WO2011009448A1 - Device for accommodating at least one flexible coil element for use in an imaging method by means of a magnetic resonance imager (mri) - Google Patents

Device for accommodating at least one flexible coil element for use in an imaging method by means of a magnetic resonance imager (mri) Download PDF

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Publication number
WO2011009448A1
WO2011009448A1 PCT/DE2010/000865 DE2010000865W WO2011009448A1 WO 2011009448 A1 WO2011009448 A1 WO 2011009448A1 DE 2010000865 W DE2010000865 W DE 2010000865W WO 2011009448 A1 WO2011009448 A1 WO 2011009448A1
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WIPO (PCT)
Prior art keywords
housing
coil element
flexible coil
patient
flexible
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PCT/DE2010/000865
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German (de)
French (fr)
Inventor
Martin Hempel
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Martin Hempel
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Publication of WO2011009448A1 publication Critical patent/WO2011009448A1/en

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Classifications

    • 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
    • G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
    • 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
    • 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

Definitions

  • MRT magnetic resonance tomograph
  • the invention relates to a device for receiving at least one flexible coil element for use in an imaging method by means of a magnetic resonance tomograph (MRI).
  • MRI magnetic resonance tomograph
  • so-called surface coils are used which, in use, completely or partially surround the region of the patient to be examined.
  • flexible coil elements are used, which are attached for example by means of Velcro straps or straps on the patient, or fixed coil elements, which are arranged in a solid housing, usually poured, and a frame-like arrangement in a defined distance and defined position relative to the patient can be arranged.
  • Imaging MRI procedures are increasingly used in the field of surgical medicine, for example, to document the course of an operation, for example a brain operation, or to check the final result before the patient is transferred from the operating room.
  • Such interventional recordings are further necessary in surgical procedures in which the surgeon operates via a so-called navigation or assistance software. It may be necessary to obtain a new data set for navigation at regular or irregular intervals, in particular if, for example, the tissue to be operated shifts during the procedure.
  • flexible coil elements are not suitable because on the one hand a fixation in the OP-FeId on the patient is not possible and on the other a repeatable removal and attaching the Spulenele- ment, at least within the required accuracy, practically can not be done.
  • the known flexible coil elements which usually have flexible printed circuit boards, which are embedded in a plastic foam, only very conditionally to clean and in particular not to sterilize usually. This excludes in particular the use in the OR, as explained above, almost.
  • fixed coil elements can meet the requirements for repeatable positioning, but are due to the rigid housing regularly suitable only for a particular application. This increases the necessary number of kept in a clinic fixed coil elements and thus the costs considerably. The same applies if the fixed coil elements have to be cleaned, sterilized and disinfected before or after surgery, and therefore fail for the surgeon for the duration of this cleaning. In order to avoid an uneconomic standstill of the MRI system, therefore, the fixed coil elements are usually redundant, that is at least twice to provide.
  • the object of the present invention to provide a device with a coil element for use in an imaging method by means of a magnetic resonance tomograph (MRT), the high hygiene requirements is suitable for use in an operating room and is suitable for use cases that require in particular interventional recordings.
  • MRT magnetic resonance tomograph
  • MRT magnetic resonance tomograph
  • this makes it possible to use a comparatively inexpensive flexible coil element, in particular of a standard coil element, as is regularly available in clinics or practices which have an MRT, and on the other hand, the housing can be used before or after use, For example, a surgical procedure in a patient, easily separate from the coil element and clean or disinfect or sterilize.
  • the coil element itself is available for further use immediately after the intervention, be it with another housing or in a conventional manner. Due to the patient-closed wall of the housing, the coil element itself does not have to be sterile, since it does not come into contact with the patient and consequently can not be contaminated.
  • a further advantage of the design according to the invention is that, for different applications requiring different coil geometries, it is no longer necessary to stock and use a large number of complete fixed coil devices. Rather, it is quite sufficient, vorzuhalten and use only in the form of different housing, while the coil element itself can remain the same. This reduces the costs considerably. Expensive special coils, as in the prior art, can be largely avoided.
  • the design of the housing is initially basically arbitrary and depends essentially on the particular application. It should only be noted that the permissible bending radii and, when using several coil elements in a housing, the permissible distances or overlaps are not exceeded or complied with.
  • the housing consists of a dimensionally stable plastic. This can be achieved in a simple manner that the housing itself is dimensionally stable and thus arranged in the housing flexible coil can be arranged in a repeatable defined position relative to the patient, as it is particularly necessary if during a surgical procedure, the coil assembly repeatedly removed and again must be set up.
  • the type of introduction of the flexible coil element in the housing is basically arbitrary.
  • the housing laterally have an insertion opening into which the coil element can be inserted.
  • the housing has at least one opening for insertion and removal of the flexible coil element on a side facing away from the patient when used as intended. This can be done in be achieved in a simple manner that the coil element can be inserted from above into the housing.
