JP2005110865A - Treatment instrument for image guide treatment and magnetic resonance imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic resonance imaging device capable of picking up tomographic images at the tip position of a treatment instrument in real time. <P>SOLUTION: A control means 111 controls a position computing means 112 and acquires the position information of the treatment instrument 202 from the position of a reference pointer 201 whose image is picked up by a detection camera 113 and a pointer position that a first treatment instrument 202 has. The position computing means 112 acquires detection data obtained from the detection camera 113 and converts the detected position of the pointer of the treatment instrument 202 to position data in a device main body. The control means 111 to which tip part position information for the insertion part of the treatment instrument 202 is inputted from the position computing means 112 reconstitutes the tomographic images at the tip position of the insertion part of the treatment instrument 202 by controlling a magnetic field to be impressed to a patient's body 101 and a reading magnetic field at the time of receiving NMR signals by a reception coil 105. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image-guided treatment instrument and a magnetic resonance imaging apparatus, and more particularly to a technique for capturing in real time a tomographic image at the tip position of a treatment instrument inserted into a subject.

  An imaging object of MRI (magnetic resonance imaging) is a main constituent substance of a subject, proton, which is widely used clinically. By imaging the spatial distribution of the proton density and the spatial distribution of the relaxation phenomenon in the excited state, the form or function of the human head, abdomen, limbs, etc. is photographed two-dimensionally or three-dimensionally. Currently, 256, 512, etc. are used as the spatial resolution. Also, 1024 has been tried in part as a high spatial resolution image.

  A typical MRI apparatus includes a magnet that generates a static magnetic field around a subject, a gradient magnetic field coil that generates a gradient magnetic field in a space in which the subject is disposed, an RF coil that generates a high-frequency magnetic field in this region, And an RF coil for detecting an MR signal generated by the subject.

  The gradient magnetic field coil is configured by gradient magnetic field coils in three directions of X, Y, and Z, and is configured to generate a gradient magnetic field in accordance with a signal from a gradient magnetic field power source. The RF coil is configured to generate a high-frequency magnetic field in accordance with a signal from the RF transmitter. The signal of the RF coil is detected by the signal detection unit, processed by the signal processing unit, converted into an image signal by calculation, and displayed on the display unit. The gradient magnetic field power source, the RF transmitter, and the signal detector are controlled by the controller, and the control time chart is generally called a pulse sequence.

  Various shapes have been developed for the RF coil, and various types are used depending on the imaging region and the imaging purpose. Among these, the surface coil is an RF coil that images a local site with high sensitivity.

  Conventionally, a local coil has been used for imaging a part that requires high image quality with a small visual field, such as an ear, a temporomandibular joint, or a joint of an extremity. In addition, multiple array coils (also called phased array coils) have been developed in which small surface coils are arranged adjacent to each other to achieve high sensitivity and field of view expansion. On the other hand, in normal head imaging and abdominal imaging, a volume coil having a wide field of view and a relatively uniform sensitivity distribution is used. For this, a multiple element resonator, a slotted tube resonator, and a solenoid coil are known.

  As described above, in image measurement using MRI, only a magnetic field is applied to the subject, so the burden on the subject can be greatly reduced compared to image measurement using X-rays. Further, in image measurement using MRI, a tomographic image in an arbitrary imaging section is controlled by controlling a high-frequency magnetic field applied to a subject from a gradient magnetic field coil in three directions of X, Y, and Z, that is, by controlling a pulse sequence. Can be imaged. Therefore, the MRI apparatus can be applied to various areas such as imaging of tomographic images for diagnosis to monitoring of instruments inserted into a subject such as a puncture needle, a biopsy needle, a cryotherapy probe, and a laparoscope during surgery. Has been made.

  In particular, in a technique called I-MRI (interventional MRI or Intraoperative MRI) that monitors instruments inserted into a subject during surgery (including insertion), a tomographic image at an arbitrary imaging section is taken in real time. In addition, there is a demand for a technique for observing the position of the instrument inserted into the subject.

