Coordinate transformation of graphical objects registered to a magnetic resonance image

{
  "publication_number": "US2015051517A1",
  "country": "US",
  "kind": "A1",
  "title": "Coordinate transformation of graphical objects registered to a magnetic resonance image",
  "abstract": "A method of using a medical instrument (300, 400) comprising a magnetic resonance imaging (MRI) system (302). The MRI system acquires (100, 202) first magnetic resonance data (342) and reconstructs (102, 204) a first magnetic resonance image (344, 502). A registration (352) of multiple graphical objects (346, 510, 512) to the first magnetic resonance image is received which defines spatial positions of the multiple graphical objects in the first magnetic resonance image. The method further comprises repeatedly: acquiring (106, 210) second magnetic resonance data (354); reconstructing (108, 212) a second magnetic resonance image (356, 502′); receiving (110, 214) repositioning coordinates (358, 700) in the second magnetic resonance image for a first group (348, 510) selected from the multiple graphical objects; and determining (112, 216) a coordinate transformation (359, 702) of a second group (350, 512) selected from the multiple graphical objects by applying a coordinate transformation model (364) to the repositioning coordinates.",
  "claims": [
    "1. A medical instrument comprising: a magnetic resonance imaging system for acquiring magnetic resonance data from an imaging zone and; a high intensity focused ultrasound system with an adjustable focus, a processor for controlling the medical instrument; and a memory containing machine readable instructions for execution by the processor; wherein execution of the instructions causes the processor to acquire first magnetic resonance data with the magnetic resonance imaging system, reconstruct a first magnetic resonance image using the first magnetic resonance data, wherein from the first magnetic resonance image a treatment plan is formed for controlling the high intensity focused ultrasound system and the formation of the treatment plan includes identification of one or more graphical objects in the first magnetic resonance image, wherein execution of the instructions further causes the processor to receive a registration of the one or more graphical objects to the first magnetic resonance image, wherein the registration defines spatial positions of the one or more graphical objects with respect to the first magnetic resonance image, and wherein execution of the instructions further causes the processor to repeatedly: acquire second magnetic resonance data using the magnetic resonance imaging system; reconstruct a second magnetic resonance image using the second magnetic resonance data; receive repositioning coordinates in the second magnetic resonance image for a first group selected from the one or more graphical objects, wherein the repositioning coordinates describe a repositioning of the first group in the second magnetic resonance image with respect to the first magnetic resonance image; and determine a coordinate transformation of a second group selected from the one or more graphical objects by applying a coordinate transformation model to the repositioning coordinates and wherein execution of the instructions further causes the processor to repeatedly modify the treatment plan using the repositioning coordinates and the coordinate transformation, and control the high intensity focused ultrasound system in accordance with the modified treatment plan. 2. The medical instrument of claim 1, wherein the high intensity focused ultrasound system has an adjustable ultrasound intensity, wherein execution of the instructions further causes the processor to perform a reduced intensity sonication before acquisition of the first magnetic resonance data, wherein execution of the instructions causes the processor to check the registration using the first magnetic resonance image. 3. The medical instrument of claim 1, wherein the coordinate transformation model is a deformable shape model. 4. The medical instrument of claim 1, wherein each of the graphical objects has a tag, wherein the coordinate transformation of the second group is determined at least partially using the tag of each of the second group. 5. The medical instrument of claim 1, wherein the graphical objects are any one of the following: treatment cells, regions of interest, measured doses, planned target volumes, and combinations thereof. 6. The medical instrument of claim 1, wherein the memory further contains an image segmentation module containing machine readable instructions for execution by the processor for segmenting the second magnetic resonance image to determine the repositioning coordinates, and wherein execution of the instructions further causes the processor to receive the repositioning coordinates from the segmentation module. 