Application of superb micro-vascular imaging (SMI) in obstetrics.

Superb Micro-vascular Imaging (SMI; Toshiba Medical Systems, Tokyo) is a new blood flow imaging technique that employs a unique algorithm to minimize motion artifacts by eliminating signals based on analysis of tissue movement. Compared to conventional blood flow imaging such as color and power Doppler imaging, SMI significantly reduces motion artifacts and can visualize low-velocity blood flow in small vessels. In the present report, the clinical value and future potential of SMI in obstetrics have been demonstrated for the first time. We believe this new blood flow imaging technique is acceptable for obstetricians for the purpose of perinatal clinical assessments.