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T1-weighting of Hahn echo-trains in the stray-field for deuterium: prospects for imaging using long echo-train summation by Edward W Randall; Teresa G Nunes; Geneviève Guillot; Philippe R Bodart is a Chemistry article available to read on EtoBox.

What is T1-weighting of Hahn echo-trains in the stray-field for deuterium: prospects for imaging using long echo-train summation about?

Hahn-echoes have been observed in stray-field gradients of 37.5 Trm and 74.5 Trm for deuterium in heavy water in a number of forms: liquid, ice, and coordinated in solid copper sulfate and silica gel. In the diamagnetic samples, the Ž . application of many pulses ) 1000 or more in long pulse-trains produced many sustained echoes. This lengthening of T echo Ž . is caused by T -weighting of the components of the Hahn echo even in the absence of spin-locking . In contrast, for the 1 paramagnetic complex, the shortening of T greatly reduces T and only few echoes are obtained. A new protocol for 1 echo Ž . stray field imaging is suggested when T is long: long echo-train summation LETS . The observed magnetisation is much 1 greater for heavy ice than for heavy water because the line-width, and hence the thickness of the excited slice, is greater.

Who reads T1-weighting of Hahn echo-trains in the stray-field for deuterium: prospects for imaging using long echo-train summation?

Author

Edward W Randall; Teresa G Nunes; Geneviève Guillot; Philippe R Bodart

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0926-2040)

Published

1999

Language

EN

Field

Chemistry (Physical Sciences)