Method and apparatus for three dimensional image reconstruction from multiple stereotactic or isocentric backprojections
First Claim
1. A method for reconstructing a three dimensional image of an object from a plurality of radiographic images, comprising the steps of:
- backprojecting each radiographic image through a reconstruction volume to produce a plurality of corresponding backprojected images; and
determining an intersection of said plurality of backprojected images in said reconstruction volume, said intersection defining a three dimensional, reconstructed image of the object.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and apparatus for reconstructing a three dimensional image of an object from a plurality of two dimensional radiographic images includes the steps of performing radiography of the object from a point source to produce a two dimensional image on a film, backprojecting the two dimensional image through a reconstruction volume to the point source to produce a backprojected image, repeating these steps for a plurality of viewing angles and determining the intersection of the backprojected images and the reconstruction volume. This intersection defines a three dimensional, reconstructed image of the object for each view. Upon superimposition of these three dimensional reconstructed images, the voxels that all the images have in common define a final reconstructed image of the object. Additionally, the present invention includes a stereotactic localizer frame that has eight sides for providing at least four views of the object. The eight faces allow radiography of the object to be performed at almost any viewing angle. This method can be used in clinical applications for the reconstruction of three dimensional structures within the patient'"'"'s body through multiple two dimensional radiographic views of the patient.
-
Citations
16 Claims
-
1. A method for reconstructing a three dimensional image of an object from a plurality of radiographic images, comprising the steps of:
-
backprojecting each radiographic image through a reconstruction volume to produce a plurality of corresponding backprojected images; and determining an intersection of said plurality of backprojected images in said reconstruction volume, said intersection defining a three dimensional, reconstructed image of the object. - View Dependent Claims (2, 3, 4, 6, 7)
-
-
5. The method of 1, wherein said backprojecting step comprises:
backprojecting at least six radiographic images through a reconstruction volume to produce at least six corresponding backprojected images.
-
8. A method for three dimensional imaging of an object, comprising the steps of:
-
performing radiography of the object from a point source to produce a radiographic image on an image plane; backprojecting said radiographic image through a reconstruction volume to said point source to produce a backprojected image; repeating steps (a) and (b) for a plurality of imaging angles to produce a plurality of backprojected images; and determining an intersection of said plurality of backprojected images in said reconstruction volume, said intersection defining a three dimensional, reconstructed image of the object. - View Dependent Claims (9, 10, 11)
-
-
12. An apparatus for reconstructing a three dimensional image of an object from a plurality of radiographic images, comprising:
-
means for backprojecting each radiographic image through a reconstruction volume to produce a plurality of corresponding backprojected images; and means for determining an intersection of said plurality of backprojected images in said reconstruction volume, said intersection defining a three dimensional, reconstructed image of the object. - View Dependent Claims (13, 14, 15, 16)
-
Specification