CN103876741A - Adjustable MRI head coil device and MRI system - Google Patents
Adjustable MRI head coil device and MRI system Download PDFInfo
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- CN103876741A CN103876741A CN201310705632.3A CN201310705632A CN103876741A CN 103876741 A CN103876741 A CN 103876741A CN 201310705632 A CN201310705632 A CN 201310705632A CN 103876741 A CN103876741 A CN 103876741A
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Abstract
An adjustable MRI head coil apparatus includes a plurality of plates. Each of the plurality of plates includes a plurality of RF receiving elements arranged in a fixed direction. The adjustable MRI head coil apparatus further includes a bracket connected to at least one of the plurality of plates. The cradle includes a spherical head mechanism configured to enable the adjustable MRI head coil assembly to tilt in at least one direction.
Description
the cross reference of related application
The application is the U.S. Patent application the 13/246th that JIUYUE in 2011 is submitted on the 28th, the part continuation application of No. 938 and advocate the priority of described application.
Technical field
The present invention relates in general to adjustable MRI head coil device and MRI system.Adjustable MRI head coil device and MRI system comprise multiple plates, and described multiple plate capable of regulatings are to adapt to various different patient's head sizes.
Background technology
NMR (Nuclear Magnetic Resonance)-imaging (MRI) is kind of a medical imaging pattern, can in the situation that not using X ray or other ionizing radiations, form inside of human body image.MRI forms strong even static magnetic field (, " main magnetic field ") with powerful magnet.In the time that a part for human body or human body is placed in main magnetic field, the nuclear spin associated with proton in tissue water becomes polarization.This means, become preferably and align along main magnetic direction with the magnetic moment of these spin correlations, thereby cause along little clean tissue (the small net tissue) magnetization of this axis (being z axle by custom).MRI system also can comprise the assembly that is known as gradient coil, in the time that electric current is applied on it, can produce more by a small margin, the magnetic field of spatial variations.Conventionally, gradient coil is through design to produce magnetic-field component, and described magnetic-field component is alignd along z axle, and with the position of in x, y or z axle, linear change occurs in amplitude.Gradient coil effect is in magnetic field intensity and and then on the resonant frequency of nuclear spin, forms little slope (ramp) along single shaft.There are three gradient coils of normal axis for coming MR signal " spatially coding " by form labelling resonant frequency (signature resonance frequency) in each position of health.Conventionally, radio frequency (RF) coil for the resonant frequency place of proton or near formation RF energy pulse.RF coil is for adding energy to nuclear spin system by controlled way.When nuclear spin is when relaxation is got back to its rest energy state subsequently, it releases energy with RF signal form.RF signal is detected and be transformed into image with computer and known restructing algorithm by MRI system.
RF receiving coil generally includes a large amount of RF receiving elements separately, and described independent RF receiving element can adopt phased array to arrange.Each size and relative orientation in tuning RF receiving element, to provide optimum for particular magnetic field strength.For to the conventional RF receiving coil of head imaging normally rigidity and through optimize with the large patient of engagement head.But in order to obtain best signal to noise ratio, it is important that RF receiving element is positioned to approach as much as possible patient's head.Because exemplary head coil through design to adapt to large patient's head, therefore, when come when compared with the imaging of microcephaly portion, conventionally to have too much space with conventional head coil.The image that this can cause picture quality to be lowered.Therefore, for these and other reasons, need a kind of adjustable MRI head coil, described adjustable MRI head coil is adjusted to coordinate various head sizes.In addition, patient may meet with as bow-backed situation, under this type of situation, does not allow patient's head parallel with magnet or patient's stand longitudinal axis.Therefore, need a kind of MRI coil, scan when patient's head and magnet axis are with certain angle inclination to allow.
Summary of the invention
According to an aspect of the present invention, provide a kind of adjustable MRI head coil device, described adjustable MRI head coil device comprises: multiple plates, and each in described multiple plates comprises that multiple RF receiving elements, described multiple RF receiving elements press fixed-direction and arrange; And support, described support is connected at least one in described multiple plate, and described support comprises spherical head mechanism, and described spherical head mechanism is configured to make described adjustable MRI head coil device to tilt at least one direction.
Preferably, wherein said multiple plates comprise backboard, and described backboard is suitable for being worn over after patient's head, and described support is connected on described backboard.
Preferably, wherein said multiple plates comprise header board, and described backboard is suitable for being worn over before patient's head.
