A 3D wavelet fusion approach for the reconstruction of isotropic‐resolution MR images from orthogonal anisotropic‐resolution scans
Abstract
Hardware constraints, scanning time limitations, patient movement, and signal‐to‐noise ratio (SNR) considerations, restrict the slice‐selection and the in‐plane resolutions of MRI differently, generally resulting in anisotropic voxels. This nonuniform sampling can be problematic, especially in image segmentation and clinical examination. To alleviate this, the acquisition is divided into (two or) three separate scans, with higher in‐plane resolutions and thick slices, yet orthogonal slice‐selection directions. In this work, a noniterative wavelet‐based approach for combining the three orthogonal scans is adopted, and its advantages compared with other existing methods, such as Fourier techniques, are discussed, including the consideration of the actual pulse response of the MRI scanner, and its lower computational complexity. Experimental results are shown on simulated and real 7 T MRI data. Magn Reson Med, 2011. © 2011 Wiley‐Liss, Inc.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 14, 2011
- Source ID
- 10.1002/mrm.23086
Entities
People
- Christophe Lenglet
- Essa Yacoub
- Guillermo Sapiro
- Iman Aganj
- Noam Harel
Organizations
- Defense Advanced Research Projects Agency
- National Geospatial-Intelligence Agency
- National Institutes of Health
- National Science Foundation
- Office of Naval Research
- University of Minnesota