JP2009125233A - Magnetic resonance imaging apparatus and high-frequency receiving coil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging apparatus capable of accurately and easily guiding an operating instrument to a specific region of a subject and shortening a treatment time. <P>SOLUTION: This magnetic resonance imaging apparatus is provided with an MRI receiving coil 502, an operating instrument guide section 505 formed with an operating instrument guide hole 504, a pointer 27 for detecting its position and attitude, a holding section 501 which is held by an operator, and operating instrument guide device 36 which the operator can easily move; so as to accurately and easily guide the operating instrument 601 to the specific region of the subject. This apparatus is adapted to automatically display a cross section including the specific region 412 when the set specific region 412 is present in the predetermined distance range from the operating instrument guide device 36 so that, when an operator previously sets the specific region 412 of the subject, registers it in a personal computer 19, and turns on an imaging position specification mode, then the operator can easily determine the position of the specific region. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnetic resonance imaging apparatus that captures and displays a cross-sectional image of a subject based on surgical instrument position information.

  A magnetic resonance imaging apparatus (MRI apparatus) is used for cardiac imaging, puncture monitoring during surgery, and percutaneous treatment. This is called an I-MRI apparatus (Interventional-MRI apparatus or Intraoperative-MRI apparatus), and there is a demand for arbitrarily setting a tomographic plane to be imaged in real time. As a method for arbitrarily selecting a tomographic plane to be imaged, a method of displaying an MRI image on a graphical user interface, clicking a button on the screen, and determining a tomographic plane to be imaged next, a three-dimensional mouse, etc. A method of using it has been proposed.

  In these methods, since the position and orientation of the tomographic plane to be imaged must be adjusted and set by an input means such as a mouse, the MRI apparatus can adjust the position and orientation of the tomographic plane to be imaged more easily. It is desirable that it can be set. As such a technique, an MRI apparatus that determines a tomographic plane to be imaged using a tomographic plane indicating device (such as a pointer) has been proposed.

  Patent Document 1 discloses a technique that can automatically search for a surgical path when a subject is operated using an MRI apparatus or the like. The technique described in Patent Document 1 is a technique that uses a surgical path obtained by a conventional technique as a candidate path and applies it to a dynamic contour model.

  Patent Document 2 describes an RF coil for effectively performing interventional imaging. The technique described in Patent Document 2 is a coil that surrounds a subject, and is a technique that makes it possible to change the relative inclination of the coil with respect to the subject and facilitate the treatment.

  Further, Patent Document 3 describes an RF coil provided with a puncture needle support in order to eliminate the complexity of individually positioning the RF coil and the puncture needle support.

JP 2003-30624 A JP 2000-354589 A JP 2001-104279 A

  However, in the techniques described in Patent Documents 1 and 2 above, the surgical path can be automatically searched and the inclination of the RF coil can be changed. However, the surgical instrument is accurately placed on a specific region of the subject. And it was difficult to guide easily.

  Further, in the technique described in Patent Document 3, it is possible to eliminate the trouble of individually positioning the RF coil and the puncture needle support, but in order to image a specific region of the subject, Although it is necessary to move and fix the RF coil to that position, the work is complicated, and once fixed, it is difficult to move to another position. For this reason, even with the technique described in Patent Document 3, it has been difficult to accurately and easily guide the surgical instrument to a specific region of the subject.

  An object of the present invention is to realize a magnetic resonance imaging apparatus capable of guiding a surgical instrument accurately and easily to a specific region of a subject and shortening a treatment time.

  In order to achieve the above object, the present invention is configured as follows.

  In the magnetic resonance imaging apparatus, a high-frequency receiving means, a surgical instrument guide means having a surgical instrument guide part and an operator holding part, and a position detection means for detecting the position and posture of the surgical instrument guide means, the control means, A cross section of the subject is set based on the position and orientation of the surgical instrument guiding means detected by the position detecting means, and the cross sectional image of the subject is based on the magnetic resonance signal received by the high frequency receiving means of the surgical instrument guiding means Is displayed on the image display means.