  • the housing is preferably substantially trough-shaped, with the edges of the trough overlapping the opening at least in regions.
  • means for fixing the flexible coil element are provided according to a further embodiment in or on the housing.
  • These may be, for example, straps, Velcro, push button or dovetail arrangements or the like.
  • means for closing the opening are provided on the housing. These may for example have a removable lid or a closable flap or else be formed by a sterile cover, for example in the form of a cloth or a foil, which can be brought over the opening.
  • the housing is initially not made of a dimensionally stable plastic. Rather, the housing has a flexible mat with at least two chambers, wherein in the first chamber, the flexible coil element is arranged and the second chamber has a plurality of bulk solids, in particular plastic balls. At least the second chamber is so vacuumable that the mat as a whole obtains a dimensionally stable shape.
  • the housing can be designed to be reusable and sterilizable. However, it is also possible with this design to provide the housing for a single use only and to dispose of it accordingly after use.
  • the first containing the flexible coil element chamber is arranged on the patient side of the mat when used as intended, wherein at least the patient facing side of this chamber is formed by a substantially closed wall.
  • means are provided on the housing for the positionally accurate fastening of the device to a table, in particular operating table, or a transport system.
  • this attachment can be made directly or via an arranged on the table or transport system frame assembly.
  • the material of the housing is initially arbitrary, as long as it is ensured that this is sufficiently magnetically permeable.
  • the housing consists of an easy to clean, to be disinfected and / or sterilized plastic or ceramic material.
  • Fig. 1 in a schematic perspective view of a first embodiment of a housing of he inventive device like devices; 2 shows the embodiment of Figure 1 with inserted flexible coil element. and
  • FIG. 3 is a perspective sectional view of a second embodiment of a device according to the invention with inserted flexible coil lenelement.
  • FIG. 1 of a housing 1 of a device according to the invention has a substantially integrally molded body made of a dimensionally stable or dimensionally stable plastic and thus represents a dimensionally stable or dimensionally stable housing.
  • the housing 1 is curved in a single shell and is intended for Recording a flexible coil element in the form of a two-part interventional head coil determines (Fig. 2).
  • the housing 1 is overall trough-shaped with a bottom 2, a closed circumferential edge 3 and an opening 4, which is opposite to the bottom 2, formed.
  • the edge 3 is in the range of the two
  • a flexible coil element 7 in the form of a two-part head coil can be introduced into the housing 1 via the opening 4.
  • Velcro strap 8 which is threaded through two tabs on the opposite end edges 6, the coil element 7 can be fixed in the housing 1.
  • the embodiment of FIG. 3 has a fundamentally different structure.
  • the housing 9 of this embodiment consists of an initially flexible plastic material and forms a total of a mat with two chambers 10 and 11.
  • the flexible coil element 12 is arranged in the first chamber 10.
  • the chamber 10 is arranged on the mat or the housing 9 on the side facing the patient, and is closed to the patient via a closed wall 13.
  • the second chamber 1 1 is filled with bulk solids in the form of plastic balls 14.
  • the chamber 11 is vacuumed or evacuated.
  • the bulk solids reach each other non-positively to the plant and thereby form with the chamber wall a dimensionally stable or dimensionally stable housing.
  • fastening means 15 are provided on the housing 9 in the region of the wall 13, with which the coil element 12 is held in the chamber 10 or with which prevents the wall 13 is released from the coil and in undefined position above the patient or against the patient.

Abstract

The invention relates to a device for accommodating at least one flexible coil element for use in an imaging method by means of a magnetic resonance imager (MRI), comprising a housing (1), in which the flexible coil element (7, 12) can be inserted and from which the flexible coil element can be removed. The housing is closed on the side of the housing that faces a patient in such a way that, when used as intended, direct contact of the patient with the flexible coil element is prevented.

Description

Vorrichtung zur Aufnahme mindestens eines flexiblen Spulenelementes zur Verwendung in einem bildgebenden Verfahren mittels eines Magnetresonanztomographen (MRT)  Device for receiving at least one flexible coil element for use in an imaging method by means of a magnetic resonance tomograph (MRT)
Die Erfindung betrifft eine Vorrichtung zur Aufnahme mindestens eines flexiblen Spulenelementes zur Verwendung in einem bildgebenden Verfahren mittels eines Magnetresonanztomographen (MRT). The invention relates to a device for receiving at least one flexible coil element for use in an imaging method by means of a magnetic resonance tomograph (MRI).
Um in einem MRT ein Bild eines Patienten zu erzeugen, finden soge- nannte Oberflächenspulen Verwendung, die im Gebrauch die zu untersuchende Region des Patienten ganz oder teilweise umschließen. Dabei werden entweder flexible Spulenelemente verwendet, die beispielsweise mittels Klettbändern oder Gurten am Patienten befestigt werden, oder aber feste Spulenelemente, die in einem festen Gehäuse angeordnet, in der Regel eingegossen, sind und über eine rahmenartige Anordnung in definiertem Abstand und definierter Position relativ zum Patienten angeordnet werden können. In order to generate an image of a patient in an MRI, so-called surface coils are used which, in use, completely or partially surround the region of the patient to be examined. In this case, either flexible coil elements are used, which are attached for example by means of Velcro straps or straps on the patient, or fixed coil elements, which are arranged in a solid housing, usually poured, and a frame-like arrangement in a defined distance and defined position relative to the patient can be arranged.
