JP2007151614A - Medical imaging marker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical imaging marker capable of simply and precisely associating an image with an actual body in the medical imaging marker being used when capturing images of a patient with medical imaging apparatus such as CT and MRI. <P>SOLUTION: This medial imaging marker is provided with two main faces 4a and 4b composed planes formed in symmetrical regions across an intersection 7 of two straight lines 5 and 6 orthogonally crossing with each other, two pairs of side faces 8a, 8b, 9a and 9b using at least parts of the straight lines 5 and 6 as boundary sides 5a, 5b, 6a and 6b and provided perpendicularly to the respective main faces 4a and 4b and two plate members 2a and 2b including two main faces and two side faces and formed of a contrast imaging material. The use of the marker can facilitate the precise correspondence between the image and the actual body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a medical imaging marker for use in imaging a patient or the like with a medical imaging apparatus such as CT or MRI.

In the medical field, the position and orientation of the treatment specified on the image when performing a procedure based on the image diagnosis result or the simulation result using medical three-dimensional image information taken by an imaging device such as CT or MRI. It is necessary to reflect and specify on the entity.
For example, an implant (artificial tooth root) setting procedure in dentistry will be described as an example.
Instead of the conventional X-ray image which is a two-dimensional image, 3D-CT data (CT imaging data) having accurate three-dimensional position information is used for image diagnosis for determining the planting position and orientation. For example, a dummy tooth to be arranged in the tooth defect site is made, a hole in the implant placement direction is made in the dummy tooth, and a resin bed (with a diagnostic stent and a material having contrast properties is injected into the hole. Called). And CT imaging | photography is performed in the state mounted | worn in a patient's oral cavity, and the planting assumption position and direction are projected as a guide hole (hole filling) on the image | photographed three-dimensional image.

Using this guide hole as a reference, a cross-sectional image of the jawbone is created, and the planting position and site are confirmed and examined. As a result, if there is no problem in the assumed position and orientation, the procedure is performed using the diagnostic stent as a guide as it is. In the operation, drilling is performed along the guide hole, and the implant is planted. As described above, the image diagnosis result is reflected on the substance and used to specify the position and orientation of the treatment at the time of treatment. (See Patent Documents 1 and 2)
JP 2003-245289 A JP2001-212158

In practice, however, the planting position and orientation often have to be corrected to a position and orientation different from the assumed guide hole position and orientation. In such a case, there has been a problem that it is difficult to accurately reflect the correction of the position and orientation on the diagnostic stent based on only the guide hole.
Therefore, a method has been attempted in which three-dimensional position coordinates of the planting position and orientation determined in image diagnosis are obtained and a guide is created by CAD. However, the imaging ability of CT imaging data is usually data taken at intervals of 0.3 to 1 mm due to problems such as the amount of exposure. In addition, since an artifact (disturbance of an image) is generated in a tooth region due to a restoration made of metal, it is difficult to create an accurate guide directly from CT data by CAD.

  Therefore, it is necessary to utilize a dentition model collected in the oral cavity. To use the dentition model, for example, three-dimensional form information is collected from the dentition model with a laser scanner or the like, and the dentition model form information is replaced with a corresponding dentition-related region on the 3D-CT image. There is a method of creating a guide by CAD based on the position coordinates of the image diagnosis result on the above image or simply on the dentition model form information. Alternatively, using a 3D measuring device that can measure and display 3D position coordinates, based on the position coordinate information of the image diagnosis result, a method for creating a guide directly on the dentition model, or a diagnostic stent A method of making corrections may be considered.

In any method, in order to accurately reflect the position and orientation specified on the image on the entity, the accuracy of the marker (mark for specifying the position) on the stent that connects the entity and the image is important.
Conventionally, a sphere is used for many of the markers. However, since the specific point specified from the sphere is limited to one point that is the center, at least three spheres are required to associate the position information three-dimensionally. Further, since the specific point is inside the marker, it is difficult to specify the specific point from the surface with a three-dimensional measuring instrument or the like.

  As described above, in the medical field, the treatment specified on the image when performing a procedure based on the image diagnosis result using the medical three-dimensional image information or the simulation result taken with an imaging device such as CT or MRI. It is necessary to reflect the position and orientation on the substance and specify them. Therefore, there is a need for a medical imaging marker that can easily and accurately associate a three-dimensional positional relationship between a three-dimensional image and an entity.

