TW439323B - C-type magnet and in-built receiving antenna of magnetic resonance system - Google Patents

Abstract

The present invention relates to a C-type magnet and an in-built receiving antenna of a magnetic resonance system, wherein the magnet utilizes the C-type magnet to have a particular arrangement in space to generate a horizontal magnetic field, so that the manufacturing cost is reduced and the patient feels convenient and comfortable in using the system. The receiving antenna is an in-built receiving antenna which utilizes a FERB technique to reach into the organs of the patient even the path is curved and deep and the performance for detecting local images can be enhanced. The dimension and shape of the receiving antenna can match the inner shape of the organ to avoid an uncomfortable feeling in detecting a patient. The structure of the receiving antenna can be used to form a hard rod structure.

Description

4 3 93 23 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (/) The invention relates to a C-type magnet and a built-in receiving antenna of a magnetic resonance system, especially a low-cost horizontal magnetic field. High-efficiency c-type magnet and a h-shaped in-out antenna that can extend into the human body S to enhance image quality and prevent patients from feeling uncomfortable. The working principle and existing technology of the magnetic resonance imaging (MR or MRI) system are as follows, first in the working principle part: In the magnetic resonance imaging system, the protons in water or tissues will be aligned by their nuclear magnetic moment 'Precession around a main magnetic field B »with a precession frequency t called Larmor resonance' where ff〇 = TB〇; magnetic rotation rate, or fQ = (r / 2 ^) B〇: if T represents 1 MHz / TesIa, then fe = rB〇, you only need to apply another magnetic field Bl (also shown in the first figure) that rotates at the same Larmor precession frequency and is perpendicular to the direction of the main ββ magnetic field. Input energy, which is absorbed by the protons in the precession, so that the protons transition from a denser lower energy state to a higher energy state. 'The B1 magnetic field is also referred to as the radio frequency (rf) magnetic field, and is the angle deflected by the magnetic field B1. 0 is -0 = B1 t, where t is the time when the magnetic field B1 is turned on, and a radio frequency pulse signal is provided when the magnetic field B1 is turned on. In imaging technology, a 90-degree or 180-degree pulse signal is often used. The magnetic field is on and off. When it is on, the magnetic field B1 is a magnetic field that can absorb energy. When the magnetic field B1 is cut off, the excited protons will tend to decay and return to the original low energy state. The attenuation of their nuclear signal strength can be an RF receiving coil (or an antenna) that has the best right angle to the main magnetic field B0. Measured. '' About the current status of the aforementioned RF receiving coils The built-in RF coils used in magnetic resonance imaging systems have not yet entered ^ The paper size applies the Chinese National Standard (CNS) A4 specification <21〇x 297 mm --- IJI--Γ Ί I — ^ Ii- ----- --- Order 1 /. ./ · (Please read the notes on the back before filling this page) A7

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of Invention (I) Mature period. At present, a type of built-in coil, called Madrad endoscope thyroid detection coil (see Figure 5), has been sold in the market. It is mainly provided with an inflatable balloon part at one end of the rod body. Carry a radio frequency coil. When the balloon is inflated, the radio frequency coil that extends into the patient's body will face the thyroid area and press against its tissue wall. Because it is in a tight state, it can enhance the image quality of the area. As for the tuning and matching of the coil, it is performed in vitro by an automatic device. The above-mentioned Medrad coil is a disposable structure. Although there is no problem of indirect infection, it is connected to a rigid rod body, so it can only be applied. In organs such as the rectum, there are several other types of built-in coils that belong to the rigid rod type. As shown in the sixth figure, the cervical loop coil has two planar coils connected in series or in parallel as coil units. The planar coil can be regarded as Saddle coil flattened half. As shown in the seventh figure, 'a cylindrical coil for inspecting the anus is formed by two half-shaped saddle-shaped coils surrounding a cylindrical object, and as shown in the eighth figure,' it is a thyroid coil, which It is mainly cylindrical with a flat surface formed on one side. The thyroid coil can be mounted on the plane with a single rectangular planar coil, or the leading edges of the two rectangular coils can overlap by an area of about 0.3% to increase the composite flux through the total volume of the module. Compared with a single large coil of the same total area, this composite component improves the signal-to-noise ratio by about 75 times (see "The MNR Phased Array PUoemer et al., Magnetic Resonace in Medicine 16 '192-225 (1990)). And the aforementioned hard-pole coil adopts a similarity to the current ultrasonic detector. 4 paper sizes are in accordance with China National Standard (CNS) A4 specifications (0 X 297). -------- f _--- ^- ------- ^ --------- line (please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs &quot; A7 B7 V. Description of Invention (_j ). The loop coil shown in Figure 6 is mainly used for cervical imaging. The anal coil shown in Figure 7 is used for the sphincter (this coil can also be used for the urethra if it is reduced in size), and as shown in Figure 8 The sacral coil shown in the figure is used for the thyroid area; the three types of coils mentioned above It has been used in health care research and has achieved some significant results. Similar to ultrasonic detectors, these hard rod coils are covered with a latex jacket when used (such as condoms), and the coil itself can be repeated after disinfection Use. As far as electronics are concerned, hard-rod coils have a constant coil unit inductance, so the two electronic characteristics settings related to tuning and matching can be preset by the components carried on the circuit board of the rod-shaped object. However, the aforementioned three types of coils are limited in their application. They can only be used in areas with shallow body holes, such as near the entrance of rectal body holes, without being inserted too deep, or can only be inserted. In vaginal straight muscle body tracts, for the internal organ body tracts that have been iced in, the aforementioned three types of coils cannot be applied due to their rigid rod structure. There are two main types of magnets in the magnetic resonance system. The main magnetic field B There are three different directions. The first type is a solenoid-type magnet (as shown in the second figure). Its main magnetic field is located in the horizontal direction and follows the axis of the spiral winding. Electromagnetic exciters and superconducting exciters using this technology have been introduced, which respectively cover magnetic fields from as low as 1¾. The first type is a C-type magnet or horseshoe-shaped magnet with a vertical main magnetic field (as shown in the third figure) (Shown), these permanent magnets or electrics with geometric shapes 5 paper sizes are applicable to China National Standard (CNS) A4 (210 X 297 cm) ill li I — --- ^ ------- order --- II I--line J · {Jing first read the notes on the back before filling in this page> A7 V. Description of the invention (/) Magnets can be purchased on the market 'mainly to cover less than 0,5 Tesla Low-pass f magnetic field range. The magnetic resonance system using this C plastic magnet is relatively large (please read the precautions on the back before filling out this page). It is easy for patients to enter and exit. As for the third direction of the main magnetic field &amp;