  In a technique for arbitrarily selecting an imaging section, for example, as described in Non-Patent Document 1, an MRI image is displayed on a graphical user interface, and a button on the screen is clicked to determine the next imaging section. Technology is disclosed. Patent Document 1 discloses a technique using a three-dimensional mouse.

  As a technique for determining an MRI imaging section using a position determination device, for example, Patent Document 2 discloses a technique for performing MRI imaging using information from a position sensor, and Patent Document 3 discloses. An MRI apparatus that determines an imaging section using two infrared cameras and a marker composed of three reflecting spheres is disclosed.

  On the other hand, an open type MRI apparatus is generally used for I-MRI, and there are a double donut type, a C type, and an asymmetric two-post type. The double donut-type open MRI apparatus has a structure in which two donut-shaped magnets that generate a horizontal magnetic field are arranged with a gap therebetween, and is configured to image a subject between the gaps.

  The C-type open MRI apparatus and the asymmetric two-post type open MRI apparatus are configured to generate a static magnetic field in the vertical direction with a hamburger-type magnet. The most open type is an asymmetric two-post type open MRI apparatus, which can be accessed from three directions on the left and right sides and the top of the subject.

US Pat. No. 5,512,827

US Pat. No. 5,365,927 US Pat. No. 6,063,315 "Magnetic Resonance in Medicine: Real-time interactive MRI on a conventional scanner; AB. Kerr et al., 38, pp. 355-367 (1997)"

As a result of examining the prior art, the present inventor has found the following problems.
In I-MRI in the field of brain surgery such as stereotactic brain surgery using a conventional MRI apparatus, it is necessary to accurately grasp the tip position of the treatment instrument and the position of the treatment unit. In the technique disclosed in the above, only a tomographic image at a position designated by the operator can be obtained, and it is necessary for the operator to move the tomographic plane position with the movement of the treatment instrument. There is a problem that it takes time to acquire the I-MRI technique.

  Further, in the technique described in Patent Document 2, since the signal from the radio frequency coil is only expressed as a bright spot in the image, the tracking of the treatment instrument sequentially obtains images, and the position of the bright spot. In order to obtain a tomographic image even at the distal end position of the treatment instrument, it is necessary for the operator to designate the imaging position of the tomographic image based on this spot position, which is a heavy burden on the operator.

  In addition, the technique disclosed in Patent Document 3 only determines an imaging cross section, and in order to capture a tomographic image of the distal end position of the treatment instrument, the operator sequentially performs tomographic images in the same manner as described above. I had to specify the imaging position.

  An object of the present invention is to realize an image-guided treatment instrument and a magnetic resonance imaging apparatus capable of capturing a tomographic image of the distal end position of the treatment instrument in real time.

In order to achieve the above object, the present invention is configured as follows.
(1) The position of the treatment instrument 202 in the image-guided treatment instrument for a magnetic resonance imaging apparatus that detects the position of the treatment instrument 202 and monitors the detected treatment instrument 202 while taking a tomographic image of the subject 101 A position detecting member 302 for detecting the position, and a supporting member 1402a and 1402b for fixing and supporting the position detecting member 302 on the treatment instrument 202, and a holding member 401 attached to the treatment instrument. Is provided.

  (2) Preferably, in (1) above, the treatment instrument 202 is a treatment instrument that acquires an observation image such as a laparoscope or an endoscope.

  (3) For image guide therapy for a magnetic resonance imaging apparatus that detects the position of the insertion member 202 inserted into the body of the subject 101 and monitors the detected insertion member 202 while taking a tomographic image of the subject 101 In the treatment instrument, three or more bright spot means 301a to 301c, a position detection member 302 that supports the bright spot means 301a to 301c separately from each other, and the position detection member 302 are sandwiched and fixed. A holding member 401 that has two or more fixing positions 1402a and 1402b and is attached to the insertion member 202.