  The present invention has been made based on such a background, and a main object of the present invention is to provide a medical imaging marker capable of easily and accurately associating an image with an entity.

  The invention according to claim 1 is formed in a symmetric region across an intersection of two straight lines orthogonal to each other, and has a boundary between at least a part of the straight lines and two main surfaces composed of planes having the straight lines as sides. A pair of side surfaces provided at right angles to each main surface, and a plate-like member including the two main surfaces and the two pairs of side surfaces and formed of a contrast-enhancing material. It is a medical imaging marker characterized.

The invention described in claim 2 has a complementary member made of a non-contrast material that fills a region where the two main surfaces do not exist and has a plane continuous with the two main surfaces. The medical imaging marker according to claim 1.
The invention according to claim 3 is characterized in that the complementary member covers the entire back side (the back side of the plate-like member) of two main surfaces formed of a contrast-enhancing material. It is a photography marker for use.

The invention according to claim 4 is the medical imaging marker according to claim 1 or 2, characterized in that an overall contour shape viewed from the upper side of the main surface in a direction orthogonal to the main surface is a rectangle.
The invention according to claim 5 is the medical imaging marker according to claim 2 or 3, characterized in that an overall contour shape viewed from the upper side of the main surface in a direction orthogonal to the main surface is circular.
The invention according to claim 6 is characterized in that the plate-like member has a connecting portion in a region including an intersection of two straight lines in order to connect the two main surfaces. Or a medical imaging marker according to any one of the above.

The invention according to claim 7 is the medical imaging marker according to any one of claims 1 to 6, characterized in that the back side of the main surface is a surface of an arbitrary shape that is not a flat surface.
The invention according to claim 8 has a main surface composed of a plane having at least two sides orthogonal to each other, and a pair of side surfaces extending at right angles from the two sides with two orthogonal sides of the main surface as a boundary side. The plate-like medical imaging marker is characterized in that the whole is formed of a contrast-enhancing material.

According to the present invention, based on the image of the plate-like member formed of a contrast-enhancing material, the position and orientation of the part to be specified in the medical three-dimensional image can be specified accurately. The position and orientation specified on the image can be correctly positioned on the basis of the marker according to the present invention.
More specifically, according to the present invention, for example, in the display state of the side surface viewed from the main surface, that is, in the viewpoint orthogonal to the main surface, the side on the main surface side of the side surface and the opposite side are in the viewpoint direction. A continuous boundary surface composed of two main surfaces arranged in a row appears as a continuous straight line, and it is easy to specify coordinate axes such as the X axis and the Y axis. On the other hand, if the viewpoint is not orthogonal, the side surface is displayed as a surface, so the boundary surface of one main surface is displayed wide (the opposite side of the main surface side of the side surface is displayed as the boundary line of the contrast unit), On the other side of the main surface, only the side on the main surface side is displayed (the opposite side is the back side of the viewpoint direction and cannot be seen), so the continuous boundary surface composed of the two main surfaces is straight as a straight line It disappears on the line. In this way, depending on whether or not continuous boundary surfaces composed of contrast-enhanced and non-imaging structures are displayed in a straight line, the viewpoint direction and coordinate axes (or The error in setting the coordinate plane) can be easily confirmed.

  That is, according to the marker of the present invention, which forms a three-dimensionally continuous boundary surface by a form and arrangement using a perpendicular plane such as a main surface and a side surface, the marker on the image and the marker entity The association of the form and coordinates can be performed more accurately and easily than before. Therefore, it is more accurate and simpler than before to associate two or more medical 3D images taken with an imaging device at different times, and associate the position and orientation specified on the medical 3D image and substance. Can be done. The position and orientation specified on each image or entity can be accurately reflected and specified.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1A is a perspective view of a medical imaging marker (hereinafter simply referred to as “marker”) 1 according to an embodiment of the present invention, FIG. 1B is a plan view thereof, and FIG. Is a front view thereof, and FIG. 1 (d) is a right side view thereof.
Referring to FIGS. 1A to 1D, a marker 1 has a plate-like rectangular parallelepiped plate-like member 2a, 2b having a square shape in plan view and a thickness t, and a thickness t. The thin plate-shaped rectangular parallelepiped two complementary members 3a and 3b are combined in a grid shape to form a rectangular parallelepiped as a whole in plan view.

