WO2023007702A1 - 磁性マーカセット、磁性マーカ配置方法 - Google Patents
磁性マーカセット、磁性マーカ配置方法 Download PDFInfo
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- WO2023007702A1 WO2023007702A1 PCT/JP2021/028332 JP2021028332W WO2023007702A1 WO 2023007702 A1 WO2023007702 A1 WO 2023007702A1 JP 2021028332 W JP2021028332 W JP 2021028332W WO 2023007702 A1 WO2023007702 A1 WO 2023007702A1
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- Prior art keywords
- magnetic marker
- rod
- inner cylinder
- magnetic
- hole
- Prior art date
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 171
- 239000003550 marker Substances 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims description 12
- 230000005415 magnetization Effects 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 241001422033 Thestylus Species 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000004907 flux Effects 0.000 description 9
- 206010006187 Breast cancer Diseases 0.000 description 5
- 208000026310 Breast neoplasm Diseases 0.000 description 5
- 239000003302 ferromagnetic material Substances 0.000 description 5
- 210000000481 breast Anatomy 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/0515—Magnetic particle imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3925—Markers, e.g. radio-opaque or breast lesions markers ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3954—Markers, e.g. radio-opaque or breast lesions markers magnetic, e.g. NMR or MRI
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/39—Markers, e.g. radio-opaque or breast lesions markers
- A61B2090/3987—Applicators for implanting markers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/06—Devices, other than using radiation, for detecting or locating foreign bodies ; determining position of probes within or on the body of the patient
- A61B5/061—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body
- A61B5/062—Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body using magnetic field
Definitions
- the present invention relates to a magnetic marker set including a magnetic marker for indicating a target position and a magnetic marker placement method for placing the magnetic marker at the target position.
- Patent Document 1 is known as a conventional technology for magnetic markers
- Patent Document 2 is known as a device for detecting magnetic markers.
- Patent Document 1 mentions various shapes of magnetic markers and materials. However, since the structure and the state of magnetization suitable for the easily detectable magnetic marker have not been specified, it is unknown what kind of structure is preferable.
- An object of the present invention is to provide a magnetic marker that is easy to detect.
- the magnetic marker set of the present invention includes a first rod and a second rod made of a magnetic material having rod-like remanent magnetization characteristics, a magnetic marker having a third rod-like rod, and a needle having a hole in the longitudinal direction.
- the magnetic marker further comprises: a first connecting portion in which one end in the longitudinal direction of the first rod and one end in the longitudinal direction of the second rod are rotatably connected; the other end in the longitudinal direction of the second rod; It also has a second connecting portion rotatably connected to one longitudinal end of the .
- a magnetic marker is inserted into the hole and is magnetized such that the direction of the magnetic field is reversed at the first connecting portion.
- the magnetic marker set also includes an approaching mechanism that brings the other longitudinal end of the first rod closer to the other longitudinal end of the third rod when the magnetic marker is pushed out of the hole.
- a magnetic marker placement method using a magnetic marker set of the present invention performs a needle insertion step and an extrusion step. In the needle inserting step, with the magnetic marker inserted into the hole, the tip of the needle is inserted into the position where the magnetic marker is to be placed. The pushing step pushes the magnetic marker out of the hole such that the first connecting portion is oriented toward a device that detects the magnetic marker.
- the magnetic marker is pushed out from the needle, and the other longitudinal end of the first rod and the other longitudinal end of the third rod come into contact.
- the first, second and third rods form a triangle. Since the direction of the magnetic field is reversed at the first connecting portion when inserted into the needle, the direction of the magnetic field at the first connecting portion becomes substantially the same when pushed out from the needle and deformed. . As a result, the magnetic field generated by the magnetic marker becomes stronger, which facilitates detection.
- FIG. 4 is a diagram showing a configuration example of a magnetic marker, in which a first rod, a second rod, and a third rod are arranged linearly;
- FIG. 4 is a diagram showing a configuration example of a magnetic marker, in which first rods, second rods, and third rods are arranged in a triangular shape;
- FIG. 4 is a diagram showing an example of the shape of the first rod;
- FIG. 4 shows a state in which the magnetic marker 100 is inserted into the hole 210;
- FIG. 4 shows a state in which the magnetic marker 100 is inserted into the hole 210;
- FIG. 10 is a diagram showing a state in which the first rod 110 is pushed out using the pushing means 510 while tension is applied to the thread 143;
- FIG. 10 is a diagram showing a state in which the first rod 110 and the second rod 120 are pushed out using the pushing means 510 while tension is applied to the thread 143;
- FIG. 10 is a diagram showing a state in which the entire magnetic marker 100 is pushed out using the push-out means 510 while tension is applied to the thread 143 ;
- the figure which shows the state which comprised the 1st connection part and the 2nd connection part by the coil-shaped elastic body, and arranged the 1st rod, the 2nd rod, and the 3rd rod in linear form.