  It is possible to realize a magnetic resonance imaging apparatus that can accurately and easily guide a surgical tool to a specific region of a subject and can shorten a treatment time.

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

  FIG. 1 is an operation flowchart of an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of an MRI apparatus to which the present invention is applied.

  First, the MRI apparatus will be described with reference to FIG. The MRI apparatus 1 is, for example, a vertical magnetic field type 0.3T permanent magnet MRI apparatus, and includes an upper magnet 3 and a lower magnet 5 that generate a vertical static magnetic field, a support 7 that connects these magnets and supports the upper magnet 3, A position detection device 9, an arm 11, a monitor 13, a monitor support unit 15, a reference tool 17, a personal computer 19, a bed 21, and a control unit 23 are provided.

  The gradient magnetic field generation unit (not shown) of the MRI apparatus 1 generates the gradient magnetic field generation unit in a pulse manner, has a maximum gradient magnetic field strength of 15 mT / m and a slew rate of 20 mT / m / ms. The MRI apparatus 1 further includes an RF transmitter (not shown) for generating nuclear magnetic resonance in the subject 24 in a static magnetic field, and an RF receiver (not shown) for receiving a nuclear magnetic resonance signal from the subject 24. Is a 12.8 MHz resonant coil.

  The position detection device 9 includes two infrared cameras 25 and a light emitting diode (not shown) that emits infrared light, and detects the position and posture of a pointer 27 that is a tomographic plane indicating device. Further, the position detection device 9 is connected to the upper magnet 3 so as to be movable by the arm 11, and the arrangement relative to the MRI apparatus 1 can be appropriately changed as shown in FIG.

  As shown in FIG. 2, the monitor 13 holds the holding unit 501 of the surgical instrument guiding instrument 36 and displays an image of the tomographic plane of the subject 24 indicated by the pointer 27. The unit 15 is connected to the upper magnet 3 in the same manner as the infrared camera 25. The reference tool 17 links the coordinate system of the infrared camera 25 and the coordinate system of the MRI apparatus 1, includes three reflecting spheres 35, and is provided on the side surface of the upper magnet 3.

  The position of the pointer 27 detected and calculated by the infrared camera 25 is transmitted to the personal computer 19 via the RS232C cable 33 as position data, for example. The control unit 23 includes a workstation and controls an RF transmitter, an RF receiver, and the like (not shown). The control unit 23 is connected to the personal computer 19.

  In the personal computer 19, the position of the pointer 27 detected and calculated by the infrared camera 25 is converted into position data usable by the MRI apparatus 1 and transmitted to the control unit 23. The position data is reflected on the imaging section of the imaging sequence. An image acquired with a new imaging section is displayed on the liquid crystal monitor 13. The image is simultaneously recorded in the video recording device 34.

  Here, the surgical instrument guiding instrument 36 includes a surgical instrument guide portion 505 in which a surgical instrument guide hole is formed, and the surgical instrument guiding position is obtained by attaching the pointer 27, which is a tomographic plane specifying device, to the surgical instrument guiding instrument 36. Can always be grasped, and it becomes possible to continuously image the prescribed cross section facing the surgical instrument guiding instrument 36. Furthermore, by incorporating the MRI receiving coil 502 in the surgical instrument guiding instrument 36, the peripheral region can be imaged with high sensitivity, and the automatic tuning function of the receiving coil 502 is provided to always provide a good image and optimal treatment. An environment can be provided.

  Further, it has a function of accurately guiding the surgical instrument to the target using the puncture guide function projected on the monitor 13.

  Next, the operation of one embodiment of the present invention will be described with reference to FIG. In FIG. 1, as pre-operative work, after the subject is carried into the MRI gantry, 3D imaging by MRI is performed (step 101), extraction of one or a plurality of specific regions (calculation of regions to be imaged), and pre-operative simulation ( Step 102). Then, each surgical device and the IVR-ISC device (IVR-surgical instrument follow-up imaging function) are activated (step 103).