The main reason for this type of magnet is that ^ A ^ 7 C-type magnet's opening is upward (as shown in the fourth figure), and horizontal magnetic field is generated between the two horizontally opposite magnetic poles. , And usually scan on its back with the supine position 'so for some radio frequency (such as flat, saddle, or solenoid coil) RF receiving coils' horizontal magnetic field B of the c-type magnet. It will be more effective. The three magnet systems mentioned above can be further summarized as shown in Figure 24. The direction of the main magnetic field shown in the figure can be represented by the three axes of the Cartesian coordinate system β, but in the existing magnetic field In the resonance system, most of them use solenoid-type magnets (as shown in the second figure). The advantage is that it can generate a magnetic field with uniform strength and high magnetic induction intensity. When using superconducting excitation line 圏, it can reach 2 Tes I a is above, but still has the following disadvantages: (a) The patient is in a deep cabin, and it is easy to feel claustrophobic. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs (b) Patients are more difficult to enter and exit, which means that life support systems (such as drip injections) are not easy to follow the patient into the rest. (c) Since the magnet is the core part of the magnetic resonance system and a high-priced component in the magnetic resonance system, compared to the C-type magnet, the manufacturing cost of the solenoid-type magnet is very heavy. At present, C-type private paper with vertical magnetic field is also available on the market. The standard of Chinese paper (CNS) A4 (210 X 297 mm) is applicable. 43 93 23

V. Description of the invention (factory) The printed magnetic resonance system (shown in the third picture) of the printed magnetic resonance system of the employees ’cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, because it improves the convenience for patients to enter and exit, reduces the claustrophobic fear, Lower manufacturing costs will help reduce the cost of the entire magnetic resonance system. However, there are still many shortcomings in existing magnetic resonance systems using c-type magnets: (a) The body is bulky and bulky, and it still does not save patients from fear That is, the upper magnetic pole of the C-type magnet is close to the chest of the patient, and it is easy for the patient to have a fear of being hit on the body. (b) Because the magnetic pole is close to the patient's chest, the space available for the life support system remains limited. (c) The radio frequency magnetic field Bi of the saddle (body) coil η (as shown in Figure 25) or the planar coil J (as shown in Figure 26) is parallel to the vertical main magnetic field B0, It will not be able to receive magnetic resonance signals. In addition, the saddle-shaped coils of the body and head used in the existing spiral tube magnetic resonance system can not be used in this system, so the built-in antenna (RF coil) is relatively limited. Applicable types and will reduce their effectiveness. (d) The gravity of the magnetic pole acting on the patient, coupled with the existing attraction between the two poles, will cause additional mechanical stress and changes on the return arm of the C-type magnet. This phenomenon will prevent the further enhancement of the magnetic intensity. Not conducive to improving image quality (ie, signal-to-noise ratio) and its application in magnetic resonance spectroscopy. Moreover, the excitation of the gradient coil will cause it to vibrate. If it is synchronized with the characteristic frequency of the C-arm (that is, the tuning fork phenomenon), it will cause a slight deterioration of the image and the collapse of the mechanical structure, which seriously endangers the safety of the patient. 7 This paper is fully compliant with China National Standard (CNS) A4 (210 x 297 mm) (Please read the precautions on the back before filling this page) ·-4 3 93 2 3

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs From the above, it can be seen that the selection of c-type magnets for the magnetic resonance system will help to greatly reduce costs and reduce patient fear, but it still has the forefront disadvantages. From the above analysis, it can be understood that the existing magnetic resonance system still has shortcomings in both external and internal antennas and the use of magnets. It still needs further review and a solution is sought. Therefore, the main object of the present invention is to provide a flexible built-in antenna that can enhance the image quality and penetrate into the body and organs of a human body without causing patient discomfort. The main technical means adopted to achieve the aforementioned purpose is to make the built-in antenna at least include a catheter assembly and a coil unit provided at one end of the catheter assembly; wherein: the catheter assembly is composed of multiple inner and outer tube sleeves and is flexible. The coil unit is in the form of a flexible stretchable balloon (FERB, Flexible 'Expandable &amp; Retractable Balloon)' which can penetrate the inside of the organ's body through the catheter assembly to reach the correct location, and then expand the coil unit to abut against On the tissue wall to obtain an image β, the aforementioned catheter assembly includes at least:-a flexible hollow catheter located at the innermost part and connected to an air pump; a set of inner tubes provided outside the hollow catheter and provided with the aforementioned coil unit at one end; An outer tube that is sleeved outside the inner tube; wherein: the coil unit is normally covered by an outer tube, and when the coil unit extends into the patient's body to be measured, the outer tube is pulled out to expose the coil unit to the tissue. Then, it is inflated and then expanded to "make the coil unit abut against the tissue wall of the site to be measured" in order to obtain a desired quality image.

S Applicable to this paper size + National Standard (CNS) A4 now (210 X 297 mm) ------- Order -------- • Line (Please read the precautions on the back first (Fill in this page) 43 93 23 A7 B7 Description of the invention (7 The second purpose of the present invention is to trace the plate _ a., To transform a C-cut # iron with a horizontal magnetic field to effectively overcome the aforementioned problems. We magnetic to achieve the aforementioned The technical means adopted for the purpose is to put the aforementioned in a concave box, and form a magnetic field λ in the horizontal direction between the long grooves in the central P1 gap m Si Wu VII and Kaidi of the present body, the c-type magnetic field. "Magnet control unit" The negative C-type magnet includes at least: magnetic pole surface; active / passive shims on the outside of the magnetic pole surface; gradient coils on the outside of the active / passive shims; exciter on the inside of the magnetic pole surface; The return path of the iron core opposite to the two exciters. The described magnetic pole surface is a laminated magnetic pole surface, which is used to correct the magnetic field uniformity or strength for the second time. The interstitial sheet is composed of a plurality of overlapping sheets, and the sheet system is composed of The ferromagnetic sheet is made of strip and electric steel sheet. The long slot space of the box body is provided with active / passive shims to correct the asymmetry of the C-shaped core arm. The aforementioned control unit includes a central control A radio frequency transmitter 'is connected to the aforementioned central controller for selectively applying radio frequency signals to the transmitting coil at the patient to excite the magnetic resonance of the protons in the magnetic field; (please read the precautions on the back first to fill out this Page} 装 ----! | Order ---!-Line. Printed by Intellectual Property Bureau of the Ministry of Economic Affairs X Consumer Cooperative

