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WO2016058813A1 - Alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique - Google Patents

Alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique Download PDF

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Publication number
WO2016058813A1
WO2016058813A1 PCT/EP2015/072209 EP2015072209W WO2016058813A1 WO 2016058813 A1 WO2016058813 A1 WO 2016058813A1 EP 2015072209 W EP2015072209 W EP 2015072209W WO 2016058813 A1 WO2016058813 A1 WO 2016058813A1
Authority
WO
WIPO (PCT)
Prior art keywords
tabletop
patient
scanner
indication device
aligning
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.)
Ceased
Application number
PCT/EP2015/072209
Other languages
English (en)
Inventor
Erkki Tapani VAHALA
Matti WAHLSTRÖM
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips NV filed Critical Koninklijke Philips NV
Publication of WO2016058813A1 publication Critical patent/WO2016058813A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/055—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

Definitions

  • the invention pertains to a system for aligning a patient within an MR scanner, an MR scanner system with an MR scanner including an MR bore and a system for aligning a patient within the MR scanner, and a method for generating a visible indication signal for aligning a patient within an MR scanner.
  • An indication device for sending out a visible indication signal e.g. a laser sending out a laser beam
  • a visible indication signal e.g. a laser sending out a laser beam
  • a laser sending out a laser beam may be used to position a patient in such a way that a cross hair formed by the laser falls on a patient's tattoo.
  • the patient may be correctly positioned in the MR scanner for image acquisition before acquiring an image from the requested location.
  • a patient may be scanned in an MR scanner, and the acquired image may be used to deduce where to put a tattoo on the patient's skin.
  • the indication device is used to indicate where to place the tattoo on the patient's skin after acquiring the image in the MR scanner.
  • a patient alignment system for an MR system is known.
  • a patient transport system is provided in longitudinal alignment with the MR bore.
  • the transport system is capable of retrievably positioning the patient in the active region of the magnetic field and includes first and second assemblies for projecting first and second visible patterns on the skin of the patient.
  • the second pattern is movable vertically within a predetermined range relative to a fixed reference point.
  • WO 2012/080984 Al describes a radiation therapy planning and follow-up system which includes an MR scanner with a first bore which defines an MR imaging region and a functional scanner, e.g. a nuclear imaging scanner, or a CT scanner with a second bore which defines a nuclear or CT imaging region.
  • a radiation therapy type couch moves linearly through the MR imaging region along an MR longitudinal axis and the nuclear or CT imaging region along a nuclear or CT longitudinal axis which is aligned with the MR longitudinal axis.
  • a fusion processor combines an image representation generated from data collection in the MR imaging region and an image representation generated from data collection in the nuclear or CT imaging region into a composite image representation and a planning processor generates a radiation therapy treatment plan according to the composite image.
  • US 2011/0306863 describes a patient alignment system for diagnostic and therapeutic procedures where the embodiment is mounted or referenced to the patient positioning interface such as add-on positioning devices or directly with the diagnostic and/or therapeutic treatment table or couch.
  • the object is achieved by a system for aligning a patient within an MR scanner, the system comprising:
  • an indication device for sending out a visible indication signal onto at least a part of the patient's body supported on the tabletop, wherein
  • the tabletop and the indication device are configured in such a way that in a predetermined area of the tabletop the indication device may be attached to the tabletop in a predetermined position and orientation in a fixed manner.
  • the indication device is integrated into the MR system, i.e. attached to the tabletop for the MR system, in a predetermined position and orientation in a fixed manner.
  • the same coordinate system may be used without the need of extra calibration. This means that accuracy may be highly improved without great effort.
  • the invention is based on the fact that the relation between the tabletop and its fixed accessories does not change. Therefore, aligning and marking may be made in relation to the tabletop, and, thus, no separate calibration for the indication device and the MR system, respectively, is required.
  • the indication device may be attached to the tabletop without any other additional device.
  • the indication device is part of a frame which is configured for being attached to the tabletop.
  • the frame is part of an RF (radio frequency) coil holder.
  • RF radio frequency
  • the frame the indication device is part of may be attached to the tabletop in different ways.
  • the tabletop comprises fixing holes for mechanically attaching and fixing the frame onto the tabletop. This provides for easy attachment and detachment of the frame onto or from the tabletop, respectively, while assuring that an exact positioning of the frame relative to the tabletop may be ensured.
  • fixation can re-utilize existing tabletop indexing mechanisms, which are conventionally used for patient fixation.
  • the indication device may comprise different types of light sources.
  • the indication device comprises at least one laser.
  • the indication device actually comprises at least two lasers. These lasers are preferably adapted for sending out laser light in two different light planes, respectively.
  • the lasers are fixed relative to the frame.
