Have you heard of the Optune? An old friend is still alive 8 years after diagnosis. She used this helmet after surgery and chemo. She was one of the army adopters. It was Cali, and her insurance covered the cost.
My wife refused Optune. She said it was too intrusive on her quality of life. She would need to shave her head every 2 days and were the arrays and backpack at least 18 hours a day.
The cost we were told was $21k a month and it would only extend life a few months. It might be a good solution for some but she wanted none of it.