Bildgebende MRT Verfahren werden zunehmend im Bereich der operativen Medizin verwendet, um beispielsweise den Verlauf einer Operation, beispielsweise einer Hirnoperation, zu dokumentieren oder das Endergebnis vor dem Verbringen des Patienten aus dem OP zu überprüfen. Derartige interventionelle Aufnahmen sind weiter bei Operationsverfahren notwendig, bei denen der Chirurg über eine sogenannte Navigationsoder Assistenzsoftware operiert. Dabei kann in regelmäßigen oder unregelmäßigen Abständen die Gewinnung eines neuen Datensatzes zur Navigation notwendig sein, insbesondere wenn sich beispielsweise während des Eingriffs das zu operierende Gewebe verschiebt. Für diesen Zweck sind flexible Spulenelemente nicht geeignet, da zum Einen eine Fixierung im OP-FeId am Patienten überhaupt nicht möglich ist und zum Anderen ein wiederholgenaues Abnehmen und Anbringen des Spulenele- mentes, zumindest im Rahmen der erforderlichen Genauigkeit, praktisch nicht erfolgen kann. Zudem sind die bekannten flexiblen Spulenelemente, die üblicherweise flexible Leiterplatten aufweisen, die in einem Kunststoff schäum eingebettet sind, nur sehr bedingt zu reinigen und insbesondere in der Regel nicht zu sterilisieren. Dies schließt insbeson- dere die Verwendung im OP, wie vorstehend erläutert, nahezu aus. Imaging MRI procedures are increasingly used in the field of surgical medicine, for example, to document the course of an operation, for example a brain operation, or to check the final result before the patient is transferred from the operating room. Such interventional recordings are further necessary in surgical procedures in which the surgeon operates via a so-called navigation or assistance software. It may be necessary to obtain a new data set for navigation at regular or irregular intervals, in particular if, for example, the tissue to be operated shifts during the procedure. For this purpose, flexible coil elements are not suitable because on the one hand a fixation in the OP-FeId on the patient is not possible and on the other a repeatable removal and attaching the Spulenele- ment, at least within the required accuracy, practically can not be done. In addition, the known flexible coil elements, which usually have flexible printed circuit boards, which are embedded in a plastic foam, only very conditionally to clean and in particular not to sterilize usually. This excludes in particular the use in the OR, as explained above, almost.
Feste Spulenelemente können zwar die Anforderungen an die wiederholgenaue Positionierbarkeit erfüllen, sind aber aufgrund des starren Gehäuses regelmäßig nur für einen bestimmten Anwendungsfall geeignet. Dies erhöht die notwendige Anzahl der in einer Klinik vorzuhaltenden festen Spulenelemente und damit die Kosten ganz erheblich. Gleiches gilt, wenn die festen Spulenelemente nach bzw. vor einer OP gereinigt, sterilisiert und desinfiziert werden müssen und daher für die Dauer dieser Reinigung für den Chirurgen ausfallen. Um einen unwirtschaftlichen Stillstand der MRT-Anlage zu vermeiden, sind daher in der Regel die festen Spulenelemente redundant, das heißt mindestens doppelt, vorzusehen. Although fixed coil elements can meet the requirements for repeatable positioning, but are due to the rigid housing regularly suitable only for a particular application. This increases the necessary number of kept in a clinic fixed coil elements and thus the costs considerably. The same applies if the fixed coil elements have to be cleaned, sterilized and disinfected before or after surgery, and therefore fail for the surgeon for the duration of this cleaning. In order to avoid an uneconomic standstill of the MRI system, therefore, the fixed coil elements are usually redundant, that is at least twice to provide.
Ausgehend von diesem Stand der Technik ist es daher die Aufgabe der vorliegenden Erfindung, eine Vorrichtung mit einem Spulenelement zur Verwendung in einem bildgebenden Verfahren mittels eines Magnetreso- nanztomographen (MRT) zu liefern, die die hohen Hygieneanforderungen zur Verwendung in einem OP erfüllt und für Anwendungsfälle geeignet ist, die insbesondere interventionelle Aufnahmen erfordern. Starting from this prior art, it is therefore the object of the present invention to provide a device with a coil element for use in an imaging method by means of a magnetic resonance tomograph (MRT), the high hygiene requirements is suitable for use in an operating room and is suitable for use cases that require in particular interventional recordings.
Diese Aufgabe wird durch eine Vorrichtung nach der Lehre des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche. This object is achieved by a device according to the teaching of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.
