Novel laser scans could scan breast for cancer without x-rays, if research at Caltech proves fruitful. Photoacoustic computed tomography, or PACT, works by shining a near-infrared laser pulse into the breast tissue, which is absorbed by oxygen-carrying hemoglobin molecules in red blood cells, causing the molecules to vibrate ultrasonically. Those vibrations travel through the tissue and ...
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from Electronics Weekly https://www.electronicsweekly.com/news/research-news/laser-scan-mooted-alternative-x-ray-mammography-2018-06/
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