JP2003088509A - Puncture auxiliary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a puncture auxiliary tool hardly arrested in three- dimensional positioning and to realize a puncture auxiliary tool allowing a three-dimensional positioning in sideward puncture to a subject. SOLUTION: This puncture auxiliary tool comprises an emitter support part 610 for supporting three emitters 612 so that they form a triangle, an arm part 620 protruded from the emitter support part to have a predetermined geometric relation to the plane of the triangle, and a puncture needle insert hole 626 provided orthogonally to the protruding direction of the arm part in the end part opposite to the emitter support part side of the arm part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a puncture assisting device, and more particularly to a puncture assisting device for performing a puncture on an object housed in a photographing space in parallel with photographing.

[0002]

2. Description of the Related Art Magnetic resonance imaging (MRI: Magneti)
c Resonance Imaging)
An object to be imaged is carried into an internal space of a magnet system, that is, an imaging space in which a static magnetic field is formed, and a gradient magnetic field and a high frequency magnetic field are applied to generate magnetic resonance signals from spins in the object. , Reconstruct an image based on the received signal.

A livestock (biopsy) about an object
When performing psy), magnetic resonance imaging is performed in parallel with that, and the operator performs a puncture while observing the state of entry of the living needle into the body on the displayed tomographic image.

In order to photograph a tomographic image including the puncture needle, detection of the three-dimensional position of the puncture needle in the photographing space, that is, three-dimensional position of the puncture needle (position)
ing) is performed.

A lancing aid is used to enable three-dimensional positioning. The puncture assisting device has three light emitters respectively provided at positions corresponding to the vertices of the triangle, and a puncture needle insertion hole provided at a position corresponding to the center of the triangle perpendicular to the surface of the triangle.

The three-dimensional position of the light spot generated by the light emitter is measured by, for example, triangulation or the like through a plurality of light receivers provided above the photographing space, and the position and inclination of a triangular surface formed by the three light spots. Is required. Then, the position and the inclination of the surface normal at the center of the triangle are set as the position and direction of the puncture needle, and the slice position including the position is specified to take a tomographic image. Specifying the slice position based on the three-dimensional positioning of the puncture needle is also called navigation.

[0007]

The puncture assisting device having the insertion hole for the puncture needle at the center of the triangle is apt to block the light emitted from the light emitter by the operator's hand or face during use. When the light is blocked, the three-dimensional position of the light spot cannot be measured, and the position of the puncture needle becomes unknown.

[0008] Also, when trying to puncture the object from the side,
Since the triangular surface faces sideways, it becomes impossible to observe the light spot from above, and the three-dimensional positioning of the puncture needle becomes impossible. Therefore, an object of the present invention is to realize a puncture needle assisting device in which three-dimensional positioning is less likely to be hindered.
Another object is to realize a puncture assisting device capable of three-dimensional positioning when puncturing a target from the side.

[0009]

According to the present invention for solving the above-mentioned problems, a luminous body support portion for supporting three luminous bodies in a relationship in which they form a triangle, and a surface of the triangle. In a direction that intersects with the protruding direction of the arm portion at the arm portion protruding from the light emitter support portion in a predetermined geometrical relationship, and at the end portion of the arm portion opposite to the light emitter support portion side. And a puncture needle insertion hole provided therein.

According to the present invention, the luminous body support portion for supporting the three luminous bodies in the relationship that they form a triangle,
An arm projecting from the light emitter support is provided in a predetermined geometrical relationship with respect to the triangular surface, and the arm projecting direction at the end of the arm opposite to the light emitter support is Since the puncture needle insertion hole is provided in the intersecting direction, the luminescent body and the puncture needle are separated from each other, which makes it difficult for the light of the luminescent body to be blocked during puncturing.

It is preferable that the projecting direction of the arm portion is substantially parallel to the triangular surface in that the light emitter and the puncture needle are separated from each other in the direction substantially parallel to the triangular surface. It is preferable that the protruding direction of the arm portion is substantially perpendicular to the triangular surface in that the light emitter and the puncture needle are separated from each other in the direction substantially perpendicular to the triangular surface.

It is preferable that the arm portion is attachable to and detachable from the luminous body support portion in order to make the combination of the arm portion and the luminous body support portion variable. It is preferable that the arm can be selected from a plurality of arms having different lengths in order to change the distance between the light emitter and the puncture needle.

