Hundreds of cancer survivors and doctors flocked to the Anne Arundel Medical Center on Thursday to see bicycling champ Lance Armstrong unveil a high-tech system for treating tumors that was recently installed at the hospital's cancer center. Armstrong, who recovered from brain, lung and testicular cancer to win the grueling Tour de France, introduced the oncological experts who described the Novalis technique. The 20,000-pound Novalis machine fires multiple beams of radiation that intersect over a tumor, killing it and leaving healthy tissue unharmed. The latest in cancer-fighting technology, the Novalis technology is only at a handful of hospitals around the country. Its installation at the Anne Arundel Medical Center marked the completion of a $13 million expansion of the cancer center.