  (4) Preferably, in (3) above, the two fixing positions 1402a and 1402b for fixing the position detecting member 302 of the holding member 401 are positions facing each other.

  (5) Static magnetic field generating means 102 that generates a static magnetic field in a space that accommodates the subject 101, gradient magnetic field generating means 103 that generates a gradient magnetic field in the space, and a high-frequency magnetic field that causes magnetic resonance in the subject 101 Irradiating means 104, receiving means 105 for detecting and receiving NMR signals from the subject 101 due to magnetic resonance, and reconstructing an image based on the NMR signals received by the receiving means 105, on the display means 108. In a magnetic resonance imaging apparatus having reconstruction means 111 for displaying and detection means 113 for detecting the position and direction of the treatment instrument 202 inserted into the subject and performing a desired treatment, the position of the treatment instrument 202 is determined. A position detection member 302 for detection and support portions 1402a and 1402 for fixing and supporting the position detection member 302 on the treatment instrument 202. Based on the position of the holding member 401 having two or more b and attached to the treatment instrument, and the position detecting member 302 detected by the detecting means 113, the gradient magnetic field generating means 103 and the irradiating means 104 And a means 112 for collecting a reconstructed image of the imaging surface including the distal end position of the treatment instrument 202, and taking a tomographic image of the subject 101 while monitoring the detected treatment instrument 202.

  According to the above configuration of the present invention, a tomographic image of an examination position or a treatment position can be obtained in real time, so that diagnostic efficiency can be improved.

  Further, the outer extension portions 302a to 302c of the position detecting member 302 that supports the holding means 401 with the bright spot means 301a to 301c being spaced apart from each other are locked to locking portions 1407a and 1407b provided on the holding means 401. The protrusions 1404 a and 1404 b formed on the holding means 401 are inserted into holes 302 d formed on the position detection member 302. Accordingly, since the position detection 302 can be positioned with respect to the holding member 401, it is possible to prevent the displacement of the holding member 401 with respect to the position detection member 302 due to the attachment method that differs depending on the examiner.

  As a result, it is possible to prevent deviation in detection of the distal end position of the treatment instrument. In addition, since it is possible to prevent a deviation in detection of the distal end position of the treatment instrument, it is possible to minimize the site where the puncture treatment is performed, so that the burden on the operator can be reduced and the subject can be reduced. Can be reduced.

  The effects obtained by the representative ones of the inventions disclosed in the present application will be briefly described as follows.

(1) A tomographic image of the tip position of the treatment instrument can be taken in real time.
(2) The burden on the operator can be reduced.
(3) The burden on the subject can be reduced.
(4) The diagnostic efficiency and the treatment efficiency can be improved.
(5) The position shift of the holding member with respect to the support member can be prevented.
(6) It is possible to prevent a shift in detection of the distal end position of the treatment instrument.

  (7) It can be easily applied to detection cameras at various arrangement positions.

  Embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment of the invention, and the repetitive description thereof is omitted.

  FIG. 1 is a schematic configuration diagram of a magnetic resonance imaging apparatus to which the present invention is applied, and FIG. 2 is an external view for explaining a schematic configuration of an embodiment. 1 and 2, 101 is a subject, 102 is a static magnetic field generating means, 103 is a gradient magnetic field generating means, 104 is an irradiation coil, 105 is a receiving coil, 106 is a signal detecting means, 107 is a signal processing means, and 108 is Display means 109, gradient magnetic field power supply, 110 RF transmission means, 111 control means, 112 position calculation means 113, detection camera, 201 reference pointer, 202 first treatment instrument, 203 an operator .

  However, the first treatment instrument 202 is an instrument generally used for I-MRI such as a puncture needle, a biopsy needle, a laparoscope, an endoscope, a catheter, a guide wire, a cryotherapy probe, and the like. It is an instrument that is used by being inserted into.