  As soon as the preparation is completed, the operation is started (step 104), and the surgeon moves the movable small receiving coil built-in surgical instrument guiding instrument 36 to the vicinity of the affected area (step 105). Is used to track and specify the surgical instrument guide instrument position 36, and the specific area closest to the coil is internally calculated (step 106). If necessary, the bed movement and automatic tuning of the receiving coil of the surgical instrument guiding instrument 36 are performed so that the specific area is at the center of the magnetic field (step 107), and the specified cross section including the specific area is continuously imaged (step 108). Then, every time the receiving coil 502 moves by a certain distance, the receiving coil 502 is automatically tuned, and continuous imaging is performed at the moving destination.

  Here, since the cross section including the specific region is automatically extracted and imaged, a constant image that is not affected by the convenience of the surgical instrument guiding instrument 36 can be provided regardless of the orientation of the receiving coil (step). 109). Further, if necessary, a foot switch or a hand switch can be provided to change various imaging conditions (step 110). For example, a predetermined image position is changed.

  It is determined whether or not the position / orientation of the receiving coil 502 has changed (step 111). If there has been a change, the receiving coil 502 is automatically tuned (step 112), and the process returns to step 108. If there is no change in the position / orientation of the receiving coil 502, it is determined whether or not there is a change in the region of interest (step 113). If the region of interest is changed in step 113, the process returns to step 105.

  If there is no change in the region of interest in step 113, it is determined in step 114 whether or not the puncture position has been determined (step 114). If there is a change in the puncture position, the process returns to step 105 to guide the surgical instrument. The instrument will be moved and redo from the internal calculation of the specific area. In step 114, when the puncture position is determined, that is, when the puncture position / direction is determined, the puncture guide function (step 115) is used together to assist the operator so that a good image and an optimal treatment environment are always obtained. Can be provided.

  FIG. 3 is a diagram showing a GUI display example according to an embodiment of the present invention. In FIG. 3, navigation software 402 is shown on the left side of the screen 401. Also, on the right side of the screen 401, an IVR-ISC real-time image is displayed in addition to surgical tools / devices and surgical information, and a function that allows real-time display of a three-dimensional image of a specific region and surgical information in conjunction ( Display unit 403).

  As a usage method, first, when a 3D imaging button (3D Scan) 404 for performing 3D imaging is pressed, three-axis sectional images 405, 406, and 407 and a Volume Rendering image 408 are displayed. Further, the specific area 412 is extracted using a function button (Extract) 411 for extracting the specific area. At the time of actual surgery, the real-time image 421 is displayed by using the ISC function together with the ISC button (ISC: On / Off) 420, and the position of the surgical tool by using the navigation button (navigation: On / Off) 422 together with navigation. Surgery information including each video / image and patient information is independently displayed and recorded on the display unit 424.

  There is also a screen unit 423 for independently displaying only specific regions (blood vessels, tumors, etc.) 412 and surgical tools 425 extracted before surgery, and the surgeon can perform surgery using necessary screens. Further, as a function used during surgery, there is an optional function for performing surgery support (display unit 430). The ISC imaging cross section can be freely switched between the three-axis cross sections of Axial (Axial) 432, Sagital (Sag.) 433, and Coronal (Cor.) 434, and offset imaging is also possible (offset button (offset: mm)). 435).

  Further, by using the imaging position specifying mode together as necessary, the specific area registered in advance is imaged intensively (imaging position specifying mode button (imaging position specifying mode: On / Off) 431). When the approach position and method to the target are determined, the puncture guide mode button (puncture guide mode) 436 is used to accurately guide the surgical instrument to the target.

