The lowest possible temperature that can be obtained, at which all molecular motion discontinues. The unit is written as 0 K or 0 Kelvin, named after William Thomson, who developed the scale and became Lord Kelvin in 1892.
The analogous temperature in other units is:

(ADC) A diffusion coefficient to differentiate T2 shine through effects or artifacts from real ischemic lesions. In the human brain, water diffusion is a three-dimensional process that is not truly random because the diffusional motion of water is impeded by natural barriers. These barriers are cell membranes, myelin sheaths, white matter fiber tracts, and protein molecules.
The apparent water diffusion coefficients can be calculated by acquiring two or more images with a different gradient duration and amplitude (b-values). The contrast in the ADC map depends on the spatially distributed diffusion coefficient of the acquired tissues and does not contain T1 and T2* values.
The increased sensitivity of diffusion-weighted MRI in detecting acute ischemia is thought to be the result of the water shift intracellularly restricting motion of water protons (cytotoxic edema), whereas the conventional T2 weighted images show signal alteration mostly as a result of vasogenic edema.
The reduced ADC value also could be the result of decreased temperature in the nonperfused tissues, loss of brain pulsations leading to a decrease in apparent proton motion, increased tissue osmolality associated with ischemia, or a combination of these factors. The lower ADC measurements seen with early ischemia, have not been fully established, however, a lower apparent ADC is a sensitive indicator of early ischemic brain at a stage when ischemic tissue remains potentially salvageable.

See also Diffusion Weighted Imaging and Diffusion Tensor Tractography.

Imaging with two different methods - fluorescence and MRI. Molecular imaging agents may be useful in bimodal imaging.

Texas-based university research group. Current projects include: 'Multi-Modal Molecular Imaging Agents' or 'Micro-Fluidics and Nanosensing'. For example, the research group is evaluating Ln-PK-11195 as a bimodal imaging contrast agent for brain cancer detection by MRI and fluorescence.
Please see their Current Projects Abstracts for complete coverage.

Bound spins. Protons in water, bound caused hydration at macromolecules. Bound spins have no defined Larmor frequency and are not visible in the image.