WO2015044058A1 - Récupération d'orientation de patient à partir d'images précédentes - Google Patents

Récupération d'orientation de patient à partir d'images précédentes Download PDF

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Publication number
WO2015044058A1
WO2015044058A1 PCT/EP2014/070069 EP2014070069W WO2015044058A1 WO 2015044058 A1 WO2015044058 A1 WO 2015044058A1 EP 2014070069 W EP2014070069 W EP 2014070069W WO 2015044058 A1 WO2015044058 A1 WO 2015044058A1
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WIPO (PCT)
Prior art keywords
image data
spatial position
patient
ray
acquisition device
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PCT/EP2014/070069
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English (en)
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Fred Simon Berend VAN NIJNATTEN
Daniel Simon Anna Ruijters
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Koninklijke Philips N.V.
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Publication of WO2015044058A1 publication Critical patent/WO2015044058A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/08—Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/04—Positioning of patients; Tiltable beds or the like
    • A61B6/0492—Positioning of patients; Tiltable beds or the like using markers or indicia for aiding patient positioning
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
    • A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/20—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for computer-aided diagnosis, e.g. based on medical expert systems

Definitions

  • the present invention relates to re-positioning a patient, and relates in particular to a medical X-ray imaging system, to a method for re-positioning of a patient in relation to an X-ray image acquisition device, as well as to a computer program element and to a computer readable medium.
  • WO 2011/042832 Al describes a patient table comprising a positioning system. For automatically positioning the patient table, position data of movable joints with sensor arrangements is acquired, and, upon further moving of the table, a difference between the position data can be determined. However, this requires additional data processing and storage.
  • a medical X-ray imaging system comprises an X-ray image acquisition device, a patient support device, an interface device, a processing device, and a positioning device.
  • the interface device is configured to provide previously acquired first image data of a patient in a first spatial position in relation to the X-ray image acquisition device.
  • the X-ray image acquisition device is configured to acquire current second image data with the X-ray image acquisition device of the patient in a second spatial position in relation to the X-ray image acquisition device.
  • One of the first or second image data is a 3D volume data of the patient, and the other one of the second or first image data is 2D image data of the patient.
  • the processing device is configured to register the first image data and the second image data, and to determine a relative movement between the first and the second spatial position.
  • the X-ray image acquisition device and the patient support device are movable in relation to each other.
  • the positioning device is configured to adjust a relative position between the X-ray image acquisition device and the patient support device.
  • the positioning device is further configured to re-position the patient in relation to the X-ray image acquisition device in a repositioned spatial position based on the determined relative movement for movement compensation to achieve a predetermined matching degree with the first spatial position.
  • the X-ray image acquisition device is configured to acquire further image data of the patient in the re-positioned spatial position.
  • the re-positioning is based on the image data, and no further data processing, such as determining positioning data of positioning measurement arrangements, is necessary. Rather, the positioning, i.e. the re-positioning, is achieved by using image data, in particular image data that is available due to being acquired previously.
  • the interface provides the image data, for example stored in data storage.
  • the X-ray image acquisition device is a movable C- arm system.
  • a method for re-positioning of a patient in relation to an X-ray image acquisition device comprises the following steps:
  • one of the first or second image data is a 3D volume data of the patient, and the other one of the second or first image data is 2D or 3D image data of the patient;
  • the patient motion is assumed to be rigid.
  • spatial position relates to an arrangement of the patient in relation to the imaging apparatus, i.e. the image acquisition device, in respect of translational and rotational movement possibilities.
  • the “spatial position” refers to the arrangement of the patient in the X-ray beam.
  • predetermined matching degree relates to a matching of the repositioned spatial position and the first spatial position with a deviation of maximum +/- 15 %, e.g. +/- 10 % or +/- 5 %.
  • an exact matching is achieved, i. e. a matching with a deviation of approximately 0 %, i.e. +/- 2 % or even of exactly 0 %.
  • step f the further images are acquired in the same spatial position as the first image data.
  • the spatial positions are provided in relation to a global frame of reference that connects a frame of reference of the patient support with a frame of reference of the image acquisition device.
