The invention relates to a method of dynamic nuclear polarisation (DNP) using a combination of a trityl radical and a paramagnetic metal ion as the polarising agent leading to enhanced levels of polarisation in the sample to be polarised and to compositions and polarising agents for use in the method.
The invention relates to a dynamic nuclear polarisation method for producing hyperpolarised carboxylates of organic amines and amino compounds and compositions for use in that method. The DNP agent preferably is a stable oxygen-based, sulphur-based or carbon-based trityl radical. Optionally a paramagnetic metal ion is present.
The present invention relates to novel compounds of formula (I) and (II), compositions comprising compounds of formula (II) and their use as contrast agents in magnetic resonance (MR) imaging (MRI) and MR spectroscopy (MRS).