4 3 93 &gt; V. Description of the invention (") A gradient% control benefit is connected to the central controller and is provided to the gradient magnetic field coil at the patient to produce a magnetic field between the two magnetic poles in order to measure the magnetic resonance signal. Decoding;-Signal connection m as an antenna to receive magnetic resonance signals from the detection site; ...-Image processor (or image reduction device) for complete inverse fast Fourier transform to restore the received magnetic resonance The image represented by the signal; an S-memory body is used to store the image data processed by the image processor; a display 'is used to display the image data processed by the image processor. In order to make your reviewing committee better understand the foregoing objectives and the technical features of the present invention, a detailed description is attached as follows: (1) Schematic part: Figure. This is a magnetic field vector diagram of magnetic resonance. The second figure is a schematic diagram of the structure and magnetic field direction of a known spiral tube magnet. The second figure is a schematic diagram of the C-type magnet structure and magnetic field direction of a known vertical magnetic field. The fourth figure: a C-type magnet structure and magnetic field direction diagram of a horizontal magnetic field. Fifth figure: It is a schematic diagram of the structure of a conventional rigid rod balloon receiving coil. Fig. 6 is a schematic diagram showing the structure of a conventional hard-rod type cervical receiving coil. Figure 7: Schematic diagram of the structure of a conventional hard-rod anal receiving coil. 10 This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) ----- 1 7 --- &quot; τ -: — {Please read and read the notes on the back #; 4; write this page) -SJ- --line. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed A7 B7 V. Description of the invention (7) 〇 Figure 8: a schematic diagram of a conventional hard-rod type thyroid receiving coil. The ninth circle is a schematic diagram of the structure of the flexible built-in antenna of the present invention. Fig. 10 is a partial structure view of one of the built-in antennas of the present invention. Fig. 11: Schematic cross-section and action diagram of another partial structure of the built-in antenna of the present invention "Fig. 12: Schematic cross-section and action diagram of another partial structure of the built-in antenna of the present invention. Fig. 13 is a schematic cross-sectional view and action diagram of another partial structure of the built-in antenna of the present invention. Fig. 14 is a schematic diagram of the structure of a sausage-shaped radio frequency coil in the built-in antenna of the present invention. Figure 15: Schematic diagram of the structure of a single-winding RF coil in the built-in antenna of the present invention. Fig. 16 is a structural diagram of a string of sausage-shaped radio frequency coils in the built-in antenna of the present invention. Fig. 17 is a schematic diagram of the structure of a dual-winding RF coil in the built-in antenna of the present invention. Β Fig. 18 is a schematic diagram of the structure of a multi-winding RF coil in the built-in antenna of the present invention. Figure 19 is a schematic diagram of the structure of another multi-winding RF coil in the built-in antenna of the present invention. Figures 20A to D: The hard-pole embodiment of the built-in antenna of the present invention. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm). (Write this page) Previous 0 5th Printed by the Consumer Property Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7, Invention Description (, ...) Schematic diagram 1> Figure 21: Tuning and matching circuit circuit matching the built-in antenna of the invention Illustration. Fig. 22 is a circuit diagram of a preamplifier connected to the aforementioned tuning and matching circuit. Fig. 23 is a circuit diagram of a preferred embodiment of a preamplifier. Figure 24: Vector diagrams of magnetic fields in three directions. Figure 15: Schematic diagram of the saddle type RF coil in use. Figure 26: Schematic diagram of the state of use of a planar RF coil. Figure 27: Schematic diagram of the structure of a box containing c-type magnets according to the invention. Figure 8: Schematic diagram of the structure of another box containing C-type magnets according to the invention. Refer to the overall structure and use status. Figure 30: The top view and reference diagram of the c-type magnet of the present invention. (II) Drawing number part: (Please read the precautions on the back before filling this page)-Install! An order ----- ^ ---- line (100) built-in antenna (1011) intake valve (1 0 3) coil unit (1 0 5) inner tube (1 07) copper line strip (1 0 9) Dome cover (1 1 1) outer tube (1 0 1) hollow tube (1 0 2) wire (1 0 4) balloon end (1 0 6) radio frequency coil (1 0 8) strip (110) into Trachea (1 1 2) Latex sleeve 12 This paper size is applicable to the national standard (CNS) A4 specification (210 X 297 mm) 43 93 23 V. &Exp; (113) Sensor (1 1 5) Sealing element (1 1 7) (1 1 9) Capacitor (1 2 0) Common arm (1 2 2) Fixing ring (131) Half-shell part (2 0) Box body (21) Long groove (114) Light emitting diode Body (116) ring segment (1 1 8) top ring (1 2 1) tuning matching circuit (1 3 0) waterproof seal (1 4 0) power supply (2 0 1) support arm (211) magnetic pole surface ( 21A) ~ (21C) Slot wall (213) Gradient magnetic field line (2 1 2) Active / passive gap filler (2 workers 4) Patients (Please read the precautions on the back first # Fill this page) Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the employee consumer cooperative (2 1 5) Exciter (2 1 7) Iron Furious return path (2 1 9) Hospital bed (2 2 1) Transmit coil (2 2 3) Barrier (3 0 0) Central controller (3 0 4) Signal receiver (3 0 6) Image processor (3 0 8) Display (216) Interstitial sheet (218) Interstitial sheet (2 2 0) Life support system (2 2 2) Receiving coil (2 2 5 ) Mobile gate (301) RF transmitter (305) Gradient field controller (307) Memory (4.0) Pre-amplifier Firstly, the invention proposes a built-in RF receiving coil (or antenna) 'It can be called an internal antenna (1 0 0) in the form of a flexible stretched balloon (F ERB)' For its structure, please refer to the ninth figure, which is inserted into the human body. 'It can be used for magnetic resonance imaging technology. Details The structure is detailed as follows: Inner 13 This paper size is applicable to Chinese National Standards &lt; CNS) A4 (210 X 297 mm) 43 93 2 3 A7 V. Description of the invention 2) It includes: Hollow tube (101); a set of inner tube (105) outside the hollow tube (101);-coil unit (103) at one end of the inner tube (105)-facing through The outer tube (ill) placed outside the hollow catheter (101) and the lead wire (10 set on the inner tube 05); among them, the employee of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the Consumer Cooperative The hollow guide (1Q1) can be inserted into the wire (102) and connected to the coil unit (103) at one end thereof; and the hollow catheter (1Q1) is made of latex, which is opposite to the installation of the coil unit (10). 3) A bifurcated pipe is formed on the other end, and the bifurcated pipe is provided with an air intake valve and an air intake valve (1001) for air input. In this embodiment, 'the air intake valve (1010 1 ) Is a Schraider valve, which is the same as that used in ordinary automobiles. It can be closed by using the internal pressure formed by filling the air; and it is pumped by the air pump to pass through the air inlet valve (1001 1). To inflate. An air inlet pipe (1 1 0) is connected to the other end of the hollow pipe (1 〇1) relative to the air inlet valve (1 0 1 1) (see the twelfth figure) 'The air inlet pipe (1 1 〇) Air holes are formed at appropriate positions to convey air. The coil unit (103) includes at least a radio frequency coil (106) provided at the end of the inner tube (105) and a balloon end provided at the same end of the inner camp (105) and located outside the radio frequency coil (106). (104) 14 This paper size applies to the Chinese national standard (CNS &gt; A4 size (210 X 297 mm) (Please read the precautions on the back before filling this page)) 1 丨 丨 -line · 43 33 23 A7 B7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, the Consumer Cooperatives, printed the standard for the application of the Zhongguanjia Standard (CNS) A4 specifications. The balloon end (104) is actually the second layer of the aforementioned catheter assembly, which is mainly located at one end of the inner tube (105) and is located outside the aforementioned air inlet tube (110), which can pass through the aforementioned air intake The valve (1 0 1 1) is inflated by air sent from the hollow duct (1 0 1) and the air inlet pipe (1 10). The inner tube (1 0 5) is made of flexible PVC (or any other suitable plastic material) ) Constitute 'It has an inner diameter slightly larger than the outer diameter of the hollow tube (101) so as to be sheathed outside the hollow tube (101); The inner tube (105) described earlier—a closed-end RF coil (106) is provided at the end (as shown in Figures 10 to 12), and the RF coil (106) is composed of a number of copper circuit strips (107), the copper circuit strip (107) is formed by depositing a steel circuit with a thickness of 50-105 mm on a polyester resin film having a thickness of 50-70 mm. It is also composed of each copper circuit strip ( 107) The radio frequency coil (106) is formed and is further constrained by adjacent or staggered strips (108) to form a certain shape, and the strip (1 ◦ 8) is made of polyester resin film or other Made of flexible plastic material (as shown in Figure 12). The other end of the copper circuit strip (107) and the restraint strip (108) are combined by a fixing ring (i 2 2). At the tip of the air inlet pipe (Gonggong 0), the fixing ring (1 22) can be made of deirin or plastic material. On the fixing ring (丄 2 2), components such as capacitors can be placed, and through the aforementioned pair The lead wire (102) passes through the air inlet pipe (11) and the hollow tube (101) and is connected to the external tuning and matching circuit. 15 Please read the back first <Caution Xiang Zai% writes this tribute) V one I -------- ^ 3 93 23