  • the re-positioning is based exclusively on image registration.
  • the repositioning is based on the capability of the X-ray system to precisely position the system to programmed angles. This can be achieved by an X-ray system that is fixedly installed in an examination room.
  • a movable X-ray system could also be used that is temporarily locked in its position in the room to allow precise adjustment of the imaging system. Adjustability between patient support and X-ray imaging system is required to re-position the patient to the desired position.
  • the re-positioning of the patient in relation to the X-ray image acquisition device can be provided by actually re-positioning the patient in relation to the X-ray image acquisition device or by re-positioning the X-ray image acquisition device in relation to the patient in a re-positioned spatial position. Re-positioning can also be provided by repositioning both the patient and the X-ray image acquisition device.
  • the "relative spatial position” can be provided as a particular spatial positioning of the patient or a particular spatial positioning of the X-ray image acquisition device, or both.
  • the "first image data" in the “first spatial position” can also be referred to as “original image data” in the "original spatial position”.
  • the "current second image data" in the "second spatial position” can also be referred to as “current image data”, i.e. actual image data, in the "current spatial position”, i.e. actual spatial position.
  • the "further image data" in the re-positioned spatial position can also be referred to as “re-positioned image data” or “follow-up image data” in the re-positioned spatial position.
  • step a "original image data” is provided in step a), and "re- positioning image data” is acquired in step b), and “follow-up image data” is acquired in step f) after re-positioning to match with the spatial position of the original image data.
  • the first image data is a 2D X-ray image sequence.
  • the second image data is a rotational scan of X-ray images, and a 3D volume is reconstructed to capture the current orientation and position of the patient.
  • the 3D volume is registered with the 2D image sequence, and in step d), the orientation and position of the current spatial patient position relative to the first spatial position is determined for determining the movement factor.
  • a compensation movement factor is calculated to obtain the first spatial position of the patient and the X-ray image acquisition device relative to each other.
  • step i) determining a first relative movement factor portion between the second and the third spatial position, and, based on step c), determining a second relative movement factor portion between the first and the third spatial position, and determining a further relative movement factor based on the first and the second movement factor portion; and j) re-positioning the patient in relation to the X-ray image acquisition device based on the determined further relative movement factor for further movement
  • the "current third image data" in the "third spatial position” can also be referred to as “current (i.e. actual) image data” in the "current (i.e. actual) spatial position”
  • the "current second image data” in the "second spatial position” (of step b)) would then be referred to as "intermediate image data" in the
  • the "further image data" in the "re-positioned spatial position” can also be referred to as “further re-positioned image data” or “further follow-up image data” in the "further re-positioned spatial position”.
  • step b) is "first follow-up image data”
  • step k) is "second follow-up image data”.
  • the first follow-up image data is nevertheless used for re-positioning for further, second follow-up image data.
  • step a "original image data” is provided in step a), and “first repositioning image data” is acquired in step b), and “first follow-up image data” is acquired in step f), and “second re-positioning image data” is acquired in step g), the first re-positioning image data acting as intermediate image data, and "second follow-up image data” is acquired in step k) after re-positioning to match with the spatial position of the original image data.
  • the re-positioning may also be provided in a repeated manner in case no further follow-up images are acquired after re-positioning, but in cases where the patient moves after re-positioning.
  • the patient and the X-ray imaging system are re-positioned in the same position and orientation in relation to each other compared to a previously acquired image sequence.
  • patient movement that may be rather large
  • which itself would make it difficult to obtain images in the same position and orientation, and thus would make the comparison of images difficult and inaccurate, can be compensated so that a new X-ray image, or a new X-ray image sequence can be obtained from the same position and orientation as a previously acquired image sequence, in relation to the patient.
  • a rotational scan can be acquired, from which a 3D volume is reconstructed.
  • the 3D volume captures the current orientation and position of the patient.
  • This volume is registered using 2D-3D registration with a previously acquired 2D image sequence.
  • the registration yields the position and orientation of the previously acquired image sequence relative to the current position and orientation of the patient.
  • the relative position and orientation encodes how much the system should be moved to obtain the position and orientation of the previously acquired image sequence.
