CN109363769B - Magnetic resonance positioning device and positioning method - Google Patents
Magnetic resonance positioning device and positioning method Download PDFInfo
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- CN109363769B CN109363769B CN201811342658.5A CN201811342658A CN109363769B CN 109363769 B CN109363769 B CN 109363769B CN 201811342658 A CN201811342658 A CN 201811342658A CN 109363769 B CN109363769 B CN 109363769B
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
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- 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
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B2034/2046—Tracking techniques
- A61B2034/2051—Electromagnetic tracking systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The utility model relates to a magnetic resonance positioning device and a positioning method; the positioning device comprises a positioning layer, wherein the positioning layer is provided with positioning points which are arranged in a rectangular lattice, and the number of rows and the number of columns of the rectangular lattice are the same; each positioning point is fixed with a group of developer; the developers on one diagonal line of the rectangular dot matrix are M teams, the developers on the other locating points are N teams, and the magnetic resonance development results of the M teams are different from those of the N teams. The utility model makes the locating point easier to identify by creative team setting of the developer, solves the problems of difficult locating and easy error in the prior art, and has positive technical significance.
Description
Technical Field
The utility model relates to a magnetic resonance positioning device and a positioning method, and belongs to the technical field of medical detection devices and methods.
Background
In clinical medical examination, in order to accurately locate the position of a lesion in a body, the formulation and implementation of a surgical scheme are facilitated, and a locating device is often required to be used.
In radiological examination such as fluoroscopy, flexible surgical positioners made of metallic materials have been developed. The principle is that the image of the operation locator is overlapped with the image of the patient's body on the screen and the film by setting the gridding structure by utilizing the characteristics that the metal material has high density and can display the image on the screen and the film after being irradiated by radioactivity, thereby locating the focus according to the gridding. For positioning, some positioners use the characteristics of metal and the sensitivity of X-ray to metal, and the line numbers are marked on the grid line end by the numerical materials of the metal.
In Magnetic Resonance (MRI) examinations, the same positioning device cannot be used. Because of different operation mechanisms, the metal material is not suitable for entering the magnetic resonance machine, and cannot play a developing effect; and therefore can only be developed using a suitable magnetic resonance imaging agent. Meanwhile, the image of the magnetic resonance is tomographic scanning, and in the obtained scanned image, the positioning grid of the plane is difficult to calibrate the position of the tomographic image, and at most, only the cross section of the positioning grid can be displayed.
The patent document with the publication number of CN2759422Y discloses an utility model named as a magnetic resonance liver focus body surface positioning belt, which adopts the following technical scheme: the magnetic resonance liver focus body surface positioning belt is formed by stitching a transverse non-woven fabric belt and a longitudinal non-woven fabric belt, and nylon buckles are arranged at two ends of the transverse non-woven fabric belt; a longitudinal body surface positioning hose is fixed on the inner side of the longitudinal non-woven fabric belt in the middle part, and cod liver oil pills are also arranged in the longitudinal body surface positioning hose.
According to the scheme, a hose for arranging cod-liver oil pills is used as a calibration line, and the positioning hose is adjusted through the sliding sleeve, so that the cod-liver oil pill image in the scanned image corresponds to the focus position, and the effects of calibrating the focus position and reducing the repeated puncture times are achieved; although this approach primarily solves the localization problem in Magnetic Resonance (MRI) examinations, the following disadvantages exist: the calibration lines lack personalized marks, so that the positions of one direction (namely, the direction perpendicular to the image layer surface, which can be called as a column direction and respectively called as column 1 and column 2 …, and the corresponding calibration lines only show a single cod liver oil pill in the image) can be intuitively calibrated; when the method is applicable to a small range, when only 2 and 3 calibration lines (the calibration line direction can be called as a row direction, and the corresponding calibration lines are respectively called as row 1 and row 2 …) parallel to the image layer surface, developing lines composed of developer and appearing at intervals in continuous change of the image layer surface can be conveniently deduced according to the scanning sequence to which region the layer surface belongs (for example, between row 2 or row 1 and row 2 lines); when the method is suitable for a large range, because the number of the calibration lines (row 1 and row 2 …) parallel to the image layers is large, the situation that the focus area is positioned in which row or between which two rows the layer belongs needs to be determined by counting all layer images one by one from row 1 is needed, so that time is consumed, and the situation that the positioning error is caused by counting error is extremely easy to occur.
