CN102961138B - MRI machine, the position determining radio-frequency coil and the method selecting radio-frequency coil - Google Patents
MRI machine, the position determining radio-frequency coil and the method selecting radio-frequency coil Download PDFInfo
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Abstract
The position the invention discloses MRI machine, determining radio-frequency coil and the method selecting radio-frequency coil. The method includes: provides the mapping table between traveling time and the displacement of movable carriage, and stores it in MR imaging apparatus; Coil label is arranged in the first pre-position on radio-frequency coil; Detector in order to detect coil label is arranged in the second pre-position in MRI machine, wherein, when described coil label along with the movement of movable carriage through detector, detector detects coil label; Record detects the time of coil label; Mapping table is searched to determine the distance corresponding with the described time according to this time; And the information according to determined distance and about the first and second precalculated positions determines the band of position of each coil subdivision of radio-frequency coil or composition radio-frequency coil.
Description
Technical field
Present invention relates in general to nuclear magnetic resonance (MRI, magneticresonanceimaging) field, relate more particularly to MRI machine, determine the position of radio-frequency coil and the method for selection radio-frequency coil.
Background technology
MR imaging apparatus utilizes magnetic resonance characteristics that the magnetic core (mainly proton) of organism shows in magnetic field to carry out the equipment of imaging. Along with the progress of superconductor technology, magnet technology, electronic technology, computer technology and material science, MRI machine obtains development at full speed. Owing to magnetic resonance phenomenon is harmless to live body, MRI machine is highly useful at medical domain, is usually used in the detailed inspection of whole body system. MRI machine has become one of most advanced, the most expensive modernization diagnostic device.
The Main physical parts of composition MRI machine include the magnet producing magnetic field and radio frequency (RF) coil etc. received for radio-frequency transmissions and signal. In current MRI machine, the number of coil or coil subdivision is increasing. Restriction due to uniform field and the imaging region of body coil, it is impossible to all of coil or coil subdivision are used together. Before scanning, doctor must first select to use which or which coil or coil subdivision.
In the prior art, usually, it is necessary to doctor relies on the memory to coil or the position of coil subdivision select the coil corresponding with position to be scanned or coil subdivision with its working experience and be entered in MRI system.
The flow process manually selecting coil or coil subdivision is complicated, and along with the increase of coil or coil subdivision number, occurs the probability of input error also to increase. It addition, it is also difficult for relying on the position remembeing each coil or coil subdivision.
Summary of the invention
Accordingly, it would be desirable to the position of a kind of coil that can automatically determine in MRI machine the method that automatically selects suitable coil.
For this, according to an aspect of the present invention, the method that the position of a kind of radio-frequency coil for automatically determining in MR imaging apparatus is provided, described MR imaging apparatus includes for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, and described method includes step:
Mapping table between traveling time and the displacement of described movable carriage is provided, and stores it in MR imaging apparatus;
Coil label is arranged in the first pre-position on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector in order to detect described coil label is arranged in the second pre-position in MR imaging apparatus, wherein, when described coil label along with movable carriage to the movement of magnet through described detector, described detector detects described coil label;
Record described detector and the time of described coil label detected;
Described mapping table is searched, the distance that during to determine the described coil label arrival described detector corresponding with the described time, described movable carriage moves through according to the described time recorded; And
The band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition is determined according to determined described distance and the information about the first and second precalculated positions.
According to one embodiment of present invention, determine according to determined described distance and the information about the first and second precalculated positions that the step of the band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition farther includes:
Described coil label position on described movable carriage is determined according to determined described distance and the information about the second precalculated position; And
According to described coil label position on described movable carriage and about the information in the first precalculated position, it is determined that each coil subdivision of radio-frequency coil described in described radio-frequency coil or the composition band of position on described movable carriage.
According to one embodiment of present invention, information about described first precalculated position indicates the described coil label distance apart from each edge of described radio-frequency coil or indicates described coil label apart from the distance at each edge of each coil subdivision, and wherein indicates described second precalculated position relative position in described MR imaging apparatus about the information in described second precalculated position.