Gemäß der Erfindung weist die Vorrichtung zur Aufnahme mindestens eines flexiblen Spulenelementes zur Verwendung in einem bildgebenden Verfahren mittels eines Magnetresonanztomographen (MRT) ein Gehäuse auf, in das das flexible Spulenelement einlegbar und aus diesem entnehmbar ist, wobei das Gehäuse zumindest auf seiner beim bestimmungsgemäßen Gebrauch zu einem Patienten weisenden Seite derart geschlossen ist, dass der unmittelbare Kontakt des Patienten mit dem flexiblen Spulenelement verhindert wird. Es ist also mit anderen Worten eine wesentliche Idee der vorliegenden Erfindung, das Merkmal des Gehäuses funktionell zu trennen vom eigentlichen Spulenelement. Dies ermöglicht zum Einen die Verwendung eines vergleichsweise günstig zu beschaffenden flexiblen Spulenelementes, insbesondere eines Standardspulenelementes, wie es in den Kliniken oder Praxen, die über ein MRT verfügen, ohnehin regelmäßig vorhanden ist, und zum Anderen lässt sich das Gehäuse vor oder nach einer Benutzung, beispielsweise einem operativen Eingriff bei einem Patienten, in einfacher Weise vom Spulenelement trennen und reinigen bzw. desinfizieren oder sterilisieren. Das Spulenelement selbst steht hingegen unmit- telbar nach dem Eingriff wieder zur weiteren Verwendung zur Verfügung, sei es mit einem anderen Gehäuse oder in herkömmlicher Weise. Aufgrund der zum Patienten geschlossenen Wand des Gehäuses muss das Spulenelement selbst nicht steril sein, da dieses nicht mit dem Patienten in Berührung kommt und demzufolge auch nicht kontaminiert werden kann. Ein weiterer Vorteil der erfindungsgemäßen Gestaltung ist, dass für verschiedene Anwendungsfälle, die unterschiedliche Spulengeometrien erfordern, nicht mehr eine Vielzahl von kompletten festen Spulenvorrichtungen vorgehalten und verwendet werden muss. Vielmehr genügt es durchaus, lediglich in der Form unterschiedliche Gehäuse vorzuhalten und zu verwenden, während das Spulenelement selbst das gleiche bleiben kann. Dies verringert die Kosten ganz erheblich. Teure Spezialspulen, wie nach dem Stand der Technik, können so weitgehend vermieden werden. Die Gestaltung der Gehäuse ist zunächst grundsätzlich beliebig und hängt im Wesentlichen vom jeweiligen Anwendungsfall ab. Es ist dabei lediglich zu beachten, dass die zulässigen Biegeradien sowie, bei der Verwendung mehrerer Spulenelemente in einem Gehäuse, die zulässigen Abstände oder Überlappungen nicht überschritten bzw. eingehalten werden. According to the invention, the device for receiving at least one flexible coil element for use in an imaging method by means of a magnetic resonance tomograph (MRT) on a housing into which the flexible coil element can be inserted and removed from this, the housing at least on its intended use a patient facing side is closed so that the direct contact of the patient with the flexible coil element is prevented. In other words, it is an essential idea of the present invention to functionally separate the feature of the housing from the actual coil element. On the one hand, this makes it possible to use a comparatively inexpensive flexible coil element, in particular of a standard coil element, as is regularly available in clinics or practices which have an MRT, and on the other hand, the housing can be used before or after use, For example, a surgical procedure in a patient, easily separate from the coil element and clean or disinfect or sterilize. The coil element itself, on the other hand, is available for further use immediately after the intervention, be it with another housing or in a conventional manner. Due to the patient-closed wall of the housing, the coil element itself does not have to be sterile, since it does not come into contact with the patient and consequently can not be contaminated. A further advantage of the design according to the invention is that, for different applications requiring different coil geometries, it is no longer necessary to stock and use a large number of complete fixed coil devices. Rather, it is quite sufficient, vorzuhalten and use only in the form of different housing, while the coil element itself can remain the same. This reduces the costs considerably. Expensive special coils, as in the prior art, can be largely avoided. The design of the housing is initially basically arbitrary and depends essentially on the particular application. It should only be noted that the permissible bending radii and, when using several coil elements in a housing, the permissible distances or overlaps are not exceeded or complied with.
Nach einer besonders bevorzugten Ausgestaltung der Erfindung besteht das Gehäuse aus einem formstabilen Kunststoff. Dadurch kann in einfacher Weise erreicht werden, dass das Gehäuse selbst formstabil ist und damit die im Gehäuse angeordnete flexible Spule in wiederholgenauer definierter Lage relativ zum Patienten angeordnet werden kann, wie es insbesondere erforderlich ist, wenn während eines operativen Eingriffs die Spulenanordnung mehrfach entfernt und wieder aufgesetzt werden muss. According to a particularly preferred embodiment of the invention, the housing consists of a dimensionally stable plastic. This can be achieved in a simple manner that the housing itself is dimensionally stable and thus arranged in the housing flexible coil can be arranged in a repeatable defined position relative to the patient, as it is particularly necessary if during a surgical procedure, the coil assembly repeatedly removed and again must be set up.