Said disadvantage has not been reported to date as a solution.
Therefore, designing a magnetic resonance positioning device and a positioning method that can solve the above-mentioned drawbacks is a problem to be solved by those skilled in the art.
Disclosure of Invention
The utility model provides a magnetic resonance positioning device and a positioning method, which are used for solving the problems that the positioning of the magnetic resonance positioning device is difficult and accurate coordinates can be determined only by counting all tomograms.
The utility model adopts the following technical scheme:
a magnetic resonance positioning device comprises a positioning layer,
the positioning layer is provided with positioning points which are arranged in a rectangular lattice, and the number of rows and the number of columns of the rectangular lattice are the same;
each positioning point is fixed with a group of developer;
the developers on one diagonal line of the rectangular dot matrix are M teams, the developers on the other locating points are N teams, and the magnetic resonance development results of the M teams are different from those of the N teams.
Preferably, the positioning layer is made of a flexible material which is convenient to cling to the body surface;
the developer is a solid or liquid unit with limited appearance, and is made of grease or hydrogel;
m teams differ from N teams in shape or number of developer development results;
the row number and the column number of the rectangular dot matrix are counted from one end of the diagonal;
the distances between rows and columns of two adjacent positioning points are equal.
Preferably, the M-team developer and the N-team developer use the same developer particles, wherein the M-team number is M and the N-team number is N; m is not equal to n.
Preferably, the developer particles are soft capsules or solid grease blocks of grease or hydrogel; the line number and the column number of the locating point are counted from the upper left corner; the diagonal line starts from the upper left corner.
Preferably, the positioning layer is a double-layer film laminated in vacuum; the developer is positioned between the double-layer coating films, and the positions or the shapes of the double-layer coating films are limited by the laminated coating films.
Preferably, the positioning layer is in a hollowed-out mode which is convenient for directly performing puncturing or marking operation, and the hollowed-out mode is an interline mode, a grid mode or a sieve mode.
Preferably, the positioning device further comprises a fixing layer connected to one side of the positioning layer; the fixing layer comprises an adhesive layer with adhesiveness and a protective layer for protecting the adhesiveness of the adhesive layer.
Preferably, the positioning points are 9*9 square lattice; m is 2, n is 1; the line spacing of the positioning points is equal to 1 time or 2 times of the thickness of the magnetic resonance scanning layer.
Preferably, the positioning layer is a paper or film permeable to the marking ink.
A magnetic resonance positioning method using the positioning device comprises the following steps:
step 1: laying the positioning device on the body surface of the object before magnetic resonance scanning;
step 2: after magnetic resonance scanning is carried out, a layer surface to be injected is determined according to a scanning image with a focus;
step 3: judging the row of the needle layer to be inserted according to the position of the M double developers;
step 4: carrying out path design on a layer surface to be needle-inserted, and determining a row where a puncture point is located or is adjacent to according to a target point to be punctured;
step 5: the location of the puncture point is determined on the positioning layer based on the row and column data.
The utility model has the following advantages:
(1) The line number or the column number of the rectangular dot matrix is indirectly marked by respectively arranging M groups of developers and N groups of developers which are obviously different in the rectangular dot matrix of the developer; when the positioning is needed, the serial number of the row or the column can be immediately obtained only by seeing the position of the developer belonging to the M group in the row or the column, so that the positioning is convenient and quick;
(2) By arranging the positioning layer to be hollow, puncture or marking operation can be performed without removing the positioning device or removing the positioning device in a large area, so that the positioning is more accurate;
(3) Through setting up the layer of pasting, make positioner laminate in scanning object body surface better, avoided the displacement to cause the position deviation.