V. Description of the Invention (# 接) In addition, the aforementioned outer tube (1 1 i) is sheathed at the 7 end provided with a radio frequency coil (Work 0 6)-a latex sleeve (112) (ie a condom condom). It covers the entire RF coil assembly. In addition, a dome cover (工 〇9) is provided at the coil unit (丄 〇3) formed by the tip of the aforementioned air inlet pipe (1 i 〇) and the aforementioned RF coil (106). 'By fixing the RF coil (i 〇6), the outer diameter of the dome cover (109) is slightly larger than the inner diameter of the outer tube (ii 丄), which can prevent it from being excessively pulled into the outer tube (1 1 1), The dome cover (1 09) can be made of delrin or other plastic materials. A sensor Is (113) is provided between the outer tube (iii) and the latex sleeve (tool 2) (as shown in Figure 12). The sensor (丄 1 3) can be connected to a light emitting diode (1 1 4) provided externally to monitor the expansion status of the balloon end (104). The aforementioned latex sleeve (tool 2) is further fixed At the appropriate position of the outer tube (111), it is tightened to the outer tube (111) by a sealing element (115) (such as a O-ring) to make it watertight. All components are strictly controlled and must not be made magnetic. Based on the structural characteristics of the built-in antenna (100) just described, it can be called a balloon / RF coil type insert. As for its in-body The entire operation condition can be explained by the ninth to thirteenth drawings: When the built-in RF receiving coil (100) is inserted into the patient's body with one end of a hollow tube (10 1) provided with a coil unit (103), and the 16 (Please read the precautions on the back #Fill this page first) Packing ---------- Order! * Thread "Printed by the Consumers' Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs This paper is printed in accordance with Chinese National Standard (CNS) A4 Specification (210 X 297 mm> 4 3 93 2 3 A7 B7 V. Description of the invention (ΛΓ) The coil single 7G (1 C) 3) After the correct position is reached (as shown in the tenth figure), you can hold the inner tube (1 0 5) and draw the outer tube (1 1 i) outward to expose the radio frequency coil (work 0 6) constituting the coil unit (1 0 3) (as shown in the eleventh figure). At this time, use The air pump is inflated through the air inlet valve at the end of the hollow pipe (101), so that the inner end of the inner tube jl05) is chaotic. 4) Inflated until the sensor (113) is activated by the balloon end (1, the internal pressure between the wall surface and the tissue wall of the body is activated, and then the inflation is stopped, and the sensor (ii.丄 i 4) judge whether it is lit or not. Then, the magnetic resonance system can start to take images. After the images are taken, the built-in antenna (100) is taken out in the opposite step, and the inner tube (101) ) Push back to the original position, the pumping process can be reversed by first operating the air valve (1Q1 1) to release the air inside the balloon end (104), and then holding the inner tube (1 〇1 ) And push the outer tube (1 work) back, until the outer tube (11) touches the dome cover (109) and stop 'At this time the entire coil assembly can be pulled out through the inner tube (105) and hollow Catheter C101) was withdrawn from the patient. Furthermore, the balloon end (104) at the end of the hollow catheter (101) can be of any shape or size. It may be spherical, cylindrical, rectangular, or elongated, or it may be a balloon end connected by several balloons together. And balloon ends of any shape and size fall into the technical field of the present invention. Among them, the size of the S-shaped balloon end can be large enough to fit in the stomach, or it can be small. The size of this paper wave is suitable for China National Standard (CNS) A4 specifications (210 X 297 mm -----, 1— ^ pack— (Please read the notes on the back before filling out this page)