Die Art der Einbringung des flexiblen Spulenelementes in das Gehäuse ist grundsätzlich beliebig. So kann beispielsweise das Gehäuse seitlich eine Einschuböffnung aufweisen, in die das Spulenelement einschiebbar ist. Nach einem bevorzugten Ausführungsbeispiel der Erfindung jedoch weist das Gehäuse auf einer bei bestimmungsgemäßen Gebrauch vom Patienten wegweisenden Seite mindestens eine Öffnung zum Einlegen und Entfernen des flexiblen Spulenelementes auf. Dadurch kann in einfacher Weise erreicht werden, dass das Spulenelement von oben in das Gehäuse einlegbar ist. The type of introduction of the flexible coil element in the housing is basically arbitrary. Thus, for example, the housing laterally have an insertion opening into which the coil element can be inserted. According to a preferred embodiment of the invention, however, the housing has at least one opening for insertion and removal of the flexible coil element on a side facing away from the patient when used as intended. This can be done in be achieved in a simple manner that the coil element can be inserted from above into the housing.
Vorzugsweise ist dabei das Gehäuse im Wesentlichen wannenartig geformt, wobei die Ränder der Wanne die Öffnung zumindest bereichs- weise übergreifen. Durch diese Gestaltung kann erreicht werden, dass das ins Gehäuse eingebrachte Spulenelement diese Ränder hintergreift und somit im Gehäuse gegen ein Herausfallen gesichert gehalten wird. In this case, the housing is preferably substantially trough-shaped, with the edges of the trough overlapping the opening at least in regions. By this design can be achieved that the introduced into the housing coil element engages behind these edges and is thus secured in the housing against falling out.
Um eine weitere Fixierung des Spulenelementes im Gehäuse zu erreichen, sind nach einem weiteren Ausführungsbeispiel im oder am Gehäuse Mittel zur Befestigung des flexiblen Spulenelementes vorgesehen. Dies können beispielsweise Spanngurte, Klettbänder, Druckknopf- oder Schwalbenschwanzanordnungen oder dergleichen mehr sein. In order to achieve a further fixation of the coil element in the housing, means for fixing the flexible coil element are provided according to a further embodiment in or on the housing. These may be, for example, straps, Velcro, push button or dovetail arrangements or the like.
Insbesondere wenn die Öffnung des Gehäuses, durch die das Spulenelement eingelegt oder entnommen werden kann, der dem Patienten zuge- wandten Seite gegenüberliegt, kann im Regelfall die Öffnung offen bleiben, da eine Verschmutzung des Spulenelementes praktisch auszuschließen ist. Falls jedoch erhöhte Anforderungen hinsichtlich Sauberkeit und Sterilität bestehen, sind nach einem weiteren Ausführungsbeispiel der Erfindung am Gehäuse Mittel zum Verschließen der Öffnung vorgesehen. Diese können beispielsweise einen abnehmbaren Deckel oder eine schließbare Klappe aufweisen oder aber durch eine sterile Abdeckung, beispielsweise in Form eines Tuches oder einer Folie, gebildet werden, die über die Öffnung bringbar ist. In particular, when the opening of the housing, through which the coil element can be inserted or removed, the opposite side facing the patient, as a rule, the opening can remain open because contamination of the coil element is virtually impossible. However, if there are increased requirements in terms of cleanliness and sterility, according to a further embodiment of the invention means for closing the opening are provided on the housing. These may for example have a removable lid or a closable flap or else be formed by a sterile cover, for example in the form of a cloth or a foil, which can be brought over the opening.
Nach einer weiteren besonders bevorzugten Ausführungsform der Erfin- düng besteht das Gehäuse zunächst nicht aus einem formstabilen Kunststoff. Vielmehr weist das Gehäuse eine flexible Matte mit mindestens zwei Kammern auf, wobei in der ersten Kammer das flexible Spulenelement angeordnet ist und die zweite Kammer eine Vielzahl von Schüttkörpern, insbesondere Kunststoffkugeln, aufweist. Dabei ist zumindest die zweite Kammer derart vakuumierbar, dass die Matte insgesamt eine formstabile Form erhält. Dadurch lässt sich in einfacher Weise nahezu jede beliebige Gehäuseform realisieren. Das Gehäuse kann dabei wiederverwendbar und sterilisierbar ausgebildet sein. Es ist bei dieser Gestaltung jedoch auch möglich, das Gehäuse lediglich zur einmaligen Ver- Wendung vorzusehen und nach Gebrauch entsprechend zu entsorgen. According to another particularly preferred embodiment of the invention, the housing is initially not made of a dimensionally stable plastic. Rather, the housing has a flexible mat with at least two chambers, wherein in the first chamber, the flexible coil element is arranged and the second chamber has a plurality of bulk solids, in particular plastic balls. At least the second chamber is so vacuumable that the mat as a whole obtains a dimensionally stable shape. As a result, almost any housing shape can be realized in a simple manner. The housing can be designed to be reusable and sterilizable. However, it is also possible with this design to provide the housing for a single use only and to dispose of it accordingly after use.