- FIG. 4 is a diagram showing a configuration for magnetizing a magnetic marker; The figure which shows the state of the magnetic field of a permanent magnet. The figure which shows the state of the magnetic flux density near the center line of a permanent magnet. The figure which shows another structure which magnetizes a magnetic marker.
- FIG. 4 is a diagram showing the state of the magnetic field inside the magnetic marker in a magnetized state; State of the magnetic field when the first, second, and third rods are arranged in a triangular shape (the other longitudinal end of the first rod and the other longitudinal end of the third rod are in contact) illustration.
- needle which gave the pattern which the reflection characteristic of an ultrasonic wave changes is stuck in an object, and it detects by an ultrasonic wave.
- FIG. 1 shows a configuration example of a magnetic marker set.
- FIG. 2 shows a configuration example of a magnetic marker, showing an example in which a first rod, a second rod, and a third rod are arranged linearly.
- FIG. 3 shows a configuration example of a magnetic marker, showing an example in which first rods, second rods, and third rods are arranged in a triangle.
- FIG. 4 shows an example of the shape of the first rod
- FIG. 5 shows an example of the shape of the second rod
- FIG. 6 shows an example of the shape of the third rod.
- 4A, 5A, and 6A are front views.
- 4(B), 5(B), and 6(B) are left side views.
- 4(C), 5(C), and 6(C) are plan views.
- the magnetic marker set 10 includes a magnetic marker having a first rod 110 and a second rod 120 made of rod-shaped ferromagnetic material, a third rod 130 and a needle 200 having a hole 210 in the longitudinal direction.
- the third rod 130 may also be made of a ferromagnetic material, or may be made of a non-magnetized material.
- the magnetic marker 100 further includes a first connecting portion 115 in which a longitudinal end 110b of the first rod 110 and a longitudinal end 120a of the second rod 120 are rotatably connected; It also has a second connecting portion 125 to which the end 120b and the longitudinal end 130a of the third rod are rotatably connected.
- first connecting portion 115 includes members other than the first rod 110 and the second rod 120, those members may also be made of ferromagnetic material.
- the shaft may also be made of a ferromagnetic material.
- the shaft is small, it need not be ferromagnetic.
- the magnetic marker 100 is inserted into the hole 210 and magnetized so that the direction of the magnetic field is reversed at the first connecting portion 115 . Since the magnetic marker 100 is inserted into the hole 210 in FIG. 1, it is linear as shown in FIG. Also shown in FIG. 1 is pushing means 510 for pushing the magnetic marker 100 out of the hole 210 .
- the pushing means 510 may be included in the magnetic marker set 10 or may be configured not to be included in the magnetic marker set 10 .
- the pushing means 510 may be an independent jig used when using the magnetic marker set 10 .
- the length should be about 3 mm and the thickness should be about 1 mm in diameter.
- the dimensions of the magnetic marker 100 may be determined in consideration of easiness of arrangement and easiness of detection according to the purpose of use.
- FIG. 7 shows the magnetic marker 100 inserted into the hole 210.
- the magnetic marker set 10 also includes an approaching mechanism 140 that brings the longitudinal end 110 a of the first rod 110 and the longitudinal end 130 b of the third rod 130 closer together when the magnetic marker 100 is pushed out of the hole 210 .
- an approximation mechanism 140 utilizing a thread 143 and a pushing means 510 having a cutting means 550 for cutting the thread.
- it is not limited to the approach mechanism 140 using the thread 143 shown in FIG. You may make it approach the end 130b of a direction.
- “Approaching” means not only bringing the longitudinal end 110a of the first rod 110 and the longitudinal end 130b of the third rod 130 closer to each other until they come into contact with each other, but also bringing them close to each other.
- the first rod, the second rod, and the third rod may be brought close together so that they are arranged in a substantially triangular shape.
