Figure 1.

Fluorinated polymers for ¹⁹F MRI. A: The amorphous structure of ¹⁹F-TPU results in high mobility of fluorine atoms and in long T₂ relaxation times, enabling efficient MR image acquisition. Conversely, the high crystallinity of PVDF leads to short echo times, fast signal decay and short T₂. B: ¹⁹F-TPU was used to prepare polymeric fibers, which were braided into vascular scaffold materials enabling ¹⁹F MRI.