The present disclosure provides systems, devices, and/or methods for
assessing body fluid-related metrics and/or changes therein. The
disclosure further provides systems, devices, and/or methods for
correlating body fluid-related metrics in a particular tissue with the
corresponding whole-body metric. The disclosure also provides, systems,
devices, and/or methods for assessment of such metrics to facilitate
diagnosis and/or therapeutic interventions related to maintaining and/or
restoring body fluid balance.