.Line V Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 V. Description of invention (μ) to be put in the ear; or a long cylindrical shape, such as a sausage shaped b (as shown in Figures 14 and 15) (Shown), for use in the rectal area; or several segments connected together to form _, such as the balloon end c of a string of sausages, can be placed in the intestine (as shown in Figure 16); or a long rectangular balloon End D for prostate imaging (shown in Figure 17); or it can be a long rectangular compound shape balloon end E with a ring segment (1 i 6) at the distal end (as shown in Figure 18) The ring segment (li 6) through which the coil passes can catch the cervix to capture the cervix, the area / space above the cervix, and the surrounding area / space outside the vagina. f The coil printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs may consist of a single winding (as shown in Figures 14 and 16), or two half-shaped saddle coils (Figure 15). It can have two coils, where the optimal overlap area of the two coils is about 0.3% to give an optimal composite signal to noise ratio of about 75% (as shown in Figure 17). Multiple coils are formed and overlap each other (not shown in Figure 18) to provide the best signal-to-noise ratio for vaginal area / space imaging. Another design form of the balloon end F uses three coils with a common arm (work 20), each common arm (丄 20) is arranged at an equal angle of work 20 ° (as shown in Figure 19) (Shown), this design form is easier to manufacture 'and can be adjusted repeatedly by the capacitor (117) provided on the top ring (118) and the capacitor (1 1 9) provided on the three common arms (1 20). And reach tuning. The signals from the aforementioned three-coil array can be obtained from both ends of the valley (1 1 7) so as to be output to an independent tuning and matching circuit (1 2 1). Using this three-coil array method, the signal-to-noise ratio gain is approximately 6 7%. This paper is fully compliant with China National Standard (CNS) A4 (21,297 mm) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 43 9323 A7 —— ------ B7 V. Description of Invention (7) I 'Because the vagina is relatively straight' and can expand in the diameter direction, the built-in antenna of the present invention can also be made into a rigid rod structure (as shown in Figure 18), and the coil windings suitable for hard objects can be Single loop coil, or dual coils that partially overlap to obtain the best MR signal, thereby 'the hard-rod design can also provide MR images of the vagina, the area / space above the vagina and the area / space around the vagina Get. In the shape of such a hard rod design, it can be matched with an outer hub G disclosed in Figure 20A to form a waterproof seal (130). The waterproof seal (13) is composed of two The half shells (1 3 1) are relatively combined to facilitate pulling apart for replacement. The feasible relative coupling structure can be as shown in Figures 20-B. The aforementioned waterproof seal (130) is a disposable structure, which helps to meet health and safety requirements. As for the aforementioned waterproof seal (I 1 3 0) design consisting of the two half shells (131), it can be applied to any shape and / or any hard-pole-shaped narrow neck position; and the same design form can also be used It is used in ultrasonic detectors to achieve the same purpose of local disposability, to avoid safety and health concerns. As for the foregoing one of the possible embodiments of the tuning and matching circuit and the decoupling circuit, the structure is shown in the twenty-first circle, where each component and its function are as follows: L «: is the aforementioned coil unit (103) ).

Ct 1: It is a local tuning capacitor, which can be placed on the fixed ring (1 22) at the tip of the coil unit (103).

Ct 2: It is a small variable capacitor that can be used for remote control. It can be set at 19 paper sizes. Applicable to China National Standard (CNS) A4 specifications (210 X 297 mm) III — —.---- ^- --J Pack -------- Order --------- Line '-V (Please read the notes on the back to fill in this page first) 4 ci 9α ^ 3 A7 Intellectual Property Bureau, Ministry of Economic Affairs Printed by employee consumer cooperative B7 V. Description of the invention (/ (f) The aforementioned conduit assembly is applied to the outer side of the pair of wires (102) and is connected in parallel with the capacitor cT 1. The modulation composed of the aforementioned two capacitors Ct 1 and Ct 2 The capacitors Ct are used to tune the resonance circuit of the coil unit. 1m: the length of the cable between the wire (102) from the coil unit (103) to the tuning and matching circuit outside the conduit assembly, and the attenuation in the cable segment h It should be kept to a minimum, such as RG 174 wire, the attenuation is 0.5 decibels / meter. Also for open wires, if h is kept at least less than λ / 4, the input impedance appears to be capacitive. C3: Series 1 is used for isolation Large capacitance of DC signal. D1: It is a diode. It can be switched on and off by positive and negative connection for light (or t). L1: It is added These stray inductances are the inductance of the decoupling circuit, which is equal to the inductance of the coil unit (103). Since Lm can vary from patient to patient, the aforementioned inductance is variable and can be remotely controlled. During the RF signal transmission, a reverse bias of _15V is added to make-a pole D1 conductive. "Since the two terminals are short-circuited, the light-emitting circuit l 1 generates high impedance at both ends of the tuning capacitor 0 (^ 1 + core 2). During the RF signal receiving mode, the + 15V across the diode D1 can turn off the diode Di to output a normal RF signal to a preamplifier (40), and then enter the receiver of the input system. Another inductor L2 The high-impedance parallel resonant circuit composed of capacitor C4, etc. is used to isolate the AC signal, and only allows the DC signal to pass. The parallel resonant circuit is further connected in parallel with a capacitor C5 and a capacitor C5 and a capacitor respectively. Capacitor cm composed of variable capacitor C6, two sets of capacitors