According to one embodiment of present invention, determine that the step of described coil label position on described movable carriage includes according to determined described distance and the information about the second precalculated position: deduct, by the distance in described second precalculated position to the starting point of described sick bed support, the described distance determined according to described mapping table and obtain described coil label position on described movable carriage.
According to one embodiment of present invention, described second precalculated position relative position in described MR imaging apparatus is described second precalculated position distance to the starting point of described sick bed support.
According to one embodiment of present invention, described coil label is RFID tag, and described detector is radio-frequency readers.
According to one embodiment of present invention, described mapping table and the information about the first precalculated position and the information about the second precalculated position are stored in described RFID tag.
According to one embodiment of present invention, described mapping table and the information about the first precalculated position and the information about the second precalculated position are stored in the data base of described MR imaging apparatus, and described data base is positioned in the memory module of described MR imaging apparatus.
According to a further aspect in the invention, a kind of method that radio-frequency coil for automatically selecting in MR imaging apparatus is provided, described MR imaging apparatus includes for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, and described method includes step:
Mapping table between traveling time and the displacement of described movable carriage is provided, and stores it in MR imaging apparatus;
Coil label is arranged in the first pre-position on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector in order to detect described coil label is arranged in the second pre-position in MR imaging apparatus, wherein, when described coil label along with movable carriage to the movement of magnet through described detector, described detector detects described coil label;
Record described detector and the time of described coil label detected;
Described mapping table is searched, the distance that during to determine the described coil label arrival described detector corresponding with the described time, described movable carriage moves through according to the described time recorded;
The band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition is determined according to determined described distance and the information about the first and second precalculated positions; And
Treat the selection at scanning position in response to operator, according to described radio-frequency coil or composition, the band of position of each coil subdivision of radio-frequency coil automatically selects the coil subdivision of radio-frequency coil or the radio-frequency coil being suitable to described position to be scanned.
According to another aspect of the invention, a kind of MR imaging apparatus is provided, it includes for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, and wherein said MR imaging apparatus also includes:
Memory module, in described memory module, storage has the mapping table between traveling time and the displacement of described movable carriage;
The coil label of the first pre-position being arranged on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector of the second pre-position being arranged in MR imaging apparatus, in order to detect described coil label, wherein, when described coil label is along with movable carriage is to the movement of magnet to through described detector, described detector detects described coil label;
Control device, it is configured to record described detector and the time of described coil label detected, and search described mapping table according to the described time recorded, to obtain the distance that when the described coil label corresponding with the described time arrives described detector, described movable carriage moves through; And
Calculation element, its information being configured to according to determined described distance and about the first and second precalculated positions calculates the band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition.
According to one embodiment of present invention, described control device is additionally configured to treat the selection at scanning position in response to operator, and according to described radio-frequency coil or composition, the band of position of each coil subdivision of radio-frequency coil automatically selects the coil subdivision of radio-frequency coil or the radio-frequency coil being suitable to described position to be scanned.
According to one embodiment of present invention, described calculation element farther includes:
Marker location computing unit, it is configured to determine described coil label position on described movable carriage according to determined described distance and the information about the second precalculated position; And
Band of position computing unit, it is configured to according to described coil label position on described movable carriage and about the information in the first precalculated position, it is determined that each coil subdivision of radio-frequency coil described in described radio-frequency coil or the composition band of position on described movable carriage.
According to one embodiment of present invention, information about described first precalculated position indicates the described coil label distance apart from each edge of described radio-frequency coil or indicates described coil label apart from the distance at each edge of each coil subdivision, and wherein indicates described second precalculated position relative position in described MR imaging apparatus about the information in described second precalculated position.
According to one embodiment of present invention, described marker location computing unit deducts, by the distance in described second precalculated position to the starting point of described sick bed support, the described distance determined according to described mapping table and obtains described coil label position on described movable carriage.
