Codd, S.L. and Mallett, M.J.D. and Halse, M.R. and Strange, J.H. and Vennart, W. and VanDoorn, T. (1996) A three-dimensional NMR imaging scheme utilizing doubly resonant gradient coils. Journal of Magnetic Resonance Series B, 113 (3). pp. 214-221. ISSN 1064-1866.
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A 3DFT gradient-echo technique has been developed which, in conjunction with series-resonant gradient-coil circuits, can produce three-dimensional NMR images with an echo time of less than 100 mu s. The method involves a read-gradient waveform composed of two sinusoids of different frequencies. This is an improvement on previous imaging sequences using a single sinusoid where only half of k space was sampled and where the second half was calculated using conjugate symmetry. The inaccuracies involved in the necessary ''cut and paste'' of k space inevitably lead to artifacts in the final image. The important features of the new method are that with suitable phase encoding all octants of k space are sampled, the RF pulse is applied when the gradients are all zero, and the echo forms when the gradient is essentially constant. This method will allow more extensive application of solid imaging techniques to biological samples in vivo.
Q Science > QC Physics
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||M.A. Ziai|
|Date Deposited:||15 May 2009 08:27|
|Last Modified:||15 May 2009 08:27|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/18882 (The current URI for this page, for reference purposes)|
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