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eLearning

SINAPSE experts from around Scotland have developed ten online modules designed to explain medical imaging. They are freely available and are intended for non-specialists.


Edinburgh Imaging Academy at the University of Edinburgh offers the following online programmes through a virtual learning environment:

Neuroimaging for Research MSc/Dip/Cert

Imaging MSc/Dip/Cert

PET-MR Principles & Applications Cert

Applied Medical Image Analysis Cert

Online Short Courses

The use of contrast agents with fast field-cycling magnetic resonance imaging

Author(s): Dara Ó Hógáin, Gareth R Davies, Simona Baroni, Silvio Aime, David J Lurie

Abstract:
Fast field-cycling (FFC) MRI allows switching of the magnetic field during an imaging scan. FFC-MRI takes advantage of the T 1 dispersion properties of contrast agents to improve contrast, thus enabling more sensitive detection of the agent. A new contrast agent designed specifically for use with FFC was imaged using both a homebuilt FFC-MRI system and a 3 T Philips clinical MRI scanner. T 1 dispersion curves were obtained using a commercial relaxometer which showed large changes in relaxation rate between fields. A model of magnetization behaviour was used to predict optimum evolution times for the maximum T 1 contrast between samples at each field. Images were processed and analysed to create maps of R 1 values using a set of images at each field. The R 1 maps produced at two different fields were then subtracted from each other in order to create a map of Δ R 1 in which pixel values depend on the change in R 1 of the sample between the two fields. The dispersion properties of the agent resulted in higher contrast in a Δ R 1 image compared with a standard T 1 -weighted image.

Full version: Available here

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ISBN: 0031-9155
Publication Year: 2011
Periodical: Physics in Medicine and Biology
Periodical Number: 1
Volume: 56
Pages: 105
Author Address: