title: Relaxation times in paramagnetically doped agarose gels as a function of temperature and ion concentration.
abstract: Tissue equivalent gels of NMR phantoms have been investigated at 3.4 MHz. The proton T1 and T2 relaxation times have been measured in Ni++ and Cu++ doped agarose gels as a function of temperature and ion concentration. Ni-agarose gels have the lower T1 temperature dependence, but gels containing both Cu++ and Ni++ can be produced for which T1 has virtually no temperature dependence.
authors.affiliation: Department of Medical Electronics and Physics, St. Bartholomew's Hospital Medical College, London, England.
authors.forename: F A
authors.initials: FA
authors.lastname: Howe
mesh_terms: D003300:Copper; D005782:Gels; D006801:Humans; D007477:Ions; D008279:Magnetic Resonance Imaging; D008961:Models, Structural; D009532:Nickel; D012685:Sepharose; D013696:Temperature
chemical_list: D005782:Gels; D007477:Ions; D003300:Copper; D009532:Nickel; D012685:Sepharose