I went to Dr. @ Houston Memorial Hermann to see about this treatment (or one similar upon hearing about it (gold nanoparticles with radiation beads or something to the effect .. he said not ready for prime time -- that was about 2 years ago).
"According to our media partner, the Houston Chronicle back in September 2019, Halas developed what she hopes may be a cure for prostate cancer. It's a treatment method involving nanoparticles, which can be 500 to 10,000 times thinner than a human hair. She invented the particles called "nanoshells "back in 1997, which are coated with a thin layer of gold.
Three years later, she and a colleague found a way to use these particles to attack cancer cells. They founded a company, Nanospectra Biosciences to develop the technology for commercial use. After a year, 13 out of 15 patients it was tested on were cancer-free. Now, as they wait for the FDA's approval, Halas explained why this achievement has a personal meaning for her."