Multi-Intensity Optimization-Based CT and Cone Beam CT Image Registration

Evaluation of Deformable Image Registration-Based Contour Propagation From Planning CT to Cone-Beam CT

PURPOSE We evaluated the performance of organ contour propagation from a planning computed tomography to cone-beam computed tomography with deformable image registration by comparing contours to manual contouring. MATERIALS AND METHODS Sixteen patients were retrospectively identified based on showing considerable physical change throughout the course of treatment. Multiple organs in the 3 reg...

Demons deformable registration of CT and cone-beam CT using an iterative intensity matching approach.

PURPOSE A method of intensity-based deformable registration of CT and cone-beam CT (CBCT) images is described, in which intensity correction occurs simultaneously within the iterative registration process. The method preserves the speed and simplicity of the popular Demons algorithm while providing robustness and accuracy in the presence of large mismatch between CT and CBCT voxel values ("inte...

WE-E-213CD-04: CT to Cone-Beam CT Deformable Registration With Simultaneous Intensity Correction.

PURPOSE To develop and validate a robust CT to cone-beam (CBCT) deformable image registration algorithm that can handle CBCT artifacts and intensity inconsistency, and thus can yield accurate registration results. METHODS We propose a new algorithm called Deformation with Intensity Simultaneously Corrected (DISC). DISC distinguishes itself from the original demons by performing an intensity c...

Common Image Artifacts in Cone Beam CT

Automatic image-to-world registration based on x-ray projections in cone-beam CT-guided interventions.

Intraoperative imaging offers a means to account for morphological changes occurring during the procedure and resolve geometric uncertainties via integration with a surgical navigation system. Such integration requires registration of the image and world reference frames, conventionally a time consuming, error-prone manual process. This work presents a method of automatic image-to-world registr...