Um einen hohen Wirkungsgrad des Spulenelementes zu erzielen, ist die erste das flexible Spulenelement enthaltende Kammer bei bestimmungsgemäßen Gebrauch patientenseitig an der Matte angeordnet, wobei zumindest die zum Patienten weisende Seite dieser Kammer durch eine im wesentlichen geschlossene Wand gebildet wird. Bei dieser Gestaltung ist es auszuschließen, dass die Schüttkörper der zweiten Kammer eine die Bildgebung negativ beeinflussende Abschirmung des Spulenelementes bewirken. In order to achieve a high efficiency of the coil element, the first containing the flexible coil element chamber is arranged on the patient side of the mat when used as intended, wherein at least the patient facing side of this chamber is formed by a substantially closed wall. With this design, it can be ruled out that the bulk bodies of the second chamber bring about a shielding of the coil element which negatively influences the imaging.
Nach einem weiteren besonders bevorzugten Ausführungsbeispiel der Erfindung sind am Gehäuse Mittel zur insbesondere lagegenauen Befestigung der Vorrichtung an einem Tisch, insbesondere OP-Tisch, oder einem Transportsystem vorgesehen. Dabei kann diese Befestigung unmittelbar oder über eine am Tisch bzw. Transportsystem angeordnete Rahmenanordnung erfolgen. Gemäß dieser Gestaltung kann sichergestellt werden, dass der Patient bei lagegenau aufgesetzter Vorrichtung in den MRT verbracht und nach Aufnahme wieder an den OP-Ort geschoben werden kann, ohne dass sich eine die Genauigkeit verschlechternde Verschiebung der Spule relativ zum Patienten ergibt. According to a further particularly preferred embodiment of the invention, means are provided on the housing for the positionally accurate fastening of the device to a table, in particular operating table, or a transport system. In this case, this attachment can be made directly or via an arranged on the table or transport system frame assembly. According to this design, it can be ensured that the patient can be placed in the MRI when the device is positioned in the correct position and can be pushed back to the surgical site after being taken, without resulting in an accuracy-degrading displacement of the coil relative to the patient.
Das Material des Gehäuses ist zunächst beliebig, solange sichergestellt ist, dass dieses ausreichend magnetisch durchlässig ist. Vorzugsweise jedoch besteht das Gehäuse aus einem leicht zu reinigenden, zu desinfizierenden und/oder zu sterilisierenden Kunststoff- oder Keramikmaterial. The material of the housing is initially arbitrary, as long as it is ensured that this is sufficiently magnetically permeable. Preferably, however, the housing consists of an easy to clean, to be disinfected and / or sterilized plastic or ceramic material.
Im Folgenden wird die Erfindung anhand lediglich Ausführungsbeispiele darstellender Zeichnungen näher erläutert. Es zeigt: In the following the invention will be explained in more detail with reference to exemplary embodiments illustrative drawings. It shows:
Fig. 1 in schematischer perspektivischer Darstellung ein erstes Ausführungsbeispiel eines Gehäuses einer er findungs gern äßen Vorrichtung; Fig. 2 das Ausführungsbeispiel nach Fig. 1 mit eingelegtem flexiblen Spulenelement; und Fig. 1 in a schematic perspective view of a first embodiment of a housing of he inventive device like devices; 2 shows the embodiment of Figure 1 with inserted flexible coil element. and
Fig. 3 in perspektivischer geschnittener Darstellung ein zweites Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung mit eingelegtem flexiblen Spu- lenelement. 3 is a perspective sectional view of a second embodiment of a device according to the invention with inserted flexible coil lenelement.
Das in der Fig. 1 dargestellte Ausführungsbeispiel eines Gehäuses 1 einer erfindungsgemäßen Vorrichtung weist einen im Wesentlichen einstückig geformten Körper aus einem formstabilen oder formsteifen Kunststoff auf und stellt somit insgesamt ein formstabiles oder formstei- fes Gehäuse dar. Das Gehäuse 1 ist einschalig gekrümmt und ist zur Aufnahme eines flexiblen Spulenelementes in Form einer zweiteiligen interventionellen Kopfspule bestimmt (Fig. 2). The embodiment shown in FIG. 1 of a housing 1 of a device according to the invention has a substantially integrally molded body made of a dimensionally stable or dimensionally stable plastic and thus represents a dimensionally stable or dimensionally stable housing. The housing 1 is curved in a single shell and is intended for Recording a flexible coil element in the form of a two-part interventional head coil determines (Fig. 2).