According to one embodiment of present invention, described second precalculated position relative position in described MR imaging apparatus is described second precalculated position distance to the starting point of described sick bed support.
According to one embodiment of present invention, described coil label is RFID tag, and described detector is radio-frequency readers.
According to one embodiment of present invention, described RFID tag stores the information about the first precalculated position and the information about the second precalculated position.
According to one embodiment of present invention, the information about the information in the first precalculated position with about the second precalculated position is stored in described memory module.
The method of the MRI machine according to the present invention, the position determining radio-frequency coil and selection radio-frequency coil makes it possible to automatically determine the position of each coil subdivision of radio-frequency coil or composition radio-frequency coil, and suitable radio-frequency coil or coil subdivision can be automatically selected in response to the appointment at position to be scanned, thus alleviate the burden of operator and avoid manual errors.
Accompanying drawing explanation
In order to be best understood from content of this disclosure, below with reference to the description below carried out in conjunction with accompanying drawing, in the accompanying drawings:
Fig. 1 is the composition schematic diagram of MRI machine according to an embodiment of the invention;
Fig. 2 is the schematic diagram of the sphere of action of the radio-frequency coil being placed in surroundings thereof according to an embodiment of the invention and each coil or coil ingredient;
Fig. 3 A-3B is the schematic diagram of the coil label according to an embodiment of the invention possible position on radio-frequency coil;
Fig. 4 is the schematic diagram of the detector according to an embodiment of the invention possible position on MRI machine;
Fig. 5 is the diagram of the band of position determining radio-frequency coil according to an embodiment of the invention; And
Fig. 6 is the schematic flow diagram automatically selecting suitable radio-frequency coil according to an embodiment of the invention.
Detailed description of the invention
Specific embodiments of the invention are described more fully below, but the present invention is not limited to following specific embodiment.
Fig. 1 illustrates the composition schematic diagram of MRI machine according to an embodiment of the invention. As it is shown in figure 1, MRI machine 100 includes for providing the magnet 101 in magnetic field, for moving will be located in the movable carriage 103 that patient 105 thereon moves in magnet 101 on sick bed support 102, and radio-frequency coil 104. Radio-frequency coil involved in the present invention is the radio-frequency coil 104 being in use placed in around patient 105. Fig. 2 illustrates the enlarged drawing of the sphere of action of radio-frequency coil 104 and each coil or the coil ingredient being placed in around patient 105. As in figure 2 it is shown, radio-frequency coil 104 is commonly included in the coiler part with patient and the coiler part under patient's body, in embedding movable carriage 103. Every coil sections can include multiple coil or multiple coil subdivision A, B, C, D, E, F, G, H.
Return Fig. 1, except above-mentioned building block, MRI machine 100 also includes coil label 106 (shown in the black bars in Fig. 1), this coil label 106 is arranged in the pre-position on radio-frequency coil 104, and namely the coil label 106 position on radio-frequency coil 104 is known. In actual applications, coil label 106 may be located at any commitment positions on radio-frequency coil 104. Fig. 3 A-3B illustrates the schematic diagram of the coil label according to an embodiment of the invention possible position on radio-frequency coil. Fig. 3 A illustrates the coil label (representing in the drawings) possible example location on single cylindrical coil with black bars. This label may be located at any position in the cylindrical sides of coil. After determining the precalculated position of label, label relative position on coil is known, for instance, label is known to the front surface of cylindrical coil and the distance of rear surface. So, if it is known that coil label position in MRI machine, then can easily acknowledge that the whole coil band of position (coverage) in MRI machine. Fig. 3 B illustrates the coil label (representing in the drawings) possible example location on the coil being made up of each coil subdivision with black bars, and it may be located at the optional position in anyon part. Equally, after determining the precalculated position of label, label relative position on coil is known, for instance, label is known to the distance at the edge of each coil subdivision. So, when coil label position in MRI machine is known, it is possible to easily acknowledge that each coil subdivision band of position in MRI machine. In FIG and in the following description, with be only provided with on the radio-frequency coil with patient coil label and automatically determine radio-frequency coil position situation exemplarily, it is to be understood that, radio-frequency coil under patient's body can also be provided with coil label, and determine that the process of its position is similar to the radio-frequency coil with patient.
