EP3048969A1 - Rektalspule für magnet-resonanz-tomographie - Google Patents
Rektalspule für magnet-resonanz-tomographieInfo
- Publication number
- EP3048969A1 EP3048969A1 EP14799324.0A EP14799324A EP3048969A1 EP 3048969 A1 EP3048969 A1 EP 3048969A1 EP 14799324 A EP14799324 A EP 14799324A EP 3048969 A1 EP3048969 A1 EP 3048969A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- balloon
- rectal
- tube
- magnetic resonance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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
- A61B5/055—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
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/43—Detecting, measuring or recording for evaluating the reproductive systems
- A61B5/4375—Detecting, measuring or recording for evaluating the reproductive systems for evaluating the male reproductive system
- A61B5/4381—Prostate evaluation or disorder diagnosis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
- A61B5/6873—Intestine
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34084—Constructional details, e.g. resonators, specially adapted to MR implantable coils or coils being geometrically adaptable to the sample, e.g. flexible coils or coils comprising mutually movable parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/0241—Pointed or sharp biopsy instruments for prostate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3403—Needle locating or guiding means
- A61B2017/3405—Needle locating or guiding means using mechanical guide means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
- A61B2017/345—Cannulas for introduction into a natural body opening
- A61B2017/3452—Cannulas for introduction into a natural body opening for the rectum, e.g. for hemorrhoid surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
- A61B2560/02—Operational features
- A61B2560/0266—Operational features for monitoring or limiting apparatus function
- A61B2560/028—Arrangements to prevent overuse, e.g. by counting the number of uses
- A61B2560/0285—Apparatus for single use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
- A61B5/6852—Catheters
- A61B5/6853—Catheters with a balloon
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34007—Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system
Definitions
- the invention relates to a rectal coil for magnetic resonance tomography and an associated method for the use thereof according to the preamble of the independent claims 1 and 8.
- Rectal coils are already being used in magnetic resonance tomography to enable imaging, especially of the prostate, and to increase the resolution.
- rectal coil in the sense of the invention in this case means a device which has at least one electrical coil which is attached to a shaft and can thereby be pushed into the rectum. This electric coil detects the electromagnetic signals of the magnetic resonance tomography.
- the electric coil hereinafter referred to as coil, pushed in a radially compressed state through the rectum and expanded within the intestine with the help of a balloon to the required cross-section, which from the
- the object of the invention is to further improve the quality of imaging of the prostate with the aid of MRI methods.
- the goal is not only to make the coil area as large as possible, but to align a plane of symmetry of the coil usually in the plane of symmetry of the body.
- the invention proposes that the coil is applied outside the balloon.
- the entire rectal coil typically includes a quadrature or multichannel coil as a coil and is passed through the intestine to the appropriate position d. H. pushed into the area of the prostate.
- the manner of attaching the coil to the balloon is achieved by suitable structural design of the rectal coil.
- An advantageous possibility of concretization is the use of a flexible half-tube. At rest, it has a small cross-section and allows the rectal coil to be introduced into the rectum without the sphincter having to be stretched excessively.
- the coil can be positioned in the intestine and fixed in the intestine by a holding device or a balloon (with or without liquid).
- the coil itself is located on the outside or on the inside of the half-tube or preferably in the wall of the half-tube.
- the coil is directed slightly towards the prostate with the help of the balloon, so that no pressure can be exerted on the prostate and yet it rests very close to the intestinal wall in the direction of the prostate.
- the conventional coil known in the prior art unfolds inside the balloon, mainly in the middle.
- the balloon serves as a carrier of the conventional coil and rests on all sides of the intestine.
- the coil is outside the balloon. Since the coil is mounted on a flexible circuit board and bent up with the half-tube is, the receiving antenna size is always the same size, because at a given inflating volume of the balloon, the effective area of the coil is uniquely determined. In the bent state, the maximum parallelprojectible surface of the half-tube and thus the effective area of the coil is much larger than at rest. This circumstance enormously improves the image quality of magnetic resonance tomography.
- the flexible circuit board with the coil in the production of flexible designed as half-tube in this half-tube, inject or glue so that it is well protected in the wall of the half-tube and the tensile stress of the coil when bending the half-tube is minimal.
- the coil may be mounted on the inside of the half-tube, which simplifies the manufacture of the half-tube, or may be mounted on the outside of the half-tube, thereby allowing it to be positioned as close as possible to the prostate.
