KR102467311B1 - Continuous anesthesia tool of magnetic resonance imaging device for deep brain structure of animals - Google Patents

Abstract

The present invention relates to a continuous anesthesia device having a resonance circuit for magnetic resonance imaging of deep brain structures of animals, comprising: a hollow tube (110); A frame 120 having a quadrangular closed loop shape provided on a plane perpendicular to the axial direction (C) of the tube at the front end of the tube 110; a first fixing bracket 130 having a closed loop shape extending from the frame 120 in the axial direction C of the tube 110; a second fixing bracket (140) having a closed loop shape extending from the frame (120) in the axial direction (C) of the tube (110) and spaced apart from the first fixing bracket (130); A wireless resonator 150 provided on at least one of the first fixing bracket 130 and the second fixing bracket 140 is included.

Description

Continuous anesthesia tool of magnetic resonance imaging device for deep brain structure of animals

The present invention relates to a continuous anesthesia device for a magnetic resonance imaging device, and more particularly, to a continuous anesthesia device having a resonance circuit for magnetic resonance imaging of deep brain structures of animals.

Magnetic resonance imaging is a typical diagnostic imaging technique, and currently refers to a technique that provides images to patients for the purpose of various convergence diagnosis and treatment. Magnetic resonance imaging provides pathological images that identify anatomical and metabolic phenomena that provide physical image contrast, which determines T1-weighted images and T2-weighted images. In addition, these images basically use the principle of nuclear magnetic resonance. In this technique, when a radio frequency is generated after placing the whole body or part of a human/animal in a magnetic resonance image [MRI] system that generates a magnetic field, the hydrogen nuclei of the part to be imaged resonate. It is possible to provide 1D spectroscopy, 2D imaging, and 3D imaging by reconstructing the acquired k-space data by measuring differences in signals / frequencies / phenomena / gradients that occur at this time. In the case of a recently developed magnetic resonance imaging system, research is being conducted to capture 4D motion images through a small system. Magnetic resonance equipment with low magnetic field (less than 3T), high magnetic field (more than 3T), and ultra-high magnetic field (more than 7 T) generally uses transmission and reception coils made up of several loop channels, all of which are different in size, , The number of coils may be increased, or the size of the coils may be changed according to an image acquisition method and an image acquisition region. A so-called volume coil is used to acquire a whole body image, and a surface coil is used to increase an image of a small area and a signal-to-noise ratio.

Theoretically, in order to increase the signal to noise ratio, multi-channel coils are developed and used by increasing the number of small loop coils, and various image methods are being developed to acquire images of the deep part of the region of interest. Currently, a magnetic resonance imaging system of ultra-high magnetic field is being developed to acquire human/animal high-resolution and super-resolution images, and it has been approved for clinical use and is being used in several countries. As a result, high resolution can be obtained with a very good signal-to-noise ratio in ultra-high magnetic fields such as 7T, 9.4T, 11.74T, and 21T. In addition, as the strength of the magnetic field increases, increased spin net magnetization of the acquisition area can be obtained, thereby shortening the imaging time and being very useful for obtaining local area images.

In a conventional magnetic resonance imaging system, a method of obtaining a magnetic resonance image signal with a body coil or a surface coil using a single cable or multiple cables is used. The size of the coil is consistent with equipment companies providing commercialized coils. These coils operate at a distance of approximately 10 to 20 cm from the subject, and the coil of the animal magnetic resonance equipment operates at a distance of approximately 1 to 3 cm. There is a disadvantage in that a signal cannot be obtained up to the region of interest due to an air layer between the air and the subject. It can be seen that a signal can be obtained in inverse proportion to the distance. In order to obtain a signal of the deep depth of a human or animal, a technology capable of resonating in the deep part is required. On the other hand, if the signal is not received, the region of interest in the acquired magnetic resonance image not only appears black, but also induces various artifacts, which can significantly degrade image quality. Therefore, it is necessary to develop a wireless resonance device that can be attached or inserted into the deep body, or a wireless resonance device that has excellent durability and can be freely changed in size, shape, and location. It is also required to develop a system to which a wireless resonator can be applied.

