M.D. Anderson opens new proton therapy center
7/17/2006 Houston, TX Juan A. Lozano Chron.com Knees bent and hands above his head, Francis Maloy lay on his back on a narrow, metallic table inside a white chamber, waiting for a giant wheel-like device to bombard the tumor in his chest with protons. "I had never heard of proton therapy. The last time I heard about protons I was in college taking physics," said Maloy, a 68-year-old retired Army colonel from Stuart, Fla., just before the procedure. Maloy, who has advanced lung cancer, is one of the first patients being treated at the University of Texas M.D. Anderson Cancer Center's new $125 million Proton Therapy Center. It is the largest of the nation's four such facilities that treat cancer by targeting protons narrowly on the tumor itself, sparing the healthy tissue that with traditional X-ray radiation therapy is blasted along with the cancer cells. From inside one of five treatment rooms in the 94,000 square-foot center, the gantry looks like the airlock of a science-fiction spaceship. But behind it sits the bending magnets, electrical wires and monitors that make up the gantry, encased in a steel barrel, three stories tall and weighing 190 tons. The protons, which are stripped from the nucleus of hydrogen atoms in a tubular device called an injector, are sent to a compact particle accelerator — actually a ring of magnets about 20 feet in diameter — called a synchrotron. There they circle around until they gather enough energy to irradiate a tumor before being [...]