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Methods and systems for segmentation and surface matching

  • US 8,929,621 B2
  • Filed: 12/20/2005
  • Issued: 01/06/2015
  • Est. Priority Date: 12/20/2005
  • Status: Active Grant
First Claim
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1. A method of obtaining a contoured surface representation of a lesion within a patient, the method comprising:

  • obtaining a first contour representing an outer surface of the lesion at a first time prior to treatment, the first contour having been obtained from one or more planning images of the lesion acquired at the first time, the first contour including a first set of surface elements;

    obtaining a set of treatment images of the lesion, the treatment images having been acquired from the patient during a treatment session at a second time later than the first time, wherein the treatment images include a second set of surface elements corresponding to the lesion during the treatment session at the second time;

    positioning the first contour from the planning images within the set of treatment images at a location corresponding to the lesion;

    calculating a mapping between the first set of surface elements and the second set of surface elements;

    adjusting the first set of surface elements based on the calculated mapping by using the first contour as an initial estimate;

    obtaining, based on the adjusted first set of surface elements, a second contour of the lesion from the treatment images obtained during the treatment session, the second contour representing the outer surface of the lesion at the second time; and

    generating display data to present the second contour of the lesion on a display.

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