Publication No. 10-2018-0023226 (published date: 2018.03.07.)

An object of the present invention relates to a wireless resonator that can be attached to or detached from the most important coil of a magnetic resonance imaging system, and to provide a wireless resonator for maximizing the influence of acquiring a signal on a coil.

In particular, a continuous anesthesia device for magnetic resonance imaging that is fused with a continuous anesthesia device and inserted into the oral cavity of an animal and placed closest to the surface/skin of the lower part of the brain and the upper part of the brain to reduce artefacts and improve signal-to-noise ratio and resolution. is to provide

A continuous anesthesia device of a magnetic resonance imaging apparatus according to the present invention for achieving this object includes a hollow tube; a frame having a quadrangular closed loop shape provided on a plane perpendicular to the axial direction (C) of the tube at the front end of the tube; a first fixing bracket having a closed loop shape extending from the frame in an axial direction (C) of the tube; a second fixing bracket having a closed loop shape extending from the frame in the axial direction (C) of the tube and spaced apart from the first fixing bracket; and a wireless resonator provided on at least one of the first fixing bracket and the second fixing bracket.

Preferably, the wireless resonator includes a single loop coil and a resonant capacitor connected to the single loop coil.

More preferably, the first fixing bracket and the second fixing bracket are longer than the diameter of the single loop coil.

More preferably, a fixing groove into which the wireless resonator is inserted is formed on inner surfaces of the first fixing bracket and the second fixing bracket.

More preferably, each tip of the first fixing bracket and the second fixing bracket has a curved surface having the same curvature as that of the single loop coil.

The continuous anesthesia device of the magnetic resonance imaging apparatus according to the present invention includes a hollow tube inserted into the oral cavity of an animal and used for inhalation anesthetic injection, a frame provided at the tip of the tube, and a closed loop extending parallel to the frame. A pair of fixed brackets having a shape and a wireless resonator provided on any one of the pair of fixing brackets, including a wireless resonator, and high-quality images of various regions of the deep brain can be obtained by changing the size and position of the wireless resonator. There are effects that can be obtained. In addition, the present invention can contribute to the discovery and identification of causes of brain diseases, rapid diagnosis and treatment efficiency.

1 is a perspective configuration diagram of a continuous anesthesia device of a magnetic resonance imaging apparatus according to an embodiment of the present invention;
2 is a plan configuration diagram of a main part of a continuous anesthesia device of a magnetic resonance imaging apparatus according to an embodiment of the present invention;
3 is a circuit diagram of a wireless resonance unit of a continuous anesthesia device of a magnetic resonance imaging apparatus according to an embodiment of the present invention.

Specific structural or functional descriptions presented in the embodiments of the present invention are merely exemplified for the purpose of explaining embodiments according to the concept of the present invention, and embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described in this specification, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective configuration diagram of a continuous anesthesia device of a magnetic resonance imaging device according to an embodiment of the present invention, and FIG. 2 is a plan view of a main part of a continuous anesthesia device of a magnetic resonance imaging device according to an embodiment of the present invention. 3 is a circuit diagram of a wireless resonance unit of a continuous anesthesia device of a magnetic resonance imaging apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 and 2 , the continuous anesthesia device (hereinafter, also abbreviated as “instrument”) 100 of the magnetic resonance imaging apparatus according to the present embodiment includes a hollow tube 110 and a front end of the tube 110. A frame 120 having a quadrangular closed loop shape, a pair of first fixing brackets 130 and a second fixing bracket 140 having a closed loop shape extending from the frame 120, and a first fixing bracket A wireless resonator 150 provided on either one of the bracket 130 and the second fixing bracket 140 is included.

The tube 110 is inserted into the oral cavity of the animal and used to inject an inhalational anesthetic to perform anesthesia.

The frame 120 has a square closed loop shape provided at the front end of the tube 110 on a plane perpendicular to the axial direction (C) of the tube.

The first fixing bracket 130 has a closed loop shape extending from the frame 120 in the axial direction C of the tube 110, and the wireless resonator 150 may be fixed thereto. Preferably, the front end of the first fixing bracket 130 has a curved surface having the same curvature as that of the wireless resonator 150 .

