Original title: K-space trajectory calibration for improved precision of quantitative ultrashort echo time imaging
Authors: Latta, P. ; Starčuk jr., Zenon ; Gruwel, M. ; Tomanek, B.
Document type: Papers
Conference/Event: Measurement 2017. International Conference on Measurement /11./, Smolenice (SK), 20170529
Year: 2017
Language: eng
Abstract: Ultrashort echo time imaging (UTE) is often the method of choice for measurement of short-lived T2 signals from biological tissues. The UTE acquisition is based on radial or spiral sampling schemes which, in general, are sensitive to small discrepancies between prescribed and actual trajectories. Such errors are usually observed as image quality degradation, visible as ghosting or intensity variation. This is even more serious for quantitative applications when intensity variation can cause serious bias in the estimation of measured parameters such as proton density (PD). Here we investigate such behavior of UTE acquisition and demonstrate that proper calibration of the gradient channels could minimize these type of the errors. Phantom experiments proved the efficiency of the application trajectory calibration approach.
Keywords: K-space Trajectory Calibration; proton Density; ultrashort Echo Time (UTE)
Project no.: GA15-12607S (CEP)
Funding provider: GA ČR
Host item entry: 11th International Conference on Measurement, Measurement 2017. Proceedings, ISBN 978-80-972629-0-7

Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0274226

Permalink: http://www.nusl.cz/ntk/nusl-373442


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