As it is shown in figure 1, MRI machine 100 also includes the detector 107 (representing in the drawings) for detecting coil label 106 with black triangle. Detector 107 is arranged in the fixed position place of MRI machine. Although in FIG detector 107 being shown located on the sidewall of the porch of magnet 101, it should be understood, however, that, detector 107 may be located on other fixed position place in MRI machine 100, as long as it can detect coil label 106 easily. Fig. 4 illustrates the schematic diagram of the detector according to an embodiment of the invention (representing in the drawings) possible example location in MRI machine with black triangle. Detector may be located at any position (being not limited to the sidewall of porch) on magnet sidewall, or on the sick bed support that moves thereon of the movable carriage being positioned at MRI machine. Once secure detector 107, its relative position in MRI machine is exactly known. Such as, detector 107 arrives the distance d of sick bed support starting point1It is known. Here, it is illustrated for the starting point of sick bed support, it is to be understood that, it is also possible to using other known point in MRI machine as reference, for instance detector 107 is known to the distance at the midpoint of sick bed stent length.
According to one embodiment of present invention, coil label 106 is RF identification (RFID) label or chip, and detector 107 is radio-frequency readers. Alternatively, coil label 106 is bar coded sticker, and detector 107 is barcode reader. Should be appreciated that coil label 106 and detector 107 can be the combinations that can read marker and reader thereof of any identity that can determine radio-frequency coil.
Once arrange coil label 106 and detector 107, the just storage information about the coil label 106 position on radio-frequency coil 104 and the information about the detector 107 relative position in MRI machine in the memory module 108 (referring to Fig. 1) of MRI machine 100. Such as, the distance at each edge of the storage coil label 106 distance to each edge of radio-frequency coil or each coil subdivision to composition radio-frequency coil, and store the detector 107 distance to the starting point of sick bed support 102. Alternatively, when reading speed allows, it is also possible to these information are stored in coil label 106, read for detector 107.
It is described below in detail and how to automatically determine the position of radio-frequency coil according to the present invention and how to automatically select suitable radio-frequency coil.
The memory module 108 of MRI machine 100 is previously stored the mapping table between traveling time t and the displacement d of movable carriage 103. An example of this mapping table is illustrated below:
| Time | t0 | t1 | ...... | tn |
| Distance | 0 | d1 | ...... | dn |
In this example, t0, t1 ... tn are the multiple moment in movable bed 103 motor process, 0, d1 ... dn be the displacement corresponding respectively to these moment. Wherein, t0 represented for zero moment, and namely movable bed 103 starts the moment of movement. This mapping table is obtained by many experiments and interpolation technique. In one embodiment, measured by many experiments and interpolation technique, set up the mapping table that adjacent time inter is very short, for instance, two moment adjacent in mapping table are separated by only several milliseconds. Although the movement that movable carriage 103 is on the sick bed support 102 unmeasured accelerated motion that is acceleration, but for known traveling time ti, the displacement of correspondence namely it is appreciated that by searching this mapping table. In one embodiment of the invention, starting timing with the moment that movable carriage 103 starts movement from the starting point of sick bed support 102 for zero moment, the displacement corresponding with zero moment is zero. It is of course also possible to the moment before movement or other moment in moving process for zero moment.
Usually, this mapping table and be stored in the data base of this MRI machine about the information of coil label position on radio-frequency coil and the information about detector relative position in MRI machine, this data base may be located at MRI machine or it controls in the memory module of computer. In another embodiment, this mapping table can also be stored in coil label 106, and as it has been described above, the positional information about coil label and detector can also store in coil label 106.