Preferably, wherein said header board is connected on described backboard by the first articulated arm.
Preferably, wherein said multiple plates comprise left plate, and described left plate is suitable for being worn over the left side of patient's head.
Preferably, wherein said left plate is connected on described backboard by the second articulated arm.
Preferably, wherein said multiple plates comprise right panel, and described right panel is suitable for being worn over the right side of patient's head.
Preferably, wherein said right panel is connected on described backboard by the 3rd articulated arm.
Preferably, wherein said header board, described backboard, described left plate and described right panel comprise complementary shape, and described complementary shape combines with the head around described patient substantially.
According to another aspect of the present invention, provide a kind of adjustable MRI head coil device, described adjustable MRI head coil device comprises: backboard, and described backboard comprises more than first RF receiving element and is suitable for being worn over after patient's head; Header board, described header board comprises more than second RF receiving element; The first articulated arm, described the first articulated arm couples together described header board and described backboard; Left plate, described left plate comprises the 3rd many RF receiving elements; The second articulated arm, described the second articulated arm couples together described left plate and described backboard; Right panel, described right panel comprises the 4th many RF receiving elements; And the 3rd articulated arm, described the 3rd articulated arm couples together described right panel and described backboard.
Preferably, it further comprises support, and described support is connected on described backboard, and described support comprises spherical head mechanism, and described spherical head mechanism is configured to make adjustable MRI head coil device to tilt at least one direction.
Preferably, wherein said header board, described backboard, described left plate and described right panel are configured to combine by complimentary fashion.
Preferably, wherein said the first articulated arm is configured to make described header board to move to closed position from open position.
Preferably, wherein said the second articulated arm is configured to make described left plate to move to closed position from open position.
Preferably, wherein said the 3rd articulated arm is configured to make described right panel to move to closed position from open position.
Accompanying drawing explanation
By reference to the accompanying drawings, will understand more fully the present invention by following detailed description, wherein similar numeral indication similar part, wherein:
Fig. 1 is according to the schematic block diagram of exemplary nuclear magnetic resonance imaging (MRI) system of embodiment;
Fig. 2 is schematically illustrating according to the side view of the adjustable MRI head coil device of embodiment;
Fig. 3 schematically illustrates according to the plan view of the adjustable MRI head coil device of embodiment;
Fig. 4 is schematically illustrating according to the see-through view of the RF receiving element orientation of the side plate of embodiment, header board and backboard;
Fig. 5 is schematically illustrating according to the side-looking see-through view of the adjustable MRI head coil device of alternate embodiment;
Fig. 6 is schematically illustrating according to the plan view of the adjustable MRI head coil device of alternate embodiment;
Fig. 7 is schematically illustrating according to the side view of the adjustable MRI head coil device of the spherical head support of embodiment;
Fig. 8 is schematically illustrating according to the side view of the adjustable MRI head coil device of the spherical head support of embodiment; And
Fig. 9 is schematically illustrating according to the see-through view of the adjustable MRI head coil device of the spherical head support of embodiment.
The specific embodiment
In the following specific embodiment, with reference to accompanying drawing (accompanying drawing forms a part for the specific embodiment), and in the accompanying drawings, in explanation mode, enforceable specific embodiment is shown.These embodiment are described with abundant details, so that one of skill in the art can implement each embodiment, and should understand, other embodiment also can use, and in the case of not deviating from the scope of embodiment, can make logic, machinery, electric and other changes.Therefore, below describe in detail and be not regarded as limiting the scope of the invention.
Fig. 1 is according to the schematic block diagram of exemplary nuclear magnetic resonance imaging (MRI) system of embodiment.MRI system 10 operates by the operator's console 12 that comprises keyboard or other input equipment 13, control panel 14 and display 16 and controls.Control station 12 communicate by letter with computer system 20 by link 18 and carry out regulation MRI scanning for operator provide interface, show gained image, for image carries out image processing and by data and picture archiving.Computer system 20 comprises multiple modules, and described multiple modules are for example connected and communicated with one another by (as by using backboard 20a to provide) electrical connection and/or data.Data connection can be direct wire link, or can be optical fiber connection or wireless communication link etc.Module in computer system 20 comprises image processor block 22, CPU module 24 and memory module 26, and memory module 26 can comprise that frame buffer is with storing image data array.In an alternate embodiment, image processor block 22 can be substituted by the image processing function in CPU module 24.Computer system 20 is linked on archives mediation device, permanent or backup of memory or network.Computer system 20 also can be communicated by letter with separate payment control computer 32 by link 34.Input equipment 13 can comprise mouse, handle, keyboard, trace ball, Touch Screen, optical wand, voice control or any similar or equivalent input equipment, and can be for mutual how much indications (interactive geometry prescription).