Drawings
FIG. 1 is a schematic view of the structure of embodiment 1 of the present utility model;
wherein: 1. positioning layer, developer and positioning point.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
Example 1:
as shown in fig. 1, the present embodiment is a positioning device using the magnetic resonance positioning method, including a positioning layer 1 and a developer 2;
the positioning layer 1 is a flexible layer which can be adhered to the surface of a human body, and positioning points 3 which are arranged in a 9*9 square lattice are arranged; the horizontal and longitudinal distances of each adjacent positioning point 3 are 1cm, which means that the distances between the rows and the columns of the lattice are equal; each positioning point 3 has a set of developer 2 fixed thereto. The developer 2 is a solid or liquid unit with a limited shape, and spherical soft capsule particles of cod liver oil or hydrogel are used in this embodiment. This choice is mainly to use common materials. In the square rectangular lattice, the rows are transversely arranged, and the columns are vertically arranged.
When the locating point 3 is only provided with 1 particle of the developer 2, the center of the particle is the center of the locating point 3; when the positioning point 3 is provided with 2 particles of the developer 2, the middle point of the 2 particles is the center of the positioning point 3.
In this embodiment, the line number and the column number of the positioning point 3 are all counted from the upper left corner, the line number is 1, 2, 3, … … and 9 from the upper left corner downwards, and the column number is 1, 2, 3, … and 9 from the upper left corner to the right. The number of particles of the developer 2 in each group is not exactly the same, and includes two types: the developer located at the diagonal line from the upper left corner along the anchor points is M fleets, and the developer located at the rest anchor points are N fleets. In this embodiment, the M groups of developer are set to have 2 particles juxtaposed (2 developer particles are simultaneously displayed in the scanned image), and the N groups are set to have 1 particle; this clearly distinguishes the development effect of the M-team developer from that of the N-team developer, and can be recognized at the fastest speed when viewed. In other embodiments, the M-team and N-team developers may be configured to respectively use particles having different cross-sectional shapes, and the effect of rapid recognition in the developed image may be achieved.
Through setting up M group's developer (the single group developer in the team is called M developer) and N group's developer (the individual developer in the team is called N developer) respectively in the developer rectangular lattice, make each row and each row of rectangular lattice obtain indirect mark-M developer's row number and column number the same, when needs the location, only need see M developer in the serial number of position in this row, can learn the serial number of this row immediately, convenient and fast.
The positioning layer 1 is a double-layer film laminated in vacuum; the developer 2 is positioned between the double-layer coating films and limited by the laminated coating films; the location of the developer 2 in the coating can be regarded as the location point 3. In order to ensure the positioning effect, a groove for accommodating particles of the developer 2 may be prepared at the positioning point 3 of the double-layer film. The positioning device can be more conveniently produced in a large scale, and the cost is reduced, so that the positioning device can be used as a disposable article and meets the requirements of medical sanitation.
As a preferred implementation form, a fixing layer is also integrally connected to one side of the positioning layer 1; the fixing layer is completely overlapped with the positioning layer 1 and has the same shape, and comprises an adhesive bonding layer with adhesiveness and a protective layer for protecting the adhesiveness of the bonding layer. Through setting up the layer of pasting, make positioner laminate in human surface better, avoided the displacement to cause the position deviation.
The adhesive layer is made of self-adhesive material and is directly coated on the inner side of the positioning layer 1; the protective layer is a self-adhesive protective layer, and can be conveniently removed without damaging the adhesive layer when in use.
In order to facilitate the puncturing or marking operation, in this embodiment, the positioning layer 1 adopts a network-type hollowed-out manner; in other embodiments, the hollowed-out mode may be changed into an inter-column mode (one parallel to the columns is cut out between two adjacent columns), an inter-row mode (one parallel to the rows is cut out between two adjacent rows), or a sieve-mesh mode (the rest parts except the positioning point positions are uniformly perforated, and thin connecting parts among holes are reserved). When the positioning device is used, compared with an inter-column type and an inter-row type, the grid hollowed-out mode is adopted, so that the overall accuracy of the positioning device is more convenient to maintain. Besides the square grid form shown in fig. 1, a grid with a hollowed-out shape as a rectangle can be adopted, and one grid can span a plurality of positioning points in the line or the column. The edge of the hollowed-out part can also be used as an operation starting point of the cutting-out positioning device. When the connection part of the grid shields the position to be punctured or marked, the corresponding part can be conveniently sheared off, and the whole positioning is not influenced.
