CN106371045B - Interventional magnetic resonance receiving coil assembly and magnetic resonance equipment - Google Patents
Interventional magnetic resonance receiving coil assembly and magnetic resonance equipment Download PDFInfo
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- CN106371045B CN106371045B CN201610989759.6A CN201610989759A CN106371045B CN 106371045 B CN106371045 B CN 106371045B CN 201610989759 A CN201610989759 A CN 201610989759A CN 106371045 B CN106371045 B CN 106371045B
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- -1 polyoxymethylene Polymers 0.000 description 6
- 229920006351 engineering plastic Polymers 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 5
- 238000013152 interventional procedure Methods 0.000 description 5
- 238000002595 magnetic resonance imaging Methods 0.000 description 5
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- 230000006835 compression Effects 0.000 description 2
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- 229920002492 poly(sulfone) Polymers 0.000 description 2
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- 239000004417 polycarbonate Substances 0.000 description 2
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- 229920001721 polyimide Polymers 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- Radiology & Medical Imaging (AREA)
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- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention discloses a magnetic resonance receiving coil assembly and magnetic resonance equipment. The receiving coil assembly comprises a coil main body, a bracket and a base; the base is used for placing the coil main body and the bracket; the bracket passes through the interior of the coil body and is fixed on the base for providing support for a patient; the base comprises a first base, a second base, a third base, a fourth base, an angle adjusting unit, an X-displacement unit and a Y-displacement unit. The magnetic resonance receiving coil assembly can move to realize accurate positioning of the receiving coil, and is more convenient to operate.
Description
Technical Field
The invention relates to an interventional magnetic resonance receiving coil assembly and a magnetic resonance device, in particular to a movable interventional magnetic resonance receiving coil assembly and a magnetic resonance device.
Background
A magnetic resonance system is a device for medical image diagnosis that is capable of providing clear, accurate images of human anatomy. The main principle of the magnetic resonance system is as follows: nuclei in the magnetic field, after being excited by a short electromagnetic wave of a certain frequency, emit an electromagnetic wave signal of a frequency equal to the excitation frequency, and the signal is collected by a receiving coil and transmitted to a signal processing device (such as a computer) for processing to form an image.
In minimally invasive interventional procedures, nuclear magnetic resonance is used to pre-scan the surgical site prior to surgery in order to plan the epidermis insertion point, the needle (or thorn, shaft, etc.) path, and the target site location of the needle (or thorn, shaft, etc.). The physician inserts a needle (or spike, shaft, etc.) into the patient according to the planned path. The patient's surgical site is scanned again by the nmr system to check if the needle (or spike, rod, etc.) position is accurate. For receiving coils used in magnetic resonance interventions, the quality of the local scan imaging of the surgical site is generally required to be relatively high, while the quality of the image outside the surgical site is required to be relatively low. In a magnetic resonance system, the design ideas of the transmitting coil assembly and the receiving coil assembly are completely different, so that the two fields are different.
In magnetic resonance scanning, the patient's region to be scanned and the receive coil imaging region should be within a uniform region of the magnetic field. In magnetic resonance interventional procedures, the position of the patient's region to be scanned in the magnetic field can be adjusted by moving the scan bed so that it is within a uniform region of the magnetic field. However, if the receive coil imaging region does not coincide with the patient's site to be scanned, the scan bed needs to be moved out of the magnet and the patient then moved for readjustment. This results in a substantial reduction in the efficiency of the procedure. In addition, patients after anesthesia are inconvenient to move, which also increases the difficulty of the operation. Thus, repositioning may be achieved by moving the coil.
For example, CN201398969Y discloses a magnetic resonance imaging apparatus with a movable body coil, which comprises a magnet generating a steady basic magnetic field, a gradient coil generating a fast on-off gradient field, a radio frequency transmitting coil transmitting radio frequency signals and at least one body coil receiving radio frequency signals, wherein the body coil is arranged in one piece with the magnetic resonance imaging apparatus and is movably arranged on a support structure and is movable by the support structure into and out of the magnet interior in the longitudinal direction of the magnet. The supporting structure of the patent document is a telescopic connecting rod, and accurate positioning of the receiving coil cannot be realized.
As another example, CN104055517a discloses a magnetic resonance imaging apparatus comprising: a patient bed for positioning a patient; the positioning unit is used for controlling the movement and positioning of the sickbed; the body radio frequency coil is used for transmitting and receiving radio frequency signals; a local coil, the local coil comprising: the fixed coil device is positioned below the sickbed and is used for covering the back surface of the part needing to be scanned currently to receive radio frequency signals; a movable coil arrangement located above the patient bed, the movable coil arrangement comprising: the radio frequency receiving coil is used for receiving radio frequency signals; and the mechanical arm is used for moving the radio frequency receiving coil to be attached to the front surface of the part needing to be scanned currently. The magnetic resonance imaging equipment adopts the mechanical arm to move the receiving coil, has no other auxiliary setting, and increases the difficulty of accurate positioning.
Disclosure of Invention
One of the purposes of the invention is to provide an interventional magnetic resonance receiving coil assembly which can move to realize accurate positioning of a receiving coil, and the operation is more convenient.
It is a further object of the invention to provide a magnetic resonance apparatus which does not require moving the scan bed and the patient, and which allows accurate repositioning of the coils by movement of the receive coils themselves.