  • the lasers are movable in at least two different directions back and forth. In this way, relative and absolute marking requirements can be met in an easy and reliable way.
  • the tabletop comprises markers for MR imaging. This means, that the tabletop is provided with such markers that can be discovered in an image required by the MR system.
  • the markers for MR imaging are provided in the predetermined area for attaching the indication device or are provided on a tabletop extension, preferably on an extendable arm.
  • a tabletop extension preferably on an extendable arm. The latter is especially preferred in such situations in which the tabletop itself can move outside the imaging volume of the MR system.
  • an MR scanner system with an MR scanner including an MR bore and a system for aligning a patient within the MR scanner as described above, wherein
  • the tabletop and the indication device are configured to be movable inside and outside the MR bore, respectively.
  • positioning electronics preferably comprising a position encoder, a laser interferometer or/and a machine vision system, are provided for deducing the tabletop position relative to the MR bore.
  • a method for generating a visible indication signal for aligning a patient within an MR scanner comprising the following steps:
  • Fig. 1 schematically shows an MR scanner system according to a preferred embodiment of the invention
  • Fig. 2 schematically shows the tabletop of the MR scanner system according to a preferred embodiment of the invention in a perspective view
  • Fig. 3 schematically shows the attachment of an RF coil holder onto the tabletop of the MR scanner system according to a preferred embodiment of the invention in a perspective view
  • Fig. 4 schematically shows the RF coil holder of the MR scanner system according to a preferred embodiment of the invention with three fixed lasers for relative marking in a perspective view
  • Fig. 5 schematically shows the RF coil holder of the MR scanner system according to a preferred embodiment of the invention with three automatically movable lasers for absolute marking in a perspective view, and
  • Fig. 6 schematically shows the RF coil holder of the MR scanner system according to a preferred embodiment of the invention with three manually movable lasers for absolute marking in a perspective view.
  • Fig. 1 schematically shows an MR scanner system according to a preferred embodiment of the invention, with a tabletop 1 on which a patient 2 is supported and an MR scanner 3 with an MR bore 4 for acquiring an image based on the MRI (magnetic resonance imaging) technique.
  • the tabletop 1 is movably supported by a tabletop support 5 which allows the tabletop 1 to be moved inside and outside the MR bore 4 as indicated by the arrow.
  • Positioning electronics 15 in the form of a machine vision system is provided for deducing the position of the tabletop 1 relative to the MR bore 4.
  • an RF coil 6 is provided which is mounted on an RF coil holder 7.
  • the RF coil holder 7 itself is attached to a tabletop 1 by pins 8 which are arranged at the feet 9 of the RF coil holder 7. These pins 8 are introduced in fixing holes 10 which are provided in the tabletop 1 as shown in Figs. 2 and 3.
  • the tabletop 1 is provided with markers 11 for MR imaging, i.e. markers which may be identified on an image acquired with the MR system. This serves for deducing the position of the tabletop relative to relative to the MR bore 4.
  • the usable area for marking and imaging is indicated as a grey area 12 on the tabletop 1 which makes it easier to position the patient 2 on the tabletop 1 in a correct way for marking and/or imaging.
  • FIGs. 1 and 3 only show the RF coil holder 7 without explicitly providing details with respect to any indication device for marking
  • Figs. 4, 5 and 6 show the use of three lasers as indication devices according to different embodiments of the invention.
  • Fig. 4 shows the use of three lasers which send out laser light in three different light planes, respectively. These lasers 12 are provided in different bars of the RF coil holder 7. In this way, within the volume covered by the RF coil holder 7, the lasers 12 may be used for indicating any marking spot within this volume. According to the embodiment shown in Fig. 4, the lasers 12 are fixed and, thus, the RF coil holder 7 according to this embodiment of the invention may be used for relative marking, i.e. the laser beams sent out by the laser 12 may be used to position the patient 2 in such a way that a cross hair formed by the laser beams falls on a tattoo on the skin of the patient 2. In this way, the patient 2 may be correctly positioned in the MR scanner 3 for image acquisition before acquiring an image from the respective location.
  • the embodiments of the invention shown in Figs. 5 and 6 may be used for absolute marking, where the patient 2 is scanned in the MR scanner 3, and the acquired image is be used to deduce where to put a tattoo on skin of the patient 2.
  • laser 13, 14 are used to indicate where to place the tattoo on the skin of the patient 2 after acquiring the image in the MR scanner 3.
  • the lasers 13 of the embodiment shown in Fig. 5 are movable along different directions along the respective bars of the RF coil holder 7.
  • an automatic movement of the lasers 13 is provided for, i.e. by small electric motors not shown in detail.
  • the embodiment shown in Fig. 5 an automatic movement of the lasers 13 is provided for, i.e. by small electric motors not shown in detail.
  • a manual movement of the lasers 14 is provided. Compatibility with the MR system may require powering off the lasers 12, 13, 14 and/or motors during imaging - even with MR compatible piezo motors.
  • the mechanical version for manual movement of the lasers 14, a low-cost system comprises rulers next to the lasers 14 and an in-room display for manually adjusting and locking thumb-controls for the lasers 14 in place.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