In the production of the positioning device of the embodiment, the positioning layer 1, the adhesive layer and the protective layer are all integral; the positioning layer 1 is a two-layer vacuum film, and grooves for placing capsule particles of the developer 2 are pre-pressed at the positions of the positioning points 3 respectively; in the mold used in the vacuum lamination, the lower mold also adopts a flat plate with a groove, the upper mold can adopt a flat plate corresponding to the lower mold, and also can adopt a roller type, grooves corresponding to the capsule particles of the developer 2 are respectively arranged on the surface of the flat plate or the roller surface, so that only the directly attached vacuum film is applied in the lamination process, and the developer 2 is not pressed. After the vacuum lamination is completed, the laminated positioning layer 1 is subjected to the operations of coating an adhesive layer and applying a protective layer; and then hollowing out and cutting the whole body to obtain the positioning device. As a more preferable embodiment, reinforcing ribs can be arranged at the row and the position, and the reinforcing ribs can be made of the same flexible material, such as a film-coated strip which is stuck on the outer side of the positioning layer 1 and made of the same material; the strength of the positioning layer provided with the reinforcing ribs is larger, so that the area of hollowed-out excision can be larger.
As a simple implementation manner, in the magnetic resonance positioning device in this embodiment, the positioning layer 1 may be made of rubberized fabric; forming a grid shape by 9 groups of rubberized fabrics which are staggered horizontally and vertically; each set of rubberized fabric comprises 2 opposite rubberized fabrics, and one set of developer particles is fixed at the node of each grid structure (namely the crossing position of the two sets of rubberized fabrics) through gluing.
Currently, there are paper or membrane materials such as MBR ultrafiltration membranes or water permeable membranes that allow the marking ink to permeate; as another embodiment of the utility model, such ultrafiltration membrane or water permeable membrane is used as the positioning layer 1, the capsule particles of the developer 2 are fixed at the position of the positioning point 3 in a bonding mode, and the positioning layer 1 is stuck to the body surface in an adhesive mode during scanning; when the needle insertion position is required to be marked on the body surface, the surface layer of the positioning device is directly marked without removing or shearing the positioning device, the marking ink can infiltrate into the body surface through the interlayer, and marks are left; the positioning device can be removed after marking without affecting the presence of the mark on the body surface.
The embodiment also includes a magnetic resonance positioning method using the positioning device of the embodiment, the method including the following steps:
step 1: laying the positioning device on the body surface of the object before magnetic resonance scanning;
when laying, the line of the positioning point is parallel to the scanning layer (also called developing layer and image layer), the column is perpendicular to the scanning layer, and the starting point of the column is positioned in the starting direction of scanning.
Step 2: after magnetic resonance scanning is carried out, a layer surface to be injected is determined according to a scanning image with a focus;
during scanning, the thickness of a scanning layer in the magnetic resonance instrument can be set arbitrarily; for ease of understanding, the thickness of the scan layer is set to half the line spacing. The scanning start position is the 1 st row position.
In the embodiment, the row spacing is set to be 1cm, and the thickness of the scanning layer surface is set to be 5mm; the scanned image may be marked as line 1, line 1.5 (i.e., at the intermediate point between line 1 and line 2), line 2, line 2.5, and so on, and in all images, the images with developer and the images without developer appear at intervals, corresponding to the scan planes of the whole line and half line, respectively, and at most, only the adjacent image planes need to be checked, so that the line corresponding to the image planes can be accurately positioned without counting from the head.
Step 3: according to the position of the M developer, rapidly and accurately judging the row of the needle layer to be inserted;
step 4: and designing an advancing needle path at the surface of the to-be-advanced needle layer, and determining the row where the puncture point is located or is adjacent to according to the target point to be punctured.
Step 5: the location of the puncture point is determined on the positioning layer based on the row and column data.
And (5) integrating the data obtained in the step (3) and the step (4) to determine that the puncture point is positioned in the 1 st row and the 5 th column. And then marking the puncture points on the body surface by directly adopting an interlayer ink seepage mode or a mode of cutting off part of the positioning layer according to the characteristics of the positioning layer 1. If the target point is not just in a certain column, the puncture point can be determined according to the position relation and the distance between the target point and the certain column. The center of the positioning point 3 can be marked by drawing a circle around the center.
