JP2816840B2 - A diagnostic and therapeutic marker for a magnetic resonance image diagnostic apparatus or a CT apparatus. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic resonance image diagnostic apparatus or a diagnostic / therapeutic marker for a CT apparatus which can be used for positioning or diagnosing a region of interest of a subject photographed by a magnetic resonance image diagnostic apparatus or a CT apparatus. It is about mosquitoes.

[0002]

2. Description of the Related Art As a conventional technique, a magnetic resonance image diagnostic apparatus or a CT apparatus is used to photograph a brain surface of a subject or other parts to be diagnosed, and to accurately detect an internal structure or a lesion of the subject to accurately diagnose the medical image. The cavity is formed between the laminated plastics for the purpose of precisely positioning the treatment site of the subject, and the cavity is filled with a liquid such as water as the simplest material, and the magnetic resonance signal is obtained. There has been provided a marker capable of detecting magnetic resonance or injecting a gel of a fatty material to suppress a magnetic resonance signal, which is not inserted into a subject or inserted. For example, JP-A-5-2930
The insert-shaped cross-shaped marker disclosed in 94 is built in a small coil in a coil cover and filled with a magnesium chloride aqueous solution. A non-insertable marker formed by enclosing a liquid in a hollow portion provided at the center of a laminated cylindrical marker made of gel (US Pat. No. 199)
No. 5,368,030) and a marker formed by encapsulating a lipid gel between two layers of plastic (US Pat.
1995, No. 5427099) is provided as a marker for treatment site positioning or medical image diagnosis using a magnetic resonance imaging apparatus or a CT apparatus. Further, JP-A-2-98
There is also a type in which a contrast agent layer is laminated on a plastic substrate, such as a marker that constitutes a treatment site positioning mechanism for a magnetic resonance imaging apparatus disclosed in 335.

[0003]

However, a marker mainly used in the field of neurosurgery,
The above-described conventional magnetic resonance imaging apparatus or CT
Markers used for positioning a treatment site by the device or for precise diagnosis of a region of interest are formed by stacking plastic sheets and enclosing a liquid or lipid gel in a cavity formed therebetween. Many types are provided, and in general, the shape of the marker becomes large, and it is necessary to completely seal the laminated plastic sheets to prevent liquid leakage. And increase the manufacturing cost.

The above-mentioned sheet type markers are often developed for the purpose of diagnosis in the field of neurosurgery, and are provided only for magnetic resonance image diagnostic apparatuses by utilizing a liquid or the like which reacts to magnetic resonance action. In many cases, it is inconvenient to use a magnetic resonance image diagnostic apparatus or a CT apparatus together with the need for precise positioning of a treatment site of a subject and efficient and precise diagnosis.

Further, in the field of orthopedic surgery, in order to detect and diagnose a laceration or a treatment site generated inside a subject, it is necessary to position a region of interest of a photographed medical image over a relatively wide region by a marker. There is. In this case, if a sheet-type marker is used to specify a relatively wide range of the region of interest, there is a disadvantage that a plurality of markers must be used.

[0006]

According to the present invention, there is provided a diagnostic / therapeutic sheet type marker for a magnetic resonance imaging apparatus or a CT apparatus, comprising a plastic sheet and a double-sided adhesive plastic sheet. It is characterized by a structure in which a non-magnetic metal wire and a magnetic tape are laminated and sandwiched between these two layers of plastic sheets.

A flexible type marker for diagnosis and treatment for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the present invention.
A helical non-magnetic metal wire is provided around a laminated magnetic tape or a stretchable plastic tube containing a gel or liquid, and the plastic tube and the non-magnetic It is characterized in that it has a structure in which a metal wire is inserted into a latex tube.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A diagnostic / therapeutic marker for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the present invention will be described in detail.

FIG. 1 shows a diagnostic / treatment marker for a magnetic resonance image diagnostic apparatus or a CT apparatus according to an embodiment of the present invention. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of another embodiment, and FIG. 4 is a perspective view of a third embodiment.

In each of the figures, 1 is a magnetic tape, 2 is a non-magnetic metal wire, 3 is a plastic sheet, 4 is a double-sided adhesive plastic sheet, 5 is the skin of the subject, and 6 is a spiral. It is a non-magnetic metal wire formed in a shape.