  FIG. 4 is a schematic configuration diagram of the surgical instrument guiding instrument / movable small coil 36 according to the embodiment of the present invention. In FIG. 4, a pointer 27 that is a tomographic plane specifying device is attached to the surgical instrument guiding instrument 36, and by defining a prescribed cross section for the pointer 27, ISC imaging with respect to the position of the surgical instrument guiding instrument 36 is possible. Become.

  In addition, an MRI receiving coil 502 is incorporated inside the surgical instrument guiding instrument 36, and high-sensitivity image information can be provided to the surgeon while being in close contact with the affected part of the subject. In addition, a surgical instrument guide 505 in which a hole 504 for puncturing or guiding a surgical instrument is formed at the center of the surgical instrument guiding instrument 36 is fixed by a fixing tool 503. The surgeon holds the holding part 501 and moves the surgical instrument guiding instrument 36 combined with a movable coil as necessary, diagnoses the target site, and performs a puncture or surgical instrument using the triaxial cross section and the Volume Rendering image. Determine the insertion position.

  The surgeon can guide the surgical instrument to the target while inserting the surgical instrument from the surgical instrument guide hole 504 and grasping the surgical instrument position using the surgical instrument guide function. As an example of the dimensions of the surgical instrument guiding instrument, the diameter of the MRI receiving coil 502 is about 10 cm, and the length of the holding portion 501 is about 10 cm.

  FIG. 5 is an explanatory diagram of a puncture guide (surgical instrument guiding function) in the surgical instrument guiding instrument 36 according to an embodiment of the present invention. In FIG. 5, after defining the prescribed cross section for the pointer 27 as described above, the surgical instrument 601 is inserted into the hole 504 for guiding the surgical instrument 601. Here, a sensor for measuring the approach distance of the surgical instrument 601 is built in the surgical instrument guide portion 505 in which the surgical instrument hole 504 is formed, and the distance 603 at which the distal end 602 of the surgical instrument 601 enters the hole 504 is always calculated. I can grasp it.

  The measured approach distance is displayed on the three-axis cross section in the intraoperative guide function and the Volume Rendering image, and is configured so that the position of the surgical instrument 601 can be visually recognized. In addition, real-time cross-sectional imaging by ISC is also performed at the same time, and the position of the surgical instrument can be confirmed as necessary. Thus, it becomes possible to raise the precision of an operation | movement by grasping | ascertaining a surgical instrument position using several functions together.

  6 and 7 are diagrams showing ISC imaging cross-sectional configuration diagrams of the mobile small-sized receiving coil built-in surgical instrument guiding instrument 36. FIG. As a pre-operation, a prescribed cross section for the pointer 27 attached to the surgical instrument guiding instrument 36 and the surgical instrument guiding instrument 36 is defined. First, the normal imaging section 701 is defined. The normal imaging section 701 is a plane in which the center of the normal imaging section 701 and the center of the reception coil 502 coincide and are orthogonal to the reception coil surface 502. Then, following the definition of the normal imaging section 701, a first orthogonal section 702 and a second orthogonal section 702 are defined.

  The first orthogonal section 702 is a plane in which the center of the first orthogonal section 702 coincides with the center of the receiving coil 502 surface and includes the receiving coil 502 surface. The second orthogonal cross section 703 is a plane in which the center of the second orthogonal cross section 703 coincides with the center of the receiving coil 502 surface and is orthogonal to the receiving coil surface 502 surface and the normal imaging cross section.

  Then, the preoperative preparation is completed by setting the offset directions 801, 802, and 803 for the normal imaging section 701, the first orthogonal section 702, and the second orthogonal section 702, respectively.

  The offset direction is a direction along a line that is orthogonal to the surface of the receiving coil 502 and passes through the center of the surface of the receiving coil 502. In this offset direction, the normal imaging section 701, the first orthogonal section 702, and the second section. An offset value that is a distance by which the center of the orthogonal section 702 is shifted is set.