The inventors of the present application have conducted intensive studies and found that the following technical scheme can achieve the above object.
The invention provides a magnetic resonance receiving coil assembly, which comprises a coil main body, a bracket and a base; the base is used for placing the coil main body and the bracket; the bracket passes through the interior of the coil body and is fixed on the base for providing support for a patient; the base comprises a first base, a second base, a third base, a fourth base, an angle adjusting unit, an X-displacement unit and a Y-displacement unit; the X direction is the placement direction of the coil main body, and the Y direction is the direction perpendicular to the placement direction of the coil main body and in the plane of the base;
the upper surface of the first base is provided with a coil groove which is matched with the bottom of the coil main body, and the coil groove is used for placing the coil main body and fixing the coil main body on the first base;
the first base and the second base are movably connected on one side in the X direction and are connected through the angle adjusting unit in the Y direction;
the second base and the third base realize relative displacement in the Y direction through the Y-direction displacement unit;
the third base and the fourth base realize relative displacement in the X direction through the X-direction displacement unit.
According to the receiving coil assembly of the present invention, preferably, the single-side movable connection is a single-side hinge.
According to the receiving coil assembly of the present invention, preferably, the Y-direction displacement unit includes a Y-direction sliding unit, a Y-direction driving unit, and a Y-direction limiting unit; the Y-direction sliding unit is used for setting a path of relative displacement of the second base and the third base in the Y direction; the Y-direction driving unit is used for driving the second base and the third base to relatively displace in the Y direction; the Y-direction limiting unit is used for fixing the second base on the fourth base; and
the X-direction displacement unit comprises an X-direction sliding unit, an X-direction driving unit and an X-direction limiting unit; the X-direction sliding unit is used for setting a path of relative displacement of the third base and the fourth base in the X direction; the X-direction driving unit is used for driving the third base and the fourth base to relatively displace in the X direction; the X-direction limiting unit is used for fixing the third base on the fourth base.
According to the receiving coil assembly of the present invention, preferably, the Y-direction sliding unit includes a Y-direction sliding rail disposed on an upper surface of the third base, and a Y-direction sliding rail seat disposed on a lower surface of the second base and engaged with the Y-direction sliding rail;
the Y-direction driving unit comprises a Y-direction rack, a Y-direction gear, a Y-direction knob and a Y-direction transmission shaft; the Y-direction rack is arranged on the second base; the Y-direction gear is connected with the Y-direction knob through the Y-direction transmission shaft, and the Y-direction gear, the Y-direction knob and the Y-direction transmission shaft are arranged to be capable of synchronously rotating; the Y-direction gear is matched with the Y-direction rack to drive the second base and the third base to relatively displace in the Y direction; the Y-direction knob is freely rotatably fixed on the fourth base; and
the Y-direction limiting unit comprises a Y-direction limiting block arranged above the Y-direction rack and a Y-direction limiting groove arranged on the fourth base.
According to the receiving coil assembly of the present invention, preferably, the X-direction sliding unit includes an X-direction sliding rail disposed on an upper surface of the fourth base, and an X-direction sliding rail seat disposed on a lower surface of the third base and engaged with the X-direction sliding rail;
the X-direction driving unit comprises an X-direction rack, an X-direction gear, an X-direction knob and an X-direction transmission shaft; the X-direction rack is arranged on the third base; the X-direction gear is connected with the X-direction knob through the X-direction transmission shaft, and the X-direction gear, the X-direction knob and the X-direction transmission shaft are arranged to be capable of synchronously rotating; the X-direction gear is matched with the X-direction rack to drive the third base and the fourth base to relatively displace in the X direction; the X-direction knob is freely rotatably fixed on the fourth base; and
the X-direction limiting unit comprises an X-direction limiting block arranged above the X-direction rack and an X-direction limiting groove arranged on the fourth base.
According to the receiving coil assembly of the present invention, preferably, the Y-direction rack is provided at a lower surface of the second base and extends in the Y-direction from one side of the second base; the X-direction rack is arranged on the upper surface of the third base; the fourth base is provided with a Y-direction knob groove for accommodating the Y-direction knob and a Y-direction transmission shaft hole for accommodating the Y-direction transmission shaft; the fourth base is also provided with an X-direction knob groove for accommodating the X-direction knob and an X-direction transmission shaft hole for accommodating the X-direction transmission shaft.
According to the receiving coil assembly of the present invention, preferably, the angle adjusting unit includes a stud, a nut, and a pressing plate; the screw bolt is arranged on the first base, the screw nut is arranged on the screw bolt, and the pressing plate is arranged on the second base; and the pressing plate is arranged between the rotating nut and the first base, sleeved on the stud and used for fixing the first base on the second base.
According to the receiving coil assembly of the present invention, preferably, the pressing plate is provided with a bump on a surface at a contact position with the first base, and the first base is provided with a rubber pad on a surface at a contact position with the pressing plate.
Preferably, the receiving coil assembly according to the present invention is an interventional magnetic resonance receiving coil assembly.
The invention also provides a magnetic resonance apparatus comprising:
a magnet generating a stable basic magnetic field;
gradient coils that generate gradient fields;
a transmitting coil assembly for transmitting radio frequency signals; and
and the receiving coil component is used for receiving the radio frequency signals and is used for receiving the radio frequency signals.
