Editing Biophotonics (section)

==== Photoacoustic microscopy (PAM) ====
Photoacoustic microscopy (PAM) is an imaging technology that utilizes both laser technology and ultrasound technology.  This dual imaging modality is far superior at imaging deep tissue and vascular tissues than previous imaging technologies. The improvement in resolution provides higher quality images of deep tissues and vascular systems, allowing non-invasive differentiation of cancerous tissues vs healthy tissue by observing such things as "water content, oxygen saturation level, and hemoglobin concentration".<ref>{{Cite journal|last1=Yao|first1=Junjie|last2=Wang|first2=Lihong V.|date=2014-06-01|title=Sensitivity of photoacoustic microscopy|journal=Photoacoustics|volume=2|issue=2|pages=87–101|doi=10.1016/j.pacs.2014.04.002|pmid=25302158|pmc=4182819|bibcode=2014PhAco...2...87Y }}</ref> Researchers have also been able to use PAM to diagnose endometriosis in rats.<ref name=":1" />
[[File:Light_Penetration.png|thumb|Shows the depth of penetration of light through human skin|alt=]]