System and method for providing an extended image of a patient
Inventors
SVENSSON, Stina • ANDERSSON, Sebastian • Eriksson, Kjell • WEISTRAND, Ola
Assignees
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Publication Number
US-11636594-B2
Publication Date
2023-04-25
Expiration Date
Abstract
A computer based method of obtaining a 3D image of a part of a patient's body is disclosed, based on a fraction image having a limited field-of-view and extending the field of view with information from an image of the patient's outline, obtained from a surface scan of the patient. Anatomical data from the planning image are preferably used to fill in the outline image, by means of a contour-guided deformable registration between the planning image and contour.
Core Innovation
The invention relates to creating a composite image of a patient by combining a first 3D image of a portion of a person having a first field of view with information derived from a surface scan of the exterior of the person to extend imaging beyond that field of view. A second 3D image of the outer contour of at least a part of the person is acquired based on the surface scan, where the outer contour comprises an area corresponding to the first field of view and extending outside of the first field of view.
Approximate image data are acquired inside of the outer contour to produce an approximate 3D image of the interior of the person. The approximate image data are obtained by setting a suitable uniform density value inside at least a part of the outer contour using a predetermined density value or using a CT image.
The composite 3D image is produced by applying data from the first image in the area of the approximate image corresponding to the first field of view. The composite concept is implemented as a computer-implemented method for generating an extended composite 3D patient image using a contour scanner/surface scan to supply the outer contour and image-composition logic to merge accurate limited-field-of-view image data with approximate extended interior data.
Claims Coverage
The document provides one independent claim. It recites a composite-image workflow that uses a surface scan to derive an outer contour extending beyond a limited field of view, generates approximate interior image data within that outer contour, and then applies the first image data within the original field of view to form the composite 3D image. Dependent refinements add specific modalities for the first image and specify alternative approaches for generating approximate interior data via deformable registration and/or atlas-based mapping, plus optional bone position and density information.
Surface-scan-derived outer contour extending beyond first field of view
Acquiring a surface scan corresponding to the exterior of the person; acquiring a second 3D image of the outer contour based on the surface scan, the outer contour comprising an area of the patient corresponding to the first field of view and extending outside of the first field of view.
Approximate interior image data within outer contour using uniform density and/or CT-based density
Acquiring approximate image data inside of the outer contour to produce an approximate 3D image of the interior of the person, wherein acquiring approximate image data includes setting a suitable uniform density value inside at least a part of the outer contour, the uniform density value being a predetermined density value or being based on a CT image; and in dependent forms, acquiring approximate interior data based on deformably registered CT or atlas image to the outer contour, and including bone position and density information.
Composite by applying first image data within first field of view region
Applying data from the first image in the area of the approximate image corresponding to the first field of view to create a composite 3D image.
Contour scanning device provides contour data for contour-based model
A computer system includes a contour scanning device providing contour data of a patient's body and a processor that calculates a contour-based model from that data.
Across the independent method claim and related refinements, the inventive coverage centers on extending a limited-field-of-view 3D image using a surface scan to create an outer contour that extends beyond the first field of view, generating approximate interior image data inside that outer contour using uniform density and related alternatives, and producing the composite 3D image by applying the first image data within the original field-of-view region.
Stated Advantages
Documented Applications
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