By adopting the magnetic resonance receiving coil assembly and the magnetic resonance equipment, the coil main body can move in the X direction and the Y direction and can adjust the angle in the Z direction, so that the accurate positioning of the receiving coil can be realized by moving the coil main body per se, and the operation is more convenient. According to the preferred technical scheme of the invention, the position of the coil main body can be regulated in a controlled way, so that more accurate positioning of the receiving coil can be realized. The magnetic resonance receiving coil assembly and the magnetic resonance device can be used for imaging a plurality of parts of a human body, in particular for imaging the neck and the waist. The magnetic resonance receiving coil assembly and the magnetic resonance equipment are particularly suitable for interventional operations.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a receiving coil assembly according to the present invention.
Fig. 2 is a schematic structural view of a base of a receiving coil assembly according to the present invention.
Fig. 3 is a cross-sectional view of a base of a receiver coil assembly of the present invention.
Fig. 4 is an exemplary view of a receive coil assembly of the present invention for use in a cervical magnetic resonance interventional procedure.
Fig. 5 is a schematic general structure of another receiving coil assembly according to the present invention.
The reference numerals are explained as follows:
1-a coil body; 11-upper coil; 12-lower coil; 13-a locking mechanism;
2-a bracket; 21-a first scaffold; 22-a second bracket;
3-a base; 31-a first base; 32-a second base; 33-a third mount; 34-fourth base; 311-coil grooves; 351-Y direction limiting blocks; 352-Y direction knob; 353-Y direction transmission shaft; 354-Y direction transmission shaft hole; 355-Y direction gear; 356-Y knob slots; 357-Y direction rack; 358-Y direction slide rail; 359-Y direction slide rail seat; 361-X limiting blocks; 362-X directional knob; 363-X direction transmission shaft; 365-X direction gear; 366-X direction knob groove; 367-X direction rack; 368-X direction slide rail; 369-X direction slide rail seat; 371-spinning mother; 372-platen.
Detailed Description
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto.
The interventional operation of the invention refers to an operation of introducing special precision instruments into a human body under the guidance of medical imaging equipment to diagnose and locally treat in-vivo pathological conditions, and is usually a minimally invasive operation.
The X direction of the invention is the length direction of the base, namely the placement direction of the coil main body; the Y direction is the width direction of the base, namely the direction perpendicular to the placement direction of the coil main body and in the plane of the base; the Z direction is the height direction of the base, i.e., the direction perpendicular to the plane of the base. The meaning of X direction is the same as that of X direction, the meaning of Y direction is the same as that of Y direction, and the meaning of Z direction is the same as that of Z direction.
The magnetic resonance receiving coil assembly comprises a coil main body, a support and a base, wherein the base is used for placing the coil main body and the support. The following is a detailed description.
< coil body >
The coil body of the present invention may be of various shapes to accommodate various parts of the human body. Preferably, the coil body of the present invention is annular or ring-like. The coil body may include separable upper and lower coils, and may further include a locking mechanism for locking the upper and lower coils; preferably, the two locking mechanisms are respectively positioned at the joint positions of the upper coil and the lower coil. The upper coil and the lower coil are electrically connected by an electrical connector. The upper coil includes an upper coil housing and an electrical component accommodated therein; the lower coil includes a lower coil housing and an electrical component housed therein. The upper coil housing and the lower coil housing may be made of engineering plastics. In the present invention, main examples of engineering plastics include, but are not limited to, polycarbonate, polyamide, polyoxymethylene, polyphenylene oxide, polyester (e.g., polyethylene terephthalate PET or polybutylene terephthalate PBT), polyphenylene sulfide or polyarylate, and the like; other examples include, but are not limited to, polyimide, polyphenylene sulfide, polysulfone, aromatic polyamide, or fluororesin, etc.
< stent >
The support of the present invention is used to provide support for a patient, for example for supporting the neck of a patient. The bracket of the invention passes through the interior of the coil body and is fixed on the base. The stand of the present invention may comprise a support platform and two support arms at both ends of the support platform, the support platform being fixedly connected to the base, e.g. a fourth base, by means of the support arms. The shape of the support platform is preferably concave arc-shaped, so that comfortable support is provided for the neck of a human body. Taking an annular coil main body as an example for explanation, the supporting platform is erected on the annular inner side of the coil main body, the lower coil is positioned between the supporting platform and the base, and the upper coil is positioned above the supporting platform. The material of the bracket of the invention can be engineering plastics; specific examples include, but are not limited to, polycarbonates, polyamides, polyoxymethylene, polyphenylene oxide, polyesters (e.g., polyethylene terephthalate PET or polybutylene terephthalate PBT), polyphenylene sulfide, polyarylates, polyimides, polyphenylene sulfide, polysulfones, aromatic polyamides or fluororesins, and the like. The stent of the present invention may be designed to be ergonomic in construction.
< base >
The base comprises a first base, a second base, a third base, a fourth base, an angle adjusting unit, an X-displacement unit and a Y-displacement unit.
In the invention, the upper surface of the first base is provided with a coil groove which is matched with the bottom of the coil main body, and the coil groove is used for placing the coil main body and fixing the coil main body on the first base. According to one embodiment of the invention, the coil groove is shaped to match the shape of the bottom of the coil body, thereby facilitating a secure connection of the two. Preferably, the coil groove is rectangular and is surrounded by four side plates and a bottom plate. More preferably, the four side plates and the one bottom plate are integrally formed. In order to fix the coil body firmly in the coil groove, locking devices, such as jackscrews, spring plates and the like, can be mounted on the X-direction side plate and the Y-direction side plate of the first base.