The gradient waveform being produced by pulse generator module 38 is applied to by G
x, G
yand G
zthe gradient amplifier system 42 of amplifier composition.Each gradient amplifier encourages corresponding physics gradient coil in gradient coil assembly 50, and described gradient coil assembly 50 is specified substantially for generation of magnetic field gradient pulse, for the signal that spatially coding gathers.Gradient coil assembly 50 forms a part for resonance assembly 52, comprising superconducting magnet 54.Resonance assembly 52 can comprise as the RF main coil 56 of adjustable MRI head coil device 78 and/or surface or local RF coil.Coil 56,78 in RF coil block can be configured to transmit simultaneously and receive, only transmit or only receive.Adjustable MRI head coil device 78 can be RF receiving element array, wherein each RF receiving element independent detection MR signal.Adjustable MRI head coil device 78 will be described in detail hereinafter in addition.
Patient or imaging object 70 can be positioned in the cylindrical hole in resonance assembly 52.Transceiver module 58 in system control computer 32 produces pulse, and described pulse is amplified by RF amplifier 60 and is coupled to RF coil 56,78 by transmission/reception switch 62.Gained signal by the nuclear emission exciting in patient can and be coupled on preamplifier 64 by transmission/reception switch 62 by any sensing in RF coil 56,78.Demodulation in the receptor section of MR signal through amplifying at transceiver 58, filtering digitized.Transmission/reception switch 62 is connected on RF main coil 56 preamplifier 64 by the signal controlling from pulse generator 38 to make RF amplifier 60 be connected electrically on RF main coil 56 and in receiving mode process in transfer mode phase process.Transmission/reception switch 62 also can make independent RF coil in transmission or receiving mode, to use.MRI system 10 has also comprised the processor 80 that can be connected to communicatedly adjustable MRI head coil device 78.Processor 80 can be for controlling adjustable MRI head coil device 78 positions.According to another embodiment, the processing capacity of being carried out by processor 80 can also be carried out by other processors in MRI system.According to other embodiment, operator can carry out input command so that adjusting adjustable MRI head coil device 78 locates with operator's console 12, or operator can come adjustable MRI head coil device 78 input commands by independent control interface (and not shown).
By the MR signal of RF main coil 56 and/or MRI head coil device 78 sensings by transceiver module 58 digitizeds and transfer in the memory module 66 in system control computer 32.Conventionally, be temporarily stored in memory module 66 corresponding to the frame of the data of MR signal, until it converts to form image subsequently.Array processor 68 use known transform methods are come from MR signal formation image, and modal alternative approach is Fourier transformation.These images are delivered to computer system 20 by link 34, at computer system 20 places, are stored in internal memory.The order that response receives from operator's console 12, view data can be archived in long term memory, or can process further described view data and be transported to operator's console 12 and be presented on display 16 by image processor 22.
As mentioned above, RF main coil 56 can be used for transmitting RF pumping signal in transfer mode, and can in receiving mode, be used for detecting with the similar surface coils of MRI head coil device 78 signal of being launched by object.Provide (one or more) decoupling loop when coil is transmitting RF pumping signal, in transfer mode process, to make 78 decouplings of MRI head coil device or inefficacy to transmit at RF main coil 56 or different RF.
With reference to Fig. 2, the schematically illustrating of side view of the adjustable MRI head coil device 78 in Fig. 1 is shown.In Fig. 2, adjustable MRI head coil device 78 is depicted as in the closed position.With reference to Fig. 3, the schematically illustrating of plan view of adjustable MRI head coil device 78 is shown.In Fig. 3, adjustable MRI head coil device 78 is depicted as in an open position.Identical Reference numeral is for identical parts between marked graph 1,2 and 3.
