title: The effect of aging and storage conditions on excised tissues as monitored by longitudinal relaxation dispersion profiles.
abstract: Knowledge about the dependence of NMR parameters of excised tissues on time and storage conditions is important for correct interpretation of in vivo clinical results based upon in vitro measurements which in many cases are easier to perform. Literature data on this topic are scarce and sometimes contradictory. In this study, we investigated the change of the proton longitudinal relaxation rate (1/T1) of freshly excised rat tissues with storage conditions over a wide range of proton Larmor frequencies (0.01-50 MHz). Special interest was paid to long-term storage in the deep frozen state. After deep freezing of tissue samples on dry ice, no significant changes in 1/T1 over the whole frequency range could be observed for brain tissue, whereas for muscle and liver tissue characteristic alterations were detected. We conclude that for normal brain tissue this storage procedure is suitable for the prediction of in vivo 1/T1 results from in vitro studies.
authors.affiliation: University of Mons, Department of Organic Chemistry, Medical Faculty, Belgium.
authors.forename: H W
authors.initials: HW
authors.lastname: Fischer
authors.forename: Y
authors.initials: Y
authors.lastname: Van Haverbeke
authors.forename: P A
authors.initials: PA
authors.lastname: Rinck
authors.forename: I
authors.initials: I
authors.lastname: Schmitz-Feuerhake
authors.forename: R N
authors.initials: RN
authors.lastname: Muller
mesh_terms: D000818:Animals; D001921:Brain / Q000002:abnormalities; D005260:Female; D005615:Freezing; D008099:Liver / Q000002:abnormalities; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009132:Muscles / Q000002:abnormalities; D011522:Protons; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors; D014021:Tissue Preservation
chemical_list: D011522:Protons