Phantom substances for the quantitative evaluation of MR T images. I. Paramagnetic agar gels for the optimal simulation of tissue specific MR T parameters

: Reference material for quantitative magnetic resonance imaging (MRI) has been developed by combining water, gelling agent agar, and paramagnetic ions (Gd3+). By in-vitro measurement of the relaxation times T1 and T2 it can be shown that tissue-relevant values can be attained. The substances described are physically and chemically stable and can be handled without problems.