  FIG. 8 is a diagram for explaining a method of using the surgical instrument guiding instrument 36 in clinical practice. That is, FIG. 8 shows a state in which the operator translates the surgical instrument guiding instrument 36 along the side portion of the subject 24 with respect to the subject 24 in the MRI apparatus, and the imaging position specifying mode is changed. The case where it turned off is shown. By translating the surgical instrument guiding instrument 36 from the initial section 911 of the subject 24, initial sections 911 to 914 corresponding to the position of the surgical instrument guiding instrument 36 shown in the volume image 905 are obtained.

  Here, as shown in FIG. 9, by using together an image obtained when the imaging position specifying mode is turned on, it is possible to selectively use a function of intensively imaging the specific area 412 registered in advance. FIG. 9 shows a state when the operator translates the surgical instrument guiding instrument 36 from the side with respect to the subject 24 in the MRI apparatus, as in FIG. If normal (imaging position specifying mode is off), relative sections 1011, 1012, 1013, and 1014 in accordance with the position of the surgical instrument guiding instrument 36 are imaged. By turning on the imaging position specifying mode, whether or not a specific area exists within a certain range (1031 to 1034) of the surgical instrument guiding instrument 36 is searched, and areas 1021 to 1024 including the specific area are respectively searched. The imaging section is automatically corrected so as to have a section including (imaging sections 1011, 1025, 1013, 1014).

  In the example shown in FIG. 9, the cross section corresponding to the position of the surgical instrument guiding instrument 36 is 1012, but since the area including the specific area is 1022, the cross section 1025 including this is displayed instead of the cross section 1012. .

  FIG. 10 shows an image display example (imaging position specifying mode is off) during ISC (surgical instrument follow-up imaging). FIG. 10 shows a state in which the operator 1101 moves the surgical instrument guiding instrument 36 around the same cross section 1106 of the subject 24 with respect to the subject 24 in the MRI apparatus (movement positions 1111 to 1114). Then, cross-sectional images (1121 to 1124) corresponding to the movement positions 1111 to 1114 are displayed, respectively. Reference numeral 1105 denotes a real-time image.

  Here, since the cross section of the obtained image is determined relative to the surgical instrument guiding instrument 36, the image rotates depending on the orientation of the surgical instrument guiding instrument 36. For example, when the surgical instrument guiding instrument 36 is at the position 1114, the image may be rotated by nearly 180 degrees, which is difficult for the operator to see and may interfere with the treatment.

  Therefore, as shown in FIG. 11, by turning on the imaging position specifying mode, it is possible to eliminate image inversion and fix the imaging cross-sectional direction. That is, the cross-sectional image of the subject 24 is displayed on the display unit 13 based on a certain coordinate system regardless of the posture of the surgical instrument guiding instrument 36.

  FIG. 11 shows a state when the surgeon 1201 moves the surgical instrument guide instrument 36 around the subject 1206 in the same cross section with respect to the subject 24 in the MRI apparatus (movement positions 1211 to 1214). A search is made as to whether or not a specific region exists within a certain range (1241 to 1244) from the surgical instrument guiding instrument 36, and a cross section including the region (1231 to 1234) including the specific region is automatically corrected. It can output as imaging and image data (1221-1224).

  Here, by turning on the imaging position specifying mode, it is possible not only to always capture a section including the specific area (1231 to 1234), but also to capture and output a fixed section. Therefore, it is possible to always provide the surgeon with an image of the prescribed rotation surface that does not affect the direction of the surgical instrument guiding instrument 36.

  FIG. 12 is an explanatory diagram of a puncture guide mode that is an attached function. Here, the imaging position specifying mode is turned on, and the operator 1301 accurately guides the surgical instrument 601 to the target using the surgical instrument guiding instrument 36 and the puncture guide function with respect to the subject 24 in the MRI apparatus. ing.