This paper size is applicable to the national standard (CNS) A4 specification (210 X ----- I .-- f: --- installed ------- ordered --------- ^ ΙΊ (Please read the precautions on the back to fill in this page first) 20 4 A7 ------------ V. Description of the invention (//) □ M series can provide a total capacitance to match The RF (ie DC) output 'makes the whole well-balanced. If the impedance at both ends of the spectrum-modulating capacitor & is higher than 50 ohms, the additional capacitor CM will form a capacitor voltage divider to divide the ㈣ capacitor from 0 to 2 The terminal impedance is reduced to the required 50 ohms for matching purposes. If it is less than 50 ohms at both ends of the tuning capacitor Ct, the use of a parallel resonant circuit will help boost it. A cable length of 12 will output The radio frequency signal is sent to the preamplifier (40) and the receiver. In the case of poor matching, it is best to keep the length of the section of the electric wire (or for the unit conversion) to minimize the attenuation, If the length of the λ / 2 relay is still too long, a circuit can be added to shorten the cable to provide a combined type; I / 2 effect. In some cases, it may be necessary to Inductor L3 and capacitor C7 are added to the wire of the mirror to isolate the AC signal for blocking the ground loop for RF signals. This also helps to improve the overall performance of the circuit. Furthermore, all the components used It must be strictly non-magnetic. When an RF coil enters the patient's body, the total load will occur due to both the inductive (or magnetic) load and the capacitive load. The total quality factor Q of the coil unit located in the patient's body is It will be affected by the load. Among them, only inductive load is good for imaging of MR signal. Capacitive load will cause the S frequency of the coil unit to be shifted. Since both inductive and capacitive load will cause the Q value of the circuit. Change, in order to optimize the performance of the coil, it must be fine set 'in order to match the coil unit with the tuning condition of the load in the patient's body. However,' it can be used where appropriate in the patient's body-a kind of simulation The shape of the physiological saline solution can be a water tank or a fish tank to simulate these loads. 21 This paper size applies to China National Standard (CNS) A4 (210 X 297 Gongchu) { Please read the notes on the back before filling out this page) *] nt— Order --------- Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employee ’s Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs: * .3 ^ 3: A7 -------------- 57 __ &quot; * &quot; *** ^ __ 5. Explanation of the invention (&) is to correct the resonance frequency of the offset and the body loading value For both, the first tuning and matching of the RF coil can be performed on a fictitious load in the laboratory, and the last second tuning and matching, sometimes even the first, can be performed in the patient. This will correct the variation of the inductance of the coil unit, and then tune the variation of the capacitance, in order to maintain the same resonance frequency and match the corresponding load condition. The body load will vary with different organs and patients. However, during actual imaging operations, an automatic tuning and matching system will help save time and increase efficiency. The design form of the aforementioned automatic tuning and matching system is not within the scope of the patent application of the present invention. As shown in Figure 22, the aforementioned preamplifier (40) and the reversible 1 5V DC power supply (1 40) used to cause the diode D1 to be turned on and off are shown. There is a low output in the figure. The impedance pre-amplifier (40) is used for 50 ohm signal source input, which can provide a good anti-spoofing function. 'There are several options for the design of the pre-amplifier (40).' For ease of explanation ' In the twenty-third figure, only one type of pre-amplifier suitable for 21MHz (0.5T) to 43MHz (1.0T) is disclosed. As stated in the background of the invention, the transmitting and receiving directions of Bι must be perpendicular to the main magnetic field Be (as shown in the first figure), and the best working condition is in place. When the two are not at right angles to each other, a cosine effect will occur. For the built-in antenna, the orthogonal vector with respect to the coil plane of the RF coil is the best vector. Therefore, for Medrad Endorectal prostate coils and hard rod coils of vaginal ring coils, these orthogonal vectors and their magnetic flux return paths are all located with the solenoid magnet system B. The vertical χγ plane 22 This paper size is applicable _ national standard (CNS &gt; A4 size (210 X 297 mm) Γ, Ϊ J installed -------- order i — * · &quot;! line J · (, Please read the note § on the back before filling this page) 4 A7 5. In the description of the invention (two /). When the built-in antenna of the present invention is used for organs of patients, such as in the stomach and the intestines 'It is still necessary to ensure that the signal is not attenuated excessively due to the cosine effect' Assuming that the magnetic pole gap is too large, if necessary, a C-type magnetic resonance system with a perpendicular magnetic field direction can be used to scan the patient again, and then turn the patient side to make it Form a certain angle with the C-type magnet, or let the patient lie on his back, and rotate the patient's recliner clockwise or counterclockwise around the axis of the main magnetic field Bo up to 90 degrees, and the best vector can be obtained. The above-mentioned combined scanning operation method is used in the magnet system, and various angles are used in the C-type magnet system, which can cover all three orthogonal directions of the main magnetic field B0 'and may also include the angles therebetween. This method will have Helps Cover Patient Organs The "dark angle" area of the twisted part. Another object of the present invention is a magnetic resonance system type C magnet with a horizontal magnetic field: The type C magnet can be used to generate a linear strong magnetic field, which can last for a large distance. 'It has a special application in magnetic resonance imaging, and can overcome the shortcomings of spiral tube magnets and C-type magnets used in conventional magnetic resonance systems. The structure of the C-type magnet with a horizontal magnetic field is as follows: As shown in Fig. 17, a long slot (2 1) can be formed in the center of a rectangular and large stainless steel box body (20), so that it forms a "concave" shape (such as the twenty-eighth (As shown in the figure), and the long groove (2 1) is closed relative to the groove wall (2 1A) to (2 1C) of the box body (20), and the long groove (21) is opposite the groove wall (21A) (21C) 23 rtt first read the notes on the back and then fill out this page &gt; Install —! 1 order --------- line, printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, China ^ # i ^ CNS) A4 specifications (210 X 297 mm). ^ A7 B7 V. Description of the invention (丄 &gt;) There is a support #arm (2 G 1) 'to strengthen the mechanical structure. "And the hollow inner space (226) of the aforementioned concave box body (20) is provided with a c-type magnet with a horizontal magnetic field (opening upwards) (shown in Figures 8 and 29) 'and the refrigerant is filled to Box body (20 "inner C-type magnet not filled in the gap for superconducting work. The C-type magnet includes: magnetic pole surface (211); active / passive gap filling outside the magnetic pole surface (2 1 1) (2 12) * The gradient coil (2 13) located outside the active / passive gap filler (2 12), the exciter (2 5) located inside the magnetic pole surface (2 1 1); connected to the opposite two exciters ( 2 1 5) return path of the iron core (2 workers 7); where: the pole surface (2 1 1) is a laminated magnetic pole surface, which is used to correct the uniformity or strength of the magnetic field for the second time. The exciter (2 i 5) An active / passive interstitial sheet (2 1 8) is provided on the back side, and the active / passive interstitial month (2 i δ) is composed of a multi-layer overlapping sheet body, and an active interstitial sheet is also sandwiched by an inner clip. The ferromagnetic sheet is made of charged steel. Also, the long groove (2 1) of the box body (20) is provided with an active shim (2 1 6) to correct the asymmetry of the c-shaped iron core arm. Because the core arm will distort the uniformity of the magnetic field, the first uniform correction of the magnetic field can be achieved by the active ^ / passive shim (2 1 8) behind the magnetic pole surface (2 1 1). And the conductive body is used as an active interstitial sheet. This magnetic 24 paper size applies to the Chinese national standard &lt; CNS) A4 size (210 X 297 mm) (Please read the precautions on the back before filling this page &gt; -------- Order --------- Bee ~ &4; 4 3 93 2 3 Printed by A7 B7, Consumer Cooperative of Intellectual Property Bureau, Ministry of Economic Affairs V. Description of invention (J) 1 1) The first shim on the inner side can be seen particularly in US Pat. No. 4,656,449 of jr iard and Feneale. The assembly of the magnetic resonance system is shown in figure 29, which includes a A central controller (300); a radio frequency transmitter (301) connected to the aforementioned central controller (0), for selectively applying radio frequency signals to a transmitting coil (22 1) at the patient's to excite the magnetic field Magnetic resonance of the middle dipole; a gradient field controller (305) 'connected to the central controller (300)' for applying signals A gradient magnetic field coil (2 1 3) at the patient 'generates a magnetic field between two magnetic poles to generate a gradient' for decoding magnetic resonance signals; a signal receiver (3 0 4) uses a receiving coil as an antenna 'to Receiving magnetic resonance signals from the detection site; an image processor (or image restoration device) (306) for performing inverse fast Fourier transform to restore the images represented by the received magnetic resonance signals; / memory (3 0 7) is used to store the image data processed by the image processor (306); a display (308) is used to display the image data processed by the image processor (3β). The aforementioned central controller 300 controls the radio frequency transmitter (301) and the gradient field controller (305) to perform a predetermined magnetic resonance imaging step. The aforementioned magnetic resonance system can be installed in the lower layer of the operating room, and the paper size of the upper and lower layers is 25. The paper size applies to the Chinese National Standard (CNS) A4 specifications &lt; 210 X 297 mm (please read the precautions on the back before filling this page). -------- Line> A7 E7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (-f) Magnetic barriers and barriers (223) that prevent radio frequency signals can be used for isolation 'and appropriate. A movable door (2 2 5) and a lifting mechanism are provided. When the movable door (2 2 5) is opened, the patient (2 1 4) can be lowered into the box body (2 0) together with the lying bed (2 1 9). In the magnetic pole gap, using this design, the 'life support system (220) can follow the patient closely, and it does not change because it enters the magnetic pole gap.俟 When the patient enters the magnetic pole gap, the position of the patient bed (21) can be adjusted by using an active shim (2 1 6) to compensate for the asymmetry in the magnetic pole gap. Furthermore, when performing magnetic resonance imaging, a transmitting coil (22 1) is provided on the patient's body, and a planar or other form of receiving coil (22 2) is provided on the affected part for imaging. Regarding the way the patient enters the magnetic pole gap, in addition to the vertical lifting method shown in Figure 29, the patient can also be pushed into the magnetic pole gap horizontally as shown in Figure 30. From the above description, the specific technical content of the present invention can be seen. As for the advantages it can achieve, the following is the first in terms of the built-in antenna: (1) Limiting the imaging area: This can provide enhancements in the area near the coil or in the space. Image to obtain an enlarged or enlarged map of the area under test. (2) Compared with endoscope, the advantage is that magnetic resonance technology can penetrate the wall of the tissue to provide an image behind the wall, and it can overcome optical obstacles such as blood or fat. Furthermore, after endoscopic examination detects lesions on the tissue wall, the magnetic resonance system using these RF receiving coils can provide images behind the tissue wall to monitor the growth of the lesion. -1 1 1 L 11 I &gt; — Ml I 1.1 ^-III 1 III »— — — — — — — — ^. (Please read the notes on the back before filling in this page}

