Figure 3 | NPG Asia Materials

Figure 3

From: An advanced in situ imaging method using heavy metal-doped hollow tubes to evaluate the biokinetics of carbon nanotubes in vivo

Figure 3

Magnetic resonance imaging (MRI) detection in agarose gel filled with Gd-peapods. (a) Contrast-to-noise ratio (CNR) of agarose gel with Gd-peapods by repetition time (TR) adjustment. A CNR peak appears with a TR of 50 ms. (b) CNR of agarose gel with Gd-peapods by flip angle (FA) adjustment. As FA decreases, the CNR increases and peaks at 35.7°. However, FA decreases at ⩽35.7°, and resolution of the images is reduced. (c) An evaluation of gel cube filled with Gd-peapods using MRI. The CNR depends on Gd-peapods concentration. Using a calibration curve, we determined that the detection limit was 4 μg ml−1.

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