In the invention, the first base and the second base are movably connected on one side in the X direction and are connected through the angle adjusting unit in the Y direction. In the invention, the single side is movably connected to indicate that one side of the first base is connected with one side of the second base, the displacement of the two is small, and the other side of the first base and the other side of the second base can generate larger displacement. The manner in which the one side of the present invention is movably connected is not particularly limited. Preferably, the single side is movably connected in a single side hinge manner.
In the invention, the first base and the second base are connected in the Y direction by the angle adjusting unit. According to one embodiment of the invention, the angle adjusting unit comprises a stud, a nut and a pressing plate; the screw bolt is arranged on the first base, the screw nut is arranged on the screw bolt, and the pressing plate is arranged on the second base; and the pressing plate is arranged between the rotating nut and the first base, sleeved on the stud and used for fixing the first base on the second base. According to one embodiment of the invention, the studs are arranged on two Y-direction side plates of the first base, two nuts are respectively fixed on the studs, and two pressing plates are respectively and vertically arranged above the second base. The pressing plate is provided with a pore canal which is used for being sleeved on the stud. The sectional area of the hole channel is larger than that of the stud, so that the angle of the first base can be conveniently adjusted. After screwing the nut, the pressing plate is pressed on the first base, so that the first base and the second base are fixedly connected together.
In the present invention, an anti-slip structure may be provided at a position where the pressing plate contacts the first base. For example, the pressing plate is provided with a bump on a surface of a contact position with the first base, and the first base is provided with a rubber pad on a surface of a contact position with the pressing plate. The combination of the salient points and the rubber cushion plays a role in skid resistance.
In the invention, the second base and the third base realize relative displacement in the Y direction through the Y-direction displacement unit. The Y-direction displacement unit comprises a Y-direction sliding unit, a Y-direction driving unit and a Y-direction limiting unit.
The Y-direction sliding unit is used for setting the path of relative displacement of the second base and the third base in the Y direction so as to ensure that the second base moves on the third base along a specific path, thereby being convenient for accurate control. According to one embodiment of the invention, the Y-direction sliding unit comprises a Y-direction sliding rail arranged on the upper surface of the third base and a Y-direction sliding rail seat which is arranged on the lower surface of the second base and matched with the Y-direction sliding rail. The Y-direction sliding rail can be linear, and the Y-direction sliding rail seat can also be linear. The sectional shapes of the Y-direction slide rail and the Y-direction slide rail seat of the present invention are not particularly limited.
The Y-direction driving unit is used for driving the second base and the third base to relatively displace in the Y direction. According to one embodiment of the invention, the Y-direction driving unit comprises a Y-direction rack, a Y-direction gear, a Y-direction knob and a Y-direction transmission shaft; the Y-direction rack is arranged on the second base; the Y-direction gear is connected with the Y-direction knob through the Y-direction transmission shaft, and the Y-direction gear, the Y-direction knob and the Y-direction transmission shaft are arranged to be capable of synchronously rotating; the Y-direction gear is matched with the Y-direction rack to drive the second base and the third base to relatively displace in the Y direction; the Y-direction knob is freely rotatably fixed on the fourth base. The Y-direction rack is preferably arranged on the lower surface of the second base and extends from one side of the second base along the Y direction, so that the second base can be controlled to move in the Y direction conveniently. According to one embodiment of the invention, the width of the Y-direction rack is greater than the width of the Y-direction gear. This is more advantageous for the Y-direction gear to slide on the Y-direction rack in the X-direction. And the fourth base is provided with a Y-direction knob groove and a Y-direction transmission shaft hole which are respectively used for accommodating the Y-direction knob and the Y-direction transmission shaft. And the end face of the Y-direction knob can be printed with a pointer for controlling the displacement of the first base and the second base relative to the third base in the Y direction.
The Y-direction limiting unit is used for fixing the second base on the fourth base. According to one embodiment of the invention, the Y-direction limiting unit comprises a Y-direction limiting block arranged above the Y-direction rack and a Y-direction limiting groove arranged on the fourth base. The Y-direction limiting block can comprise a Y-direction limiting jacking column and a Y-direction limiting pressure spring which are equivalent to the tooth profile of the Y-direction rack. When the locking is needed, the end head of the Y-direction limiting jacking column is inserted between two teeth of the Y-direction rack, and the Y-direction limiting pressure spring ensures that the Y-direction limiting jacking column cannot be automatically separated from the rack.
In the invention, the third base and the fourth base are relatively displaced in the X direction through the X displacement unit. The X-direction displacement unit comprises an X-direction sliding unit, an X-direction driving unit and an X-direction limiting unit.
The X-direction sliding unit is used for setting the path of relative displacement of the third base and the fourth base in the X direction so as to ensure that the third base moves on the fourth base along a specific path, thereby being convenient for accurate control. According to one embodiment of the present invention, the X-direction sliding unit includes an X-direction sliding rail disposed on an upper surface of the fourth base, and an X-direction sliding rail seat disposed on a lower surface of the third base and engaged with the X-direction sliding rail. The X-direction sliding rail can be linear, and the X-direction sliding rail seat can also be linear. The cross-sectional shapes of the X-direction slide rail and the X-direction slide rail seat of the present invention are not particularly limited.