Preferably, a fixing groove 131 is formed along the inner surface of the first fixing bracket 130, and the wireless resonator 150 is inserted into the fixing groove 131 to fix the wireless resonator 150. .

The second fixing bracket 140 has the same structure as the first fixing bracket 130 and is spaced parallel to the first fixing bracket 130 and extends from the frame 120 . A fixing groove 141 for fixing the wireless resonator 150 is formed along the inner surface of the second fixing bracket 140 .

The wireless resonator 150 is provided on at least one of the first fixing bracket 130 and the second fixing bracket 140, and in FIG. 1, both the first fixing bracket 130 and the second fixing bracket 140 It shows that the wireless resonator is provided.

The tube 110, the frame 120, the first fixing bracket 130, and the second fixing bracket 140 may be provided by the same integral material, and a non-magnetic material that does not affect the magnetic resonance image is used. do.

The wireless resonator 150 includes a single loop coil 151 and a component 152 connected to the single loop coil 151 for tuning to a resonant frequency of the magnetic resonance imaging apparatus.

Referring to FIG. 3 , the wireless resonator 150 includes a resonant capacitor 152a connected to a single loop coil 151 as a component 152, while a single or cross diode 152b is a component 152 ) can be added. In addition, a plurality of capacitors, diodes, or inductors may be added for tuning to the resonant frequency of the magnetic resonance imaging apparatus.

The single loop coil 151 may be provided by a conductive material such as copper, an alloy of silver and copper, or copper wire, and may have a solid or flexible form. The component 152 may be composed of a PCB and connected to the single loop coil 151 .

In particular, referring to FIG. 2 , the total length (L) of the second fixing bracket 140 is greater than the diameter (2r) of the single loop coil 151 (2r < L), so the wireless resonator 150 Horizontal movement of the position is possible from the inside of the fixing bracket 140.

The apparatus of the present embodiment configured as described above is inserted into the oral cavity of an animal and combines the wireless resonator 150 fixed to the first fixing bracket 130 and/or the fixing bracket 140, or two parallel wireless resonators. (150), the quality of magnetic resonance imaging of the deep brain and oral cavity can be improved.

For example, in the device of this embodiment, the wireless resonator 150 fixed to the first fixing bracket 130 can improve the image quality of the oral cavity in the lower part of the brain, while the second fixing bracket 140 The fixed wireless resonator 150 may be located close to the surface/skin of the upper part of the brain to improve the image quality of the corresponding part. In addition, since the wireless resonator 150 can move horizontally in each of the fixing brackets 130 and 140, it is possible to obtain high-quality images of various regions deep in the brain, including the inside of the oral cavity.

The present invention described above is not limited by the foregoing embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible within a range that does not deviate from the technical spirit of the present invention. will be clear to those who have knowledge of

110: tube 120: frame
130: first fixing bracket 140: second fixing bracket
150: wireless resonance unit

Claims (5)

a hollow tube that can be inserted into the oral cavity of the animal and used for inhalational anesthetic injection;
a frame having a quadrangular closed loop shape integrally provided on a plane perpendicular to the axial direction (C) of the tube at the front end of the tube;
a first fixing bracket having a closed loop shape extending from the frame in an axial direction (C) of the tube;
a second fixing bracket having a closed loop shape extending from the frame in the axial direction (C) of the tube and spaced apart from the first fixing bracket;
A continuous anesthesia device of a magnetic resonance imaging apparatus including a wireless resonator provided on at least one of the first fixing bracket and the second fixing bracket. The continuous anesthesia device of claim 1, wherein the wireless resonator includes a single loop coil and a resonance capacitor connected to the single loop coil. The continuous anesthesia device of claim 2, wherein the first and second fixing brackets are longer than the diameter of the single loop coil. The continuous anesthesia device of claim 3, wherein the first fixing bracket and the second fixing bracket have fixing grooves formed on inner surfaces into which the wireless resonator is inserted. [Claim 5] The continuous anesthesia device of claim 4, wherein the front ends of the first fixing bracket and the second fixing bracket have a curved surface having the same curvature as that of the single loop coil.

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