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Shorter wavelengths could improve contrast in optical mammography.
2004 JUL 1 - (NewsRx.com & NewsRx.net) -- Shorter wavelengths in optical mammography may better help detect tumors.
P. Taroni, of Milan, Italy, and colleagues found that decreasing wavelength increased optical contrast. "The optical contrast proved to increase upon decreasing wavelengths for the detection of cancers in late-gated intensity images, with higher gain in contrast for lesions of smaller size (
"For cysts, either a progressive increase or decrease in contrast with wavelength was observed in scattering images," they said.
"The detection of tumors with time-resolved transmittance imaging relies essentially on blood absorption," Taroni and associates explained. "Previous theoretical and phantom studies have shown that both contrast and spatial resolution of optical images are affected by the optical properties of the background medium, and high absorption and scattering are generally beneficial."
Thus, the researchers noted, "Based on these observations, wavelengths shorter than presently used (680-780 nm) could be profitable for optical ...
- Shorter wavelengths could improve contrast in optical mammography.
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Source: HighBeam Research, Shorter wavelengths could improve contrast in optical mammography.