Automated anatomy delineation for image guided therapy planning
AssigneeKoninklijke Philips N.V.
InventorsVladimir Pekar, Daniel Bystrov
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Abstract
When delineating anatomical structures in a medical image of a patient for radiotherapy planning, a processor (18) detects landmarks (24) in a low-resolution image (e.g., MRI or low-dose CT) and maps the detected landmarks to reference landmarks (28) in a reference contour of the anatomical structure. The mapped landmarks facilitate adjusting the reference contour to fit the anatomical structure. The adjusted reference contour data is transformed and applied to a second image using a thin-plate spline, and the adjusted high-resolution image is used for radiotherapy planning.
Claims20
A system that facilitates delineating anatomical features in images used for image-guided therapy planning, including:
- an imaging device;
- a therapy planning processor;
- and
- an electronic processor programmed to:
- map anatomical landmarks detected in an initial image received from the imaging device to reference landmarks in a reference contour corresponding to the anatomical structure;
- adjust the reference contour to the anatomical structure based on mapped landmark pairs;
- adjust a contour of the anatomical structure in a second image, received from the imaging device, of the anatomical structure using the adjusted reference contour;
- and
- provide the adjusted second image to the therapy planning processor.
A method of delineating anatomical features in images used for image-guided therapy planning, including, with at least one computer processor:
- mapping detected anatomical landmarks detected in an initial image to reference landmarks in a reference contour corresponding to the anatomical structure;
- adjusting the reference contour to the anatomical structure based on the mapped landmark pairs;
- adjusting a contour of the anatomical structure in a second image using the adjusted reference contour;
- and
- generating a therapy plan based at least in part on the adjusted second image.
A non-transitory computer-readable medium that stores computer-executable instructions for generating a therapy plan for a patient, for execution by a processor, the instructions including:
- mapping detected landmarks in a low-resolution image of the patient using at least one of a magnetic resonance imagine (MRI) device and a computed tomography (CT) scanner to reference landmarks in a reference contour stored in a memory;
- employing one or more thin-plate splines to adjust the reference contour to fit a contour of the anatomical structure using the mapped landmarks;
- applying the adjusted reference contour to a second image of the anatomical structure to adjust the second image;
- and
- generating a radiotherapy plan based at least in part on the adjusted second image.
Dependencies are inferred from the claim text.