- the connecting wires of the coil are guided from the half tube through a shaft to the outside.
- the entire rectal coil is rolled around the longitudinal axis for insertion at rest, then pushed through the sphincter and in the intestine to the appropriate position.
- the coil is intended for one-time use, which on the one hand is more hygienic and on the other hand does not impose too high demands on the quality of the material and the structural design, since the bending of the coil usually takes place only once.
- Continuous use of the rectal coil with replacement of a single use balloon is one Another interesting embodiment, because if necessary not the balloon, but can be autoclaved the rest of the rectal coil.
- Another variant is to equip the rectal coil with a balloon with several chambers.
- the advantage here is that the coil can be targeted by different exposure of the chambers with air or gel or a liquid. Applying a liquid has the advantage over exposure to air or a gas that fewer artifacts occur.
- a multi-chamber system proves to be an advantage when the individual chambers extend parallel to each other and in the longitudinal direction, run side by side, so are spaced apart in azimuth.
- This embodiment allows, by a different pressure and individual loading of the individual chambers, a rotation of the coil in the inserted state by the azimuth. In the prior art, this requires rotating the entire device about the longitudinal axis of the shaft, which does not permit precise alignment and adjustment.
- the multi-chamber system allows the coil to be precisely aligned with the target object, here the prostate.
- a flexible printed circuit board For applying the coil, a flexible printed circuit board can be used.
- the invention offers the following advantages over the prior art: -
- the coil is brought closer to the prostate, which improves the resolution.
- the effective area of the coil becomes as large as possible.
- the spatial orientation of the coil is better controlled especially when using multiple balloons.
- further devices for z As a needle guide, mounted between the balloon and coil to allow a locally accurate biopsy as possible.
- Fig. 1 rectal coil at rest in an overall view
- Fig. 2 cross section of the rectal coil at rest
- Fig. 3 rectal coil in the bent state in an overall view
- Fig. 5 rectal coil at rest in an overall view
- Fig. 6 cross section of the rectal coil in the resting state
- Fig. 9 Spool from right to left in the resting state of the rectal coil, in the bent state of the rectal coil and in the production state of the coil
- FIG. 1 shows a rectal coil at rest in an overall view.
- a half-tube 1 is mounted on its inside longitudinally centrally on a shaft 2, with which the rectal coil can be performed and fixed patient-external.
- the term half-tube is not to be taken strictly literally, because at rest, the round cross-section of the half-tube 1 preferably comprises slightly more than a semicircle.
- a balloon 3 is connected to the half-tube 1 on its inside, thereby covering the shaft 2.
- the balloon 3 is divided into a plurality of balloon chambers 31, 32.
- the use of a plurality of balloon chambers 31, 32 offers the advantage over the use of only one balloon chamber existing balloon 3 has the advantage that can be better aligned by optionally unequal filling of the balloon chambers 31, 32, the rectal coil on the intestinal wall.
- Two balloon chambers 31, 32 are a good number, but it can also be more balloon chambers, for example, head, ie away from the stem of the shaft 2, and the foot side, where the shaft 2 leaves the half-tube 1, are used, which continues the positioning of the rectal coil can facilitate.
- the balloon chambers 31, 32 can be filled individually by hoses 33, 34.
- the above and other components of the rec- Valley coil can also be seen in Fig. 2, which shows a cross section of the rectal coil at rest from the doctor's point of view, ie in the direction of the rectum.
- the coil 41, 42 is preferably realized in advance in a flexible printed circuit board.
- the coil 41, 42 for example, by supplying the spray material from both sides of the flexible circuit board through a plurality of nozzles approximately centrally between the inside and outside of the half-tube 1 poured and fixed. Equally well, the flexible printed circuit board can be pressed in at the edge between two half-shells of the injection mold, the protruding edges of the flexible printed circuit board being cut off after injection molding.
- the flexible circuit board with the coil 41, 42 forms the outer wall
- the outer part of the half-tube 1 with already applied flexible circuit board forms the inner wall
- the coil 41, 42 may also be applied on the inside or on the outside of the half-tube 1. For application or assembly is in these cases, a bond.
- the connecting wires of the coils 41, 42 are guided in a cable 43 through the shaft 2 to the outside.
- the half-tube 1 is so flexible that it is bent open by filling the balloon 3 or the balloon chambers 31, 32 and in cross-section. can be extended.
- the balloon chambers 31, 32 are individually filled by the associated hoses 33, 34, with air or preferably with a non-imaging fluid.