Das Gehäuse 1 ist insgesamt wannenförmig mit einem Boden 2, einem geschlossen umlaufenden Rand 3 und einer Öffnung 4, die dem Boden 2 gegenüberliegt, ausgebildet. Der Rand 3 ist im Bereich der beidenThe housing 1 is overall trough-shaped with a bottom 2, a closed circumferential edge 3 and an opening 4, which is opposite to the bottom 2, formed. The edge 3 is in the range of the two
Stirnseiten und der vier Eckbereiche derart ausgebildet, dass der Rand bzw. die Ränder 6 in diesem Bereich die Öffnung 4 bereichsweise überdecken bzw. verschließen. An den beiden Stirnseiten ist jeweils eine Befestigungslasche 5 vorgesehen, mit der das Gehäuse 1 und damit die gesamte Vorrichtung lagegenau, das heißt in definierter Stellung, an einem nicht dargestellten OP-Tisch lösbar befestigbar ist. Der Boden 2 ist geschlossen ausgebildet und weist bei bestimmungsgemäßem End sides and the four corner regions formed such that the edge or the edges 6 in this area, the area 4 cover area or close. At the two end faces in each case a fastening tab 5 is provided, with which the housing 1 and thus the entire device position, that is in a defined position, on a non-illustrated operating table is detachably fastened. The bottom 2 is formed closed and has at its intended
Gebrauch in Richtung des Patienten. Wie insbesondere aus der Fig. 2 ersichtlich ist, kann über die Öffnung 4 ein flexibles Spulenelement 7 in Form einer zweiteiligen Kopfspule in das Gehäuse 1 eingebracht werden. Mittels eines als Klettband ausgebildeten Spanngurtes 8, der durch zwei Laschen an den gegenüberliegenden stirnseitigen Rändern 6 gefädelt ist, kann das Spulenelement 7 im Gehäuse 1 fixiert werden. Use in the direction of the patient. As can be seen in particular from FIG. 2, a flexible coil element 7 in the form of a two-part head coil can be introduced into the housing 1 via the opening 4. By means of a trained as Velcro strap 8, which is threaded through two tabs on the opposite end edges 6, the coil element 7 can be fixed in the housing 1.
Das Ausführungsbeispiel nach Fig. 3 weist einen grundsätzlich anderen Aufbau auf. Das Gehäuse 9 dieses Ausführungsbeispiels besteht aus einem zunächst flexiblen Kunststoffmaterial und bildet insgesamt eine Matte mit zwei Kammern 10 und 11. In der ersten Kammer 10 ist das flexible Spulenelement 12 angeordnet. Die Kammer 10 ist dabei an der Matte bzw. dem Gehäuse 9 an der Seite angeordnet, die zum Patienten weist, und ist gegenüber dem Patienten über eine geschlossene Wand 13 abgeschlossen. Die zweite Kammer 1 1 ist mit Schüttkörpern in Form von Kunststoffkugeln 14 gefüllt. Nachdem die Matte die gewünschte Form erhalten hat, wird die Kammer 11 vakuumiert bzw. evakuiert. Dabei gelangen die Schüttkörper aneinander kraftschlüssig zur Anlage und bilden dadurch mit der Kammerwand ein formsteifes bzw. formstabiles Gehäuse. Wie lediglich schematisch angedeutet ist, sind am Gehäuse 9 im Bereich der Wand 13 Befestigungsmittel 15 vorgesehen, mit denen das Spulenelement 12 in der Kammer 10 gehalten wird bzw. mit denen verhindert wird, dass die Wand 13 sich von der Spule löst und in Undefinierter Position über dem Patienten hängt oder am Patienten anliegt. The embodiment of FIG. 3 has a fundamentally different structure. The housing 9 of this embodiment consists of an initially flexible plastic material and forms a total of a mat with two chambers 10 and 11. In the first chamber 10, the flexible coil element 12 is arranged. The chamber 10 is arranged on the mat or the housing 9 on the side facing the patient, and is closed to the patient via a closed wall 13. The second chamber 1 1 is filled with bulk solids in the form of plastic balls 14. After the mat has received the desired shape, the chamber 11 is vacuumed or evacuated. The bulk solids reach each other non-positively to the plant and thereby form with the chamber wall a dimensionally stable or dimensionally stable housing. As is indicated only schematically, fastening means 15 are provided on the housing 9 in the region of the wall 13, with which the coil element 12 is held in the chamber 10 or with which prevents the wall 13 is released from the coil and in undefined position above the patient or against the patient.