  As is apparent from FIG. 1, the magnetic resonance imaging apparatus is for obtaining, for example, a tomographic image or a three-dimensional image as a reconstructed image of the subject 101 using a known nuclear magnetic resonance phenomenon. The generating means 102, the gradient magnetic field generating means 103, the transmission system, the receiving system, the signal processing system, the wholesale control means 108, and a console not shown.

  The static magnetic field generating means 102 is composed of any one of a permanent magnet, a normal conducting magnet, and a superconducting magnet arranged in a space having a predetermined spread around the subject 101, and the body 101 is arranged around the subject 101 in the direction of its body axis or A uniform static magnetic field is generated in a direction perpendicular to the body axis of the subject.

  The gradient magnetic field generating means 103 comprises a well-known gradient magnetic field coil wound in three axial directions of X, Y, and Z and a gradient magnetic field power source 109 for magnetizing each of these coils. By magnetizing each coil of the magnetic field power supply 109, a gradient magnetic field in the three-axis directions of X, Y, and Z is applied to the subject 101.

  By applying this gradient magnetic field, a cross section for imaging and displaying the subject 101 is set. The transmission system includes an RF transmission unit 110 and a radiation coil 104, which are a well-known high-frequency oscillator and modulator (not shown), a high-frequency amplifier, and the like, and an irradiation coil 104. In order to excite nuclear magnetic resonance, a high frequency pulse output from a high frequency oscillator is amplified by a high frequency amplifier. Thereafter, the subject 101 is irradiated with a high-frequency magnetic field by supplying a high-frequency pulse to the irradiation coil 104 arranged close to the subject 101.

  The reception system includes a reception coil 105 and a signal detection means 106, and an NMR signal that is an echo signal by nuclear magnetic resonance of the nucleus of the living tissue of the subject 101 due to high-frequency electromagnetic waves irradiated from the irradiation coil 104 of the transmission system is received. The signal is received by the receiving coil 105 arranged close to the subject 101 and converted into a digital signal by the signal detecting means 106. The obtained data is output to the signal processing means 107 as collected data sampled at the timing of the pulse sequence.

  The signal processing unit 107 reconstructs a tomogram from the collected data by performing reconstruction operations such as Fourier transform and correction coefficient calculation on the collected data, and outputs the obtained tomographic image to the display unit 108 to display. A tomographic image is displayed on the display surface 108. The control unit 111 controls the application of the magnetic field to the subject 101 described above, and repeatedly applies a high-frequency magnetic field pulse that causes nuclear magnetic resonance to the atomic nucleus constituting the biological tissue of the subject 101 in a predetermined pulse sequence. It is. The control unit 111 controls the gradient magnetic field generation unit 103, the transmission system, and the reception system to control the tomographic image data collection of the subject 101 and the tomographic image reconstruction from the acquired data.

  The console is composed of a trackball, a mouse, a keyboard, or the like, and inputs control information for processing performed by the control unit 111.

  In the magnetic resonance imaging apparatus according to the embodiment of the present invention, when a tracking instruction of the first treatment instrument 202, that is, an I-MRI start instruction is input from the console, the control unit 111 controls the position calculation unit 112. Then, the position information of the first treatment instrument 202 calculated from the position of the reference pointer 201 imaged by the detection camera 113 and the position of a pointer (not shown) provided in the first treatment instrument 202 is acquired. However, the detailed configuration of the first treatment instrument 202 will be described later.

  When a tracking instruction for the first treatment instrument 202, that is, an I-MRI start instruction is input from the console, imaging parameters are input to the position calculation unit 112 from the control unit 111 (imaging parameter reception processing 120). However, the imaging parameters at this time include, for example, an initial imaging position, slice thickness, slice interval, FOV (Fie 1d of View), phase direction, and subject posture. Next, the position calculation means 112 controls the detection camera 113 to detect (photograph) each of the reference pointer 201 and pointers (reflecting spheres 301a to 301c described later) arranged on the first treatment instrument 202 (camera). Control 121), the obtained detection data is acquired (tool position data reception processing 122).