- the approach mechanism 140 may be included in the magnetic marker set 10 as a separate entity from the magnetic marker 100, or the magnetic marker 100 itself may include the approach mechanism 140.
- the magnetic marker set 10 may be provided with the approach mechanism 140 as a separate member from the magnetic marker 100 .
- the magnetic marker 100 itself may be provided with a function (approaching mechanism 140) to transform into a triangle.
- the longitudinal end 110a of the first rod 110 and the longitudinal end 130b of the third rod 130 are in contact (the first rod 110, the second rod 120, and the third rod 130 are arranged in a triangular shape). state).
- the longitudinal end 110a of the first rod 110 may be ball-shaped and fitted into a slit formed in the longitudinal end 130b of the third rod 130.
- a structure may be employed in which a hook is provided on the longitudinal end 110a of the first rod 110 and fitted into a hole formed in the longitudinal end 130b of the third rod 130.
- FIG. 8 shows a state in which the first rod 110 is pushed out using the pushing means 510 while tension is applied to the thread 143 .
- FIG. 9 shows a state in which the first rod 110 and the second rod 120 are pushed out using the pushing means 510 while tension is applied to the thread 143 .
- FIG. 10 shows a state in which the entire magnetic marker 100 is pushed out using the push-out means 510 while tension is applied to the thread 143 .
- approximation mechanism 140 has thread 143 disposed within hole 210 .
- the magnetic markers 100 are arranged so that the first rod 110, the second rod 120, and the third rod 130 are pushed out from the hole 210 in this order.
- One end of the thread 143 is fixed to the fixing portion 141 of the longitudinal end 110a of the first rod 110, and the thread 143 is movably held by the holding portion 142 of the longitudinal end 130b of the third rod .
- “Freely moveable” means that the thread can move freely in the longitudinal direction, like a thread passed through a hole, but is held in the position of the hole (free to move in the longitudinal direction). held in a particular position).
- the approach mechanism 140 is composed of a thread 143 , a fixing portion 141 and a holding portion 142 .
- the approximation mechanism 140 may also have a mechanism for applying tension to the thread 143 .
- the magnetic markers 100 may be arranged so that the third rod 130 , the second rod 120 , and the first rod 110 are pushed out from the hole 210 in this order.
- one end of the thread 143 is fixed to the fixing portion 141 of the longitudinal end 130b of the third rod 130, and the thread 143 is movably held by the holding portion 142 of the longitudinal end 110a of the first rod 110. All you have to do is
- FIG. 11 is a diagram showing a state in which the first connecting portion and the second connecting portion are configured by coil-shaped elastic bodies, and the first rod, the second rod, and the third rod are arranged in a straight line.
- FIG. 12 is a diagram showing a state in which the first connecting portion and the second connecting portion are composed of coil-shaped elastic bodies, and the first, second, and third rods are arranged in a triangular shape.
- the coiled elastic body 135 is wound around the first, second and third rods.
- the portion that connects the first rod and the second rod of the elastic body 135 is the first connection portion 115
- the portion that connects the second rod and the third rod of the elastic body 135 is the second connection portion.
- the first connection portion 115 and the second connection portion 125 can also be configured with such a structure.
- the fixing portion 141 and the holding portion 142 may be formed on the elastic body 135 .
- the pushing means 510 shown in FIGS. 7 to 10 is composed of an inner cylinder 520 and an inner cylinder 530.
- the inner cylinder 520 has an inner cylinder side hole 521 and the inner cylinder 530 has an inner cylinder side hole 531 .
- the inner cylinder side hole 521 and the inner cylinder side hole 531 constitute a cutting means 550 .
- the inner cylinder side hole 521 and the inner cylinder side hole 531 can be arranged at positions facing each other and at positions not facing each other.
- FIG. 13 is a front view showing a state in which the inner cylinder side hole 521 and the inner cylinder side hole 531 are arranged at opposing positions.
- FIG. 13 is a front view showing a state in which the inner cylinder side hole 521 and the inner cylinder side hole 531 are arranged at opposing positions.
- FIG. 14 is a plan view showing a state in which the inner cylinder side hole 521 and the inner cylinder side hole 531 are arranged at positions facing each other.
- the thread 143 passes through the inner cylinder side hole 521 and the inner cylinder side hole 531 .
- FIG. 15 is a plan view showing a state in which the side hole 521 of the inner cylinder and the side hole 531 of the inner cylinder are arranged so as not to face each other.
