Figure 3. Representative, sequential PCI of CO₂ gas production and aerogenic powders solution.

CO₂ gas was continuously produced, and the aerogenic powders gradually dissolved in the physiological saline. Images were obtained after the physiological saline injection at 0 s (a), 1 s (b), 30 s (c), and 4 min (d), respectively. The pixel size was 9 μm × 9 μm; the exposure time was 3 ms. AP indicates aerogenic powders. Scale bars: 1 mm.