Image scanner to enhance cancer treatment

A new device to help radiation oncologists better diagnose and more precisely treat certain cancers has just been installed at the Comprehensive Cancer Center of UW Hospital and Clinics.

Known as the GE Discovery LS imaging scanner, the machine helps physicians target tumors by fusing two previously distinct types of information — the PET scan (positron emission tomography) and the CT scan (computed tomography) — into one image.

“PET scans help pinpoint cancer cells by showing us changes in cellular function, such as the rate at which cells use nutrients,” says Minesh Mehta, head of Radiation Oncology at the UW Comprehensive Cancer Center. “CT scans provide the best view of the body’s anatomical structure, which helps us pinpoint the location of the tumor. Now, instead of looking at the two scans side by side as we have in the past, we can use the new device to see the two scans fused into a single image. For patients who require both scans, we can more precisely treat their tumor — spare their normal tissue — as we customize their individual cancer care plan.”

Mehta says the new PET/CT scanner not only enhances the physician’s diagnostic confidence, but also reduces the patient’s exam time.

“The entire exam with this machine takes about 30 minutes,” Mehta says. “Accordingly, physicians have better information more quickly and patients can have results within an hour as opposed to as long as a day when the two exams are performed separately.”

Mehta says UW Hospital’s acquisition of the GE Discovery LS, which is manufactured by GE Medical Systems in Waukesha, symbolizes an approach to cancer treatment that is never satisfied with the status quo.

“Embracing new technologies is one of the ways we express our commitment to excellent care for our patients,” he says. “The PET/CT imaging scanner is one of several cutting-edge technologies we have in our repertoire. Used by our highly skilled clinicians to direct and monitor treatment, it will mean better quality of life and more people cured of their cancer.”