Arlene Glisson is a believer in East Carolina University's newest tool against cancer. "It's just a blessing," she said. "It gives you hope. The 71-year-old was talking about the CyberKnife, which began operation this month at the Leo W. Jenkins Cancer Center on the campus of the Brody School of Medicine at ECU. On Feb. 11, she became the first patient to be treated with the device that projects high doses of radiation at tumors with pinpoint accuracy.