| 摘要 |
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. |