The X-direction driving unit is used for driving the third base and the fourth base to relatively displace in the X direction. According to one embodiment of the invention, the X-direction drive unit comprises an X-direction rack, an X-direction gear, an X-direction knob and an X-direction drive shaft. The X-direction rack is arranged on the third base; the X-direction gear is connected with the X-direction knob through the X-direction transmission shaft, and the X-direction gear, the X-direction knob and the X-direction transmission shaft are arranged to be capable of synchronously rotating; the X-direction gear is matched with the X-direction rack to drive the third base and the fourth base to relatively displace in the X direction; the X-direction knob is freely rotatably fixed on the fourth base. The X-direction rack is preferably arranged on the upper surface of the third base; the fourth base is also provided with an X-direction knob groove and an X-direction transmission shaft hole which are respectively used for accommodating the X-direction knob and the X-direction transmission shaft. The end face of the X-direction knob can be printed with a pointer for controlling the displacement of the first base, the second base and the third base relative to the fourth base in the X direction.
The X-direction limiting unit is used for fixing the third base on the fourth base. According to one embodiment of the invention, the X-direction limiting unit comprises an X-direction limiting block arranged above the X-direction rack and an X-direction limiting groove arranged on the fourth base. The X-direction limiting block can comprise an X-direction limiting top column and an X-direction limiting pressure spring, wherein the X-direction limiting top column and the X-direction limiting pressure spring are equivalent to the tooth profile of the X-direction rack. When the locking is needed, the end head of the X-direction limiting jacking column is inserted between two teeth of the X-direction rack, and the X-direction limiting pressure spring ensures that the X-direction limiting jacking column cannot be automatically separated from the rack.
< receiving coil Assembly >
The magnetic resonance receiving coil assembly of the present invention comprises the coil body, the bracket and the base. The base is used for placing the coil main body and the bracket. The base comprises a first base, a second base, a third base and a fourth base. The bracket of the invention is supported on the fourth base. On the one hand, the bracket and the fourth base can be fixedly connected; on the other hand, the bracket and the fourth base can be detachably connected, and an anti-skid member or a limiting structure, such as a positioning column, is arranged. The support is disposed within the loop of the coil body to provide comfortable support for the patient. The two ends of the fourth base may be provided with elongated holes, respectively, which serve as handles of the fourth base. The middle part of fourth base has seted up the bar groove for hold first base, second base and third base. The first base, the second base and the third base are sequentially arranged from top to bottom. The first base is connected with the second base through an angle adjusting unit; a Y-direction sliding unit is arranged between the second base and the third base; an X-direction sliding unit is arranged between the third base and the fourth base.
According to one embodiment of the invention, the stent is divided into two parts, a first stent and a second stent, respectively. The first bracket and the second bracket are fixedly arranged on the fourth base. The middle part of fourth base has seted up the bar groove for hold first base, second base and third base. The first bracket and the second bracket are respectively positioned at two sides of the strip-shaped groove.
The receive coil assembly of the present invention is preferably an interventional magnetic resonance receive coil assembly. Interventional magnetic resonance refers to a magnetic resonance imaging system for interventional procedures.
In the interventional operation, the receiving coil assembly can assist in completing the interventional operation of different parts through different placement modes aiming at different operation parts. When the coil main body needs to be repositioned, the Y-direction limiting block, the X-direction limiting block or the angle adjusting unit is opened, and the coil main body is locked again after being adjusted to a proper position.
< magnetic resonance apparatus >
The magnetic resonance apparatus of the present invention includes a magnet that generates a stable basic magnetic field; gradient coils that generate gradient fields; a transmitting coil assembly for transmitting radio frequency signals; and a receiving coil assembly for receiving the radio frequency signal. In the present invention, the magnet, gradient coil and transmit coil assembly may be those known in the art and will not be described in detail herein. The receiving coil assembly for receiving the radio frequency signal may adopt the receiving coil assembly of the present invention, and will not be described herein.
Example 1
Fig. 1 shows a magnetic resonance receiving coil assembly according to the present invention, which is a receiving coil assembly for interventional magnetic resonance, and includes a coil body 1, a support 2 and a base 3, wherein the base 3 is used for placing the coil body 1 and the support 2.
The coil body 1 includes a separable upper coil 11, lower coil 12, and locking mechanism 13. The number of the locking mechanisms 13 is two, and the locking mechanisms are respectively positioned at the joint positions of the upper coil 11 and the lower coil 12. The upper coil 11 and the lower coil 12 are electrically connected by an electrical connector. The upper coil 11 includes an upper coil housing and electrical components accommodated therein; the lower coil 12 includes a lower coil housing and electrical components housed therein. The upper coil housing and the lower coil housing are made of engineering plastic polyamide.
The support 2 is used to provide support for the neck of the patient, which passes through the annular interior of the coil body 1 secured to the first base 31. The stand 2 comprises a support platform and two support arms at both ends of the support platform, the support platform being fixedly connected to the fourth base 34 by means of the support arms (see fig. 1 and 2). The shape of the support platform is preferably concave arc-shaped, so that comfortable support is provided for the neck of a human body. The support platform is erected on the annular inner side of the coil body 1, the lower coil 12 is positioned between the support platform and the base 3, and the upper coil 11 is positioned above the support platform. The bracket 2 is made of engineering plastic polyamide.