In the embodiment shown in FIGS. 1 and 2, a plastic sheet 4 constituting a sheet type marker of the present invention is provided between a plastic sheet 3 and a magnetic tape. 1 and a non-magnetic metal wire 2 and are formed of a double-sided adhesive tape so that they can be attached to the skin 5 of the subject.

[0012] Plastic sheet 3, double-sided adhesive tape
Between the plastic sheet 4 formed by the
A non-magnetic metal wire 2 is sandwiched on a magnetic tape 1 in a stacked state.

Instead of forming the plastic sheet 4 with a double-sided adhesive tape, the plastic sheet 3 and the plastic sheet 4 may be formed with a single-sided adhesive tape. In this case, the magnetic tape 1 and the non-magnetic metal wire 2 are sandwiched between the plastic sheet 3 and the plastic sheet 4, and the plastic sheet 4 is adhered to the skin 5 of the subject. Preferably, it is formed so that it can be formed.

When the magnetic tape 1 is formed by laminating the non-magnetic metal wire 2 on the magnetic tape 1, the width of the magnetic tape 1 is 1 mm or 3 mm, respectively, depending on the use for brain surgery or orthopedic surgery.
It is preferable that the diameter width of the nonmagnetic metal wire 2 is equal to 0.4 mm in both applications. Therefore, the magnetic tape 1 is formed wider so that both ends protrude from the laminated non-magnetic metal wire 2 by about 0.3 mm or 1.3 mm, respectively.
It is sandwiched between plastic sheets 3 and 4 in parallel with the long side of the sheet and at its center.

A magnetic resonance image diagnostic apparatus or a diagnostic / treatment sheet type marker for a CT apparatus formed as described above.
When the mosquito is adhered to the subject's skin 5 on the subject's brain surface or other region of interest and photographed by a magnetic resonance imaging apparatus, the magnetic tape formed wider than the nonmagnetic metal wire 2
The probe 1 deflects the magnetic field of the magnetic resonance imaging diagnostic apparatus at the part of the subject requiring diagnosis / treatment so that the medical image of the subject is recognized as two lines having a width of about 0.3 mm or 1.3 mm. The image is projected and photographed on the upper side, and the diagnosis / treatment portion of the subject can be precisely positioned.

When the marker according to the present invention is adhered to the subject's skin 5 on the brain surface or other region of interest of the subject and photographed by a CT apparatus, the emitted X-rays are irradiated with the nonmagnetic metal wire 2. Is absorbed and taken on a medical image of the subject so as to be recognized as one line having a width of about 0.4 mm, and a diagnostic / treatment portion can be precisely positioned on the image.

FIG. 3 shows another embodiment of a diagnostic and therapeutic marker for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the present invention.

As shown in FIG. 3, the magnetic tape 1
Is sandwiched between two layers of plastic sheets 3 and 4 adjacent to the non-magnetic metal wire 2. One side of a plastic sheet 4 formed of a double-sided adhesive tape is attached to and fixed to the skin 5 of the subject. In this case, the width of the magnetic tape 1 should be 0.5 mm or 3 mm, respectively, and the width of the non-magnetic metal wire 2 should be equally 0.4 mm, depending on the application for brain surgery or orthopedic surgery. Is preferred.
Further, the plastic sheets 3 and 4 may be formed of a single-sided adhesive tape.

The diagnosis of the subject is required by the magnetic resonance imaging diagnostic apparatus.
When an image of a treatment site is taken, the magnetic tape of the marker according to this embodiment deflects the magnetic field of the magnetic resonance imaging apparatus, and the magnetic tape is 0.5 mm depending on the application for brain surgery or orthopedic surgery.
Alternatively, a line having a width of about 3 mm is projected and photographed on a medical image of a diagnosis / treatment site requiring diagnosis, and the diagnosis / treatment site can be precisely positioned.

Further, when the CT apparatus is used to image the site of the subject to be diagnosed / treated, the non-magnetic metal wire 2 of the marker absorbs X-rays emitted from the CT apparatus, and
A line with a width of mm is projected and photographed on the medical image of the diagnosis / treatment site, and the treatment site can be precisely positioned.

