<unk>  is a functional medical imaging technique for probing perfusion and metabolism using injected substrates. It is enabled by techniques for hyperpolarization of<unk> -13-containing molecules using dynamic nuclear polarization and rapid dissolution to create an injectable solution. Following the injection of a<unk>  substrate, metabolic activity can be mapped based on enzymatic conversion of the injected molecule. In contrast with other metabolic imaging methods such as positron emission tomography,<unk>  provides chemical as well as spatial information, allowing this technique to be used to probe the activity of specific metabolic pathways. This has led to new ways of imaging disease. For example, metabolic conversion of<unk>  pyruvate into lactate is increasingly being used to image cancerous tissues via the Warburg effect.
Hyperpolarized carbon-13 MRI
Gated SPECT
Magnetic resonance cholangiopancreatography
Acid perfusion test
Splenic aspiration
Orthogonal polarization spectral imaging
Magnetic resonance spectroscopic imaging
Xenon gas MRI