Fig. 2 and 3 are schematic views showing a base structure of a magnetic resonance receiving coil assembly according to the present invention. The base 3 includes a first base 31, a second base 32, a third base 33, a fourth base 34, an angle adjusting unit, an X-displacement unit, and a Y-displacement unit.
The upper surface of the first base 31 has a coil groove 311 corresponding to the bottom of the lower coil 12 of the coil body 1 for placing the coil body 1 and fixing it on the first base 31. The coil groove 311 is rectangular, and is an integrally formed structure surrounded by four side plates and a bottom plate. Spring pieces (not shown) are arranged on the inner sides of the four side plates, and after the bottom of the lower coil 12 of the coil main body 1 enters the coil groove 311, the spring pieces squeeze the lower coil 12 of the coil main body 1, so that the stability of the coil main body 1 is ensured.
The first base 31 is unilaterally hinged with the second base 32 in the X direction and is connected with the second base through an angle adjusting unit in the Y direction. The angle adjusting unit of the present invention includes a stud (not shown), a screw 371, and a pressing plate 372. The stud is disposed on the first base 31, the nut 371 is disposed on the stud, and the platen 372 is disposed on the second base 32. The pressing plate 372 is located between the nut 371 and the first base 31 and sleeved on the stud for fixing the first base 31 on the second base 32. The studs are disposed on two Y-direction side plates of the first base 31, two nuts 371 are respectively fixed on the studs, and two pressing plates 372 are respectively vertically disposed above the second base 32. The pressing plate 372 is provided with a hole channel for being sleeved on the stud. The cross-sectional area of the hole is larger than that of the stud, so that the angle of the first base 31 can be adjusted conveniently. After screwing the screw 371, the pressing plate 372 is pressed against the first base 31, thereby fixedly connecting the first base 31 and the second base 32 together. The pressing plate 372 is provided with a bump on a surface of a contact position with the first base 31, and the first base 31 is provided with a rubber pad on a surface of a contact position with the pressing plate 372. The two are combined to play a role of skid resistance.
The second base 32 and the third base 33 are relatively displaced in the Y direction by the Y displacement unit. The Y-direction displacement unit comprises a Y-direction sliding unit, a Y-direction driving unit and a Y-direction limiting unit.
The Y-direction sliding unit of the present invention includes a Y-direction sliding rail 358 disposed on the upper surface of the third base 33, and a Y-direction sliding rail seat 359 disposed on the lower surface of the second base 32 and cooperating with the Y-direction sliding rail. The Y-direction slide rail 358 and the Y-direction slide rail seat 359 are both linear. The Y-direction slide rail seat 359 is a groove formed on the lower surface of the second base 32. This ensures that the second base 32 moves along a specific path on the third base 33, facilitating accurate control of the displacement.
The Y-direction drive unit of the present invention includes a Y-direction rack 357, a Y-direction gear 355, a Y-direction knob 352, and a Y-direction drive shaft 353. The Y-direction rack 357 is provided at a lower surface of the second base 32 and extends in the Y-direction from one side of the second base 32, so as to control the movement of the second base 32 in the Y-direction. The Y-direction gear 355 and the Y-direction knob 352 are connected by a Y-direction transmission shaft 353, and the three are provided so as to be rotatable in synchronization. The Y-gear 355 cooperates with the Y-rack 357 to drive the second base 32 to displace relative to the third base 33 in the Y-direction; the width of the Y-direction rack 357 is greater than the width of the Y-direction gear 355, which is more beneficial for the Y-direction gear 355 to slide on the Y-direction rack 357 in the X-direction. The Y-direction knob 352 is rotatably fixed to the fourth base 34. The fourth base 34 is provided with a Y-direction knob slot 356 and a Y-direction drive shaft aperture 354 for receiving the Y-direction knob 352 and the Y-direction drive shaft 354, respectively. The end surface of the Y-direction knob 352 is printed with a pointer for more precisely indicating and controlling the displacement of the first and second bases 31 and 32 with respect to the third base 33 in the Y-direction.
The Y-direction limiting means of the present invention includes a Y-direction limiting block 351 provided above a Y-direction rack 357, and a Y-direction limiting groove (not shown) provided on the fourth base 34. The Y-direction stopper 351 includes a Y-direction stopper post and a Y-direction stopper compression spring (not shown) corresponding to the tooth profile of the Y-direction rack 357. When the locking is needed, the end head of the Y-direction limiting jacking column is inserted between two teeth of the Y-direction rack 357, and the Y-direction limiting pressure spring ensures that the Y-direction limiting jacking column cannot be automatically separated from the Y-direction rack 357. The second base 32 can be fixed to the fourth base 34 by the Y-direction limiting unit of the present invention.
The third mount 33 and the fourth mount 34 are relatively displaced in the X direction by the X displacement unit. The X-direction displacement unit comprises an X-direction sliding unit, an X-direction driving unit and an X-direction limiting unit.
The X-direction sliding unit of the present invention includes an X-direction sliding rail 368 disposed on the upper surface of the fourth base 34, and an X-direction sliding rail seat 369 disposed on the lower surface of the third base 33 and cooperating with the X-direction sliding rail 368. The X-direction slide rails 368 and the X-direction rail mount 369 are both linear. The X-direction slide rail seat 369 is a groove formed on the lower surface of the third base 33. This ensures that the third base 33 moves along a specific path on the fourth base 34, facilitating accurate control.