It is preferable that the arm portion can be selected from a plurality of arm portions having different bending angles from the viewpoint of changing the puncture angle of the puncture needle. It is preferable that the arm portion is capable of expanding and contracting in the protruding direction from the viewpoint of adjusting the distance between the light emitter and the puncture needle.

It is preferable that the arm portion is bendable in terms of adjusting the puncture angle of the puncture needle.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment. As a preliminary description before describing the embodiments of the present invention, a magnetic resonance imaging apparatus that captures a tomographic image of an object in parallel with puncturing will be described.

FIG. 1 shows a block (b) of a magnetic resonance imaging apparatus.
lock) diagram is shown. As shown in the figure, the apparatus is a magnet system 100.
Have. The magnet system 100 includes a pair of main magnetic field coil units 102 and a pair of gradient coil units 106.
And an RF (radio frequency) coil unit 108. Each of these coil portions has a substantially cylindrical shape and is arranged coaxially with each other.

The main magnetic field coil section 102 and the gradient coil section 106 are opposed to each other with a predetermined distance in the axial direction. A space is formed between the facing pairs. The center C of this space is the center of the magnet system 100, that is, the magnet center.
er). A three-dimensional area having a predetermined radius centered on the magnet center C is the imaging space. This shooting space is a space open to the outside.

In the shooting space of the magnet system 100,
The object 1 to be imaged is mounted on a cradle 500 and is carried in and out by a carrying unit (not shown). The imaging region (for example, abdomen) of the target 1 is the RF coil unit 1.
It is housed in 08.

The main magnetic field coil section 102 forms a static magnetic field in the imaging space. The direction of the static magnetic field is substantially parallel to the direction of the body axis of the target 1. That is, a so-called horizontal magnetic field is formed. The main magnetic field coil unit 102 is composed of, for example, a superconducting coil.

The gradient coil unit 106 produces three gradient magnetic fields for imparting gradients to the static magnetic field strength in the directions of three axes perpendicular to each other, that is, a slice axis, a phase axis and a frequency axis.

When the mutually perpendicular coordinate axes in the static magnetic field space are x, y, and z, any axis can be a slice axis. In that case, one of the remaining two axes is the phase axis and the other is the frequency axis. Further, the slice axis, the phase axis, and the frequency axis can be made to have arbitrary inclinations with respect to the x, y, and z axes while maintaining the verticality among them. In this apparatus, the direction of the body axis of the target 1 is the z-axis direction.

The gradient magnetic field in the slice axis direction is also called a slice gradient magnetic field. The gradient magnetic field in the phase axis direction is also referred to as a phase encode gradient magnetic field. Read out the gradient magnetic field in the frequency axis direction.
t) Also called a gradient magnetic field. In order to enable the generation of such a gradient magnetic field, the gradient coil unit 106 has three systems of gradient coils (not shown). Hereinafter, the gradient magnetic field is also simply referred to as a gradient.

The RF coil unit 108 is used for the object 1 in the static magnetic field space.
A high-frequency magnetic field is generated to excite spins in the human body. In the following, RF is used to form a high frequency magnetic field.
It is also called the transmission of an excitation signal. The RF excitation signal is also called an RF pulse. The RF coil unit 108 also receives an electromagnetic wave generated by the excited spin, that is, a magnetic resonance signal.

The gradient coil unit 106 includes a gradient drive unit 130.
Are connected. The gradient driving unit 130 is the gradient coil unit 1.
A drive signal is given to 06 to generate a gradient magnetic field. The gradient drive unit 130 has three-system drive circuits (not shown) corresponding to the three-system gradient coils in the gradient coil unit 106.

The RF coil unit 108 includes an RF drive unit 140.
Are connected. The RF driving unit 140 is the RF coil unit 1.
A drive signal is given to 08 to transmit an RF pulse to excite spins in the body of the subject 1.

The RF coil unit 108 stores data (dat
a) The collecting unit 150 is connected. Data collection unit 15
0 captures the reception signal received by the RF coil unit 108 by sampling and collects it as digital data.

A control unit 160 is connected to the gradient drive unit 130, the RF drive unit 140 and the data collection unit 150. The controller 160 controls the gradient driver 130 and the data collector 150 to perform imaging.

