When Mike Stevens learned his lungs were riddled with cancer, it took only a week to start chemotherapy - but six weeks to find out if it was doing any good. "You're going through all this suffering and stuff and you want to know, am I going to survive? Is this stuff working?" said Stevens, 48, of La Jolla, Calif. "Your whole life is in sort of a limbo."
Doctors typically must wait weeks or months to see if a treatment is shrinking tumors or at least halting their growth. But researchers are exploring a new use for medical imaging that could shorten the stay in purgatory, possibly revealing within a few days whether chemo is working.
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