  The shortest specific area is automatically calculated from the position of the surgical instrument guiding instrument 36 indicated by the surgeon 1301, and the cross section including the specific area is continuously imaged (no image rotation). In addition, on the display screen 402 for the surgeon, the posture direction 1321 of the surgical instrument guide instrument 36 and the surgical instrument guide hole 504 is displayed on the triaxial sections 405, 406, 407 and Volume Rendering 408, and a scale as a distance index is also displayed. Therefore, the surgical instrument 601 can be accurately guided to the target.

  FIG. 13 is a diagram showing a GUI display example in the puncture guide mode. On the left side of the screen 401, navigation software 402 is shown. Also, on the right side of the screen 401, an IVR / ISC real-time image 403 is displayed in addition to surgical tools / devices and surgical information, and has a function that enables real-time display of a three-dimensional image of a specific area and surgical information in conjunction with each other. . The navigation screen 402 displays the posture direction 1401 of the surgical instrument guide instrument 36 and the surgical instrument guide hole 504 on the triaxial sections 405, 406, and 407 and Volume Rendering 408, and also displays a scale as a distance index.

  Furthermore, by automatically measuring the surgical instrument entry distance through the surgical instrument hole 504, an entry locus 1402 is displayed in conjunction with the GUI. In addition, a real-time image 421 by the ISC 420 is displayed, and a surgical instrument approach distance 1404 and a surgical instrument direction 1403 are displayed.

  There is also a screen 423 for independently displaying only a specific region (blood vessel, tumor, etc.) 1408 and surgical instrument 1406 extracted before surgery, and the surgeon performs an operation using information only on the target and the surgical instrument direction. You can also.

  In addition, surgery information 424 including each video / image and patient information is independently displayed and recorded, and has a function of notifying the surgeon of an environmental change by issuing a warning as necessary.

  As described above, according to one embodiment of the present invention, the MRI receiving coil 502, the surgical instrument guide portion 505 in which the surgical instrument guide hole 504 is formed, and the pointer 27 for detecting the position and posture thereof. And the surgical instrument guiding instrument 36 that can be easily moved by the surgeon, so that the surgical instrument 601 can be accurately placed on a specific region of the subject. It can be easily guided.

  When the specific area 412 of the subject is set in advance, registered in the personal computer 19, and the imaging position specifying mode is set to ON, the specific area 412 set within a predetermined distance range from the surgical instrument guiding instrument 36 exists. In such a case, since the cross section including the specific area 412 is automatically displayed, the operator can easily determine the position of the specific area.

  In addition, since the insertion angle and insertion distance of the surgical instrument 601 inserted into the subject 24 from the surgical instrument guide hole 504 of the surgical instrument guide instrument 36 are displayed on the screen, effective surgical operation support is provided. Can be done.

  That is, by using the surgical instrument guiding instrument 36 and the imaging position specifying mode in combination, the approach position and method up to the target are found while intensively imaging the specific area 412 registered in advance, and the operation is performed using the puncture guide mode. The tool 601 can be accurately guided to the target.

  As a result, it is possible to achieve both reduction in treatment time and improvement in treatment accuracy, and to reduce the burden on the operator / subject.

  It should be noted that the present invention can be applied to both treatment based on operator confidence (procedure) and indirect surgery using a robot / manipulator.

