This example and the first two embodiment are different in that, can identify the position of multiple rotational angle on each piece of arc location-plate 31.
Below for one of them arc location-plate 31, this arc location-plate 31 can arrange multiple angle anchor point, hole, location can be set, for instance the hole, location 32 shown in Fig. 6, the angle position that each corresponding probe apparatus in hole 32, location rotates in the position of this angle anchor point. As shown in Figure 6, illustrate rotary four angle positions of probe apparatus, including 61 to angle position, angle position 64, namely when carrier 21 turns to these angle positions, there is sample point on this angle position, the probe on carrier 21 can detect the field intensity of these sample points. In this example, it is assumed that the angle j between the adjacent angle position of each two is 20 degree, then the central angle that the overall radian of this arc location-plate is corresponding can be 60 degree.
Arc location-plate 31 in this example can have multiple application mode: such as, if the angle interval of sample point is 20 degree, just can, when extension apparatus 26 turns to the position in hole 32, a location every time, limit plug 41 be fixed in this hole, location 32, it is ensured that rotate 20 degree every time. Again such as, if the angle interval of sample point is 40 degree, it is possible to limit plug 41 is installed in hole 32, location, one, interval so that the angle between the limit plug 41 that each two installed is adjacent is 40 degree, and by the securing elongated device 26 of this limit plug 41.
Embodiment four
In embodiment before, angular positioning member is for arc location-plate 31, and in this example, angular positioning member can also is that ring-type location-plate 31 '. Such as, can assembling grading ring on the pole-face of magnet, grading ring 51 is ring-type, and the ring-type location-plate 31 ' in this example just can be fit directly on this grading ring 51.
Such as the ring-type location-plate 31 ' of Fig. 7 example, this ring-type location-plate 31 ' can adopt the mode in similar Fig. 6 hole, multiple location 32 is set, be inserted in securing elongated device 26 in hole 32, location for limit plug 41. Such as, if the angle interval of sample point is 30 degree, that just arranges limit plug 41 in 30 degree, 60 degree, the 90 degree holes, location that angularly position is corresponding, is positioned by limit plug 41 when extension apparatus 26 forwards this position to; If the angle interval of sample point is 45 degree, that just arranges limit plug 41 in 45 degree, 90 degree, the 135 degree holes, location 32 that angularly position is corresponding. Or, it is also possible to it is the end that limit plug 41 is pre-assembled in extension apparatus 26, when extension apparatus 26 turns to certain hole, location, limit plug 41 is inserted in the hole, location 32 of correspondence.Thus this ring-type location-plate 31 ' can also adapt to the demand of multiple rotational angle.
In addition, can also is that and polytype ring-type location-plate 31 ' such as two or three is set, each type of ring-type location-plate 31 ' arranges predetermined hole, several location 32, such as, a kind of multiple location hole on ring-type location-plate 31 ', between the hole, location that each two is adjacent, corresponding angle is 20 degree, and it is 20 degree, 40 degree, 60 degree equal angular measurement and positionings that this ring-type location-plate 31 ' may be used for sample point angle interval; Hole, multiple location on another kind of ring-type location-plate 31 ', between the hole, location that each two is adjacent, corresponding angle is 30 degree, and it is 30 degree, 60 degree, 90 degree equal angular measurement and positionings that this ring-type location-plate 31 ' may be used for sample point angle interval.
Above-mentioned several embodiments, list some and optionally realize structure, the structure of the magnetic-field measurement positioner of the application, it is possible to change flexibly, including:
Such as, the assembling mode of limit plug 41 and arc location-plate 31, can be that a groove (not shown) is set on arc location-plate 31, limit plug 41 is assembled in a groove, and the assembling mode of limit plug 41 and arc location-plate 31 can polytype, be not limited to the mode of hole 32, location or groove. In addition, extension apparatus 26 can with limit plug 41 combination assembling, can also be other modes, after the angle rotating an arc location-plate 31, such as will extend over the end of device 26 lean against the side of location-plate 31, or, arc location-plate 31 arranges two limit plugs 41, will extend over the end of device 26 and be placed between the two limit plug 41.
Again such as, rotational positioning parts and angular positioning member can be fixing assemblings, it is also possible to be movable assembling, such as, rotational positioning parts and angular positioning member can be connected together as an entirety always, or can also be two parts separately, are assembled together when deployed again. Limit plug 41 can also be cuboid, cylinder, triangle body or other can the shape of machine-shaping, and the length of limit plug 41 is more than the height in hole, location, so that the surface that can exceed location-plate 31 when inserting hole 32, location fixes extension apparatus 26. Additionally, rotational positioning parts can also be the parts of other forms outside limit plug.
In addition, the material of carrier 21, extension apparatus 26 and connection member thereof includes but not limited to that lucite, nylon etc. are without magnetic material, angular positioning member in positioner and the material of rotational positioning parts, also include but not limited to the non-magnetic materials such as lucite, nylon, epoxy laminate fabric swatch.
Following for arc location-plate 31 and limit plug 41, the application of the magnetic-field measurement positioner of the application is described.