Referring now to Fig. 2 and Fig. 3, adjustable MRI head coil device 78 comprises header board 81, backboard 82, left plate 84 and right panel 86.Adjustable MRI head coil device 78 comprises fixture 88, arm 90, base 92 and flexible pipe 94.Each in plate 81,82,84,86 comprises multiple RF receiving elements, and described multiple RF receiving elements are arranged in array.According to an embodiment, header board 81 and backboard 82 can be included in the RF receiving element between 6 to 8 separately, and each in side plate 84,86 comprises 10 RF receiving elements.Other embodiment can be in plate each middle use varying number RF receiving element.For example, header board 81 and backboard 82 can comprise 6 to 8 RF receiving elements separately, and side plate 84,86 can comprise 8 to 10 RF receiving elements separately.According to an embodiment, RF receiving element is separately can be dimensionally substantially similar and be rectangle in shape substantially.But according to other embodiment, RF receiving element can be difform.For example, one or more receiving element in receiving element can be difform, comprises circle, ellipse, hexagon or any other shape.RF receiving element is formed by the conductor as copper, and each in plate 81,82,84,86 by RF receiving element rigid locking in fixed orientation.
Fig. 4 is schematically illustrating according to the see-through view of the RF receiving element orientation of the side plate 130 of embodiment, header board 132 and backboard 134.Side plate 130, header board 132 and backboard are expressed as the discrete component that adopts removably, so that RF receiving element orientation to be shown better.According to exemplary embodiment, complete adjustable MRI head coil device will comprise side plate 132, side plate 132 mirror images, header board 132 and backboard 134, thereby essence is around patient's head.
Again comprise patient 70 with reference to Fig. 2 and 3, Fig. 2 and 3, to the cooperation relevant with patient's head 96 of adjustable MRI head coil device 78 is shown.For example, header board 81 is suitable for being worn over before patient's head 96.Header board 81 can be shaped as and limit two eye shape otch 97.Each in eye shape otch 97 is configured to be engaged in patient's eye top, and MRI head coil device 78 is in its closed position, as shown in Figure 2.Eye shape otch 97 allows patient 70 to check its peripheral situation and can contribute to alleviate the claustrophobia sense in some patients were during in its closed position at MRI head coil device 78.Header board 81 also can formalize to adapt to patient's nose.For example, header board 81 is engaged in the roof beam structure 99 of patient's nose top with formation through setting.This just allows the RF receiving element in header board 81 to coordinate more closely patient's head.In other embodiment, header board 81 can be shaped as it is not extended on patient's nose.According to other other embodiment, the plate in adjustable MRI head coil device can be made up of the transparent material as transparent plastic.According to these embodiment and may and nonessential eye shape otch.
According to an embodiment, header board 81, left plate 84 and right panel 86 can be connected on backboard 82, as illustrated in Figures 5 and 6.Fig. 5 is schematically illustrating according to the side-looking see-through view of the adjustable MRI head coil device of alternate embodiment.Fig. 6 is schematically illustrating according to the plan view of the adjustable MRI head coil device of alternate embodiment.Common Reference numeral is for similar parts between marked graph 1,2,3,5 and 6.In Fig. 5 and 6, adjustable MRI head coil device 78 is depicted as in an open position.
Referring now to Fig. 5 and Fig. 6, adjustable MRI head coil device 78 comprises header board 81, backboard 82, left plate 84 and right panel 86.As above discussed, each in plate 81,82,84 and 86 comprises multiple RF receiving elements, and described multiple RF receiving elements are arranged in array.Fig. 5 and 6 comprises patient 70, to illustrate adjustable MRI head coil device 78 is how to coordinate with patient's head 96.Backboard 82 be suitable for being worn over patient's head 96 after.Header board 81 is connected on backboard 82 by the first articulated arm 142, and described the first articulated arm is configured to allow header board 81 to rotate between open position and closed position.As above discussed, header board 81 is suitable for being worn over before patient's head 96, and can be shaped as two eye shape otch 97 of restriction.Left plate 84 is connected on backboard 82 by the second articulated arm 144, and described the second articulated arm is configured to allow left plate 84 to rotate between open position and closed position.Right panel 86 is connected on backboard 82 by the 3rd articulated arm 146, and described the 3rd articulated arm is configured to allow right panel 86 to rotate between open position and closed position.As above discussed, left plate 84 is suitable for being worn on patient's head 96 left sides, and right panel 86 is suitable for being worn on patient's head 96 right sides.