The control unit 160 is, for example, a computer (c
computer) and the like. Control unit 160
Has a memory (not shown). The memory stores a program for the control unit 160 and various data. The function of the control unit 160 is realized by the computer executing the program stored in the memory.

The output side of the data collecting section 150 is connected to the data processing section 170. The data collected by the data collection unit 150 is input to the data processing unit 170. The data processing unit 170 is configured using, for example, a computer or the like. The data processing unit 170 has a memory (not shown). The memory stores programs for the data processing unit 170 and various data.

The data processing section 170 is connected to the control section 160. The data processing unit 170 is above the control unit 160 and controls it. The function of this apparatus is realized by the data processing unit 170 executing a program stored in the memory.

The data processing section 170 includes a data collection section 15
0 stores the collected data in memory. A data space is formed in the memory. This data space constitutes a two-dimensional Fourier space. Hereinafter, the Fourier space is also referred to as k-space. The data processing unit 170 performs a two-dimensional inverse flow on the k-space data.
The tomographic image of the target 1 is reconstructed by Rie conversion.

A light spot detection signal is also input from the light spot detector 120 to the data processor 170. Light spot detector 1
20 is provided as an accessory to the magnet system 100.

The light spot detector 120 has a plurality of light spot detectors. Each light spot detector detects the direction of each of three light spots generated by three light emitters provided in the lancing aid described later.

The data processing section 170 calculates the three-dimensional positions of the three light spots by triangulation or the like based on the plurality of light spot detection signals, that is, the plurality of light direction detection signals,
The three-dimensional position and tilt of a plane where three light spots exist at the same time are calculated. The calculation method is the same as the conventional one.

The three-dimensional positions of the three light spots and the three-dimensional position and inclination of the plane on which they simultaneously exist serve as reference positions and directions for specifying the three-dimensional position and direction of the puncture needle, which will be described later. .

Since the geometrical relationship of the puncture needle with respect to the three light emitters is a predetermined fixed relationship, if the reference position and direction are determined, the three-dimensional position and direction of the puncture needle can be specified based on the reference position and direction. can do.

Then, the position and inclination of the slice for tomographic image photography are determined in accordance with the specified three-dimensional position and direction of the puncture needle. The operation of specifying the three-dimensional position and direction of the puncture needle to determine the position and inclination of the slice in this manner is also called navigation. Less than,
The term "position" is intended to include not only position but also direction or tilt.

A display unit 180 and an operation unit 190 are connected to the data processing unit 170. The display unit 180 includes a graphic display.
ay) and the like. The operation unit 190 includes a keyboard having a pointing device and the like.

The display section 180 displays the reconstructed image and various information output from the data processing section 170. The operation unit 190 is operated by the user and inputs various commands and information to the data processing unit 170. A user interactively operates the apparatus through the display unit 180 and the operation unit 190.

The data processing section 170 also includes a display section 1.
82 is connected. The display unit 182 is provided as an accessory to the magnet system 100. The display unit 182 includes a graphic display or the like.
The display unit 182 displays the reconstructed image output from the data processing unit 170.

2 and 3, the magnet system 1 is shown.
00, the display unit 182, and the light spot detection unit 120 are schematically shown. 2 is a side view, and FIG. 3 is a sectional view taken along line AA of FIG.

As shown in the figure, the magnet system 1
00 has a front structure 202 and a rear structure 204.
The front structure 202 and the rear structure 204 include one of the pair of main magnetic field coil units 102 and the pair of gradient coil units 10.
6 and one of the pair of main magnetic field coil sections 102 and the other of the pair of gradient coil sections 106 are respectively incorporated.

The front structure 202 and the rear structure 204 are
The upper portion is connected by a bridge 206, and the lower portion is integrated by a table 208. Cradle 5 on top of table 208
00, and the target 1 is mounted on it. Target 1
An RF coil unit 108 is attached to the.

The display unit 182 is attached to the bridge 206. As the display unit 182, for example, LCD (Li
Quid Crystal Display) or the like is used. The light spot detection unit 120 is attached inside the bridge 206 so as to look down on the imaging space.

The imaging operation of the magnetic resonance imaging apparatus will be described.
FIG. 4 shows an example of a pulse sequence for acquiring a magnetic resonance signal executed by the present apparatus. This pulse sequence has a spin echo (spi)
The pulse sequence for obtaining the signal n echo), that is, the pulse sequence by the spin echo method.