When coil label 106 along with movable carriage to the movement of magnet through detector 107 time, detector 107 detects coil label 106. As it is shown in figure 1, MRI machine 100 has control device 109, its record detector 107 detects the moment t of coil label 106d, and search mapping table, to obtain the displacement d corresponding with this moment2, i.e. when coil label 106 arrives the position of detector 107, movable carriage 103 starts the distance moved through from the starting point of sick bed support 102. This distance d2Also it is the distance that moves through of coil label 106.
As shown in Figure 1, MRI machine 100 also includes calculation element 110, it is configured to according to searching the information of the determined distance of mapping table and the relevant detector 107 relative position in MRI machine 100 and about the information of the coil label 106 relative position on radio-frequency coil 104, calculates radio-frequency coil 104 or forms the band of position of each coil subdivision of radio-frequency coil 104. Calculation element 110 includes label computing unit 1101 and band of position computing unit 1102 further.
First, label computing unit 1101 searches the distance that obtains and the information about the detector 107 relative position in MRI machine 100 calculates the coil label 106 position in MRI machine according to controlling device 109. As it has been described above, the information about the detector 107 relative position in MRI machine 100 has been stored in memory module 108 or coil label 106, for instance known detector 107 is d to the distance of sick bed support starting point1. Schematic diagram according to Fig. 5 is it can be seen that coil label 106 is to distance (namely the distance of the first end overlapped to the starting point with sick bed support 102 of movable carriage 103 in the zero moment) d of the starting point of sick bed support 1023=d1-d2. Owing in moving process, radio-frequency coil 104, patient 105 move together with movable carriage 103, therefore, no matter where movable carriage 103 is in, and coil label 106 is all d to the distance of the first end of movable carriage 1033. Thus, label computing unit 1101 is d by the distance of detector 107 to sick bed support starting point1Deduct the coil label 106 distance d to detector 1072Obtaining the coil label 106 position in MRI machine, namely coil label 106 arrives the distance d of the first end of movable carriage 1033��
Then, band of position computing unit 1102, according to the coil label 106 position on movable carriage 103 and about the information of the coil label 106 relative position on radio-frequency coil 104, determines each coil subdivision of radio-frequency coil 104 or composition radio-frequency coil 104 band of position (coverage) on movable carriage 103. As it has been described above, the information about the coil label 106 relative position on radio-frequency coil 104 has been previously stored in memory module 108 or coil label 106. Such as, known coil label 106 is positioned in the cylindrical sides of single cylindrical coil, and be all l to the distance on former and later two surfaces, then band of position computing unit 1102 can calculate this radio-frequency coil 104 band of position on movable carriage 103 and is: the distance of the first end to movable carriage 103 is d3-l arrives d3The scope of+l. Similarly, if radio-frequency coil 104 is made up of multiple coil subdivisions, the then band of position computing unit 1102 distance according to the coil label 106 position on movable carriage 103 and label 106 to the edge of each coil subdivision, it is possible to calculate each coil subdivision band of position (coverage) on movable carriage 103.
The present invention is applicable not only to determine the position of single radio frequency coil, is apply equally as well to determine the position of multiple radio-frequency coil. In this case, each radio-frequency coil is provided respectively coil label, but these multiple coil labels can share a detector. Detector may identify which the identity of radio-frequency coil by reading the coil label of radio-frequency coil. Control device records detector respectively and the time of each coil label detected and search mapping table to obtain corresponding distance. Calculation element calculates the band of position according to each coil subdivision of the principle identical with above description and process respectively each radio-frequency coil or each coil of composition. Do not repeat them here.
After calculating the band of position of radio-frequency coil 104, the positional information of each coil or each coil subdivision is sent to memory module 108 for storage by calculation element 110.