Claims

Patentansprüche claims
1. Vorrichtung zur Aufnahme mindestens eines flexiblen Spulenelemen- tes zur Verwendung in einem bildgebenden Verfahren mittels eines1. A device for receiving at least one flexible Spulenelemen- tes for use in an imaging method by means of a
Magnetresonanztomographen (MRT) mit einem Gehäuse, in das das flexible Spulenelement einlegbar und aus diesem entnehmbar ist, wobei das Gehäuse zumindest auf seiner beim bestimmungsgemäßen Gebrauch zu einem Patienten weisenden Seite derart geschlossen ist, dass der unmittelbare Kontakt des Patienten mit dem flexiblen Spulenelement verhindert wird. Magnetic Resonance Imaging (MRI) with a housing into which the flexible coil element can be inserted and removed, the housing being closed at least on its intended use to a patient side such that direct contact of the patient with the flexible coil element is prevented ,
2. Vorrichtung nach Anspruch 1, 2. Apparatus according to claim 1,
dadurch gekennzeichnet,  characterized,
dass das Gehäuse aus einem formstabilen Kunststoff besteht.  that the housing consists of a dimensionally stable plastic.
3. Vorrichtung nach Anspruch 1 oder 2, 3. Apparatus according to claim 1 or 2,
dadurch gekennzeichnet,  characterized,
dass das Gehäuse auf einer bei bestimmungsgemäßen Gebrauch vom Patienten wegweisenden Seite mindestens eine Öffnung zum Einlegen und Entfernen des flexiblen Spulenelementes aufweist.  the housing has at least one opening for insertion and removal of the flexible coil element on a side facing away from the patient when used as intended.
4. Vorrichtung nach einem der Ansprüche 1 bis 3, 4. Device according to one of claims 1 to 3,
dadurch gekennzeichnet,  characterized,
dass das Gehäuse im Wesentlichen wannenartig geformt ist, wobei die Ränder der Wanne die Öffnung zumindest bereichsweise übergreifen. that the housing is formed substantially like a trough, wherein the edges of the trough overlap the opening at least partially.
5. Vorrichtung nach einem der Ansprüche 1 bis 4, 5. Device according to one of claims 1 to 4,
dadurch g ekennzei chn et,  characterized,
dass am Gehäuse Mittel zur Befestigung des flexiblen Spulenelementes vorgesehen sind.  in that means are provided on the housing for fastening the flexible coil element.
6. Vorrichtung nach Anspruch 3, 6. Apparatus according to claim 3,
dadurch gek ennz ei chnet,  characterized,
dass am Gehäuse Mittel zum Verschließen der Öffnung vorgesehen sind.  in that means are provided on the housing for closing the opening.
7. Vorrichtung nach Anspruch 1, 7. Apparatus according to claim 1,
dadurch gekennzei chn et,  characterized,
dass das Gehäuse eine flexible Matte mit mindesten zwei Kammern aufweist, wobei in der ersten Kammer das flexible Spulenelement angeordnet ist und die zweite Kammer eine Vielzahl von Schüttkörpern, insbesondere Kunststoffkugeln, aufweist, wobei zumindest die zweite Kammer derart vakuumierbar ist, dass die Matte insgesamt eine formstabile Form erhält.  in that the housing has a flexible mat with at least two chambers, wherein in the first chamber the flexible coil element is arranged and the second chamber has a plurality of bulk bodies, in particular plastic balls, wherein at least the second chamber is vacuumable such that the mat as a whole obtains a dimensionally stable shape.
8. Vorrichtung nach Anspruch 7, 8. Apparatus according to claim 7,
dadurch gekennz ei chnet,  characterized,
dass die erste das flexible Spulenelement enthaltende Kammer bei bestimmungsgemäßen Gebrauch patientenseitig an der Matte angeordnet ist, wobei zumindest die zum Patienten weisende Seite dieser Kammer durch eine im wesentlichen geschlossene Wand gebildet wird.  that the first containing the flexible coil element chamber is arranged on the patient side of the mat when used as intended, wherein at least the patient facing side of this chamber is formed by a substantially closed wall.
9. Vorrichtung nach einem der Ansprüche 1 bis 8, 9. Device according to one of claims 1 to 8,
dadurch gekennz ei chnet,  characterized,
dass am Gehäuse Mittel zur insbesondere lagegenauen Befestigung der Vorrichtung an einem Tisch, insbesondere OP-Tisch, oder einem Transportsystem vorgesehen sind. in that means are provided on the housing for, in particular, positionally accurate fastening of the device to a table, in particular an operating table, or a transport system.
10. Vorrichtung nach einem der Ansprüche 1 bis 9, 10. Device according to one of claims 1 to 9,
dadurch gekennzeichnet,  characterized,
dass das Gehäuse aus einem leicht zu reinigenden, zu desinfizierenden und/oder zu sterilisierenden Kunststoff- oder Keramikmaterial besteht.  that the housing consists of an easy to clean, to be disinfected and / or sterilized plastic or ceramic material.
PCT/DE2010/000865 2009-07-23 2010-07-23 Device for accommodating at least one flexible coil element for use in an imaging method by means of a magnetic resonance imager (mri) WO2011009448A1 (en)

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DE200910034312 DE102009034312A1 (en) 2009-07-23 2009-07-23 Protective housing for flexible MR coils
DE102009034312.1 2009-07-23

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