Refer again to Fig. 2 and Fig. 3, according to an embodiment, the each fixture 88 that is connected in plate 81,82,84,86.Fixture 88 can be installed to arm 90, and described arm 90 is configured to translate across base 92.According to another embodiment, fixture 88 and arm 90 can be integral type parts.MRI head coil device 78 comprises actuating mechanism (actuator mechanism) 112.According to each embodiment, actuating mechanism 112 can comprise pneumatic circuit, vacuum loop or one or more motor.According to the embodiment shown in Fig. 2 and 3, actuating mechanism 112 is pneumatic circuit.Actuating mechanism 112 comprises: pressurizing vessel (and not shown), and described pressurizing vessel is preserved compressed air; Flexible pipe 94, compressed air is advanced through described flexible pipe 94; And accessory, described accessory is connected to each in plate 81,82,84,86.Actuating mechanism 112 comprises one or more valves, and compressed air is directed to the one or more of plate 81,82,84,86 by described one or more valves.Exactly, by changing the air pressure of part of the pneumatic circuit to being connected to specified panel 81,82,84,86, actuating mechanism in can panel 81,82,84,86 each relative to each other with the position, angle of fixture 88.That is to say, actuating mechanism 112 control header board 80 around the position, angle of a pivot 98, left plate 84 around the position, angle of the second pivot 102, right panel 86 around the position, angle of the 3rd pivot 106 and backboard 82 around the position, angle of the 4th pivot 107.According to other embodiment, actuating mechanism 112 can comprise multiple motors of pneumatic circuit or for example servomotor, and it is attached to each in plate 81,82,84,86.For using the embodiment of multiple motors, should understand, each in motor can be attached to separately each in plate 81,82,84,86, or each motor can be connected to two or more plates by link mechanism (and not shown).For example, link mechanism can allow the position, angle of all plates in single motor while panel 81,82,84,86.In another embodiment, can come with friction the position of retaining plate 81,82,84 and 86.Arm can be adjusted by reducing friction, can be used to prevent undesirable joint of plate 81,82,84 and 86 and increase to rub.Or, locking mechanism (and not shown) can be provided and come the position of retaining plate 81,82,84 and 86.
Still, with reference to Fig. 2 and 3, arm 90 can be adaptive for translating across base 92 by linear mode.For example, in Fig. 3, arm 90 is shown as in the retracted position away from patient's head 96 more, and in Fig. 2, arm 90 is shown as in the extended position in more approaching patient's head 96.The position of arm 90 can be adjusted or be adjusted by actuating mechanism 112 by motor (and not shown).According to an embodiment, actuating mechanism 112 can comprise pneumatic circuit, and described pneumatic circuit is configured to the position of control arm 100 with respect to base 92.
Adjustable MRI head coil device 78 can comprise attached or be integrated into the sensor 116 on one or more in plate 81,82,84,86.Sensor 116 can be pressure transducer, capacitance sensor, laser sensor or any other sensor that is configured to determine plate 81,82,84,86 distances with respect to patient 70 or pressure.By adjustable MRI head coil device 78 be coupled to patient 70 can according to embodiment be manually, part is automatic or completely automatic.
Adjust to coordinate patient 70 embodiment according to wherein adjustable MRI head coil device 78 is automatic, operator for example can carry out initiation process by the input in control panel 14 (shown in Fig. 1), thereby start to coordinate adjustable MRI head coil device 78.To similar shown in Fig. 3, adjustable MRI head coil device 78 is depicted as in an open position.Actuating mechanism 112 can start with translation plates in longitudinal direction by making arm 90 move through base 92.According to an embodiment, patient's head 96 can be placed on support 118 (shown in Fig. 2).Support 118 can be with base 92 at a distance of known distance, and therefore, processor 80 (shown in Figure 1) can be determined suitable distance and carry out translation plates.According to other embodiment, processor 80 can rely on from the data of other sensor (and not shown) determines the translation which position to stop arm 90 in.According to another embodiment, adjustable MRI head coil device 78 can be arranged in the hole of superconducting magnet 54 (shown in Fig. 1) of MRI system 10 (shown in Fig. 1).Thus, adjustable MRI head coil device 78 can be configured to be positioned at etc. that center (isocenter) is located or the visual field (field-of-view) of MRI system is located.For example, according to exemplary embodiment, adjustable MRI head coil device 78 can be arranged on the centers such as MRI system.If adjustable MRI head coil device 78 is arranged on the centers such as MRI system, even so remove patient from MRI system time, adjustable MRI head coil device still can be in centers such as MRI systems.Because adjustable MRI head coil device 78 during in known location tuning MRI system be possible, therefore, make adjustable MRI head coil device 78 in etc. center can be favourable.According to other embodiment, adjustable MRI head coil device 78 can not have the arm for the similar arm 90 of translation plates 81,82,84,86.On the contrary, in other embodiment, translation stage 49 (shown in Fig. 1) can be for being positioned at right positions place by patient with respect to adjustable MRI head coil device.