The plate-like members 2a and 2b shown with hatching are made of a contrasting material (for example, aluminum, apatite, etc.) so as to be displayed as an opaque image when taken with a medical imaging device such as CT or MRI. Is formed.
On the other hand, the complementary members 3a and 3b are formed of a non-contrast material (for example, acrylic resin or the like) that is transmitted and is not projected as an image when taken with a medical imaging device.

  The plate-like members 2a and 2b are arranged so that the corners 7 face each other, and one side 5a that forms the outline of the upper surface (main surface) 4a of the plate-like member 2a and the upper surface (mainly) of the plate-like member 2b. The side 5b forming the outline of the surface 4b is arranged so as to form one straight line in plan view. Moreover, the other one side 6a which comprises the outline of the main surface 4a, and the other one side 6b which comprises the outline of the main surface 4b are also arrange | positioned so that it may extend in a straight line by planar view. Since the plate-like members 2a and 2b have a rectangular parallelepiped shape, the main surfaces 4a and 4b are naturally flat surfaces, and the two main surfaces 4a and 4b are arranged in a horizontal direction.

  Since it is the above configuration, the marker 1 can be described as follows when the expression is changed. That is, at least one of the two main surfaces 4a and 4b and two main surfaces 4a and 4b formed of planes formed in a symmetric region across the intersection 7 of two straight lines 5 (5a + 5b) and 6 (6a + 6b) orthogonal to each other. The portions are boundary sides 5a, 6a and 5b, 6b, and two pairs of side surfaces 8a, 9a and 8b, 9b provided at right angles to the respective main surfaces 4a and 4b, and the main surface 4a, side surface 8a and side surface 9a A first plate-like member 2a formed of a contrast-enhancing material, and a second plate-like member 2b formed of a contrast-enhancing material including a main surface 4b, a side surface 8b, and a side surface 9b. Yes.

Further, the complementary members 3a and 3b fill the region where the two main surfaces 4a and 4b do not exist, and have planes 10a and 10b that are continuous with the two main surfaces 4a and 4b in the horizontal direction.
Further, since the plate-like members 2a and 2b are rectangular parallelepipeds, the angle formed between the main surface 4a and the side surfaces 8a and 9a is a right angle. Similarly, the angle formed between the main surface 4b and the side surfaces 8b and 9b. Is also a right angle.
2A, 2B, 2C, and 2D are a perspective view, a plan view, a front view, and a right side view of a marker 11 according to another embodiment of the present invention. Compared with the marker 1 shown in FIG. 1, the marker 11 shown in FIG. 2 has a square overall shape in plan view, but the size of the plate-like members 2a and 2b in plan view is different. That is, the plate-like member 2a is a rectangular parallelepiped having a relatively large main surface 4a, and the plate-like member 2b is a rectangular parallelepiped having a relatively small main surface 4b. Further, the complementary members 3a and 3b fill the regions where the two principal surfaces 4a and 4b do not exist so that the overall shape of the marker 11 in plan view is a square.

The rest of the configuration is the same as that of the marker 1 shown in FIG. 1, and the same parts are denoted by the same reference numerals and redundant description is omitted.
3A to 3D are a perspective view, a plan view, a front view, and a right side view of a marker 21 according to another embodiment of the present invention. The marker 21 shown in FIG. 3 is different from the marker 1 shown in FIG. 1 in that the outline (outer shape) in plan view is circular. For this reason, the plate-like members 2a and 2b and the complementary members 3a and 3b are respectively It is a point which is a plate-shaped member having a fan shape and a thickness t in plan view.

Also in the marker 21 shown in FIG. 3, the main surfaces 4a and 4b are arranged in the horizontal direction, the sides 5a and 5b are arranged in a straight line, and the other sides 6a and 6b are arranged in a straight line. 5a + 5b) and the straight line 6 (6a + 6b) are orthogonal to each other, and two main surfaces (planes) 4a, 4b are arranged with an intersection 7 therebetween.
Further, the side surfaces 8a and 9a are provided at right angles to the main surface 4a with the sides 5a and 6a as boundary sides. The side surfaces 8b and 9b are also provided at a right angle with respect to the main surface 4b, with the sides 5b and 6b being the boundary sides.