Patient 105 being moved to after in magnet 101, operator is operated by MRI machine can obtain the pre-scan images of patient 105. Usually, controlling control computer or its ingredient that device 109 is MRI machine, described control computer generally also includes display. The shown position to be scanned selecting patient over the display for operator of this pre-scan images. Once operator have selected position to be scanned by such as towing mouse in pre-scan images, control device 109 and can automatically search and select the radio-frequency coil corresponding with the band of position at this position to be scanned or coil subdivision further to scan. Such as, if the distance that position to be scanned is the first end to movable carriage 103 is diTo dsRegional extent, this regional extent drops in the coverage of coil subdivision B, then control device 109 and can automatically select coil subdivision B through searching with comparison, be artificially analyzed, select and manually input institute's selection coil or coil subdivision without operator. Should be appreciated that selected radio-frequency coil is not limited to single radio frequency coil or single coil subdivision, it is also possible to be multiple radio-frequency coil or the combination of multiple coil subdivision.
In an alternate embodiment, calculation element 110 is also the ingredient controlling computer.
Fig. 6 illustrates the position for automatically determining radio-frequency coil according to an embodiment of the invention and automatically selects the flow chart of method of suitable coil. The method is implemented in MRI machine as above. In the present embodiment, the position of the radio-frequency coil with patient to be determined and select suitable coil. First, timing (step 601) is started when movable carriage starts mobile from the starting point of sick bed support. The time (step 602) detected is recorded when the coil label on radio-frequency coil is detected by the detector. Then, MRI machine automatically searches the mapping table between the traveling time of movable carriage and displacement, to obtain the distance (step 603) corresponding with the time recorded. Afterwards, as described above, the MRI machine information according to described distance and about coil label and the position of detector automatically calculates the band of position of radio-frequency coil or the band of position (step 604) of each coil subdivision of composition radio-frequency coil. After operator have selected position to be scanned in pre-scan images, MRI machine automatically selects the radio-frequency coil being suitable to this position to be scanned or coil subdivision (step 605) according to the computed band of position.
According to embodiments of the invention, it is possible to automatically determine radio-frequency coil or the band of position of its each ingredient, and automatically select the suitable radio frequency coil or its subdivision that are suitable to position to be scanned. And, the present invention is applicable not only to single radio frequency coil is automatically positioned and is selected, and applies also for and multiple radio-frequency coils are automatically positioned and are selected.
Describe specific embodiments of the invention although above-mentioned already in connection with accompanying drawing, but those skilled in the art are without departing from the spirit and scope of the present invention, it is possible to the present invention is carried out various change, amendment and equivalent substitution. These changes, amendment and equivalent substitution all mean and fall within the spirit and scope that appended claims limits.
Claims (16)
1. the method for automatically determining the position of the radio-frequency coil in MR imaging apparatus, described MR imaging apparatus includes for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, and described method includes step:
Mapping table between traveling time and the displacement of described movable carriage is provided, and stores it in MR imaging apparatus;
Coil label is arranged in the first pre-position on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector in order to detect described coil label is arranged in the second pre-position in MR imaging apparatus, wherein, when described coil label along with movable carriage to the movement of magnet through described detector, described detector detects described coil label;
Record described detector and the time of described coil label detected;
Described mapping table is searched, the distance that during to determine the described coil label arrival described detector corresponding with the described time, described movable carriage moves through according to the described time recorded; And
The band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition is determined according to determined described distance and the information about the first and second precalculated positions,
Wherein, information about described first precalculated position indicates the described coil label distance apart from each edge of described radio-frequency coil or indicates described coil label apart from the distance at each edge of each coil subdivision, and wherein indicates described second precalculated position relative position in described MR imaging apparatus about the information in described second precalculated position.
2. the method for claim 1, wherein determine according to determined described distance and the information about the first and second precalculated positions that the step of the band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition farther includes:
Described coil label position on described movable carriage is determined according to determined described distance and the information about the second precalculated position; And
According to described coil label position on described movable carriage and about the information in the first precalculated position, it is determined that each coil subdivision of radio-frequency coil described in described radio-frequency coil or the composition band of position on described movable carriage.
