“…With the development of ultrasound contrast technology and manufacture of microbubble contrast agent which can carry gene, ultrasound has been used for therapy as well as diagnosis (Kusumanto et al, 2007;Domenici et al, 2013;Yuan et al, 2013). Contrast agent microbubbles combined with ultrasound-mediated targeted transfection of gene is a new, non-invasive, effective and convenient technique and can be used in the treatment of tumor or cardiovascular disease (Gong et al, 2014;Liao et al, 2014;Sun et al, 2014).…”