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 4.3 93 2 3 Α7 ----------- B7____ V. Description of the invention 〇 For reference of medical plans and surgical treatment. (3) It can fit tightly on the body wall or organ, such as rectum, bowel, vagina, moon or surgical incision, etc., so that the relative movement will not cause problems in the image of the magnetic resonance system. C4) User-friendly and patient-friendly: Whether endoscopic or cannula, it is more user-friendly than ultrasonic detection or rigid rod method 'and ultrasonic detection or rigid rod The application of the method is usually limited to the entrance of the deep or straight body or into the vagina or the entrance of the vagina, and the hard rod used for insertion is very particular about the shape, size and hardness requirements. In contrast, the flexible and expandable balloon structure 4 of the present invention is 'more patient-friendly' and can avoid discomfort. (5) There is no concern about health and safety: any plastic material will absorb a certain amount of Moisture 'is therefore not 100% sterile. Therefore, the present invention adopts a disposable structure to prevent infectious diseases, such as human immunodeficiency virus (HIV), hepatitis B and other infectious diseases, and ensure that patients suffer from indirect infection. (6) Can be twisted in human organs: that is, the shape, size, and angle of the 'built-in antenna can be changed with different types of organs' in the organs or the body of the human organs, and it varies from patient to patient. Among them, the flexible pipe or casing method can make it more practical, multiplexed, and user-friendly. As for the coil unit in various situations will change its inductance, you can use the automatic tuning and matching system to improve the performance of the flexible coil assembly. As for the C-type magnet with horizontal magnetic field, it includes the following advantages: (1) Utilizing the C-type magnet with horizontal magnetic field of the present invention 27 The paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) ( Please read the note f on the back before filling in this page) Binding ---- order --------- line}. A7 ___B7 'a · —__ -__ 5. Description of the invention (a)' can be vertical The direction is entered in a lifting way or pushed in in a horizontal direction, and its spatial form is relatively wide, which can prevent patients from feeling claustrophobic. ， 工 (2) ㈣ can use 2 wide, meaning that living systems such as drips can be When the patient enters the magnetic pole space, it is not limited by the magnetic pole space. (3) Compared with the spiral tube magnet, the C-type magnet is cheaper in cost.… In summary, the present invention proposes a c-type in a magnetic resonance system Magnets and built-in antennas can indeed achieve the advantages listed above. Compared with the existing devices, they have significantly improved efficiency and meet the requirements of invention patents. They apply in accordance with the law. First read the notes on the back Ϊ'Fill this page) Order: --Economy Intellectual Property Office employees consumer cooperatives paper printed 28 scale applicable to Chinese National Standard (CNS) A4 size (210 X 297 mm)

Claims (1)