(1) in the figure is an RF pulse, that is, 90 °
A sequence of pulses and 180 ° pulses,
(2), (3), (4) and (5) are sequences of the slice gradient Gs, the phase encode gradient Gp, the readout gradient Gr and the spin echo MR, respectively. The 90 ° pulse and the 180 ° pulse are represented by the central value. The pulse sequence progresses from left to right along the time axis t.

As shown in the figure, 90 ° pulse and 1
The 80 ° pulse provides 90 ° and 180 ° excitation of the spins, respectively. 90 ° excitation and 180 °
Upon excitation, slice gradients Gs1 and Gs3, respectively
Is applied and selective excitation is performed for a predetermined slice.

Between the 90 ° excitation and the 180 ° excitation, phase encoding in the phase axis direction by the phase encoding gradient Gp and dephasing in the frequency axis direction by the readout gradient Gr1 are performed.

After excitation by 180 °, readout gradient Gr2
A spin echo MR is generated by the rephasing by the. The spin echo MR is an RF signal having a symmetrical waveform with respect to the echo center. The echo center occurs TE (echo time) after 90 ° excitation. The spin echo MR is collected by the data collection unit 150 as view data.

Such a pulse sequence has a period TR.
For example, 64 to 2 in (repetition time)
Repeated 56 times. The phase encode gradient Gp in the phase axis direction is changed each time it is repeated. The broken line conceptually represents the sequential change of the phase encode gradient Gp. by this,
View data of 64-256 views having different phase encoding in the phase axis direction can be obtained. The view data obtained in this way is collected in the k space of the memory of the data processing unit 170.

By performing the two-dimensional inverse Fourier transform on the k-space data, the two-dimensional image data in the real space, that is, the reconstructed image is obtained. This image is displayed on the display unit 180
Is displayed.

FIG. 5 shows another example of the pulse sequence for magnetic resonance signal acquisition executed by this apparatus. This pulse sequence has a gradient echo.
Echo) is a pulse sequence for obtaining an echo, that is, a pulse sequence by a gradient echo method.

FIG. 1A shows a sequence of RF pulses, that is, 90 ° pulses, and (2), (3), (4) and (5) respectively show a slice gradient Gs, a phase encode gradient Gp and a readout. It is a sequence of gradient Gr and gradient echo MR. The 90 ° pulse is represented by the center value. The pulse sequence progresses from left to right along the time axis t.

As shown in the figure, 90 ° excitation of spin is performed by 90 ° pulse. A slice gradient Gs1 is applied at the time of 90 ° excitation, and selective excitation is performed for a predetermined slice. After the 90 ° excitation, phase encoding in the phase axis direction is performed by the phase encoding gradient Gp.

After that, dephasing in the frequency axis direction by the readout gradient Gr1 is performed, and then gradient echo MR is generated by rephasing by the readout gradient Gr2 that is performed next.

The gradient echo MR is an RF signal having a symmetrical waveform with respect to the echo center. The echo center occurs TE after 90 ° excitation. The gradient echo MR is collected by the data collection unit 150 as view data.

Such a pulse sequence has a period TR.
Is repeated 64 to 256 times, for example. The phase encode gradient Gp in the phase axis direction is changed each time it is repeated. The broken line conceptually represents the sequential change of the phase encode gradient Gp. As a result, view data of 64-256 views having different phase encoding in the phase axis direction can be obtained. The view data thus obtained is used as the data processing unit 17
Collected in k-space of 0 memory.

By performing the two-dimensional inverse Fourier transform on the k-space data, the two-dimensional image data in the real space, that is, the reconstructed image can be obtained. This image is displayed on the display unit 180
Is displayed.

Imaging is not limited to the spin echo method or the gradient echo method, but the fast spin echo (Fas
t Spin Echo) method and echo planer (Ech)
Other suitable techniques such as the oPlanar method may be used.

When the subject 1 is to be lived in parallel with the radiography, the operator 300 puts himself in the space between the front structure 202 and the rear structure 204 to perform puncture, as shown in FIG. R
The F coil portion 108 is appropriately provided with an opening for puncturing, and puncturing is performed through the opening. The operator 300 advances the puncture while confirming the positions of the affected part and the needle 400 in the body of the target 1 by the image displayed on the display unit 182. The needle 400 is attached to the lancing aid 600.