The X-direction drive unit of the present invention includes an X-direction rack 367, an X-direction gear 365, an X-direction knob 362, and an X-direction drive shaft 363. The X-direction rack 367 is provided on the upper surface of the third base 33; the X-direction gear 365 and the X-direction knob 362 are connected by an X-direction transmission shaft 636, and the three are provided so as to be rotatable in synchronization. The X-direction gear 365 cooperates with the X-direction rack 367 to drive the third mount 33 in relative displacement in the X-direction with the fourth mount 34. The X-direction knob 362 is rotatably fixed to the fourth base 34. The width of the X-direction rack 367 is equal to the width of the X-direction gear 365, so that the size of the third base 33 can be reduced. The fourth base 34 is further provided with an X-direction knob slot 366, an X-direction drive shaft hole (not shown) for receiving the X-direction knob 362 and the X-direction drive shaft 363, respectively. The end surface of the X-direction knob 362 is printed with a pointer for more precisely indicating and controlling the displacement of the first, second, and third bases 31, 32, 33 with respect to the fourth base 34 in the X-direction.
The X-direction limiting unit of the present invention includes an X-direction limiting block 361 provided above the X-direction rack 367, and an X-direction limiting groove (not shown) provided on the fourth base 34. The X-direction stopper 361 includes an X-direction stopper post and an X-direction stopper compression spring (not shown) corresponding to the tooth profile of the X-direction rack 367. When the locking is needed, the end head of the X-direction limiting jacking column is inserted between two teeth of the X-direction rack 367, and the X-direction limiting pressure spring ensures that the X-direction limiting jacking column cannot be automatically separated from the X-direction rack 367. The third base 33 is fixed to the fourth base 34 by the X-direction limiting unit of the present invention.
The bracket 2 is detachably connected with the fourth base 34 and is provided with a slip prevention member. The two ends of the fourth base 34 are respectively provided with a long strip hole as a handle. The middle part of the fourth base 34 is provided with a bar-shaped groove for accommodating the first base 31, the second base 32 and the third base 33.
In interventional operation, the receiving coil assembly can assist in completing interventional operation of different parts by different placing modes aiming at different operation parts. Fig. 4 is an exemplary view of a receive coil assembly of the present invention for use in a cervical magnetic resonance interventional procedure. When the coil body 1 needs to be repositioned, the Y-direction limiting block 351 and the X-direction limiting block 361 are opened or the rotating nut 371 serving as an angle adjusting unit is used for locking again after the coil body 1 is adjusted to a proper position.
The following description will be given by taking Y-direction adjustment as an example only. The Y-direction limiting block 351 is opened, the Y-direction knob 352 is rotated to drive the Y-direction transmission shaft 353 to rotate, and meanwhile, the Y-direction gear 355 is driven to move relatively on the surface of the Y-direction rack 357. Since the Y-axis transmission shaft 353 is defined in the Y-axis transmission shaft hole 354 of the fourth base 34, the Y-axis rack 357 moves in the Y-direction, thereby driving the second base 32 to move along the path defined by the Y-axis sliding rail 358 on the third base 33, and thus precisely controlling the displacement of the second base 32 relative to the third base 33.
Example 2
Figure 5 is another magnetic resonance receive coil assembly of the present invention. In this embodiment, the bracket 2 is divided into two parts, a first bracket 21 and a second bracket 22, respectively. The first bracket 21 and the second bracket 22 are fixedly mounted on the fourth base 34. The middle part of the fourth base 34 is provided with a bar-shaped groove for accommodating the first base 31, the second base 32 and the third base 33. The first and second brackets 21 and 22 are located on both sides of the bar-shaped groove, respectively. The remaining components and conditions were the same as in example 1.
The height of the holder 2 in this embodiment can be lower than that of embodiment 1, and the coil main body 1 is not restricted by the holder when moving in the X direction, so that a larger moving distance in the X direction can be obtained. When the coil body 1 is required to be taken out from the first base 31, the bracket 2 does not need to be moved, and the operation is more convenient.
The present invention is not limited to the above-described embodiments, and any modifications, improvements, substitutions, and the like, which may occur to those skilled in the art, fall within the scope of the present invention without departing from the spirit of the invention.