As shown in FIG. 4, a non-magnetic metal wire is spirally formed as in the third embodiment of the diagnostic and therapeutic marker for a magnetic resonance image diagnostic apparatus or CT apparatus according to the first aspect of the present invention. It may be formed as a metal wire 6, provided around the magnetic tape 1, and sandwiched between the plastic sheets 3 and 4.

X is provided to provide a marker capable of precisely positioning a region of interest of a subject on a medical image using a CT apparatus.
If a thick metal wire is used to strongly absorb the wire,
If a fine wire (for example, 0.1 mm or less in diameter) is used, the resolution of the CT apparatus (about 1 m
The disadvantage of m) is that the purpose of precisely positioning the region of interest is not achieved. In this case, the non-magnetic metal wire 6 formed in a spiral shape using a thin metal wire is
The region of interest can be precisely positioned on the medical image without shifting the above-mentioned artifacts.

FIGS. 5, 6 and 7 show a plastic sheet 3 which can be used as a positioning ruler when a diagnosis / treatment site is precisely positioned by the sheet type marker of the present invention. FIG. 2 is a diagram showing the arrangement of a magnetic tape 1 sandwiched between the magnetic tape 1 and 4 (not shown).

A region of interest of the subject is examined by a magnetic resonance imaging diagnostic apparatus using a marker having a magnetic tape 1 arranged between the plastic sheets 3 and 4 in the configuration shown in each figure. When you shoot, the device's magnetic field is deflected,
Since the magnetic tape 1 is projected on the medical image of the region of interest of the subject as a line according to the configuration on which the magnetic tape 1 is arranged, the magnetic tape 1 can be used as a ruler for precisely positioning a treatment site on the image.

FIG. 8 shows an embodiment of a flexible type marker for diagnosis and treatment for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the second aspect of the present invention.

In FIG. 8, reference numeral 6 denotes a spirally formed non-magnetic metal wire, 7 denotes a laminated magnetic tape (not shown) or gel or liquid, and 8 denotes a plastic tube.
9 is an end forming an opening of the plastic tube 8, 10 is a latex tube, 11 is an end of the non-magnetic metal wire 6 embedded in the plastic tube 8, 12
Is an end forming an opening of the latex tube, and the other ends of the plastic tube 8 and the latex tube 10 are respectively closed.

The laminated magnetic tape 7 is disposed in an elastic plastic tube 8, and a spirally formed non-magnetic metal wire 6 is provided around the plastic tube 8 to form a plastic tube. The tube 8 and the non-magnetic metal wire 6 are fitted into the tube 10 made of latex. In this case, a gel or a liquid 7 may be used instead of the laminated magnetic tape 7.

The non-magnetic metal wire 6 spirally formed by using a thin metal wire can precisely position a region of interest on a medical image without causing an artifact. In this case, it is preferable to use a copper wire having a diameter of about 0.7 mm as the thin metal wire. A latex tube 10 into which the plastic tube 8 and the non-magnetic metal wire 6 are inserted.
Is preferably formed to have a diameter of about 5 mm and a length of about 300 mm.

As shown in FIG. 8, in the flexible type marker for diagnosis and treatment for the magnetic resonance imaging apparatus or the CT apparatus of the present invention, the end portion 11 of the spiral non-magnetic metal wire 6 is used. Is inserted into the plastic tube 8 at the end 9 forming the opening of the plastic tube 8 to protect the latex tube 10 and is shown in FIGS. 9, 10 and 11. As shown, an end forming an opening in the latex tube 10 for securing a marker component (6, 7, 8) which is inserted into the latex tube 10. 12 is fastened. In this case, the end 9 of the plastic tube 8 is
Fastened with end 12 of latex tube 10.

In general, in the field of orthopedic surgery, it is necessary to precisely position a laceration or a part requiring diagnosis within a subject on a medical image obtained by specifying a region of interest in a wide range and performing diagnosis.

A flexible type marker for diagnosis and treatment for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the present invention according to the second aspect of the present invention mainly covers a wide area of interest of a photographed medical image in the field of orthopedic surgery. We provide an extendable, deformable marker that is effective for positioning and precise diagnosis.