- the state of FIG. 14 can be changed to the state of FIG.
- the thread 143 can be cut by positioning the inner cylinder side hole 521 and the inner cylinder side hole 531 so as not to face each other.
- the cutting means for cutting the thread 143 is not limited to this configuration.
- Different configurations may be used for cutting, such as placing sharp jigs.
- Other configurations may be used as long as the thread 143 can be cut after the magnetic marker 100 is pushed out of the hole 210 and the longitudinal end 110a of the first rod and the longitudinal end 130b of the third rod are brought into contact with each other.
- FIG. 16 shows an example of the operation part of the pushing means. Although the specific internal structure of the push-out means 510 is not shown, it may have an operation section 500 for the user to hold on the right side of FIGS. 7 to 10 .
- the operation unit 500 has a knob 570 .
- FIG. 16 also shows an enlarged view of the knob 570 and the slit 560 .
- the user rotates the knob 570 along the slit 560 by 90 degrees to push out the magnetic marker 100 .
- the magnetic marker 100 is pushed out from the hole 210 by moving the tab in the longitudinal direction along the slit 560 .
- the inner tube 530 is rotated and the thread 143 is cut.
- the thread 143 can be tensioned by connecting it to the inside of the end portion 580 via an elastic body.
- FIG. it is not limited to the configuration of FIG. Other configurations are also possible.
- FIG. 17 shows a configuration for magnetizing the magnetic marker.
- FIG. 18 shows the state of the magnetic field of the permanent magnet.
- FIG. 19 is a diagram showing the state of the magnetic flux density near the center line of the permanent magnet.
- the magnetic marker set 10 shown in FIG. 17 also comprises permanent magnets 300 and storage means 400 .
- the permanent magnet 300 has a plate shape with an N pole on one side and an S pole on the other side, and has a slit 310 penetrating from one side to the other side.
- the storage means 400 holds the needle 200 with the magnetic marker 100 inserted into the slit 310 so that one of the surfaces of the permanent magnet 300 is aligned with the position of the first connecting portion 115 .
- the thickness of the permanent magnet 300 is desirably about the same as the length of the second rod 120, but may be 1/2 or more of the length of the second rod 120.
- the thickness of the permanent magnet 300 should be equal to or greater than the length of the second rod 120 and equal to or less than the sum of the length of the second rod 120 and half the length of the third rod.
- the needle 200 should be inserted so that the second rod 120 is positioned within the slit 310 .
- the first rod 110, the second rod 120, and the first connecting portion 115 are made of ferromagnetic material.
- the coercive force of these materials is desirably 100 Oe or more.
- a magnetic material having a strong coercive force and residual magnetization properties is desirable because it is easier to maintain the magnetized magnetic field.
- the horizontal axis of FIG. 19 indicates the position of the Z-axis, and the vertical axis indicates the magnetic flux density. For example, for breast cancer, sufficient magnetization can be achieved by setting the maximum positive magnetic flux density to 80 millitesla (mT) and the maximum negative magnetic flux density to -200 millitesla (mT).
- FIG. 20 shows another configuration for magnetizing the magnetic marker.
- the permanent magnet 300 shown in this figure does not have slits 310 .
- the permanent magnet 300 has a plate-like shape with an N pole on one side and an S pole on the other side.
- the housing means 400 is arranged such that the position of the first connecting portion 115 is on the same plane as one of the surfaces of the permanent magnet 300 and the normal direction of the plane coincides with the longitudinal direction of the second rod 120 . , holds the needle 200 in which the magnetic marker 100 is inserted. In both cases of FIG. 17 and FIG. 20, the needle 200 is held so that the second rod 120 is positioned at the permanent magnet 300 .
- FIG. 20 shows one permanent magnet 300 , multiple permanent magnets 300 may be arranged around the needle 200 .
- the magnetization method shown in FIG. 17 is considered preferable as a method for magnetizing the magnetic marker 100 .
- the magnetization method shown in FIG. 20 may be used as long as it can be sufficiently magnetized.
- FIG. 21 shows the state of the magnetic field inside the magnetic marker in a magnetized state.
- FIG. 22 shows a state in which the first rod, the second rod, and the third rod are arranged in a triangle (the other longitudinal end of the first rod and the other longitudinal end of the third rod are in contact).
