Format

Send to

Choose Destination
See comment in PubMed Commons below
Biophys Chem. 1994 May;50(1-2):225-35.

Use of static and dynamic NMR microscopy to investigate the origins of contrast in images of biological tissues.

Author information

1
Department of Physics and Biophysics, Massey University, Palmerston North, New Zealand.

Abstract

NMR imaging experiments have been carried out on a fruit (Actinidia deliciosa) and plant stem (Stachys sylvatica) using a wide range of image contrasts. These included T1, T2, T2*, diffusion, flow and chemical shift selection. In the case of fruit imaging we calculated relaxation time and diffusion maps and established that the imaged parameters varied significantly with fruit ripening. These changes we attribute to changes in water dynamics resulting from elevated sugar concentrations. For the plant stem, water flow has been observed in the xylem vessels with a maximum velocity of 70 microns s-1. The role of image artifacts is considered and, in the case of transverse relaxation, we have demonstrated that it is necessary to use a precursor Carr-Purcell-Meiboom-Gill pulse train if additional diffusive attenuation is to be avoided.

PMID:
8011936
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center