Focused ultrasound is already used to destroy tumors, with most approaches using either high-intensity beams to heat and destroy cells or injected contrast dyes. But both approaches can harm healthy cells and contrast dyes work only for a minority of tumors.
from WebMD Health https://www.webmd.com/cancer/news/20200110/targeted-ultrasound-destroys-cancer-without-harming-healthy-cells-study?src=RSS_PUBLIC
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