- the magnetic marker set 10 the magnetic marker 100 is pushed out from the needle 200, and the longitudinal end 110a of the first rod 110 and the longitudinal end 130b of the third rod 130 come into contact.
- the first rod 110, the second rod 120, and the third rod 130 form a triangle.
- FIG. 23 shows the result of observing the magnetic flux density from the upper side of FIG. 22 using the apparatus for detecting magnetic markers disclosed in Patent Document 2.
- the horizontal axis indicates the distance from the probe head of the magnetic marker detection device to the magnetic marker, and the vertical axis indicates the magnetic flux density. It can be seen that when magnetized as shown in FIG. 22, the magnetic flux is easily detected even if the distance from the probe is long.
- the surface of the needle 200 may be processed to change the reflection characteristics of ultrasonic waves in a predetermined pattern.
- FIG. 24 shows a state in which an object is pierced with a needle having a pattern that changes the reflection characteristics of ultrasonic waves and detected by ultrasonic waves. It can be seen that the tips 221 and 222 of the needle 200 and the pattern can be detected. In this way, if the needle is provided with a pattern that changes the reflection characteristics of the ultrasonic waves, the position where the magnetic marker 100 is arranged can be easily recognized. Similarly, the magnetic marker 100 may be processed to change the reflection characteristics of ultrasonic waves in a predetermined pattern.
- the arrangement state of the magnetic markers 100 can be recognized when the magnetic markers 100 are arranged.
- Both the needle 200 and the magnetic marker 100 may be processed to change the reflection characteristics of ultrasonic waves in a predetermined pattern, or only one of them may be processed.
- FIG. 25 shows the processing flow of the magnetic marker arrangement method. Steps indicated by dotted lines are steps that may not be necessary.
- the magnetic marker 100 may be magnetized in advance, or may be used after being magnetized by the user himself/herself.
- the user arranges the permanent magnet 300 as shown in FIG. 17 or 20 to magnetize the magnetic marker 100 (S10: step).
- the magnetic marker set 10 including the permanent magnet 300 may also be distributed.
- the user removes the needle 200 from the permanent magnet 300 (S20: needle removal step).
- a magnetized magnetic marker set 10 that does not include the permanent magnet 300 may be distributed.
- the user pierces the object with the needle 200 with the magnetic marker 100 inserted into the hole 210 so that the tip 221 of the needle 200 is at the position where the magnetic marker 100 is to be placed (S30: needle insertion step).
- the user sticks the needle 200 into the breast so that the tip 221 is at the location of the breast cancer.