- the state achieved thereby can be seen in FIGS. 3 and 4. These correspond to Fig. 1 and Fig. 2, only just in the bent state of the half-tube 1 and rectal coil instead of at rest.
- the cross sections of the balloon 3 and the balloon chambers 31, 32 are expanded in the bent state.
- the cross section of the half-tube 1 now preferably comprises about a quarter circle, but with a larger diameter than at rest.
- the outer walls of the balloon 3, which are not adjacent to the half-tube 1, are pushed away from the half-tube 1 in the bent-up state of the half-tube 1 and rectal coil and, in their contours, can also approximately produce a quadrant.
- the expanded cross section of the rectal coil fixes it in the intestine.
- the coils 41, 42, the shape of which follows the shape of the half-tube 1, are pressed close or directly to the intestinal wall and are thus so very close to the prostate.
- the balloon 3 is preferably filled only so much that the prostate is not yet compressed.
- the shaft 2 and other components of the rectal coil such as the half-tube 1, as a single component of the rectal coil.
- the stem 2 is that elongated and sufficiently rigid part of the rectal coil on which the rectal coil can be held and inserted through the rectum.
- FIG. 9 Figures 5, 6, 7, 8 show the rectal coil according to the invention as in Figures 1, 2, 3 and 4, but intransparent, without auxiliary lines for non-visible components.
- the coils 41, 42 are shown by way of example in FIG. 9, in such a way that they overlap. From right to left, the coils 41, 42 in the rest state of the rectal coil and at the same time production state of the half-tube 1, in the bent-up state of the rectal coil and thus the half-tube 1 and flat in the manufacturing state of the coil and the flexible circuit board to see.
- the balloon 3 can be used in a one-way procedure, ie for single use, or by an exchangeable protection in the reusable method.
- a puncture device In the plane of symmetry of the rectal coil and in the middle of the coils 41, 42 is a possible use 51 for a puncture device.
- a guide carriage 52 In the shaft 2 is centrally located an opening 54 for insertion of a guide carriage 52.
- the guide carriage 52 is inserted into the opening 54 and is connected to a fixed molded or a slightly flexible tube 53. This can be moved with the guide carriage 52. For better hygiene you can use a disposable product.
- the puncture device is inserted through the tube 53, which thus serves as a needle guide.
- the tube 53 may also be designed as a sufficiently strong hose.
- a marker 55 is attached to the guide carriage 52 and auxiliary lines 56 are attached to the shaft 2, so that a calculation of the position of the lesion to be biopsied is possible.
- the tube 53 With the help of the tube 53, the displacement of the puncture device in the head or foot direction can be adjusted.
- the tion of the puncture device to the right or left, based on the body of the patient, can be achieved by rotating the tube 53 in the guide carriage 52 or by a new orientation of the rectal coil, the latter for example by individually filling the balloon chambers 31, 32.
- the depth is given by the measurement of the distance between the lesion and marker 55.
- the rectal coil according to the invention can develop its advantages even better when combined with a wedge pillow.
- the use of the rectal coil and the wedge pad is shown in FIG.
- the patient 60 lies with his back on a base plate 61 which has thigh support pads 62 for the patient 60.
- the buttocks and the pelvis lie on a coil construction 63, which may consist of one or more individual coils, in the latter case, for example, may be a Siemens 6Ch Flex Coil.
- the coil construction may be placed in a shell at a first location 64.
- the wedge pillow is used for support and slightly increased tilt of the pelvis.
- the coil construction 63 is likewise aligned or can be easily aligned, so that the focus is always on the medium to be examined, generally the prostate, and the coil construction 63 always has the optimum distance.
- the biopsy may be transrectal through the intestine between or beside the bent-up Rectal coil done, but also transperineal through the skin at the perineum between the anus and scrotum by a device 66th
- the wedge pillow is advantageously designed as part of a trough-shaped buttock pad.
- the buttock cushion serves to elevate the buttocks to ensure better transperineal or transrectal access.
- the coil construction 63 which contains the conventional flex coils, may be part of the trough-shaped butt pad or a support lying thereon.
- the coil construction 63 can be aligned by the wedge pillow or the tub-shaped buttocks cushion or by an adjustment to the medium to be examined, usually the prostate.
- a mechanism such as with pneumatic or motorized adjustment, be provided above the abdomen of the patient 60 there is a belt-fixed construction 67 with at least one further single coil, which is also usually placed around the scrotum and penis of the patient 60.