The plate-like member 2a including the main surface 4a and the two side surfaces 8a and 9a is formed of a contrast material. Similarly, the plate-like member 2b including the main surface 4b and the two side surfaces 8b and 9b is also It is made of contrast material.
Further, the complementary members 3a and 3b filling the regions where the main surfaces 4a and 4b do not exist are formed of a non-contrast material.

Note that the outline (outer shape) of the marker 21 shown in FIG. 3 in plan view is not limited to a circle, and may be changed to a rhombus, an ellipse, or any other shape.
4A to 4D are a perspective view, a plan view, a front view, and a right side view of a marker 31 according to still another embodiment of the present invention.
The marker 31 shown in FIG. 4 is different from the marker 1 shown in FIG. 1 in that it covers the lower surface of the plate-like members 2a and 2b made of contrast material (the surface opposite to the main surfaces 4a and 4b). In other words, the complementary member 3 is arranged. In other words, a plate-like complementary member 3 formed of a non-contrast material having a square shape in plan view is attached to the entire bottom surface side of the marker 1 shown in FIG. 1, and the complementary member 3 is a complementary member 3a, It is the structure united with 3b. The thickness of the plate-like members 2a and 2b is t, but the thickness of the entire marker 31 is t1 (t1> t).

In the case of the marker 1 shown in FIG. 1, the plate-like members 2a and 2b and the complementary members 3a and 3b are made by bonding the side surfaces with, for example, a non-contrast adhesive. However, the work for that is complicated.
In the marker 31 shown in FIG. 4, for example, two plate-like members 2 a and 2 b are arranged at predetermined positions, and a non-contrast material is filled so as to fill the area where the lower surface and the two main surfaces 4 a and 4 b do not exist. It can be made by molding or the like so as to fill, and the manufacturing work can be facilitated.

In the marker 31, in order to keep the connection between the plate-like members 2a and 2b and the complementary member 3 better, the complementary member 3 enters the back side of the plate-like members 2a and 2b (the side opposite to the main surfaces 4a and 4b). Fixing maintenance holes 32a and 32b may be formed.
This is because, as will be described later, in the plate-like members 2a and 2b, the areas used in the captured image are the main surfaces 4a and 4b, the side surfaces 8a, 8b, 9a and 9b, and the sides 5a, 6a and 5b forming a straight line. This is because it is 6b, and the other portions may have any shape.

FIG. 5 is a view for explaining a marker 41 according to still another embodiment of the present invention, where (a) is a perspective view, (b) is a plan view, (c) is a front view, and (d) is a front view. It is a right view.
The characteristics of the marker 41 will be described in comparison with the marker 1 shown in FIG. 1. In the state where the first plate-like member 2a and the second plate-like member 2b are arranged with the corners 7 facing each other, these 2 It is that the connection part 42 for connecting the two plate-shaped members 2a and 2b is provided. Here, the plate-like member 2a, the plate-like member 2b, and the connecting portion 42 are integrally formed of a contrast material. The connecting portion 42 also has a thickness t, and its upper surface extends horizontally and flatly with the main surfaces 4a and 4b.

In the marker 41, the area where the plate-like members 2a and 2b and the connecting portion 42 do not exist is not filled with the complementary member, and is an empty area.
In the case of this marker 41 as well, when used as a marker for photographing a human body with a medical imaging device, the main surfaces 4a and 4b, the straight line 5 (side 5a + 5b), the straight line 6 (side 6a + 6b), the side surfaces 8a and 8b, the side surface 9a and 9b function as image positioning references. This will be described in detail later.

The marker 41 is the same as the configuration of the marker 1 described in FIG. 1 except that it has a connecting portion 42 and does not have a complementary member. The same or corresponding parts are denoted by the same numbers. Thus, duplicate description is omitted.
FIG. 6 is a view for explaining a marker 51 according to still another embodiment of the present invention, where (a) is a perspective view, (b) is a plan view, (c) is a front view, and (d) is a front view. It is a right view.