- the magnetic marker 100 is pushed out from the hole 210 so that the first connecting part 115 faces the direction of the device detecting the magnetic marker 100 (S40: pushing step).
- the magnetic marker 100 should be pushed out so that the first connecting portion 115 faces the outside of the breast.
- the needle In the needle insertion step (S30), the needle is inserted so that the pushed-out first connecting portion 115 faces the outside of the breast. may be in a state where there is no Then, when the thread 143 is used as the approach mechanism 140, the thread 143 is cut (S50: cutting step).
- Magnetic Marker Set 100 Magnetic Marker 110 First Rod 115 First Connection Part 120 Second Rod 125 Second Connection Part 130 Third Rod 135 Elastic Body 140 Approach Mechanism 141 Fixing Part 142 Holding Part 143 Thread 200 Needle 210 Holes 221, 222 Tip 300 Permanent magnet 310 Slit 400 Storage means 500 Operation part 510 Pushing means 520 Inner cylinder 521 Inner cylinder side hole 530 Inner cylinder 531 Inner cylinder side hole 550 Cutting means 560 Slit 570 Knob 580 End
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Abstract
Description
特許文献1,2に示された発明は、乳がんなどの位置を示すためのマーカに関する技術である。本発明も乳がんの位置を示すことを目的として含んでいるが、他の位置を示す目的に利用してもよい。例えば、人を対象とするのではなく、動物を対象とする利用も含まれる。また、生物以外を対象としてもよい。図1に磁性マーカセットの構成例を示す。図2は、磁性マーカの構成例であり、第1ロッド、第2ロッド、第3ロッドが直線状に配置された例を示している。図3は、磁性マーカの構成例であり、第1ロッド、第2ロッド、第3ロッドが三角形に配置された例を示している。図4は第1ロッドの形状の例、図5は第2ロッドの形状の例、図6は第3ロッドの形状の例を示している。図4(A)、図5(A)、図6(A)は正面図である。図4(B)、図5(B)、図6(B)は左側面図である。図4(C)、図5(C)、図6(C)は平面図である。
図17に、磁性マーカを着磁させる構成を示す。図18に永久磁石の磁界の様子を示す。図19は永久磁石の中心線付近での磁束密度の様子を示す図である。図17に示す磁性マーカセット10は、永久磁石300と収納手段400も備える。永久磁石300は、一方の面がN極、他方の面がS極の板状であり、一方の面から他方の面に貫通したスリット310を有する。
図25に磁性マーカ配置方法の処理フローを示す。点線で示したステップは、不要な場合もあるステップである。磁性マーカ100は、あらかじめ着磁しておいてもよいし、使用者自身が着磁させた後に使用してもよい。着磁していない磁性マーカ100が針200に挿入されている場合は、使用者は、永久磁石300を図17もしくは図20のように配置し、磁性マーカ100に着磁させる(S10:着磁ステップ)。図17のように、永久磁石300も含んだ磁性マーカセット10を流通させてもよい。この場合は、使用者は永久磁石300から針200を取り外す(S20:針取り出しステップ)。永久磁石300を含まない着磁済の磁性マーカセット10を流通させてもよい。使用者は、磁性マーカ100が穴210に挿入された針200を、針200の先端221が磁性マーカ100を配置したい位置になるように対象物に刺す(S30:針挿入ステップ)。例えば、使用者は、針200を、先端221が乳がんの位置になるように乳房に刺す。その後、第1接続部115が磁性マーカ100を探知する装置の方向に向くように穴210から磁性マーカ100を押し出す(S40:押し出しステップ)。例えば、磁性マーカ100を乳房内に配置するのであれば、第1接続部115が乳房の外側に向くように磁性マーカ100を押し出せばよい。なお、針挿入ステップ(S30)で、押し出した第1接続部115が乳房の外側に向くように針を刺しておくことで、押し出しステップ(S40)では第1接続部115の向きを意識する必要がない状態にしてもよい。そして、接近機構140として糸143を利用している場合は、糸143を切断する(S50:切断ステップ)。
110 第1ロッド 115 第1接続部
120 第2ロッド 125 第2接続部
130 第3ロッド 135 弾性体
140 接近機構 141 固定部
142 保持部 143 糸
200 針 210 穴
221,222 先端 300 永久磁石
310 スリット 400 収納手段
500 操作部 510 押し出し手段
520 内筒 521 内筒側面穴
530 内々筒 531 内々筒側面穴
550 切断手段 560 スリット
570 つまみ 580 端部
Claims (11)
- 棒状の残留磁化特性を有する磁性体で形成された第1ロッドと第2ロッドおよび、棒状の第3ロッドを有する磁性マーカと、長手方向に穴を有する針とを備える磁性マーカセットであって、
前記磁性マーカは、
前記第1ロッドの長手方向の一端と前記第2ロッドの長手方向の一端とが回転自在に接続された第1接続部と、
前記第2ロッドの長手方向の他端と前記第3ロッドの長手方向の一端とが回転自在に接続された第2接続部も