  Thereafter, the position calculation means 112 first converts the positional relationship between the obtained reference pointer 201 and the pointer of the first treatment instrument 202 with the conversion data generated at the time of initial setting. The detected position of the pointer of one treatment instrument 202 is converted into position data in the apparatus main body (position data conversion processing 123).

  However, in one embodiment, at the time of initial setting, a pivoting process for tracking the position of the distal end portion of the insertion portion of the first treatment instrument 202 causes a pointer between the pointer of the first treatment instrument 202 and the distal end position of the insertion portion. Generate conversion data indicating the relationship.

  Also, using a treatment instrument (pivoting process instrument) that has undergone an initialization phantom and a pivoting process, the position on the coordinate axis of the apparatus main body is pointed by the treatment instrument, and the position of the point is detected by the detection camera 113 Thus, conversion data for converting the coordinate position detected by the detection camera 113 into the coordinate position in the apparatus main body is generated from the relationship between the coordinate value in the apparatus coordinate system and the coordinate value detected by the detection camera 113.

  The position information of the first treatment instrument 202 converted into the position information in the coordinate system of the apparatus main body thus obtained is output from the position calculation means 112 to the control means 111 (imaging position data transmission process 124). ).

  However, when the control unit 111 and the position calculation unit 112 are realized by programs operating on different known information processing apparatuses, information is transmitted / received via a known communication interface included in each information processing apparatus.

  The control means 111 to which the position information of the distal end portion of the insertion portion of the first treatment instrument 202 is input from the position calculation means 112, the magnetic field applied to the subject 101 from the gradient magnetic field generation means 103 and the irradiation coil 104, and the reception coil The tomographic image at the distal end position of the insertion portion of the first treatment instrument 202 is reconstructed by controlling the readout magnetic field when receiving the NMR signal at 105. However, based on the distal end position of the insertion portion of the first treatment instrument 202, the control of the imaging section including the distal end position is a well-known control.

  In addition to the cross section orthogonal to the extending direction of the insertion portion, the photographing cross section at this time, for example, a photographing cross section that intersects the extending direction of the insertion portion and the tip position at a preset angle, An imaging section or the like that is parallel to the extending direction and has an enlarged tip portion may be used.

  This tomographic image is displayed on the display means 108 as the tip position of the insertion portion of the first treatment instrument 202, for example, the center position of the display surface of the display means 108. By sequentially collecting the tomographic images at the distal end position of the insertion portion of the first treatment instrument 202 described above in real time, the operator 203 can move the distal end position of the insertion portion of the first treatment instrument 202 at the time of I-MRI. Examination or treatment can be performed while observing a tomographic image.

  FIG. 3 is a schematic configuration explanatory diagram of the holding member 401, and FIG. 4 is a schematic configuration explanatory diagram of the position detection member 302. As shown in FIG. The position detection member 302 is attached to the first holding member 401, and the holding member 401 is attached to the treatment instrument 202, whereby the holding member 401 and the position detection member 302 are attached to the processing instrument 202.

  In FIG. 3, the first holding member 401 has a symmetrical shape when viewed from the direction A in FIG. 3. A plate-like member 1400 is formed at the center, and support portions 1402a and 1402b on the side surfaces in the plane direction of the plate-like member 1400 are formed.

  The support 1402a is formed with a column 1404a that protrudes in the planar direction of the plate-like member 1400. Furthermore, two locking portions 1407 a that protrude in the plane direction of the plate-like member 1400 and that face each other in a direction substantially perpendicular to the plane of the plate-like member 1400 are formed on the support portion 1402 a. A recess 1405a is formed between the two locking portions 1407a.