7 and 8 are schematic views showing a structural example and a usage state of the puncture assisting device 600, respectively. This device is an example of an embodiment of the present invention. The configuration of the present instrument shows an example of an embodiment relating to the instrument of the present invention.

As shown in the figure, the puncture assisting device 600
Consists of a light emitter support 610 and an arm 620. The light emitter support 610 is an example of an embodiment of the light emitter support in the present invention. The arm 620 is an example of an embodiment of the arm in the present invention.

The light emitter support 610 has a three-pronged structure.
Each branch of the trifurcated structure extends radially at equal angular intervals. A light emitter 612 is provided on the upper surface of the end of each branch. The light emitter 612 is a point light source that emits light in substantially all directions, such as a light emitting diode (LED: Light Em).
Itating Diode) or the like is used. At least one of the three light emitters 612 has a light emission mode different from the others due to light modulation or the like, and is distinguishable from the others.

The three light emitters 612 are the light emitter support portions 61.
It is provided at a position equidistant from the center of the trident structure of 0. As a result, the triangle formed by connecting the three light emitters 612 with a virtual line becomes an equilateral triangle. Hereinafter, the triangle formed by connecting the three light emitters 612 with a virtual line is also simply referred to as the triangle of the light emitter 612. The distinguishability of at least one light emitter 612 from another allows the triangle to identify its orientation.

The three light emitters 612 do not need to be provided at positions equidistant from the center of the three-pronged structure of the light emitter support 610, and any one of them may be unequal distance or unequal distance. . Therefore, the triangle of the light emitter 612 is not limited to an equilateral triangle, but may be an isosceles triangle or an isosceles triangle. An example of an equilateral triangle will be described below, but the same applies to the case of an isosceles triangle or an isosceles triangle.

The light emitter support 610 is attached to one end of the arm 620. At the portion of the arm 620 to which the light emitter support 610 is attached, the light emitter support 6
22 is formed. The luminous body support portion receiver 622 has a shallow bowl-like structure with a bottom. At the edge of the bowl-shaped structure, three grooves corresponding to the three branches of the trifurcated structure of the light emitter support 610 are formed. The light emitter support 610 and the arm 620 are integrated by fitting these grooves and branches.

In the integrated state, the arm 620 is parallel to one branch of the light emitter support 610. For example, the light emitter 612 provided on this branch is distinguishable from the other two. The arm 620 is also parallel to the triangular surface of the light emitter 612. The middle part of the arm 620 is a part that the user holds with hand when using the present device.

It should be noted that the arms 620 and one branch of the light emitter support 610 do not have to be parallel to each other, and may have a predetermined fixed geometrical relationship. The same applies to the triangular surface of the light emitter 612. Hereinafter, parallel examples will be described, but the same applies to other fixed relationships.

A needle receiver 624 is provided at the other end of the arm 620.
Are formed. An insertion hole 626 is formed in the needle receiver 624, and the puncture needle 400 is inserted into the insertion hole 626. The insertion hole 626 is an example of an embodiment of the puncture needle insertion hole in the present invention.

The central axis of the insertion hole 626 is perpendicular to the central axis of the arm 620. The plane to which both central axes belong is perpendicular to the triangular surface of the light emitting body 612. The insertion hole 62
The central axis of 6 need not be perpendicular to the central axis of arm 620 and may be at a predetermined constant angle. The same applies to the plane to which both central axes belong. Hereinafter, a vertical example will be described, but the same applies to other angles.

The light emitter support 610 and the arm 620 are inseparably integrated by adhesion or the like. Alternatively, as shown in FIG. 9, both may be separable.
In the case of being separable, for example, as shown in FIG. 10, it is possible to prepare a plurality of arm portions 620 having different lengths in advance and replace them as needed for use. If the arms cannot be separated, the arms 620 may be expandable.

By configuring the puncture assisting device 600 as described above, the light emitter 612 and the needle receiver 624 are separated from each other. Therefore, when the needle 400 is inserted into the needle receiver 624 to puncture the target 1, the light of the light emitting body 612 is less likely to be blocked by the operator's 300 hand or head.