3. method as claimed in claim 2, wherein, determine that the step of described coil label position on described movable carriage includes according to determined described distance and the information about the second precalculated position: deduct, by the distance in described second precalculated position to the starting point of described sick bed support, the described distance determined according to described mapping table and obtain described coil label position on described movable carriage.
4. the method for claim 1, wherein described second precalculated position relative position in described MR imaging apparatus is described second precalculated position distance to the starting point of described sick bed support.
5. method as claimed in claim 1 or 2, wherein, described coil label is RFID tag, and described detector is radio-frequency readers.
6. method as claimed in claim 5, wherein, described mapping table and the information about the first precalculated position and the information about the second precalculated position are stored in described RFID tag.
7. method as claimed in claim 1 or 2, wherein, described mapping table and the information about the first precalculated position and the information about the second precalculated position are stored in the data base of described MR imaging apparatus, and described data base is positioned at described MR imaging apparatus or it controls in the memory module of computer.
8. the method for automatically selecting the radio-frequency coil in MR imaging apparatus, described MR imaging apparatus includes for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, and described method includes step:
Mapping table between traveling time and the displacement of described movable carriage is provided, and stores it in MR imaging apparatus;
Coil label is arranged in the first pre-position on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector in order to detect described coil label is arranged in the second pre-position in MR imaging apparatus, wherein, when described coil label along with movable carriage to the movement of magnet through described detector, described detector detects described coil label;
Record described detector and the time of described coil label detected;
Described mapping table is searched, the distance that during to determine the described coil label arrival described detector corresponding with the described time, described movable carriage moves through according to the described time recorded;
The band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition is determined according to determined described distance and the information about the first and second precalculated positions; And
Treat the selection at scanning position in response to operator, according to described radio-frequency coil or composition, the band of position of each coil subdivision of radio-frequency coil automatically selects the coil subdivision of radio-frequency coil or the radio-frequency coil being suitable to described position to be scanned,
Wherein, information about described first precalculated position indicates the described coil label distance apart from each edge of described radio-frequency coil or indicates described coil label apart from the distance at each edge of each coil subdivision, and wherein indicates described second precalculated position relative position in described MR imaging apparatus about the information in described second precalculated position.
9. a MR imaging apparatus, including for providing the magnet in magnetic field, for moving with the movable carriage moving in magnet by patient and radio-frequency coil on sick bed support, wherein said MR imaging apparatus also includes:
Memory module, in described memory module, storage has the mapping table between traveling time and the displacement of described movable carriage;
The coil label of the first pre-position being arranged on described radio-frequency coil, is wherein placed in the surroundings thereof on movable carriage at radio-frequency coil described in the use procedure of MR imaging apparatus;
The detector of the second pre-position being arranged in MR imaging apparatus, in order to detect described coil label, wherein, when described coil label along with movable carriage to the movement of magnet through described detector, described detector detects described coil label;
Control device, it is configured to record described detector and the time of described coil label detected, and search described mapping table according to the described time recorded, to obtain the distance that when the described coil label corresponding with the described time arrives described detector, described movable carriage moves through; And
Calculation element, its information being configured to according to the described distance obtained and about the first and second precalculated positions calculates the band of position of each coil subdivision of radio-frequency coil described in described radio-frequency coil or composition,
Wherein, information about described first precalculated position indicates the described coil label distance apart from each edge of described radio-frequency coil or indicates described coil label apart from the distance at each edge of each coil subdivision, and wherein indicates described second precalculated position relative position in described MR imaging apparatus about the information in described second precalculated position.
10. MR imaging apparatus as claimed in claim 9, wherein, described control device is additionally configured to treat the selection at scanning position in response to operator, and according to described radio-frequency coil or composition, the band of position of each coil subdivision of radio-frequency coil automatically selects the coil subdivision of radio-frequency coil or the radio-frequency coil being suitable to described position to be scanned.