7. The medical instrument of claim 1, wherein execution of the instructions further causes the processor to repeatedly display the second magnetic resonance image on a display razz, and wherein the repositioning coordinates are received from a user interface in response to displaying the second magnetic resonance data. 8. The medical instrument of claim 7, wherein execution of the instructions further causes the processor to display the first magnetic resonance image on the display, and wherein the registration is received from the user interface in response to displaying the first magnetic resonance data. 9. A computer program product comprising machine executable instructions for execution by a processor controlling a medical instrument, wherein the medical instrument comprises a magnetic resonance imaging system for acquiring magnetic resonance data from an imaging zone, and a high intensity focused ultrasound system with an adjustable focus, wherein execution of the instructions further causes the processor to acquire first magnetic resonance data with the magnetic resonance imaging system, and from the first magnetic resonance image form a treatment plan for controlling the high intensity focused ultrasound system and the formation of the treatment plan includes identification of one or more graphical objects in the first magnetic resonance image, wherein execution of the instructions further causes the processor to reconstruct a first magnetic resonance image using the first magnetic resonance data, wherein execution of the instructions further causes the processor to receive a registration of one or more graphical objects to the first magnetic resonance image, wherein the registration defines spatial positions of the one or more graphical objects with respect to the first magnetic resonance image, wherein execution of the instructions further causes the processor to repeatedly: acquire second magnetic resonance data using the magnetic resonance imaging system; reconstruct a second magnetic resonance image using the second magnetic resonance data; receive repositioning coordinates in the second magnetic resonance image for a first group selected from the one or more, graphical objects, wherein the repositioning coordinates describe a repositioning of the first group in the second magnetic resonance image with respect to the first magnetic resonance image; and determine a coordinate transformation of a second group selected from the one or more graphical objects by applying a coordinate transformation model to the repositioning coordinates and wherein execution of the instructions further causes the processor to repeatedly modify the treatment plan using the repositioning coordinates and the coordinate transformation, and control the high intensity focused ultrasound s m in accordance with the modified treatment plan. 10. A method of controlling the medical instrument, wherein the medical instrument comprises a magnetic resonance imaging system for acquiring magnetic resonance data from an imaging zone; and; a high intensity focused ultrasound system with an adjustable focus wherein the method comprises the steps of: acquiring first magnetic resonance data with the magnetic resonance imaging system; reconstructing a first magnetic resonance image using the first magnetic resonance data; receiving a registration of one or more graphical objects to the first magnetic resonance image; wherein the registration defines spatial positions of the one or more graphical objects with respect to the first magnetic resonance image; and from the first magnetic resonance image a treatment plan if formed for controlling the high intensity focused ultrasound system and the formation of the treatment plan includes identification of one or more graphical objects in the first magnetic resonance image, wherein execution of the instructions further causes the processor to acquiring second magnetic resonance data using the magnetic resonance imaging system; reconstructing a second magnetic resonance image using the second magnetic resonance data; receiving repositioning coordinates in the second magnetic resonance image for a first group selected from the one or more, graphical objects, wherein the repositioning coordinates describe a repositioning of the first group in the second magnetic resonance image with respect to the first magnetic resonance image; and determining a coordinate transformation of a second group selected from the one or more graphical objects by applying a coordinate transformation model to the repositioning coordinates and wherein execution of the instructions further causes the processor to repeatedly modify the treatment plan using the repositioning coordinates and the coordinate transformation and control the high intensity focused ultrasound system in accordance with the modified treatment plan."
  ],
  "cpc": [
    "A61N 7/00",
    "A61B 2090/364",
    "A61B 2090/374",
    "A61B 5/055",
    "A61B 5/742",
    "A61B 5/7475",
    "A61N 2007/0052",
    "A61N 5/1039",
    "A61N 7/02",
    "G01R 33/48",
    "G01R 33/4814",
    "G06T 11/003",
    "G06T 12/00"
  ],
  "assignees": [
    "KONINKL PHILIPS NV"
  ],
  "filing_date": "2013-03-28",
  "publication_date": "2015-02-19",
  "priority_date": "2012-04-12",
  "application_number": "US-201314391183-A",
  "family_id": "45999665",
  "citations": [
    "US2002131643A1",
    "US2005190955A1",
    "US2011152666A1",
    "US6019725A"
  ]
}