Work

Excitation UNFOLD (XUNFOLD) to improve the temporal resolution of multishot tailored RF pulses

Year: 2006

Type: article

Abstract: An extension of the "UNaliasing by Fourier encoding the Overlaps using the temporaL Dimension" (UNFOLD) method to the excitation domain (XUNFOLD) is presented to improve the temporal resolution of multishot tailored RF (TRF) pulses. Multishot three-dimensional TRF pulses were designed to produce a time series of images with periodically aliased excitation profiles. The XUNFOLD method is shown to remove the excitation profile aliasing from the dynamic imaging data by filtering in the temporal frequency dimension. The technique is demonstrated to improve the temporal resolution of simulated functional MRI (fMRI) activation in a time series of brain images.

Source: Magnetic Resonance in Medicine

DOI: 10.1002/mrm.21000

Authors: V. Andrew Stenger, Marius S. Giurgi, Fernando E. Boada, Douglas C. Noll

Institutions: University of Hawaiʻi at Mānoa, University of Hawaii System, University of Pittsburgh, University of Michigan

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

Open Access status: bronze

Funders: National Institute of Mental Health, National Institute on Drug Abuse

Awards: Pediatric fMRI Technology Development, G4621942747, fMRI Acquisition Informatics Tool, fMRI Acquisitions in Regions with Field Inhomogeneity