Technical Program

Paper Detail

Paper:	SU-AM-PS1.10
Session:	X-Ray CT, PET and SPECT Imaging
Time:	Sunday, April 9, 10:50 - 12:10
Presentation:	Poster
Title:	Atlas-Assisted Tomography: Registration of a Deformable Atlas to Compensate for Limited-Angle Cone-Beam Trajectory
Authors:	Ofri Sadowsky; The Johns Hopkins University
	Krishnakumar Ramamurthi; The Johns Hopkins University
	Lotta M. Ellingsen; The Johns Hopkins University
	Gouthami Chintalapani; The Johns Hopkins University
	Jerry L. Prince; The Johns Hopkins University
	Russell H. Taylor; The Johns Hopkins University
Abstract:	We present a method to improve the quality of cone-beam tomographic images computed from an intra-operative C-arm scan by adding information from an anatomical atlas. Limited range of C-arm view angles leads to reconstruction artifacts and poor anatomical detail. We propose to complete the missing views with simulated projections of a statistical anatomical model, which is deformably registered to match the data in the C-arm images. This paper presents the methods used to create the atlas and to register it with x-ray images. We compare the results of seven leave-one-out simulated hybrid reconstruction tests on a population of 13 subjects, with ``ground-truth'' CT, a classical short-scan, and a partial-scan reconstruction.

ISBI 2006 is sponsored by

and organized in cooperation with