Methods and systems for segmentation and surface matching
AssigneeElekta Limited
InventorsFabienne Lathuiliere, Veronique Audet, Tony Falco, Martin Lachaine
Life of this patent
Estimating the term…
Abstract
A contoured surface map of a lesion within a patient is obtained by shifting a reference surface to an estimated location in operational images. The process can be repeated to minimize errors, and the contoured surface map can then be segmented.
Claims38
A method for obtaining a contoured surface of a lesion within a patient, the method comprising the steps of:
- (a) providing a contoured reference surface of the lesion based on one or more images acquired at a first time;
- (b) generating a set of operational images of the lesion at a second time;
- (c) shifting the reference surface to an estimated location in the operational images;
- (d) segmenting the operational images based at least in part on the shifted reference surface;
- and
- (e) determining a contoured surface of the lesion at the second time based on the segmented images.
A system for obtaining a contoured image of a lesion, the system comprising:
- (a) a register for storing (i) a reference surface of the lesion based on one or more images acquired at a first time, (ii) a set of images of the lesion taken at a second time and (iii) estimated surface elements on at least one of the set of images;
- (b) a mapping module for mapping surface elements on the reference surface to the estimated surface elements on at least one of the set of images;
- and
- (c) a processor for shifting the reference surface based on the matched surface elements.
An article of manufacture having computer-readable program portions embodied thereon for determining the changes to a lesion for the purpose of administering radiation treatment to the lesion, the article comprising computer-readable instructions for:
- (a) providing a contoured surface of the lesion based on one or more images acquired at a first time as a reference surface;
- (b) generating a set of images of the lesion at a second time as operational images;
- (c) shifting the reference surface to an estimated location in the operational images;
- (d) segmenting the operational images based at least in part on the shifted reference surface;
- and
- (e) determining a contoured surface map of the lesion at the second time based on the segmented images.
Dependencies are inferred from the claim text.