When a region of interest is to be positioned over a wide range using a marker on a medical image taken by a magnetic resonance diagnostic imaging apparatus or a CT apparatus, the area that can be positioned by a sheet-type marker is a diameter Since it is limited to a narrow range of 2 to 5 mm in width, there is an inconvenience that a plurality of markers must be used. The flexible type marker according to the second aspect of the present invention is shown in FIGS. 9 (application diagram for a subject), FIG. 10 (application diagram in which a figure 8 is formed), and FIG.
As shown in (Applied drawing forming Z-shape), the marker itself is formed to be long (300 mm) and expandable and contractable and deformable due to its structure. By positioning, it is possible to specify and diagnose a tear, a tumor, or the like generated inside the subject.

[0033]

As described above, a sheet-type marker for diagnosis and treatment for a magnetic resonance image diagnostic apparatus or a CT apparatus according to the present invention has a magnetic tape and a non-magnetic metal wire laminated thereon.
Since the structure is formed by sandwiching between two layers of plastic sheet, and the method of enclosing a liquid or a lipid gel is not used, the size of the marker can be reduced.
Since the prevention of liquid leakage from the plastic sheet of the layer can be omitted, its use is safe, the production method is simplified, and the production cost is reduced.

The sheet type marker of the present invention is formed by compactly sandwiching a magnetic tape and a non-magnetic metal wire between two layers of a plastic sheet. Even when the image diagnostic apparatus and the CT apparatus are used in combination, it is convenient and economical because it can be applied to the use of positioning and diagnosing a treatment site.

Further, the flexible marker according to the present invention locates a region of interest in a wide range on a photographed medical image, and recognizes a tear, a tumor, or the like generated inside the subject on the medical image for diagnosis. Therefore, it is possible to eliminate the use of a plurality of sheet-type markers whose positioning range is limited to a narrow range, and it is economical, convenient, and a simple and inexpensive manufacturing method. Mosquito can be provided.

[Brief description of the drawings]

FIG. 1 is a sheet type according to claim 1 of the present invention;
The front view of one Example of a marker.

FIG. 2 is a sectional view of FIG.

FIG. 3 is a cross-sectional view of another embodiment.

FIG. 4 is a perspective view of a third embodiment.

FIG. 5 is an arrangement configuration diagram of a sheet-type marker positioning ruler.

FIG. 6 is another arrangement configuration diagram of a sheet type marker positioning ruler.

FIG. 7 is a third view of a positioning ruler for the sheet type marker.
FIG.

FIG. 8 shows an embodiment of a flexible type marker.

FIG. 9 is an application diagram of a flexible type marker applied to a subject.

FIG. 10 is an application drawing of a figure eight of a flexible type marker.

FIG. 11 is an application diagram of a Z-type flexible type marker.

[Explanation of symbols]

1 magnetic tape, 2 non-magnetic metal wire, 3 plastic sheet
4, a double-sided adhesive plastic sheet, 5 subject skin, 6 spiral non-magnetic metal wires, 7 laminated magnetic tapes or gels or liquids, 8 plastic tubes, 9 plastic tubes End of tube, 10 latex tube
The end of the spiral non-magnetic metal wire 6 embedded in the plastic tube 8 at the opening side and the end of the latex tube at the opening side.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-153229 (JP, A) JP-A-1-299533 (JP, A) JP-A-4-183437 (JP, A) JP-A-8-183 224255 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) A61B 5/055 A61B 6/00-6/14

Claims (2)

(57) [Claims] An image of a brain surface of a subject or other parts to be diagnosed is taken by a magnetic resonance image diagnostic apparatus or a CT apparatus, and a plastic sheet is used in a marker structure used for diagnosis and treatment of the subject. And double-sided adhesive plastic sheet
Sheet-type magnetic resonance imaging apparatus or CT having a structure in which a non-magnetic metal wire and a magnetic tape are stacked and sandwiched between these two-layer plastic sheets. A diagnostic and therapeutic marker for the device. 2. A laminated magnetic tape or an elastic plastic tube containing a gel or liquid,
A flexible type magnetic resonance diagnostic imaging apparatus or CT apparatus having a structure in which a spirally formed non-magnetic metal wire is provided around and a plastic tube and a non-magnetic metal wire are inserted into a latex tube. Diagnostic and therapeutic markers for medical use.