  The support portion 1402b has the same shape as the support portion 1402a, and a support column 1404b that protrudes in the plane direction of the plate-like member 1400 is formed. The support portion 1402b is formed with two locking portions 1407b that project in the planar direction of the plate-like member 1400 and face each other in a direction substantially perpendicular to the plane of the plate-like member 1400. A recess 1405b is formed between the two locking portions 1407b.

  The first holding member 401 is fixed to the treatment instrument 202 by a fixing method corresponding to the shape of the treatment instrument 202. For example, in the case of the treatment instrument 202 having protrusions and accessories such as a cable, it is necessary to perform corresponding fixing so as not to impair the original function of the treatment instrument. In the case of a bar-like or needle-like treatment instrument, screw-type fixing is also possible.

  Next, in FIG. 4, the position detection member 302 is formed with three extension portions 302 a, 302 b, and 302 c, and the reflection spheres 301 a, 301 b, and 301 c are formed in the vicinity of the tip ends of these extensions 302 a to 302 b. It is attached. A hole 302d is formed near the center of the position detection member 302. The column 1404a or 1404b of the holding member 401 is inserted into the hole 302d. Further, the extension 302c is inserted between the two locking portions 1407a or 1407b of the holding member 401. Then, the position detection member 302 is fixed to the holding member 401 with a non-magnetic screw or the like.

  FIG. 5 is a schematic perspective view of a state in which the first holding member 401 to which the second holding member 302 is attached is attached to the treatment instrument 202. The treatment instrument 202 is shown in a simplified manner for convenience of illustration.

  The example shown in FIG. 5 is an example in which the position detection member 302 is attached to the support portion 1402a on one side of the holding member 401, but the position detection member 302 is attached to the support portion 1402b on one side of the holding member 401. It is possible to replace it.

  The reason why the second holding member 302 can be replaced with both the supporting portions 1402a and 1402b located on the opposite side is that the holding member 302 can be attached only to one side. Then, the cameras for detecting the reflection spheres 301a to 301c are limited to those arranged on a specific side. If detection is possible from cameras arranged on different sides, it is possible to detect from the cameras at positions where it is easy to detect the positions of the treatment instruments at various positions.

  When the second holding member 302 can be disposed only on one side, it is also conceivable to rotate the treatment instrument to which the holding member is attached by 180 degrees. However, depending on the treatment instrument, there are cases where the treatment instrument has a protrusion or rotation of the treatment instrument is difficult due to an accessory such as a cable.

  Further, for example, in a treatment instrument such as an endoscope or a microscope, it is difficult to rotate the treatment instrument up and down when the display screen for observing a living body has a vertical direction.

  Therefore, the present invention is configured such that the position detection member 302 can be replaced at both positions of the support portions 1402a and 1402b on one side of the holding member 401.

  FIG. 6 is a diagram illustrating a state in which the position detection member 302 is attached to both sides of the support portions 1402a and 1402b. This figure clearly shows that the position detection member 302 can be attached to both sides of the holding member 401. In actual use, the position detection member 302 is attached to both sides of the holding member 401. Few.

  FIG. 7 is a view of the state in which the holding member 401, the position detection member 302, and the treatment instrument 202 are viewed from the direction B in FIG.

  In the above-described example, the position detection member 302 is attached to the holding member 401 at two positions (1402a and 1402b) facing each other. However, the two positions need to be positions facing each other. There is no.

  Further, the position detecting member 302 can be attached to three or more positions of the holding member 401.

  In the above-described example, the holding member 401 and the position detection member 302 are separate members. However, the position detection member 302 is formed on both sides as shown in FIG. You can also However, in this case, the reflection balls 301a to 301c are configured to be detachable from the holding member 302 and can be attached to either one of them.