  • the patient motion at least the relevant region of interest, is assumed to be rigid in this context.
  • the re-positioning of patient and X-ray image acquisition in relation to each other is provided in an image based manner. An existing difference between an actual position and a previously position is detected by registering the respective image data and by determining a relative movement factor that is then used for the re-positioning.
  • Fig. 1 shows a schematic setup of an example of a medical X-ray imaging system
  • Fig. 2 shows basic steps of an example of a method for re-positioning a patient in relation to an X-ray image acquisition device
  • Fig. 3 shows a further example of a method for re-positioning
  • Fig. 4 shows a still further example of a method for re-positioning.
  • Fig. 1 shows a medical X-ray imaging system 100 comprising an X-ray image acquisition device 102 and a patient support device 104, for example a patient table. Further, an interface device 106, a processing device 108, and a positioning device 110 is provided.
  • the X-ray image acquisition device may be provided as a C-arm structure 112 with a detector 114 and an X-ray source 116 arranged on opposing ends of a C-arm 118.
  • the C-arm can be movably mounted by a support structure 120, for example allowing a first rotational movement 122 around a first rotation axis, and a second rotational movement 124 around a second rotational axis.
  • a so-called rolling movement 126 may be provided, and in addition, as an option, a further rotational movement 128 of the detector 114 may be provided.
  • the support structure 120 can be movably mounted to a second support structure, thus forming a support arrangement (not shown), for example allowing translational movement in a first horizontal direction, and in a second horizontal direction. Also movement in a vertical direction may be provided by the support arrangement.
  • X-ray image acquisition device types can be used, for example systems with robot arms supporting detector and X-ray source, respectively.
  • a fixed X-ray image acquisition device can be provided, i.e. a system with non-movable X-ray source and X-ray detector, but a movable patient support.
  • a limited movable system can be provided, for example allowing only limited movement.
  • the patient support device 104 may be provided as a patient table with an adaptable support stand 130 allowing translational movement in a first horizontal direction 132, a second horizontal direction 134, and a vertical direction 136.
  • the adaptable stand 130 could allow a first rotational movement around a first rotational axis, and a second rotational movement around a second rotational axis, and a third rotational movement around a third rotational axis.
  • movements are also referred to as pivot, tilt and cradle movements.
  • the patient support is a support structure for a patient to lean against in a standing position.
  • the patient support is a support structure for body parts of the patient, e.g. an arm, leg or head support, or a breast support for mammography.
  • the positioning device 110 is indicated with simplified frames only, since the respective movement components for allowing the positioning are not further shown in detail.
  • the interface device 106 is configured to provide previously acquired first image data 138 of a patient in a first spatial position in relation to the X-ray image acquisition device.
  • the X-ray image acquisition device 102 is configured to acquire current second image data, indicated with an arrow 140 with the X-ray image acquisition device 102, wherein the patient is in a second spatial position in relation to the X-ray image acquisition device 102.
  • One of the first or second image data 138, 140 is a 3D volume data of the patient, and the other one of the second or first image data 140, 138 is 2D image data of the patient.
  • the processing device 108 is configured to register the first image data and the second image data 138, 140, and to determine a relative movement between the first and the second spatial position.
  • the positioning device 110 is configured to adjust a relative position between the X-ray image acquisition device and the patient support device, and to re-position the patient in relation to the X-ray image acquisition device in a re-positioned spatial position based on the determined relative movement for movement compensation to achieve a predetermined matching degree with the first spatial position.
  • the X-ray image acquisition device 102 is further configured to acquire further image data of the patient in the re-positioned spatial position.
  • the X-ray image acquisition device 102 is further configured to acquire current third image data with the X-ray image acquisition device 102 of the patient in a third spatial position in relation to the X-ray image acquisition device.
  • the processing device 108 is configured to register the second image data and the third image data, and to determine a first relative movement factor portion between the second and the third spatial position, and to determine a second relative movement factor portion between the first and the third spatial position, and to determine a further relative movement factor based on the first and the second movement factor portion.