- body parts other than the prostate can be examined optimally.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- High Energy & Nuclear Physics (AREA)
- Radiology & Medical Imaging (AREA)
- Gynecology & Obstetrics (AREA)
- Reproductive Health (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310109660 DE102013109660A1 (de) | 2013-09-04 | 2013-09-04 | Rektalspule für Magnet-Resonanz-Tomographie |
PCT/DE2014/100313 WO2015032386A1 (de) | 2013-09-04 | 2014-09-01 | Rektalspule für magnet-resonanz-tomographie |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3048969A1 true EP3048969A1 (de) | 2016-08-03 |
Family
ID=51903737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14799324.0A Withdrawn EP3048969A1 (de) | 2013-09-04 | 2014-09-01 | Rektalspule für magnet-resonanz-tomographie |
Country Status (4)
Country | Link |
---|---|
US (1) | US9936894B2 (de) |
EP (1) | EP3048969A1 (de) |
DE (2) | DE102013109660A1 (de) |
WO (1) | WO2015032386A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11039787B2 (en) | 2011-11-23 | 2021-06-22 | Scanmed, Llc | Garment MRI antenna array |
JP1623846S (de) | 2017-10-27 | 2019-02-04 | ||
USD911526S1 (en) | 2018-05-21 | 2021-02-23 | Scanmed, Llc | Pelvic MRI coil |
CN109549626B (zh) * | 2018-11-22 | 2021-09-03 | 邵秀芹 | 一种生殖外部检查仪 |
CN112244753B (zh) * | 2020-11-02 | 2021-04-30 | 康年医疗科技有限公司 | 一种腹腔镜镜头固定设备 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4557260A (en) * | 1983-07-22 | 1985-12-10 | Reyes Jr Pedro M | Pelvic support for medical procedures |
JPS62286451A (ja) | 1986-06-05 | 1987-12-12 | 三菱電機株式会社 | 磁気共鳴用受信プロ−ブ |
US5050607A (en) * | 1987-03-04 | 1991-09-24 | Huntington Medical Research Institutes | High resolution magnetic resonance imaging of body cavities |
US5307814A (en) * | 1991-09-17 | 1994-05-03 | Medrad, Inc. | Externally moveable intracavity probe for MRI imaging and spectroscopy |
NL9201724A (nl) * | 1991-10-07 | 1993-05-03 | Medrad Inc En The Trustees Of | Sonde voor mri-beeldvorming en spectroscopie, in het bijzonder in het cervicale gebied. |
US5365928A (en) | 1992-11-25 | 1994-11-22 | Medrad, Inc. | Endorectal probe with planar moveable MRI coil |
US6263229B1 (en) * | 1998-11-13 | 2001-07-17 | Johns Hopkins University School Of Medicine | Miniature magnetic resonance catheter coils and related methods |
US20020101241A1 (en) | 2001-01-30 | 2002-08-01 | Chui Kui Ming | Internal antenna for magnetic resonance imaging, and a 'C' magnet horizontal field magnetic resonance system |
US7912531B1 (en) * | 2003-12-17 | 2011-03-22 | Advanced Cardiovascular Systems, Inc. | Magnetic resonance imaging coils |
US8038598B2 (en) * | 2006-05-15 | 2011-10-18 | Baystate Health, Inc. | Balloon endoscope device |
CA2655647A1 (en) * | 2006-07-17 | 2008-01-24 | Euro-Celtique S.A. | Medication applicator device |
DE102007046169A1 (de) | 2007-09-26 | 2009-04-09 | Schleifring Und Apparatebau Gmbh | Endorektalspule für Kernspintomographen |
-
2013
- 2013-09-04 DE DE201310109660 patent/DE102013109660A1/de not_active Withdrawn
-
2014
- 2014-09-01 WO PCT/DE2014/100313 patent/WO2015032386A1/de active Application Filing
- 2014-09-01 EP EP14799324.0A patent/EP3048969A1/de not_active Withdrawn
- 2014-09-01 DE DE112014004044.4T patent/DE112014004044A5/de not_active Withdrawn
- 2014-09-01 US US14/652,677 patent/US9936894B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2015032386A1 (de) | 2015-03-12 |
DE102013109660A1 (de) | 2015-03-05 |
US20150323621A1 (en) | 2015-11-12 |
DE112014004044A5 (de) | 2016-07-21 |
US9936894B2 (en) | 2018-04-10 |
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