Α8 Β8 C8 D8 "Scope of patent application 1. A built-in antenna of a magnetic resonance system, which includes at least a guide element and a coil unit provided at one end of a catheter assembly; wherein: the catheter assembly is made of multiple tubes inside and outside the casing The coil unit is in the form of a flexible stretchable balloon (FERB, Flexible, Expandable &amp; Retractable Balloon), which penetrates the inside of the organ's body through the catheter assembly, reaches the correct part, and then makes the wire The tritium unit expands to abut against the tissue wall to obtain an image. 2 · As described in the first patent application, the magnetic resonance system: a built-in antenna, the catheter assembly at least includes: A flexible hollow tube connected to the air pump; a set of inner tubes provided outside the hollow tube and provided with the coil unit at one end; a set of outer tubes provided outside the inner tube; wherein: the coil unit is normally covered by an outer tube Suppose that when the 俟 extends into the part to be measured in the patient's body, the outer tube is pulled out to expose the coil unit to the tissue. 'Then it is inflated to expand the coil unit. It is pressed against the woven wall of the part to be measured in order to obtain the ideal quality image. 3 · According to the built-in antenna of the magnetic resonance system described in item 2 of the patent application scope, the hollow tube is provided with an air inlet valve at one end for It is connected to the air pump and the other side is provided with an air inlet pipe. 4 · As in the built-in antenna of the magnetic resonance system described in item 2 or 3 of the scope of the patent application, a hollow wire is passed through the wire, and one end of the wire is connected to the coil unit. The terminal is connected to an external tuning and matching circuit. 5 · Built-in magnetic resonance system as described in item 2 of the scope of patent application _ 29 _______ This paper size is applicable to China National Standard (CNS) A4 (210 × 2ίϊ7 mm) -3 (Please read the precautions on the back before you write this page) as · ♦ Printed by the Intellectual Property Bureau of the Ministry of Economy, Employees ’Cooperatives δ δ 8 8 ABCD Patent Application Scope Antenna 'The coil unit includes a built-in antenna A radio frequency coil at one end of the tube and a balloon end located at the same end of the inner tube and located outside the radio frequency coil 3 6 · The built-in antenna of the magnetic resonance system as described in item 5 of the scope of patent application 'The radio frequency coil It is composed of a plurality of copper circuit strips, and each copper circuit strip is formed by depositing a copper circuit with a thickness of 50 ~ 1G5mm on a polyester resin film having a thickness of 50 ~ 70 ram. The built-in antenna of the magnetic resonance system described in the item 'The RF coil is further constrained by adjacent or staggered strips to form a certain shape' The strip is made of polyester resin film or other flexible plastic materials. 8 The built-in antenna of the magnetic resonance system according to item 6 or 7 of the scope of the patent application: The other end of the copper wire strip or the restraining strip is connected to the tip of the hollow catheter by a fixing ring. 9. The built-in antenna of the magnetic resonance system according to item 8 of the scope of patent application, the fixing ring may be made of delrin or plastic material. 10. The built-in antenna of the magnetic resonance system as described in item 8 of the scope of the patent application, a capacitor-like element can be placed on the fixed ring. Printed by the Shell Standard Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (please read the note # ^ on the back before filling out this page). Order 11 · The built-in antenna of the magnetic resonance system described in item 2 of the scope of patent application. A latex sleeve is sleeved at one end of the corresponding coil unit, and is fixed with a proper sealing element sleeve. 12. According to the patent application, the built-in antenna of the magnetic resonance system described in item i, the latex sleeve is composed of a condom. The built-in magnetic resonance system described in item 5 of the previous 3 patent applications, and the 4 balloon end may be a long cylindrical shape, such as a sausage shape, for use in 4 3 9323 A8 B8 C8 D8 Scope of patent application Zhiyang area. mi4: The built-in f of the magnetic resonance system described in item 5 of the patent, please read the precautions on the back before filling in the wooden page) = The two ends of the ball can be connected together in strings, such as the same string of sausages. Into the intestine. The built-in antenna of the magnetic resonance system as described in the fifth item of the Shenw patent may have a long rectangular shape for prostate imaging. ★ The built-in of the magnetic resonance system described in Item 5 of the patent μ = = antenna 'The balloon end can ride a rectangle and has a ring segment at the distal end: Shape' This ring segment is used to hook the cervix for shooting The cervix, the area / space above the cervix, and the peripheral area / space outside the vagina. ^ * If you apply for the built-in antenna and wire of the magnetic resonance system described in item 5 or 6 of the full-time application, the RF coil can be composed of a single winding. 1 8 · Please refer to 5 or 6 for the built-in antenna of the magnetic resonance system. The radio frequency coil can be composed of two half coils. 19. The built-in antenna of the magnetic resonance system according to item 5 or 6 of the Chinese Patent Application, the radio frequency coil can be composed of two coils partially overlapping. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. ‘The internal antenna of the magnetic resonance system as described in item # 9 of the Chinese Patent Application, the optimal overlap area of the two coils is about 10.3%. 21. According to the built-in antenna of the magnetic resonance system described in item 5 of the scope of the patent application, the RF coil can be composed of multiple coils and overlap each other, so as to provide the best signal-to-noise ratio for vaginal area / space imaging. , 2 2 · &gt; The built-in antenna of the magnetic vibration system described in item 5 of the scope of patent application, the radio frequency coil may be composed of multiple sets of coils with a common arm, and each common arm is arranged at an equal angle. A8 B8 C8 D8 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 4 3 93 2 3 VI. Patent Application Park 2 3. The built-in antenna of the magnetic resonance system as described in the patent application scope No. χ, 2 or 5 There is a sensor. The sensor is passed between the inner tube and the outer tube by a wire, and is connected to an external display unit to detect whether the display coil unit has been expanded against the tissue wall. 2 4 ‘The built-in antenna of the magnetic resonance system according to item 23 of the scope of patent application, the display unit is composed of a light emitting diode. 2 C-type magnets of 5 types of magnetic resonance systems. This type of magnetic system makes the two magnetic poles face each other horizontally to generate a horizontal magnetic field. 26. According to the € magnet of the magnetic resonance system described in item 25 of the patent application scope, the C magnet is accommodated in a concave box, and a magnetic pole gap is formed between the long grooves opened in the center of the box, so that A horizontal magnetic field is generated, and the c-type magnet is connected with a control unit 9 2 7. The C-type magnet of the magnetic resonance system as described in item 25 or 26 of the patent application scope, the C-type magnet includes at least: a magnetic pole surface ; Active / passive shims on the outside of the magnetic pole face; gradient coils on the outside of the active / passive shims; exciter on the inside of the magnetic pole face; iron core return path connecting the opposite two exciters. 2 8 · The c-type magnet of the magnetic resonance system according to item 27 of the Chinese Patent Application, the magnetic pole surface is a laminated magnetic pole surface, which is used for the second time to correct the uniformity or strength of the magnetic field. 2 9. According to the patent claim No. 27 of the scope of the magnetic resonance system of the c-type magnet 'the back side of the exciter is equipped with passive interstitial sheet, the passive interstitial sheet system (please read the precautions on the back before reading Filling the nest This paper is applicable to Chinese National Standard (CNS) A # Secret (21〇χ297 mm) 4 3 93 2 3 #, patent application scope A8 B8 C8 D8 It is composed of multiple layers of laminated body and 嗲 electric steel plate. The film system consists of a strip of ferromagnetic sheets (please read the note ^^ on the back before filling out this page) 3 〇 If the patent application scope of the type 2 6 magnet, the box body 4 suspect A grave magnetic vector There is an active / passive shim in the c correction chamber of the system to correct the asymmetry of the c-type magnet core arm. Type magnetic fiber application ^ magnet of the magnetic resonance system described in item 26 of the patent scope, the control unit includes: a central controller; a radio frequency transmission H 'is connected to the aforementioned central control fairy, for selective The radio frequency signal is applied to the transmitting coil at the patient to excite the magnetic resonance of the dipoles in the magnetic field. A gradient field control unit is connected to the central unit for transmitting the signal to the gradient magnetic field coil at the patient. A magnetic field gradient is generated in order to decode the magnetic resonance signals; a signal receiver uses a receiving coil as an antenna to receive magnetic resonance signals from the detection site; An image processor (or image restoration device) for performing inverse fast Fourier transform to restore the image represented by the received magnetic resonance signal; a memory for storing image data processed by the image processor; a display for use To display the image data processed by the image processor. 32 · According to the C-type magnet of the magnetic resonance system described in item 25 or 26 of the scope of the patent application, the C-type magnet can be located in the lower level of the operating room, with ____ 33. The paper size applies to the Chinese National Standard (CNS) A4 specification (21〇 &gt; &lt; 297 mm) 4 3. Smart A8 B8 C8 D8 The Ministry of Economic Affairs Central Standards Bureau employee consumer cooperative prints barriers to prevent magnetic interference and radio frequency signal interference, and is equipped with ―, tongue moving door 33. The magnetic resonance system described in item 32 of the patent application scope: The type magnet is located at The patient in the operating room descends vertically into the iron pole gap. 34. According to the C-type magnet of the magnetic resonance system described in item 25 or 26 of the patent application scope, the patient phase is pushed horizontally in the gap between the poles of the human-type magnet. 34 This paper size applies the Chinese National Standard (CMS) Α4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)