  • the positioning device 110 is configured to re-position the patient in relation to the X-ray image acquisition device based on the determined further relative movement factor for further movement compensation to achieve a predetermined matching degree of the re-positioned spatial position with the first spatial position for acquisition of further image data.
  • the X-ray image acquisition device 102 is configured to acquire further image data of the patient in the repositioned spatial position.
  • Fig. 2 shows a method 10 for re-positioning of a patient in relation to an X-ray image acquisition device.
  • the method 10 comprises the following steps:
  • previously acquired first image data 14 is provided of a patient in a first spatial position in relation to an X-ray image acquisition device.
  • current second image data 18 is acquired with the X-ray image acquisition device of the patient in a second spatial position in relation to the X-ray image acquisition device.
  • One of the first or second image data is a 3D volume data of the patient, and the other one of the second or first image data is 2D or 3D image data of the patient.
  • a third step 20 the first image data 14 and the second image data 18 are registered.
  • a relative movement factor 24 between the first and the second spatial position is determined.
  • a fifth step 26 the patient and the X-ray image acquisition device are repositioned in relation to each other in a re-positioned relative spatial position based on the determined relative movement factor 24 for movement compensation to achieve a
  • the first step 12 may also be referred to as step a), the second step 16 as step b), the third step 20 as step c), the fourth step 22 as step d), and the fifth step 26 as step e).
  • a sixth step 28 is provided, in which further image data 30 of the patient in the re-positioned spatial position is acquired.
  • a dotted connection line 32 indicates this as an option.
  • step f The further shown sixth step 28 may also be referred to as step f).
  • the spatial position relates to an arrangement of the patient in relation to the imaging apparatus in respect of translational and rotational movement possibilities referring to an arrangement of the patient in the X-ray beam.
  • the first image data are primary X-ray images that are acquired in the first spatial position at a first point in time.
  • the second image data are secondary X-ray images that are acquired in the second spatial position at a second point in time. Further X-ray images are acquired in the re-positioned spatial position at a further point in time.
  • the primary X-ray images are the first image data.
  • the first image data is a 2D X-ray image sequence.
  • the second image data is a rotational scan of X-ray images, and a 3D volume is reconstructed to capture the current orientation and position of the patient.
  • the 3D volume is registered with the 2D image sequence.
  • the orientation and position of the current spatial patient position relative to the first spatial position is determined for determining the movement factor.
  • a compensation movement factor is calculated to obtain the first spatial position of the patient and the X-ray image acquisition device relative to each other.
  • the first image data is a 2D X-ray image.
  • the second image data is a 3D rotational reconstruction based on a plurality of second 2D X-ray images taken from different angles.
  • the first image data is a 3D X- ray image
  • the second image data is a 2D X-ray image, or a plurality of 2D X- ray images taken from different angles forming at least a part of a 3D X-ray image.
  • the 3D X-ray image may be a 3D image generated from a plurality of 2D X- ray image slices.
  • step e) the re-positioning is achieved by either moving a patient support, or by moving the X-ray image acquisition device.
  • both moving the patient support and moving the X-ray image acquisition device are provided in a combined manner.
  • the patient support is a motorized patient table.
  • the X-ray image acquisition device is, as mentioned above, a movable C-arm structure.
  • movement instructions are provided for user-activated relative movement in a further example.
  • Fig. 3 shows a further example where the following further steps are provided:
  • a further acquisition step 34 is provided, in which current third image data 36 is acquired with the X- ray image acquisition device of the patient in a third spatial position in relation to the X-ray image acquisition device.
  • a further registration step 38 is provided, in which the second image data, indicated with a first arrow 40, is registered with the third image data 36.
  • a first relative movement factor portion 44 between the second and the third spatial position is provided.
  • a further determination step 46 is provided, in which a second relative movement factor portion 48 between the first spatial position, indicated with a second arrow 50, and the third spatial position is determined.
  • a still further determination step 50 is provided, in which a further relative movement factor 52 is determined based on the first and the second movement factor portions 44, 48.
