The influence of chemical and diffusive exchange on water proton transverse relaxation in plant tissues

B. P. Hills, S. L. Duce

Research output: Contribution to journalArticlepeer-review

101 Citations (Scopus)

Abstract

Transverse water proton relaxation in parenchyma tissue of courgette, onion and apple shows a dependence on CPMG pulse spacing characteristic of each tissue. An analysis of this dependence suggests that transverse relaxation in these tissues is caused by various combinations of fast proton exchange between water and cell biopolymers (or solutes) and diffusion through internally generated magnetic field gradients. Diffusion between intra- and extracellular water compartments also averages the water proton signal to an extent that depends on cell morphology and membrane permeability and this is calculated using a two-compartment model. No recourse need be made to popular concepts such as exchange between free and "bound" water. The implications of our results for NMR image contrast are discussed.

Original languageEnglish
Pages (from-to)321-331
Number of pages11
JournalMagnetic Resonance Imaging
Volume8
Issue number3
DOIs
Publication statusPublished - 1990

Keywords

  • Biological tissue
  • Cells
  • Plant tissue
  • Proton NMR
  • Spin-spin relaxation
  • T
  • Water relaxation

ASJC Scopus subject areas

  • Biophysics
  • Biomedical Engineering
  • Radiology Nuclear Medicine and imaging

Fingerprint

Dive into the research topics of 'The influence of chemical and diffusive exchange on water proton transverse relaxation in plant tissues'. Together they form a unique fingerprint.

Cite this