Shimming engineer is when the magnetic-field measurement positioner using the application carries out data acquisition, can grading ring 51 be assembled on the pole-face of magnet, required rotational angle is measured (such as according to this, 30 degree, 15 degree etc.), select suitable arc location-plate 31 and limit plug 41 to install. As shown in Figure 8, in a feasible implementation, grading ring 51 can assemble multiple arc location-plate 31, for instance including these six location-plates of arc location-plate 31-1 to arc location-plate 31-6, the shape of each arc location-plate may refer to Fig. 6. Such as, when the rotational angle interval of probe apparatus is 20 degree, device 26 can be will extend over and be fixed on the limit plug 41 of arc location-plate 31 (can in conjunction with Fig. 2 Suo Shi), making the extension apparatus 26 position with the rotational angle all in 20 degree of popping one's head on mobile carrier 21 and carrier 21, probe carries out magnetic field data measurement in this position.
When gathering data, being fixed on by probe on carrier 21, the initial aspect of certain from magnetic field of carrier 21 starts to gather, and in this aspect, from start angle (such as 0 degree), the angle that then rotation progressively is fixed is until rotating 360 degree. When measuring the data of certain angle, rotation vector 21 and extension apparatus 26 thereof are to this angle, will extend over the part that device 26 intersects with grading ring 51 to be fixed by limit plug 41, it is ensured that carrier 21, extremely extension apparatus 26 of popping one's head in are static in correct angle, wait DATA REASONING. Then will extend over device 26 to lift, such as, when limit plug 41 and extension apparatus 26 combination assembling, it is possible to limit plug 41 is pulled up from the hole, location 32 of arc location-plate 31 so that extension apparatus 26 releasing is fixing with arc location-plate 31, carrier 21, probe and extension apparatus 26 are turned to next angle together, repeating said process, complete to all angle acquisitions of this aspect, mobile probe to next aspect continues to gather, until having gathered structure at all levels, one time global data gathers complete.
The magnetic-field measurement positioner of the application, it is possible not only to the collection magnetic field global data in the shimming stage use, it is possible to use to other data acquisition scenarios being suitable for, it is ensured that measure the accuracy of angle position, ensureing that the angle every time rotated is fixed value, artificial disturbance is eliminated. Compare the sense organ by shimming engineer to judge to rotate probe, the positioner in the application is adopted to can ensure that the accuracy of rotational angle, suppress the fluctuation of shimming engineer's operating habit, reduce the error in gatherer process, shimming technique more specification, further, workable, positioner carrying portable.
The foregoing is only the preferred embodiment of the application, not in order to limit the application, all within spirit herein and principle, any amendment of making, equivalent replacements, improvement etc., should be included within the scope that the application protects.
Claims (10)
1. the magnetic-field measurement positioner of a magnetic resonance system, it is characterised in that described magnetic-field measurement positioner includes:
Angular positioning member, is used for indicating the angle position of probe apparatus rotation during magnetic-field measurement;
Rotational positioning parts, for when described probe apparatus turns to the angle position that described angular positioning member indicates, being fixed on described angle position by described probe apparatus.
2. device according to claim 1, it is characterised in that described angular positioning member, is arc location-plate.
3. device according to claim 2, it is characterised in that the central angle that the radian of described arc location-plate is corresponding, equal to the rotational angle between adjacent two described angle positions.
4. rotational angle corresponding between the angle position that device according to claim 1, it is characterised in that arrange multiple angle anchor point on described angular positioning member, the corresponding described angle position of each angle anchor point, and each two are adjacent is equal.
5. device according to claim 1, it is characterised in that described rotational positioning parts, are limit plugs.
6. device according to claim 5, it is characterised in that hole, location or groove are set on described angular positioning member; Described limit plug is fixed in hole, described location or in groove.
7. device according to claim 6, it is characterised in that when described limit plug coordinates with the hole, location on described angular positioning member, the length of described limit plug is more than the height in hole, described location.
8. device according to claim 1, it is characterised in that described angular positioning member, is ring-type location-plate.
9. device according to claim 1, it is characterised in that the material of described angular positioning member and rotational positioning parts is non-magnetic material.
10. device according to claim 1, it is characterized in that, described probe apparatus includes: carrier and extension apparatus, when described probe apparatus is fixing in described angle position, one end of described extension apparatus connects described carrier, and the other end realizes fixing by magnetic-field measurement positioner.
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| CN201521107449.4U CN205317919U (en) | 2015-12-28 | 2015-12-28 | Magnetic resonance system's magnetic -field measurement positioner |
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| CN201521107449.4U CN205317919U (en) | 2015-12-28 | 2015-12-28 | Magnetic resonance system's magnetic -field measurement positioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082694A (en) * | 2019-04-29 | 2019-08-02 | 上海东软医疗科技有限公司 | Magnetic field measuring device, magnetic resonance equipment and Measurement Method for Magnetic Field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082694A (en) * | 2019-04-29 | 2019-08-02 | 上海东软医疗科技有限公司 | Magnetic field measuring device, magnetic resonance equipment and Measurement Method for Magnetic Field |
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Effective date of registration: 20170323 Address after: 200241 Shanghai, Minhang District purple Road, No. 119, room 117, room 1000 Patentee after: Shanghai Neusoft Medical Technology Co., Ltd. Address before: Hunnan New Century Road 110179 Shenyang city of Liaoning Province, No. 16 Patentee before: Dongruan Medical Systems Co., Ltd., Shenyang |