  • a further re-positioning step 54 in which the patient is re-positioned in relation to the X-ray image acquisition device based on the determined further relative movement factor 52 for further movement compensation to achieve a predetermined matching degree of the re-positioned spatial position with the first spatial position for acquisition of further image data.
  • the further acquisition step 34 is also referred to as step g), the further registration step 38 as step h), the further determination step 42, the still further determination step 46 and the still further determination step 50 as step i), and the re-positioning step 54 as step j).
  • a further acquisition step 56 in which further image data 58 of the patient in the re-positioned spatial position is acquired.
  • the further acquisition step 56 is also referred to as step k).
  • step g) is referred to as step b 2 ), step h) as step c 2 ), step i) as step d 2 ), step j) as step e 2 ), and step k) as step f 2 ).
  • Fig. 4 shows a further example of a method, in which in step a), a 2D X-ray sequence 60 is provided of a patient in a first previous spatial position. Between step a) and step b), it is further provided the following steps: In a further provision step 62, also referred to as step ai), previously acquired second image data 64 of the patient in a second previous spatial position is provided, wherein the previously acquired second image data is previously acquired 3D volume. In step c), it is provided the following two-step registration: in a first registration step 66, also referred to as step Ci), the previously acquired first image data and the previously acquired second image data are registered.
  • a first registration step 66 also referred to as step Ci
  • step d) it is provided a two-step determination with a first determination step 70, also referred to as step di), in which a first relative movement factor 72 between the first previous spatial position and the second previous spatial position is determined.
  • step 74 also referred to as step d 2
  • step d 2 a second relative movement factor 76 between the second previous spatial position and the second spatial position is determined.
  • step 78 a continued relative movement factor 80 based on the first and second relative movement factor is determined.
  • the third determination step 78 is also referred to as step d 3 ).
  • step e) the re-positioning in step e) is provided based on the continued relative movement factor 80.
  • the first image data is a 3D rotational reconstruction based on a plurality of first 2D X-ray images taken from different angles.
  • the second image data is a 2D X-ray image, and in step c), the 2D X-ray image is registered with the 3D rotational reconstruction.
  • step d) the orientation and position of the current spatial position relative to the first spatial position is determined, and before step e), a compensation movement is calculated to obtain the first spatial position of the patient and the X-ray image acquisition device relative to each other.
  • the first image data is a 3D dataset, e.g. a CT dataset.
  • the first image data is an MRI dataset.
  • a 2D-3D registration is used.
  • the six parameters are provided: three
  • the relative position (translational components) requires three parameters storing the relative height, relative lateral and relative longitudinal position.
  • the relative orientation (rotational components) can be stored as Euler angles representing three composed rotations around the z-, y-, and x-axes, for example the vertical axis 136, the first horizontal axis 132 and the second horizontal axis 134.
  • the new orientation can be obtained by a motorized X-ray system with a rotating C- arm structure, for example by rotation an upper L-arm 142, or by propeller and role movement, i.e. the first rotational movement 122 and the rolling movement 126.
  • the center of rotation of the registration matches with the center of rotation of the system, in one example.
  • two rotations are required to obtain any position of the detector 114, whereas the third determines the rotation of the detector in the image plane, for example provided as the extra rotation 128.
  • the image can also be rotated by opposed processing operation.
  • the user could choose a fixed L-arm position, and move only the propeller and role, and finally rotate the image by post processing.
  • the detector could be rotated.
  • the new position is obtained by either moving a motorized table to the new position, or alternatively to move the C-arm to the new position. Further, a combination of both is provided.
  • the distance between the source and the detector determines the amount of magnification. Since patient movement has no influence on this parameter, there is no need in an example to solve this parameter using 2D-3D registration.
  • subsequent movement is provided.
  • the volume captures the current position and orientation of the patient.
  • it is provided in an example to avoid obtaining a new volume every time the patient moves.
  • it is proposed to acquire a single X-ray image and to register this image with the volume acquired before.
  • the new image encodes the new current position and orientation of the patient.
  • By registering the new image with the volume it is possible to achieve relative movement since the time the volume was acquired.
  • the relative movement between the new image and the volume is obtained. The two registrations are then combined to yield the relative position and orientation of the previously acquired image with the current image, i.e. the new image.
