Table 1.

Hyperpolarized ¹³C agent information that we typically keep track of during our studies

HP 13C agent information	Purpose/description
HP 13C agent(s) injected	Describe the composition of the injected agents. Note that this can include simultaneous injection of multiple agents
Administration route of agent	How was the HP solution delivered
Total injected volume	How much HP solution was injected in total
Concentration of each HP agent	Concentration of each HP agent in HP solution
Start time of injection	Describe the timing of the start of injection, important to know relative to the data acquisition timing
Total injection duration	Over how long was the HP solution injected
Polarization	What was the measured polarization of the HP agent(s). Typically back-calculated to the time of dissolution
Polarization measurement timing	Timing of the polarization measurement relative to the data acquisition
Agent relaxation rates (e.g., T1)	Expected or measured relaxation rates used to calculate polarization
Dissolution timing	Timing of the dissolution of the HP agent, most important to know relative to the data acquisition