title: [A light field-based fast computation of digitally reconstructed radiographs].
abstract: Generation of digitally reconstructed radiographs (DDRs) is key to image-guided radiation therapy and widely used for 2D-3D image registration to verify the patient's position. The classic algorithms to generate DRRs with ray casting is time consuming to hamper the registration process. The authors describe the attempt to extend the light field rendering techniques from computer graphics, using the light field computed from ray casting to interpolate a DRRs image from a novel fixed viewpoint. Because most of the computation is performed in a preprocessing step, the speed is greatly accelerated and satisfactory DRRs can be obtained.
authors.affiliation: Department of Medical Engineering, 181 Hospital of PLA, Guilin 541002, China. liupeng2008gl@163.com
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.forename: Xun-Zu
authors.initials: XZ
authors.lastname: Lei
authors.forename: Ling-Hong
authors.initials: LH
authors.lastname: Zhou
mesh_terms: D000465:Algorithms; D003196:Computer Graphics; D006801:Humans; D021621:Imaging, Three-Dimensional; D011857:Radiographic Image Interpretation, Computer-Assisted; D011878:Radiotherapy / Q000295:instrumentation*