  • the computed relative orientation between the old and the new image may not match with the system center of rotation.
  • the second registration it is possible to compute the relative position between the volume and the new image, and hence the translation of the center of rotation. Knowing this translation of the center of rotation and the relative orientation, the system angles and translations, e.g. by table movement, are calculated.
  • 3D dataset can be used, e.g. a preoperative CT or MRI dataset.
  • a computer program or a computer program element is provided that is characterized by being adapted to execute the method steps of the method according to one of the preceding embodiments, on an appropriate system.
  • the computer program element might therefore be stored on a computer unit, which might also be part of an embodiment of the present invention.
  • This computing unit may be adapted to perform or induce a performing of the steps of the method described above. Moreover, it may be adapted to operate the components of the above described apparatus.
  • the computing unit can be adapted to operate automatically and/or to execute the orders of a user.
  • a computer program may be loaded into a working memory of a data processor.
  • the data processor may thus be equipped to carry out the method of the invention.
  • This exemplary embodiment of the invention covers both, a computer program that right from the beginning uses the invention and a computer program that by means of an up-date turns an existing program into a program that uses the invention.
  • the computer program element might be able to provide all necessary steps to fulfill the procedure of an exemplary embodiment of the method as described above.
  • a computer readable medium such as a CD-ROM
  • the computer readable medium has a computer program element stored on it, which computer program element is described by the preceding section.
  • a computer program may be stored and/or distributed on a suitable medium, such as an optical storage medium or a solid state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the internet or other wired or wireless telecommunication systems.
  • the computer program may also be presented over a network like the World Wide Web and can be downloaded into the working memory of a data processor from such a network.
  • a medium for making a computer program element available for downloading is provided, which computer program element is arranged to perform a method according to one of the previously described embodiments of the invention.

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Abstract

La présente invention concerne le repositionnement en imagerie médicale. Afin de faciliter le repositionnement d'un patient par rapport à un système d'imagerie à rayons X, on propose de fournir (12) des premières données d'image précédemment acquises (14) d'un patient dans une première position spatiale par rapport à un dispositif d'acquisition d'image radiologique. Des secondes données d'image actuelles (18) sont acquises (16) avec le dispositif d'acquisition d'image radiologique du patient dans une seconde position spatiale par rapport au dispositif d'acquisition d'image radiologique. Les premières ou secondes données d'image sont des données de volume 3D du patient, et les autres des secondes ou premières données d'image sont des données d'image 2D ou 3D du patient. En outre, les premières données d'image et les secondes données d'image sont enregistrées (20). Ensuite, un facteur de déplacement relatif (24) entre les première et seconde positions spatiales est déterminé (22). Ensuite, le patient et le dispositif d'acquisition d'image radiologique sont repositionnés (26) l'un par rapport à l'autre dans une position spatiale relative repositionnée sur la base du facteur de déplacement relatif déterminé en vue d'une compensation de déplacement pour obtenir un degré de correspondance prédéterminé de la position spatiale repositionnée avec la première position spatiale en vue de l'acquisition d'autres données d'image.
PCT/EP2014/070069 2013-09-26 2014-09-22 Récupération d'orientation de patient à partir d'images précédentes WO2015044058A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13186129 2013-09-26
EP13186129.6 2013-09-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2533798A (en) * 2014-12-30 2016-07-06 Gen Electric Method and system for tracking a person in a medical room

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008002374A2 (fr) * 2006-06-28 2008-01-03 Accuray Incorporated géométrie de stéréovision parallèle en radiochirurgie guidée par image

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008002374A2 (fr) * 2006-06-28 2008-01-03 Accuray Incorporated géométrie de stéréovision parallèle en radiochirurgie guidée par image

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2533798A (en) * 2014-12-30 2016-07-06 Gen Electric Method and system for tracking a person in a medical room
GB2533798B (en) * 2014-12-30 2018-02-28 Gen Electric Method and system for tracking a person in a medical room
US10244968B2 (en) 2014-12-30 2019-04-02 General Electric Company Method and system for tracking a person in a medical room

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