It is an operation | movement flowchart of one Embodiment of this invention. 1 is a schematic configuration diagram of an MRI apparatus to which the present invention is applied. It is a figure which shows the example of a GUI display in one Embodiment of this invention. It is a schematic block diagram of the surgical instrument guide instrument in one Embodiment of this invention. It is a puncture guide function explanatory drawing of the surgical instrument guide instrument in one Embodiment of this invention. It is a mimetic diagram showing an ISC imaging sectional view of a surgical instrument guidance instrument in one embodiment of the present invention. It is a mimetic diagram showing an ISC imaging sectional view of a surgical instrument guidance instrument in one embodiment of the present invention. It is a figure which shows the ISC image structure (imaging position specific mode off) at the time of parallel movement of the surgical instrument guide instrument in one Embodiment of this invention. It is a figure which shows the ISC image structure (imaging position specific mode ON) at the time of the parallel movement of the surgical instrument guide instrument in one Embodiment of this invention. It is a figure which shows the same in-plane imaging ISC image structure (imaging position specific mode off) of the surgical instrument guidance instrument in one Embodiment of this invention. It is a figure which shows the same surface imaging ISC image structure (imaging position specific mode ON) of the surgical instrument guidance instrument in one Embodiment of this invention. It is a figure which shows the puncture guide function ISC image structure (imaging position specific mode ON) in one Embodiment of this invention. It is a figure which shows the example of a GUI display at the time of the puncture guide mode in one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... MRI apparatus, 3 ... Upper magnet, 5 ... Lower magnet, 7 ... Support | pillar, 9 ... Position detection device, 11 ... Arm, 13 ... Monitor, 15 ... Monitor support unit, 17 ... reference tool, 19 ... personal computer, 21 ... bed, 23 ... control unit, 24 ... subject, 25 ... infrared camera, 27 ... Pointer, 29 ... operator, 34 ... video recording device, 35 ... reflection sphere, 36 ... surgical instrument guiding instrument, 501 ... holding part, 502 ... MRI receiving coil, 504 ... surgical tool guide hole, 505 ... surgical tool guide part, 601 ... surgical tool

Claims (8)

Static magnetic field generating means, gradient magnetic field generating means, high frequency transmitting means, high frequency receiving means, image display means for displaying an image of a subject, the static magnetic field generating means, gradient magnetic field generating means, high frequency transmitting / receiving means, and image In a magnetic resonance imaging apparatus having control means for controlling display means,
A surgical instrument guiding means having a high-frequency receiving means, a surgical instrument guide part, and an operator holding part;
Position detecting means for detecting the position and posture of the surgical instrument guiding means;
The control means sets a cross section of the subject based on the position and posture of the surgical instrument guiding means detected by the position detecting means, and receives the magnetic field received by the high frequency receiving means of the surgical instrument guiding means A magnetic resonance imaging apparatus, wherein a cross-sectional image of a subject is displayed on the image display means based on a resonance signal.   2. The magnetic resonance imaging apparatus according to claim 1, wherein when the specific area of the subject is set in advance, the control means determines whether the specific area is within a predetermined distance range from the surgical instrument guiding means. If the specific region is within a predetermined distance range from the surgical instrument guiding means, a cross-sectional image including the specific region is taken and displayed on the display means.   3. The magnetic resonance imaging apparatus according to claim 2, wherein the control unit displays a cross-sectional image of the subject on the display unit based on a certain coordinate system when a specific region of the subject is set in advance. And a magnetic resonance imaging apparatus.   2. The magnetic resonance imaging apparatus according to claim 1, wherein a guide hole into which the surgical instrument is inserted is formed in the surgical instrument guide portion of the surgical instrument guiding means, and a distance at which the surgical instrument is inserted into the guide hole is measured. A magnetic means characterized in that the control means displays on the display means the insertion distance of the surgical instrument measured by the measuring means and the direction in which the surgical instrument is inserted into the subject. Resonance imaging device.   5. The magnetic resonance imaging apparatus according to claim 4, wherein the control unit continuously images a plurality of cross-sections at predetermined positions in accordance with the continuous movement of the surgical instrument guiding unit. .   6. The magnetic resonance imaging apparatus according to claim 5, further comprising switch means for changing the predetermined position.   2. The magnetic resonance imaging apparatus according to claim 1, wherein the control means tunes the high-frequency receiving means of the surgical instrument guiding means every time the surgical instrument guiding means moves a certain distance. apparatus. In a high-frequency receiving coil used in a magnetic resonance imaging apparatus,
A high-frequency receiving coil comprising a surgical instrument guide section, an operator holding section, and a pointer indicating a posture.

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