Visualizing and characterizing vascular structures is important for many areas of health care, from accessing difficult veins and arteries for laboratory testing, to diagnosis and treatment of cardiovascular disease. Photoacoustic (PA) imaging, one of the fastest growing fields of biomedical imaging, is well suited for this task. PA imaging is based on the photoacoustic effect, which starts with a pulsed laser source incident on biological tissue. If the wavelength of the source matches an absorption wavelength of a chromophore within the tissue, a portion of the pulse energy is absorbed by the chromophore and converted into heat. A subsequent increase in temperature, followed by an increase in pressure occurs. Acoustic waves are emitted when this pressure relaxes, which can be detected at the surface of the tissue. PA imaging is considered absorption based, therefore spectroscopic information can be extracted. Yet, unlike purely optical imaging techniques, multiple centimeters of depth can...
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Boise State University
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September 2013
Technical Briefs
All-Optical Photoacoustic Detection of Absorbers in Tissue Phantoms
Michelle Sabick,
Boise State University
Michelle Sabick
Department of Mechanical and Biomedical Engineering
,Boise State University
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Kasper VanWijk
Boise State University
Kasper VanWijk
Department of Geosciences
,Boise State University
Search for other works by this author on:
Michelle Sabick
Department of Mechanical and Biomedical Engineering
,Boise State University
Kasper VanWijk
Department of Geosciences
,Boise State University
Manuscript received March 15, 2013; final manuscript received April 29, 2013; published online July 3, 2013. Assoc. Editor: Arthur G. Erdman.
J. Med. Devices. Sep 2013, 7(3): 030901 (2 pages)
Published Online: July 3, 2013
Article history
Received:
March 15, 2013
Revision Received:
April 29, 2013
Citation
Johnson, J., Sabick, M., and VanWijk, K. (July 3, 2013). "All-Optical Photoacoustic Detection of Absorbers in Tissue Phantoms." ASME. J. Med. Devices. September 2013; 7(3): 030901. https://doi.org/10.1115/1.4024483
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