RICE (US)—Using an off-the-shelf digital camera, researchers have created an inexpensive device that is powerful enough to let doctors easily distinguish cancerous cells from healthy cells simply by viewing the LCD monitor on the back of the camera.
The results of the first tests of the camera were published online in the open-access journal PLoS ONE.
“Consumer-grade cameras can serve as powerful platforms for diagnostic imaging,” says Rice University professor Rebecca Richards-Kortum, the study’s lead author. “Based on portability, performance and cost, you could make a case for using them both to lower health care costs in developed countries and to provide services that simply aren’t available in resource-poor countries.”
Richards-Kortum’s team has developed fluorescent dyes and targeted nanoparticles that let doctors zero in on the molecular hallmarks of cancer.
In the new study, the team captured images of cells with a small bundle of fiber-optic cables attached to a $400 Olympus E-330 camera.
When imaging tissues, Richards-Kortum’s team applied a common fluorescent dye that caused cell nuclei in the samples to glow brightly when lighted with the tip of the fiber-optic bundle. Three tissue types were tested: cancer cell cultures that were grown in a lab, tissue samples from newly resected tumors, and healthy tissue viewed in the mouths of patients.
Because the nuclei of cancerous and precancerous cells are notably distorted from those of healthy cells, Richards-Kortum says, abnormal cells were easily identifiable, even on the camera’s small LCD screen.
“The dyes and visual techniques that we used are the same sort that pathologists have used for many years to distinguish healthy cells from cancerous cells in biopsied tissue,” says study coauthor Mark Pierce, Rice faculty fellow in bioengineering. “But the tip of the imaging cable is small and rests lightly against the inside the cheek, so the procedure is considerably less painful than a biopsy and the results are available in seconds instead of days.”
Richards-Kortum says software could be written that would allow medical professionals who are not pathologists to use the device to distinguish healthy from nonhealthy cells. The device could then be used for routine cancer screening and to help oncologists track how well patients were responding to treatment.
“A portable, battery-powered device like this could be particularly useful for global health,” she says. “This could save many lives in countries where conventional diagnostic technology is simply too expensive.”
Researchers from the University of Texas M.D. Anderson Cancer Center also contributed to the work, which was funded by the National Institutes of Health.
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