Table 1 Overview of the characteristics of the contrast agents used in the study [24,25,26]
Contrast agent | Shell material | Gas | Diameter and shell thickness | Resonance frequency |
|---|---|---|---|---|
Thick-shelled MBs (in-house made) | Polymer | Air | 3.8 ± 0.6 μm 700 nm | 12 MHz |
Thin-shelled MBs (SonoVue) | Phospholipid | Sulfur hexaflouride | 2.5 (1–10 μm) 4 nm | 1–4 MHz |