有し、
前記磁性マーカは、前記穴に挿入され、前記第1接続部において磁界の方向が逆転するように着磁されており、
前記磁性マーカセットは、
前記磁性マーカが前記穴から押し出されたときに前記第1ロッドの長手方向の他端と前記第3ロッドの長手方向の他端とを接近させる接近機構も備える
ことを特徴とする磁性マーカセット。 - 請求項1記載の磁性マーカセットであって、
前記第1接続部と前記第2接続部は、コイル状の弾性体で構成されている
ことを特徴とする磁性マーカセット。 - 請求項1または2記載の磁性マーカセットであって、
前記接近機構は、前記穴内に配置された糸を有し、
前記磁性マーカは、前記第1ロッド、前記第2ロッド、前記第3ロッドの順番で前記穴から押し出されるように配置されており、前記糸の一端は前記第1ロッドの長手方向の他端に固定され、前記糸は前記第3ロッドの長手方向の他端に移動自由に保持されている
ことを特徴とする磁性マーカセット。 - 請求項3記載の磁性マーカセットであって、
前記糸を切断する切断手段も備える
ことを特徴とする磁性マーカセット。 - 請求項4記載の磁性マーカセットであって、
前記穴内に配置された内筒と、前記内筒内に配置された内々筒も有し、
前記切断手段は、前記内筒の側面に形成された内筒側面穴と、前記内々筒の側面に形成された内々筒側面穴で構成され、
前記内筒側面穴と前記内々筒側面穴とが対向する位置に配置されている状態で、前記糸は前記内筒側面穴と前記内々筒側面穴を通っており、
前記内筒側面穴と前記内々筒側面穴とが対向しない位置にすることで、前記糸を切断する
ことを特徴とする磁性マーカセット。 - 請求項1から5のいずれかに記載の磁性マーカセットであって、
前記針及び前記磁性マーカ、もしくは前記針と前記磁性マーカの一方には、あらかじめ定めたパターンで超音波の反射特性が変化するように加工が施されている
ことを特徴とする磁性マーカセット。 - 請求項1から6のいずれかに記載の磁性マーカセットであって、
一方の面がN極、他方の面がS極の板であり、一方の面から他方の面に貫通したスリットを有する永久磁石と、
前記第1接続部の位置に前記永久磁石のいずれかの面が一致するように、前記磁性マーカが挿入された前記針を前記スリットに挿入した状態で保持する収納手段も
備える
ことを特徴とする磁性マーカセット。 - 請求項1から6のいずれかに記載の磁性マーカセットであって、
一方の面がN極、他方の面がS極の板状の永久磁石と、
前記第1接続部の位置が前記永久磁石のいずれかの面と同一の面上であり、かつ前記面の法線方向と前記第2ロッドの長手方向が一致するように、前記磁性マーカが挿入された前記針を配置した状態で保持する収納手段も
備える
ことを特徴とする磁性マーカセット。 - 請求項7または8記載の磁性マーカセットであって、
前記永久磁石の厚さは、前記第2ロッドの長さの1/2以上であり、
前記針は、前記第2ロッドが前記永久磁石の位置になるように保持されている
ことを特徴とする磁性マーカセット。 - 請求項1から9のいずれかに記載の磁性マーカセットであって、
前記磁性マーカを前記針から押し出す押し出し手段も備える
ことを特徴とする磁性マーカセット。 - 請求項1から10のいずれかに記載の磁性マーカセットを用いた磁性マーカ配置方法であって、
前記磁性マーカが前記穴に挿入された状態で、前記針の先端が前記磁性マーカを配置したい位置になるように、前記針を刺す針挿入ステップと、
前記第1接続部が前記磁性マーカを探知する装置の方向に向くように前記穴から前記磁性マーカを押し出す押し出しステップと、
を実行する磁性マーカ配置方法。
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CN202180096073.3A CN117098495A (zh) | 2021-07-30 | 2021-07-30 | 磁性标记集、磁性标记配置方法 |
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US20080269601A1 (en) * | 2007-04-26 | 2008-10-30 | Schwamb John P | Fiducial marker with rings |
JP2012531276A (ja) * | 2009-06-26 | 2012-12-10 | シアナ メディカル,インク. | 身体内のマーカあるいは組織構造を位置決めする装置、システム及び方法 |
JP2017521223A (ja) * | 2014-07-23 | 2017-08-03 | ジーアイ ウィンドウズ, インコーポレイテッド | 磁気吻合デバイスおよび送達の方法 |
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JP2019146957A (ja) * | 2018-01-25 | 2019-09-05 | エンドマグネティクス リミテッド | 外科用ガイダンスのために磁性マーカを検出するためのシステムおよび方法 |
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DE102019210963A1 (de) | 2019-07-24 | 2021-01-28 | Bip Biomed.-Instrumente & Produkte Gmbh | Implantierbarer Marker |
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US20080269601A1 (en) * | 2007-04-26 | 2008-10-30 | Schwamb John P | Fiducial marker with rings |
JP2012531276A (ja) * | 2009-06-26 | 2012-12-10 | シアナ メディカル,インク. | 身体内のマーカあるいは組織構造を位置決めする装置、システム及び方法 |
JP2017521223A (ja) * | 2014-07-23 | 2017-08-03 | ジーアイ ウィンドウズ, インコーポレイテッド | 磁気吻合デバイスおよび送達の方法 |
JP2018526160A (ja) * | 2015-06-04 | 2018-09-13 | エンドマグネティクス リミテッド | 磁性マーカ局在化(mml)のためのマーカ材料 |
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