11 and 12 show a puncture assisting device 60.
0 shows another configuration example and a usage state, respectively, by a schematic diagram. This device is an example of an embodiment of the present invention. The configuration of the present instrument shows an example of an embodiment relating to the instrument of the present invention.

In the figure, the same components as those shown in FIG. 7 are designated by the same reference numerals and the description thereof will be omitted. As shown in the figure, the puncture assisting device 600 includes a light emitter support 610 and an arm 620 ′.

The light emitter support 610 is attached to one end of the arm 620 '. A light emitter support receiver 622 'is formed in a portion of the arm 620' to which the light emitter support 610 is attached. Light emitter support 62
2'has a shallow bowl-like structure with a bottom. At the edge of the bowl-shaped structure, three grooves corresponding to the three branches of the trifurcated structure of the light emitter support 610 are formed. The light emitter support 610 and the arm 620 ′ are integrated by fitting these grooves and branches.

In the integrated state, the arm 620 'is perpendicular to the triangular surface of the light emitter 612. Also, the arm 62
The central axis of 0 ′ passes through the center of the triangle of the light emitter 612. The middle part of the arm 620 ′ is a part that the user grips with hand when using this device.

The central axis of the arm 620 'is the light emitter 61.
It does not have to be perpendicular to the plane of the two triangles, but may be a fixed fixed geometric relationship. The same applies to the position where the central axis passes. Hereinafter, an example perpendicular to the center of the triangle will be described, but the same applies to other fixed relationships.

The needle receiver 62 is provided at the other end of the arm 620 '.
4'is formed. The insertion hole 62 is formed in the needle receiver 624 '.
6'is perforated, and the puncture needle 400 is inserted into the insertion hole 626 '.

The central axis of the insertion hole 626 'is perpendicular to the central axis of the arm portion 620'. The plane to which both central axes belong is
It is perpendicular to the triangular surface of the light emitter 612 and parallel to one branch of the light emitter support 610. For example, the light emitter 612 provided on this branch is distinguishable from the other two.

The central axis of the insertion hole 626 'is the arm 62.
It may be a predetermined constant angle without needing to be perpendicular to the central axis of 0 '. The same applies to the plane to which both central axes belong. Hereinafter, a vertical example will be described, but the same applies to other angles.

The light emitter support 610 and the arm 620 'are inseparably integrated by adhesion or the like. Alternatively,
Both may be separable as shown in FIG. In the case of being separable, for example, as shown in FIG. 14, a plurality of arm portions 620 ′ having different lengths can be prepared in advance, and can be used by exchanging them if necessary. Alternatively,
As shown in FIG. 15, a bent arm 620 ′ may be prepared and used properly according to the purpose. In addition, a plurality of arms having different bending angles may be prepared and used according to the purpose. Light emitter support 610 and arm 6
Needless to say, the arm 620 may be expandable / contractible if 20 ′ is inseparable.

By configuring the puncture assisting device 600 as described above, the light emitter 612 and the needle receiver 624 'are separated from each other. Therefore, when the needle 400 is inserted into the needle receiver 624 ′ to puncture the target 1, the light of the light emitter 612 is less likely to be blocked by the operator's 300 hand or head. Further, even when the object 1 is punctured from the side, the light spot of the light emitting body 612 can be detected by the light spot detection unit 120, so that puncture from the side, which has been impossible in the past, becomes possible.

FIG. 16 shows a flow chart of the operation when magnetic resonance imaging is performed in parallel with the puncture using the puncture assisting device 600. As shown in the figure, at step 702, navigation is started.

As a result, in step 704, the light spot position is detected. That is, based on the signal input from the light spot detection unit 120 by the data processing unit 170,
The three-dimensional positions of the three light spots generated by the light emitter 612 of the lancing aid 600 are obtained.

Next, in step 706, the position and orientation of the puncture needle is calculated. That is, the data processing unit 1
70 calculates the three-dimensional position and orientation of the needle 400 having a predetermined geometrical relationship with respect to these three light spots, that is, the three-dimensional positions of the triangles.

Next, in step 708, slice determination is performed according to the position and orientation of the puncture needle. That is, the data processing unit 170 determines a slice that matches the three-dimensional position and orientation of the needle 400.