The marker 51 is different from the marker 41 shown in FIG. 5 in that the outer edge of the connecting portion 42 is not a straight line but a curved line, and the empty region and the back side of the plate-like members 2a and 2b are complemented. That is, the member 3 is filled.
As shown in FIG. 6B, even if the outline of the connecting portion 42 is, for example, an arcuate curved shape, no problem occurs when the marker 51 is used for positioning. This is because the plate-like members 2 a and 2 b connected by the connecting portion 42 have sides 5 a and 5 b that constitute a part of the straight line 5, and sides 6 a and 6 b that constitute a part of the straight line 6. Because there exists. Also, there are side surfaces 8a, 8b, 9a, 9b that are perpendicular to the main surfaces 4a, 4b, with these sides 5a, 5b, 6a, 6b as boundary sides.

In the marker 51, the regions where the two main surfaces 4a and 4b do not exist and the back surfaces of the plate-like members 2a and 2b are filled with complementary members 3, 3a and 3b made of a non-contrast material. Has a rectangular parallelepiped shape. Therefore, there is an advantage that it is easy to handle.
7A and 7B are views for explaining the configuration of a marker 61 according to still another embodiment of the present invention, in which FIG. 7A is a perspective view, FIG. 7B is a plan view, FIG. 7C is a front view, and FIG. ) Is a right side view.

  The feature of the marker 61 shown in FIG. 7 is that two plate-like members 2a and 2b having a thickness t are connected by a connecting portion 42 as in the marker 41 shown in FIG. 4a and 4b, and the contour shape is not a straight line but an arc. Further, the empty region is not filled with a non-contrast-material supplement member. Similarly to the markers already described, this marker 61 also has principal surfaces 4a, 4b, sides 5a, 5b, 6a, 6b for forming straight lines and side surfaces 8a, 8b, 9a, 9b perpendicular to principal surfaces 4a, 4b. have.

In addition, regarding the external shape of the marker 61, it is possible to take an arbitrary shape.
FIG. 8 is a diagram for explaining that, in each of the markers 1, 31, 41 already described, the shape on the back surface side can take an arbitrary shape instead of a flat surface. 8A is a modification of FIG. 1C, FIG. 8B is a modification of FIG. 4C, and FIG. 8C is a modification of FIG. 5C.

As shown in FIGS. 8A to 8C, each marker can have an arbitrary shape instead of a plane on the back surface side. In this case, it is preferable that the irregularities on the back side of the arbitrary shape are curved so as to have an R.
FIG. 9 is a diagram showing the configuration of a marker 71 according to still another embodiment of the present invention, where (a) is a perspective view, (b) is a plan view, (c) is a front view, and (d) is a right side view. FIG. The marker 71 shown in FIG. 9 is a thin plate-shaped rectangular parallelepiped having a thickness t and formed of a contrast material. The marker 71 includes a main surface 4 that is the upper surface thereof, a side surface 8 that is formed perpendicular to the main surface 4 with the side 5 as a boundary side, and a side surface 9 that is formed perpendicular to the main surface 4 with the side 6 as a boundary side. Have.

10A and 10B are views for explaining the configuration of a marker 81 according to still another embodiment of the present invention, in which FIG. 10A is a perspective view, FIG. 10B is a plan view, FIG. 10C is a front view, and FIG. Is a right side view.
Compared with the marker 71 shown in FIG. 9, the marker 81 shown in FIG. 10 is characterized in that its bottom surface is recessed in a concave curve shape in front view. By making the bottom surface of the marker 81 concavely curved, for example, there is an advantage that it is easy to attach to a predetermined part of the human body.

Also in the marker 81, the main surface 4 necessary for positioning reference, the sides 5, 6 and 5 which are straight lines orthogonal to each other are used as boundary sides, and the side surface 8 and the side 6 perpendicular to the main surface 4 are used as boundary sides. It has a side surface 9 perpendicular to the surface 4.
FIG. 11 is a view for explaining a marker 91 according to still another embodiment of the present invention, where (a) is a perspective view, (b) is a plan view, (c) is a front view, and (d) is a right side view. FIG.

