Biomedical engineer Zhen Xu has spent a quarter of a century developing a non-invasive, ultrasound-based technique to treat tumor cells, in what is potentially a breakthrough treatment of cancer.Xu co-invented the histotripsy technique, which can target and liquefy tumor cells while leaving surrounding tissue unharmed. Unlike conventional invasive cancer procedures, no incision is required.HistoSonics, a start-up she co-founded in 2009, was named by Time magazine this year as one of the world's 10 most influential health and life science companies. In August, a consortium of investors value…READ FULL ARTICLE