Example 2:
the positioning layer 1 of the present embodiment also adopts the same vacuum lamination double-layer coating as that of embodiment 1; the developer 2 is positioned between the double-layer coating films and limited by the laminated coating films; the position occupied by the developer 2 in the coating film can be regarded as a positioning point 3; a groove is also preformed in the film at the location of the anchor point 3.
This embodiment differs from embodiment 1 in that the developer 2 used is not a granulated pre-capsule, but a solid bolus of grease or a liquid droplet of grease contained in a pre-groove on the film; the shape of the groove defines the outer shape of the developer 2 filled therein. The cross sections of the grooves of the M groups and the N groups (on the scanned image) are different in shape, for example, the cross sections of the grooves of the M groups are triangular, and the cross sections of the grooves of the N groups are circular or square; in the scanned image, the positions of the M teams of developers can be quickly found through the different shadow shapes of the developers, and the quick identification and counting are also realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model, and the parts not described in detail and shown in partial detail may be applied to the prior art and are not described in detail herein. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Claims (6)
1. Magnetic resonance positioning device comprising a positioning layer (1), characterized in that:
the positioning layer (1) is provided with positioning points (3) which are arranged in a rectangular lattice, and the number of rows and the number of columns of the rectangular lattice are the same;
each positioning point (3) is fixed with a group of developer (2);
wherein the developer (2) positioned on one diagonal line of the rectangular lattice is M teams, the developers (2) of the rest positioning points (3) are N teams, the magnetic resonance development results of the M teams are different from those of the N teams, and the line numbers and the column numbers of the rectangular lattice are counted from one end of the diagonal;
the positioning layer (1) is made of a flexible material which is convenient to cling to the body surface;
the developer (2) is a solid or liquid unit with limited appearance, and is made of grease or hydrogel;
the development results of the M teams and the N teams of developers (2) are different in shape or number;
the distances between rows and columns of two adjacent positioning points (3) are equal;
the M teams of developer (2) and the N teams of developer (2) adopt the same developer (2) particles, wherein the M teams are M in number and the N teams are N in number; m is not equal to n;
the particles of the developer (2) are soft capsules or solid grease blocks of grease or hydrogel; the line number and the column number of the locating point (3) are counted from the upper left corner; the diagonal line starts from the upper left corner;
the positioning points (3) are 9*9 square lattice; m is 2, n is 1; the line spacing of the positioning points (3) is equal to 1 time or 2 times of the thickness of the magnetic resonance scanning layer.
2. Positioning device according to claim 1, characterized in that the positioning layer (1) is a vacuum-pressed double-layer film; the developer (2) is positioned between the double-layer coating films, and the positions or the shapes of the laminated coating films are limited.
3. The positioning device according to claim 1, wherein the positioning layer (1) is hollowed out to facilitate the puncturing or marking operation directly, and the hollowed out manner is interline, mesh or sieve.
4. Positioning device according to claim 1, characterized in that the positioning device further comprises a fixation layer connected to one side of the positioning layer (1); the fixing layer comprises an adhesive layer with adhesiveness and a protective layer for protecting the adhesiveness of the adhesive layer.
5. Positioning device according to claim 1, characterized in that the positioning layer (1) is a paper or film permeable to marking ink.
6. A magnetic resonance localization method using any one of the localization devices of claims 1 to 5, characterized by comprising the steps of:
step 1: laying the positioning device on the body surface of the object before magnetic resonance scanning;
step 2: after magnetic resonance scanning is carried out, a layer surface to be injected is determined according to a scanning image with a focus;
step 3: judging the row of the needle layer to be inserted according to the position of the M double developers;
step 4: designing a path on a layer to be needle-inserted, and determining a row where a puncture point is located or is adjacent to according to a target point to be punctured;
step 5: the location of the puncture point is determined on the positioning layer based on the row and column data.
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| CN201811342658.5A CN109363769B (en) | 2018-11-13 | 2018-11-13 | Magnetic resonance positioning device and positioning method |
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| CN201811342658.5A CN109363769B (en) | 2018-11-13 | 2018-11-13 | Magnetic resonance positioning device and positioning method |
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