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Caltech professor Lihong Wang has demonstrated a technology capable of imaging the human brain with laser light and ultrasonic sound waves. The technology is known as PACT, for photoacoustic computerized tomography. First developed to image tissues and organs, previous iterations of PACT have been able to image the inner structures of a rat’s body, and have even been able to detect breast tumors, granting the method potential as an alternative to mammograms.
Wang, in the latest work, has further improved the technology, making it precise and sensitive enough to be able to detect minute changes in the amount of blood traveling through tiny blood vessels, as well as the oxygenation level of that blood. Because blood flow…READ MORE