Next, in step 710, scanning is performed. That is, the data processing unit 170 makes full use of the gradient driving unit 130 and the RF driving unit 140 through the control unit 160 to scan the slice.

Next, in step 712, image reconstruction and display are performed. That is, the data processing unit 170 reconstructs an image based on the scan data and displays it on the display unit 180 and the display unit 182. The display image includes the image of the needle 400. The operator 300 performs the puncture while confirming the position of the needle 400 by the image displayed on the display unit 182.

Based on the determination in step 714, steps 704 to 712 until the puncture work is completed.
The operation up to is repeated. The above is an example of capturing a tomographic image by a magnetic resonance imaging apparatus in parallel with the puncture, but the apparatus for capturing a tomographic image is not limited to the magnetic resonance imaging apparatus, and for example, X-ray CT (Computed) Tomog
It is needless to say that it may be performed using an appropriate photographing device such as a raphy) device.

[0090]

As described in detail above, according to the present invention, it is possible to realize a puncture needle assisting tool in which three-dimensional positioning is not easily disturbed. Further, it is possible to realize a puncture assisting device capable of performing three-dimensional positioning when puncturing a target from the side.

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic resonance imaging apparatus.

FIG. 2 is a schematic diagram showing the configuration of a magnet system.

FIG. 3 is a schematic diagram showing the configuration of a magnet system.

FIG. 4 is a diagram showing an example of a pulse sequence for magnetic resonance imaging.

FIG. 5 is a diagram showing an example of a pulse sequence for magnetic resonance imaging.

FIG. 6 is a schematic view showing a state during puncturing.

FIG. 7 is a schematic diagram showing a configuration of a puncture assisting device.

FIG. 8 is a schematic diagram showing a configuration of a puncture assisting device.

FIG. 9 is a schematic view showing a configuration of a puncture assisting device.

FIG. 10 is a schematic view showing an arm configuration of a puncture assisting device.

FIG. 11 is a schematic view showing the structure of a puncture assisting device.

FIG. 12 is a schematic view showing a configuration of a puncture assisting device.

FIG. 13 is a schematic diagram showing the configuration of a puncture assisting device.

FIG. 14 is a schematic view showing an arm structure of a puncture assisting device.

FIG. 15 is a schematic view showing an arm structure of a puncture assisting device.

FIG. 16 is a flow chart when magnetic resonance imaging is performed in parallel with puncturing.

[Explanation of symbols]

600 puncture aid 610 Light emitter support 612 luminous body 620, 620 'arm 622,622 'Light emitter support receiver 624, 624 'needle receiver 626, 626 'insertion hole

Continued front page    (72) Inventor Shigehiro Morikawa             Shiga Medical University, Seta Tsukiwa-cho, Otsu City, Shiga Prefecture             Center for Molecular Neuroscience (72) Inventor Wiswaner Tan Seshan             127, 4-7 Asahigaoka, Hino City, Tokyo             GE Yokogawa Medical System Co., Ltd.             Within (72) Inventor Tetsuji Tsukamoto             127, 4-7 Asahigaoka, Hino City, Tokyo             GE Yokogawa Medical System Co., Ltd.             Within F-term (reference) 4C060 FF27 MM24                 4C096 AA20 AB50 AD19 FC20

Claims (8)

[Claims] 1. A light emitter support that respectively supports three light emitters in a relationship that they form a triangle, and a protrusion from the light emitter support in a predetermined geometric relationship with respect to the plane of the triangle. And a puncture needle insertion hole provided in a direction intersecting a protruding direction of the arm portion at an end portion of the arm portion opposite to the light emitter support portion side. A puncture aid. 2. The puncture assisting device according to claim 1, wherein the protruding direction of the arm portion is substantially parallel to the triangular surface. 3. The puncture assisting device according to claim 1, wherein the protruding direction of the arm portion is substantially perpendicular to the triangular surface. 4. The lancing aid according to claim 1, wherein the arm is detachable from the light emitter support. 5. The puncture assist device according to claim 4, wherein the arm portion can be selected from a plurality of arm portions having different lengths. 6. The arm portion can be selected from a plurality of arm portions having different bending angles.
The puncture assisting device according to. 7. The puncture assisting device according to claim 1, wherein the arm portion is extendable and contractable in the protruding direction. 8. The puncture assisting device according to claim 1, wherein the arm is bendable.