In another embodiment, support 118 can be spherical head mechanism, as shown in Fig. 7,8 and 9.Fig. 7 is schematically illustrating according to the side view of the adjustable MRI head coil device of the spherical head support of embodiment.Fig. 8 is schematically illustrating according to the side view of the adjustable MRI head coil device of the spherical head support of embodiment.Fig. 9 is schematically illustrating according to the see-through view of the adjustable MRI head coil device of the spherical head support of embodiment.Common Reference numeral is for similar parts between marked graph 1,2,3,7,8 and 9.In Fig. 7, adjustable MRI head coil device 78 is depicted as wherein that header board 81 is in an open position and right panel 86 is in the close position.In Fig. 8 and 9, adjustable MRI head coil device 78 is depicted as in an open position.
Fig. 7,8 and Fig. 9 in, adjustable MRI head coil device 78 comprises header board 81, backboard 82, left plate 84 and right panel 86.Fig. 7,8 and 9 comprises patient 70, to illustrate adjustable MRI head coil device 78 is how to coordinate with patient's head 96.Spherical head support 150 is connected on backboard 82.The known spherical head mechanisms in affiliated field for the spherical head mechanism of support 150.Spherical head support 150 is configured to allow adjustable MRI head coil device 78 and patient's head 96 in obliquity.For example, in Fig. 8, adjustable MRI head coil device 78 is shown as with upwards (or forward) inclination with the longitudinal axis 152 angled 160 of magnet or patient's stand (and not shown).In one embodiment, support 150 allows coil device 78 (, backward or forward) rotation in any direction left, to the right.In another embodiment, spherical head support 150 allows to tilt at the most 45 ° from axis 152.In another example, in Fig. 9, adjustable MRI head coil device 78 is shown as and uses support 150 to be tilted to the left.Preferably, support 150 is connected to patient's stand (and not shown).In one embodiment, can pass spherical head support 150 for the cable (and not shown) MRI head coil device 78 being connected on for example power supply (and not shown), processor 80 (shown in Fig. 1), computer 20 (shown in Fig. 1) or computer 32 (shown in Fig. 1).
According to other embodiment, adjustable MRI head coil device 78 can be configured to use together with MRI/PET hybrid system.In typical mr I/PET research, first gathering MRI image provides anatomic information and then gathers PET image function information is provided, typically about radiopharmaceutic picked-ups such as such as fluorodeoxyglucose (FDG).Subsequently, can MRI image and PET image be registered and be merged, to provide to radiologist or oncologist the image that shows anatomical data and performance data.For typical mr I/PET research, patient may be moved to the PET part in MRI/PET hybrid system at the part of the MRI from MRI/PET hybrid system.According to an embodiment, adjustable MRI head coil device 78 can be particularly suited for MRI/PET research, and this is because adjustable MRI head coil device 78 makes patient's head remain in fixed position.In addition, the plate in adjustable MRI head coil device 78 can by a minimum level the PET system that decays be used for material and the thickness of gamma ray of synthetic image and make.
Then, processor 80 (shown in Fig. 1) can be controlled actuating mechanism 112 so that each in plate 81,82,84,86 moved to closed position from open position.Actuating mechanism 112 can carry out movable plate by the air pressure of adjusting in pneumatic circuit, so that each in movable plate 81,82,84,86.Processor 80 is from being positioned at the each reception feedback in the sensor 116 plate 81,82,84,86.Sensor 116 be configured to check-out console 81,82,84,86 when in patient's head 96 at a distance of preset distance place or plate 81,82,84,86 when under predetermined pressure level, contact patient 70.Ideally, in order to realize optimum picture quality, each in plate 81,82,84,86 will contact patient's head 96 lightly.When the relative patient's head 96 of plate 81,82,84,86 is during in correct position, processor 80 is controlled actuating mechanism 112 to stop movable plate.