  The marker 91 shown in FIG. 11 is also a plate-like member having a thickness t formed entirely of a contrast-enhancing material, and is a straight line that is perpendicular to each other and forms a part of the contour of the main surface 4 and the main surface 4 that are flat surfaces. There are two sides 8 and 9 that are perpendicular to the main surface 4 with the sides 5 and 6 and the sides 5 and 6 as the boundary sides. The marker 91 only needs to be provided with these positioning elements, and the remaining shape can be a curved shape as shown in FIG.

Next, a description will be given of how to position an image according to a marker image when an entity with a marker according to the present invention is photographed.
For example, assume that the human body is photographed with the marker 1 shown in FIG. The marker 1 is reflected as a shadow in the photographed image. Therefore, the orientation of the captured image is adjusted so that the shadow of the marker 1 is reflected as shown in FIG. In this state, the marker 1 is viewed in a plan view, and the sides 5a and 5b are shown in a straight line, and the sides 6a and 6b are also shown in a straight line. Therefore, the coordinates can be determined with the direction perpendicular to the paper surface at the corner 7 as the Z axis, the straight lines 5a and 5b as the X axis, and the straight lines 6a and 6b as the Y axis.

If the orientation of the image is not correct, as shown in FIG. 12B, either or both of the side surfaces 8a, 9a or 8b, 9b of the marker 1 can be seen, and the Z axis is inclined. It can be recognized that it is not correctly viewed from above.
Even when the marker 71 described with reference to FIG. 9 is used, the coordinates can be similarly positioned. That is, in the image photographed with the marker 71 mounted, the shadow of the marker 71 is displayed as a rectangle as shown in FIG. 13A, and the directions where the sides 5 and 6 are straight and intersect at right angles It can be defined as the Z-axis direction.

If the orientation of the image is not the Z-axis direction, a shadow of the side surface 8 and / or the side surface 9 appears on one or both of the sides 5 and 6, as shown in FIG.
FIG. 14 is a diagram for explaining another way of specifying coordinates based on a marker image.
As shown in FIG. 14A, by specifying three points on the main surfaces 4a and 4b of the plate-like members 4a and 4b shown in the photographed image, a position orthogonal to the surface including the three points. The coordinates, that is, the Z axis can be specified (FIG. 14B). Therefore, the image can be rotated so that the marker image can be seen from the specified Z-axis direction, and the three-dimensional coordinates can be determined using the straight lines 5a and 5b reflected in the marker image as the X-axis and the 6a and 6b as the Y-axis (see FIG. 14 (c)).

And in the entity (human body or human body model), the position can be confirmed based on the principal surfaces 4a, 4b, sides 5a, 5b, 6a, 6b and side surfaces 8a, 8b, 9a, 9b of the mounted marker, Can be associated.
Even in the case of the marker 71 etc. described in FIG. 9, the Z axis can be specified by specifying three points on the main surface, and the X axis and the Y axis are specified based on the sides 5 and 6. it can.

Next, a specific example of how to associate an image with an entity using the marker according to the present invention for implant setting treatment in dentistry will be described.
FIG. 15 is a perspective view showing a state in which the stent 12 provided with the marker 31 according to one embodiment of the present invention is attached to the substance (dental model). The stent 12 is entirely made of a non-contrast material, and covers a plurality of teeth T arranged in the dentition model 13. A marker 31 is fixed to the stent 12 at a predetermined position. Specifically, the non-contrast material constituting the stent 12 and a part of the complementary member of the marker 31 are fixed.

In FIG. 15, the side plate 14 extending downward is provided in relation to the marker 31, but the side plate 14 may not be provided.
When the dental model 13 to which the stent 12 to which the marker 31 shown in FIG. 15 is attached is attached is photographed with a medical photographing apparatus, for example, CT, an image shown in FIG. 16 is obtained. This image is constructed as a three-dimensional image and can be confirmed from an arbitrary direction. The stent 12 is not shown in the image, and only the teeth T, the mandible, and the plate-like members 2a and 2b of the marker 31 are shown.

In the image diagnosis, the implantation position and orientation of the implant are determined based on this image. In FIG. 16, what is indicated by a thick line 15 is the implant placement position and orientation determined by diagnosis.
Next, in the image shown in FIG. 16, the XYZ coordinate system of the marker is determined from the images of the plate-like members 2a and 2b of the marker 31, and the implantation of the implant determined by diagnosis based on the determined XYZ coordinate system The position and orientation are reflected on the stent 12 (FIG. 17).

