Why does ultra sound that kills internal cancers not kill the healthy skin cells it has to pass through to reach the cancer?
Related question...
It seems like ultra sound would be an ideal non-invasive treatment for skin cancer and benign, but unsightly, skin lesions.
However, no mention of that.
A cancer cell and a healthy cell will have different ‘resonant frequencies.’ This means that a healthy cell will not react with the ultrasound energy that is ‘tuned’ to the resonant frequency of the cancer cells.
This may also lead to therapies to destroy other types of cancers, since each type of cancer will have a different resonant frequency.
I envision a MRI-Like machine that a person with cancer would be put in and scanned for cancer that would be then treated with the unique ultrasound frequency for the entire body.....................
Robert Heinlein, the first science fiction Grand Master, predicted this in his novelette, “The Sixth Column”, first published in 1941!.................
By focusing the sound waves upon a point of constructive interference below the surface. What I don't understand is how they do that accurately through tissues of variable density.