11. the MR imaging apparatus as described in claim 9 or 10, wherein, described calculation element farther includes:
Marker location computing unit, it is configured to the information according to the described distance obtained and about the second precalculated position and determines described coil label position on described movable carriage; And
Band of position computing unit, it is configured to according to described coil label position on described movable carriage and about the information in the first precalculated position, it is determined that each coil subdivision of radio-frequency coil described in described radio-frequency coil or the composition band of position on described movable carriage.
12. MR imaging apparatus as claimed in claim 11, wherein, described marker location computing unit deducts, by the distance in described second precalculated position to the starting point of described sick bed support, the described distance obtained according to described mapping table and obtains described coil label position on described movable carriage.
13. MR imaging apparatus as claimed in claim 9, wherein, described second precalculated position relative position in described MR imaging apparatus is described second precalculated position distance to the starting point of described sick bed support.
14. the MR imaging apparatus as described in claim 9 or 10, wherein, described coil label is RFID tag, and described detector is radio-frequency readers.
15. MR imaging apparatus as claimed in claim 14, wherein, described RFID tag stores the information about the first precalculated position and the information about the second precalculated position.
16. the MR imaging apparatus as described in claim 9 or 10, wherein, the information about the first precalculated position and the information about the second precalculated position are stored in described memory module.
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| CN104181933A (en) * | 2013-05-21 | 2014-12-03 | 上海联影医疗科技有限公司 | Medical object position control method and device |
| CN104644171B (en) * | 2013-11-19 | 2019-06-28 | 上海联影医疗科技有限公司 | Localization method and device for magnetic resonance system |
| JP6632368B2 (en) * | 2015-12-21 | 2020-01-22 | キヤノン株式会社 | Information processing device, photoacoustic device, information processing method, and program |
| CN105476635B (en) | 2015-12-29 | 2019-02-05 | 沈阳东软医疗系统有限公司 | The localization method and device of radio-frequency coil in a kind of MRI system |
| CN107861079B (en) * | 2017-11-03 | 2020-04-24 | 上海联影医疗科技有限公司 | Method for local coil localization, magnetic resonance system and computer-readable storage medium |
| CN108303674A (en) * | 2018-01-03 | 2018-07-20 | 上海东软医疗科技有限公司 | The localization method and device of magnetic resonance imaging system receiving coil |
| CN108344960B (en) * | 2018-02-09 | 2020-09-25 | 上海东软医疗科技有限公司 | Coil unit gating method and device for magnetic resonance imaging system |
| CN108968961A (en) * | 2018-07-11 | 2018-12-11 | 芜湖帮许来诺医疗设备科技有限公司 | A kind of magnetic resonance integrated form is scanning bed and its control method |
| EP3644085A1 (en) * | 2018-10-25 | 2020-04-29 | Siemens Healthcare GmbH | Selection of measuring coils in magnetic resonance imaging |
| DE102019218285A1 (en) * | 2019-11-26 | 2021-05-27 | Siemens Healthcare Gmbh | Head coil arrangement with automatically positionable transmitter coil unit |
| CN113933770B (en) * | 2021-11-25 | 2022-06-28 | 浙江大学 | Component layout method and system based on radio frequency emission surface coil and coil |
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| DE102004022559B4 (en) * | 2004-05-07 | 2006-05-18 | Siemens Ag | Method and control device for determining the position of a local coil, magnetic resonance tomograph and computer program product |
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| DE102008040003A1 (en) * | 2008-08-27 | 2009-01-29 | Siemens Aktiengesellschaft | Magnetic resonance device for patient, has signal receiving device arranged at magnetic unit, and positioning device with evaluation device connected with signal receiving device for evaluating data i.e. operating time detecting signal |
| JP5582739B2 (en) * | 2008-09-09 | 2014-09-03 | 株式会社東芝 | Magnetic resonance imaging apparatus and method for controlling magnetic resonance imaging apparatus |
| 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 |
| DE102009004448B4 (en) * | 2009-01-13 | 2012-05-24 | Siemens Aktiengesellschaft | Coil position detection |
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