L'invention concerne l'alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique. À cette fin, un système est prévu pour aligner un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique (3), comprenant un plateau de table (1) sur lequel peut être placé un patient (2), et un dispositif d'indication pour émettre un signal d'indication visible sur au moins une partie du corps du patient disposé sur le plateau (1). Le plateau de table (1) et le dispositif d'indication sont conçus de telle sorte que, dans une zone prédéterminée du plateau (1), le dispositif d'indication puisse être fixé au plateau (1) sur une position et une orientation prédéterminées, d'une manière fixe. De préférence, le dispositif d'indication est une partie du support de bobine de radiofréquence (7), qui peut être fixé au plateau (1). De cette manière, une possibilité fiable d'alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique (3) est fournie, qui peut être réalisée d'une manière simple et économique.
PCT/EP2015/072209 2014-10-16 2015-09-28 Alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique Ceased WO2016058813A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14189148.1 2014-10-16
EP14189148 2014-10-16

Publications (1)

Publication Number Publication Date
WO2016058813A1 true WO2016058813A1 (fr) 2016-04-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/072209 Ceased WO2016058813A1 (fr) 2014-10-16 2015-09-28 Alignement d'un patient à l'intérieur d'un appareil d'imagerie par résonance magnétique

Country Status (1)

Country Link
WO (1) WO2016058813A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3536378A1 (fr) * 2018-03-08 2019-09-11 Koninklijke Philips N.V. Dispositif conçu pour être aligné par rapport à un système médical

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149510A (en) 1983-11-10 1985-06-12 Gen Electric Patient alignment system for nmr studies
US20110306863A1 (en) 2010-06-15 2011-12-15 Jason Koshnitsky Patient alignment system for diagnostic and therapeutic procedures
WO2012080984A2 (fr) 2010-12-17 2012-06-21 Laboratorios Senosiain S.A. De C.V. Comprimé pharmaceutique à libération contrôlée pour administration par voie orale
US20130342350A1 (en) * 2012-06-26 2013-12-26 Stefan Popescu Method and medical imaging device for communication between a control unit and a patient and/or an operator
US20140184218A1 (en) * 2012-12-28 2014-07-03 General Electric Company Systems and methods for landmarking for subject imaging
EP2774537A1 (fr) * 2013-03-08 2014-09-10 Imris Inc. Alignement de patient dans une radiothérapie guidée par IRM

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149510A (en) 1983-11-10 1985-06-12 Gen Electric Patient alignment system for nmr studies
US20110306863A1 (en) 2010-06-15 2011-12-15 Jason Koshnitsky Patient alignment system for diagnostic and therapeutic procedures
WO2012080984A2 (fr) 2010-12-17 2012-06-21 Laboratorios Senosiain S.A. De C.V. Comprimé pharmaceutique à libération contrôlée pour administration par voie orale
US20130342350A1 (en) * 2012-06-26 2013-12-26 Stefan Popescu Method and medical imaging device for communication between a control unit and a patient and/or an operator
US20140184218A1 (en) * 2012-12-28 2014-07-03 General Electric Company Systems and methods for landmarking for subject imaging
EP2774537A1 (fr) * 2013-03-08 2014-09-10 Imris Inc. Alignement de patient dans une radiothérapie guidée par IRM

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3536378A1 (fr) * 2018-03-08 2019-09-11 Koninklijke Philips N.V. Dispositif conçu pour être aligné par rapport à un système médical
WO2019170786A1 (fr) * 2018-03-08 2019-09-12 Koninklijke Philips N.V. Dispositif configuré pour être aligné par rapport à un système médical

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