FIGURE 3.

The images and fiberoptic thermometer measurements from the ramp-down experiment (A). Temperature ranges in black were inferred from the MR images of the LC thermometer. Temperatures in gray (along the y-axis) were measured by the fiberoptic probe near the LCMRV thermometer at the start and end of the acquired image (scan time duration 51.2 s). The * indicates that the fiberoptic temperature was within a SD of the lower bound of the LCMRV temperature (22.083°C, 21.66°C, or 16.802°C). In (B), the LCMRV-measured temperature is plotted against the fiberoptic probe-measured temperature. The bar on the LCMRV temperature represents the range of values for the LCMRV thermometer (Table 1) for each MRI acquisition, and the bar on the fiberoptic temperature is the range of fiberoptic probe values from the start of the MRI acquisition until the end of the MRI acquisition. Note that the LCMRV minimum temperature is 16.35°C, and the maximum temperature is 22.46°C. Each of the minimum and maxiumum LCMRV temperatures was measured 3 times at the end and start of the experiment, respectively (indicated in blue on the plot). LC, liquid crystal