  In addition, the treatment instrument, the holding member, and the position detection member are made of a nonmagnetic material such as plastic or vinyl chloride that does not affect the MR image even when used in the magnetic field of the MRI apparatus. Furthermore, the use of nonmagnetic materials for other members can also prevent deterioration in the image quality of tomographic images. Furthermore, it goes without saying that the treatment instrument is formed of a safe material even when it comes into contact with the human body.

1 is a schematic configuration diagram of a magnetic resonance imaging apparatus to which the present invention is applied. 1 is a schematic configuration diagram of a magnetic resonance imaging apparatus in an embodiment of the present invention. It is a schematic block diagram of the holding member used for the magnetic resonance imaging apparatus of embodiment of this invention. It is a schematic block diagram of the member for position detection used for the magnetic resonance imaging apparatus of embodiment of this invention. It is a schematic perspective view of the state which attached the holding member used for the magnetic resonance imaging apparatus of embodiment of this invention to the treatment instrument. It is a schematic perspective view of the state which attached the holding member used for the magnetic resonance imaging apparatus of embodiment of this invention to the treatment instrument. It is the schematic of the state which attached the holding member used for the magnetic resonance imaging apparatus of embodiment of this invention to the treatment instrument.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Subject 102 Static magnetic field generation means 103 Gradient magnetic field generation means 104 Irradiation coil 105 Reception coil 106 Signal detection means 107 Signal processing means 108 Display means 109 Gradient magnetic field power supply 110 RF transmission means 111 Control means 112 Position calculation means 113 Detection camera 201 Reference Pointer 202 Treatment instrument 203 Operators 301a to 301c First to third reflecting spheres 302 Position detecting member 401 Holding member 1400 Plate member 1402a Supporting part 1402b Supporting part 1404a Supporting pillar 1404b Supporting pillar 1407 Locking part

Claims (5)

In a treatment instrument for image guide therapy for a magnetic resonance imaging apparatus that takes a tomographic image of a subject while detecting the position of the treatment instrument and monitoring the detected treatment instrument,
A position detecting member for detecting the position of the treatment instrument;
A holding member attached to the treatment instrument, having two or more support portions for fixing and supporting the position detection member on the treatment instrument;
An image-guided treatment instrument comprising:   2. The treatment apparatus for image guide therapy according to claim 1, wherein the treatment instrument is a treatment instrument for acquiring an observation image such as a laparoscope or an endoscope. In an image-guided treatment instrument for a magnetic resonance imaging apparatus that detects a tomographic image of a subject while detecting the position of the insertion member inserted into the body of the subject and monitoring the detected insertion member,
Three or more bright spot means, a position detecting member for supporting the bright spot means at a distance, and two or more fixing positions for holding and fixing the position detecting member, the insertion member A holding member attached to the
An image-guided treatment instrument comprising:   The treatment apparatus for image guide treatment according to claim 3, wherein two fixing positions of the holding member for fixing the position detection member are positions facing each other. A static magnetic field generating means for generating a static magnetic field in a space for accommodating the subject; a gradient magnetic field generating means for generating a gradient magnetic field in the space; and an irradiating means for irradiating a high frequency magnetic field for generating magnetic resonance in the subject; A receiving means for detecting and receiving an NMR signal from the subject by magnetic resonance, a reconstruction means for reconstructing an image based on the NMR signal received by the receiving means and displaying it on the display means, and in the subject In a magnetic resonance imaging apparatus having detection means for detecting the position and direction of a treatment instrument that is inserted and performs a desired treatment,
A position detection member for detecting the position of the treatment instrument, a support member for fixing and supporting the position detection member on the treatment instrument, and a holding member attached to the treatment instrument;
Means for controlling the gradient magnetic field generating means and the irradiating means based on the position of the position detecting member detected by the detecting means, and collecting a reconstructed image of the imaging surface including the distal end position of the treatment instrument; ,
A magnetic resonance imaging apparatus for taking a tomographic image of a subject while monitoring the detected treatment instrument.

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