Claims (6)
1. A magnetic resonance receive coil assembly, the receive coil assembly comprising a coil body, a support and a base; the base is used for placing the coil main body and the bracket; the bracket passes through the interior of the coil body and is fixed on the base for providing support for a patient; the base comprises a first base, a second base, a third base, a fourth base, an angle adjusting unit, an X-displacement unit and a Y-displacement unit; the X direction is the placement direction of the coil main body, and the Y direction is the direction perpendicular to the placement direction of the coil main body and in the plane of the base;
the upper surface of the first base is provided with a coil groove which is matched with the bottom of the coil main body, and the coil groove is used for placing the coil main body and fixing the coil main body on the first base;
the first base and the second base are movably connected on one side in the X direction and are connected through the angle adjusting unit in the Y direction;
the second base and the third base realize relative displacement in the Y direction through the Y-direction displacement unit;
the third base and the fourth base realize relative displacement in the X direction through the X-direction displacement unit;
the angle adjusting unit comprises a stud, a rotating nut and a pressing plate; the screw bolt is arranged on the first base, the screw nut is arranged on the screw bolt, and the pressing plate is arranged on the second base; the pressing plate is arranged between the rotating nut and the first base, sleeved on the stud and used for fixing the first base on the second base;
the Y-direction displacement unit comprises a Y-direction sliding unit, a Y-direction driving unit and a Y-direction limiting unit;
the Y-direction sliding unit comprises a Y-direction sliding rail arranged on the upper surface of the third base and a Y-direction sliding rail seat which is arranged on the lower surface of the second base and matched with the Y-direction sliding rail;
the Y-direction driving unit comprises a Y-direction rack, a Y-direction gear, a Y-direction knob and a Y-direction transmission shaft; the Y-direction rack is arranged on the second base; the Y-direction gear is connected with the Y-direction knob through the Y-direction transmission shaft, and the Y-direction gear, the Y-direction knob and the Y-direction transmission shaft are arranged to be capable of synchronously rotating; the Y-direction gear is matched with the Y-direction rack to drive the second base and the third base to relatively displace in the Y direction; the Y-direction knob is freely rotatably fixed on the fourth base; the width of the Y-direction rack is larger than that of the Y-direction gear; and
the Y-direction limiting unit comprises a Y-direction limiting block arranged above the Y-direction rack and a Y-direction limiting groove arranged on the fourth base; the Y-direction limiting block comprises a Y-direction limiting top column and a Y-direction limiting pressure spring, wherein the Y-direction limiting top column and the Y-direction limiting pressure spring are equivalent to the tooth profile of the Y-direction rack; when the locking is needed, the end head of the Y-direction limiting jacking column is inserted between two teeth of the Y-direction rack, and the Y-direction limiting pressure spring ensures that the Y-direction limiting jacking column cannot be automatically separated from the Y-direction rack;
the X-direction displacement unit comprises an X-direction sliding unit, an X-direction driving unit and an X-direction limiting unit;
the X-direction sliding unit comprises an X-direction sliding rail arranged on the upper surface of the fourth base and an X-direction sliding rail seat which is arranged on the lower surface of the third base and matched with the X-direction sliding rail;
the X-direction driving unit comprises an X-direction rack, an X-direction gear, an X-direction knob and an X-direction transmission shaft; the X-direction rack is arranged on the third base; the X-direction gear is connected with the X-direction knob through the X-direction transmission shaft, and the X-direction gear, the X-direction knob and the X-direction transmission shaft are arranged to be capable of synchronously rotating; the X-direction gear is matched with the X-direction rack to drive the third base and the fourth base to relatively displace in the X direction; the X-direction knob is freely rotatably fixed on the fourth base; the width of the X-direction rack is equal to that of the X-direction gear; and
the X-direction limiting unit comprises an X-direction limiting block arranged above the X-direction rack and an X-direction limiting groove arranged on the fourth base; the X-direction limiting block comprises an X-direction limiting top column and an X-direction limiting pressure spring, wherein the X-direction limiting top column and the X-direction limiting pressure spring are equivalent to the tooth profile of the X-direction rack; when the locking is needed, the end head of the X-direction limiting jacking column is inserted between two teeth of the X-direction rack, and the X-direction limiting pressure spring ensures that the X-direction limiting jacking column cannot be automatically separated from the X-direction rack.
2. The receiver coil assembly of claim 1 wherein the single-sided movable connection is a single-sided hinge.
3. The receiver coil assembly of claim 1 wherein the Y-direction rack is disposed on a lower surface of the second base and extends in the Y-direction from one side of the second base; the X-direction rack is arranged on the upper surface of the third base; the fourth base is provided with a Y-direction knob groove for accommodating the Y-direction knob and a Y-direction transmission shaft hole for accommodating the Y-direction transmission shaft; the fourth base is also provided with an X-direction knob groove for accommodating the X-direction knob and an X-direction transmission shaft hole for accommodating the X-direction transmission shaft.
4. The receiver coil assembly of claim 1 wherein the pressure plate is provided with bumps on a surface in contact with the first base, the first base being provided with a rubber pad on a surface in contact with the pressure plate.
5. The receive coil assembly of any one of claims 1 to 4, wherein the receive coil assembly is an interventional magnetic resonance receive coil assembly.
6. A magnetic resonance apparatus, characterized in that the magnetic resonance apparatus comprises:
a magnet generating a stable basic magnetic field;
gradient coils that generate gradient fields;
a transmitting coil assembly for transmitting radio frequency signals; and
a receive coil assembly for receiving radio frequency signals, which is a receive coil assembly as claimed in any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610989759.6A CN106371045B (en) | 2016-11-10 | 2016-11-10 | Interventional magnetic resonance receiving coil assembly and magnetic resonance equipment |
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| CN201610989759.6A CN106371045B (en) | 2016-11-10 | 2016-11-10 | Interventional magnetic resonance receiving coil assembly and magnetic resonance equipment |
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| CN106371045B true CN106371045B (en) | 2024-03-26 |
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| CN109521381B (en) * | 2017-09-19 | 2021-12-31 | 西门子(深圳)磁共振有限公司 | Base assembly of radio frequency coil, radio frequency coil assembly and magnetic resonance imaging system |
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| CN106371045A (en) | 2017-02-01 |
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