As seen in Figure 2, header board 81, backboard 82 and right panel 86 are all shaped as with complimentary fashion and are combined together.Although in Fig. 2 and invisible, left plate 84 is also shaped as with complimentary fashion and header board 81 and backboard 82 and is combined together.In other words, header board 81, backboard 82, left plate 84 and right panel 86 are through formalizing to it is engaged one another at closed position place, thus the continuous or approximately continuous array around patient's head of formation RF receiving element.Once in correct position, actuating mechanism 112 lockplate positions are for for imaging process.By lockplate position, more easily make patient's head 96 remain in resting position, obtain MRI view data simultaneously.In imaging process, still make patient's head 96 keep static meeting to contribute to picture quality, this is especially because some MRI acquisition sequence may continue some minutes or the longer time.
This description is used various examples to disclose the present invention, comprises optimal mode, and under making, any technical staff in field can manufacture and use the present invention.Scope of patent protection of the present invention is defined by the claims, and can comprise other examples that one of skill in the art find out.If the structural element that these type of other examples have is identical with the letter of claims, if or the equivalent structure element that comprises of these type of other examples and the letter of claims there is no essential difference, these type of other examples are also in the scope of claims so.According to each alternate embodiment, the order of any process or method step and sequence all can change or sequencing again.
In the situation that not deviating from spirit of the present invention, can make many other changes and modification to the present invention.The scope of these and other changes will be clear from appended claims.
Claims (15)
1. an adjustable MRI head coil device, described adjustable MRI head coil device comprises:
Multiple plates, each in described multiple plates comprises that multiple RF receiving elements, described multiple RF receiving elements press fixed-direction and arrange; And
Support, described support is connected at least one in described multiple plate, and described support comprises spherical head mechanism, and described spherical head mechanism is configured to make described adjustable MRI head coil device to tilt at least one direction.
2. adjustable MRI head coil device according to claim 1, wherein said multiple plates comprise backboard, described backboard is suitable for being worn over after patient's head, and described support is connected on described backboard.
3. adjustable MRI head coil device according to claim 2, wherein said multiple plates comprise header board, described backboard is suitable for being worn over before patient's head.
4. adjustable MRI head coil device according to claim 3, wherein said header board is connected on described backboard by the first articulated arm.
5. adjustable MRI head coil device according to claim 3, wherein said multiple plates comprise left plate, described left plate is suitable for being worn over the left side of patient's head.
6. adjustable MRI head coil device according to claim 5, wherein said left plate is connected on described backboard by the second articulated arm.
7. adjustable MRI head coil device according to claim 5, wherein said multiple plates comprise right panel, described right panel is suitable for being worn over the right side of patient's head.
8. adjustable MRI head coil device according to claim 7, wherein said right panel is connected on described backboard by the 3rd articulated arm.
9. adjustable MRI head coil device according to claim 7, wherein said header board, described backboard, described left plate and described right panel comprise complementary shape, described complementary shape combines with the head around described patient substantially.
10. an adjustable MRI head coil device, described adjustable MRI head coil device comprises:
Backboard, described backboard comprises more than first RF receiving element and is suitable for being worn over after patient's head;
Header board, described header board comprises more than second RF receiving element;
The first articulated arm, described the first articulated arm couples together described header board and described backboard;
Left plate, described left plate comprises the 3rd many RF receiving elements;
The second articulated arm, described the second articulated arm couples together described left plate and described backboard;
Right panel, described right panel comprises the 4th many RF receiving elements; And
The 3rd articulated arm, described the 3rd articulated arm couples together described right panel and described backboard.
11. adjustable MRI head coil devices according to claim 10, it further comprises support, described support is connected on described backboard, and described support comprises spherical head mechanism, and described spherical head mechanism is configured to make adjustable MRI head coil device to tilt at least one direction.
12. adjustable MRI head coil devices according to claim 10, wherein said header board, described backboard, described left plate and described right panel are configured to combine by complimentary fashion.
13. adjustable MRI head coil devices according to claim 10, wherein said the first articulated arm is configured to make described header board to move to closed position from open position.
14. adjustable MRI head coil devices according to claim 10, wherein said the second articulated arm is configured to make described left plate to move to closed position from open position.
15. adjustable MRI head coil devices according to claim 10, wherein said the 3rd articulated arm is configured to make described right panel to move to closed position from open position.
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| Application Number | Priority Date | Filing Date | Title |
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| US13/720,053 US20130131498A1 (en) | 2011-09-28 | 2012-12-19 | Adjustable mri head coil apparatus and mri system |
| US13/720,053 | 2012-12-19 |
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| CN103876741A true CN103876741A (en) | 2014-06-25 |
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