Then, as shown in FIG. 18, the implant planting position and orientation 15 reflected on the stent are specified with a three-dimensional measuring instrument or the like, marked on the stent (giving guide holes 16 and the like), and FIG. Create a guide as shown.
Then, the guide is attached to the entity, and an implant planting treatment is performed.
The present invention is not limited to the markers according to the various embodiments described above, and various modifications can be made within the scope of the claims. For example, an arbitrarily shaped adduct can be added to each marker with a non-contrast material.

It is a figure for demonstrating the medical imaging marker 1 which concerns on one Embodiment of this invention. It is a figure for demonstrating the medical imaging marker 11 which concerns on other embodiment of this invention. It is a figure for demonstrating the medical imaging marker 21 which concerns on other embodiment of this invention. It is a figure for demonstrating the medical imaging marker 31 which concerns on further another embodiment of this invention. It is a figure for demonstrating the medical imaging | photography marker 41 which concerns on further another embodiment of this invention. It is a figure for demonstrating the medical imaging | photography marker 51 which concerns on further another embodiment of this invention. It is a figure for demonstrating the medical imaging | photography marker 61 which concerns on further another embodiment of this invention. It is a figure for demonstrating that the shape of the back surface side can take arbitrary shapes instead of a plane in the medical imaging markers 1, 31, and 41. FIG. It is a figure for demonstrating the medical imaging | photography marker 71 which concerns on further another embodiment of this invention. It is a figure for demonstrating the medical imaging | photography marker 81 which concerns on further another embodiment of this invention. It is a figure for demonstrating the medical imaging | photography marker 91 which concerns on further another embodiment of this invention. It is a figure for demonstrating how an image is positioned by the image | video of a marker. It is a figure for demonstrating how an image is positioned by the image | video of a marker. It is a figure for demonstrating another method of the coordinate specification based on a marker image. It is a perspective view which shows the state which mounted | wore the substance (dental model) with the stent 12 to which the medical imaging marker 31 which concerns on one Embodiment of this invention was provided. It is a figure of the three-dimensional image based on CT imaging information of FIG. It is a figure for demonstrating reflecting the planting position and orientation of an implant on the stent 12. FIG. It is a figure which shows an example of the produced guide.

Explanation of symbols

1, 11, 21, 31, 41, 51, 61, 71, 81, 91 Medical imaging marker 2a, 2b Plate-like member 3a, 3b Supplementary member 4a, 4b Main surface 5a, 5b Side (straight line)
6a, 6b side (straight line)
7 corners 8a, 8b, 9a, 9b side face 42 connecting part

Claims (8)

Two main surfaces that are formed in a symmetric region across the intersection of two straight lines orthogonal to each other, and are composed of planes having the straight line as a side;
Two pairs of side surfaces each having at least a part of the straight line as a boundary side and provided at right angles to each main surface;
A plate-shaped member including the two main surfaces and two pairs of side surfaces and formed of a contrast-enhancing material;
A medical imaging marker comprising:   2. The medical use according to claim 1, further comprising: a complementary member made of a non-contrast material that fills a region where the two main surfaces do not exist and has a plane continuous with the two main surfaces. Shooting marker.   The medical imaging marker according to claim 2, wherein the complementary member covers the entire back side of the two main surfaces (back side of the plate-like member) formed of a contrast-enhancing material.   The medical imaging marker according to claim 1 or 2, wherein an overall contour shape of the main surface as viewed in a direction orthogonal to the main surface is a rectangle.   The medical imaging marker according to claim 2 or 3, wherein an overall contour shape viewed in a direction orthogonal to the main surface from above the main surface is circular.   The said plate-shaped member has a connection part in the area | region containing the intersection of two straight lines in order to connect the said 2 main surface, The medical use in any one of Claims 1-5 characterized by the above-mentioned. Shooting marker.   The medical imaging marker according to any one of claims 1 to 6, wherein the back side of the main surface is a surface of an arbitrary shape that is not a flat surface. A main surface composed of a plane having at least two sides orthogonal to each other;
A plate-like medical imaging having a pair of side surfaces extending at right angles from the two sides with two sides orthogonal to the main surface as a boundary side, the whole being formed of a contrast material marker.

Images