Some applications of ultrashort laser pulses in biology and medicine
Författare
Summary, in English
Ultrashort laser pulses are finding increasing applications in biology and medicine. Such pulses can be used directly or after non-linear modification. Direct utilization includes propagation studies in scattering media with applications in optical mammography, dosimetry for photodynamic therapy and species concentration assessment. Intense continua of electromagnetic radiation of very brief duration are formed in the interaction of focused ultrashort and intense laser pulses with matter. Two different kinds of experiment using such radiation are described, employing visible radiation and x-rays, respectively. Focusing into water leads to the generation of a light continuum through self-phase modulation. The propagation of the light through tissue was studied, addressing questions related to specific tissue chromophore absorption. When terawatt laser pulses are focused onto a solid target with high nuclear charge Z, intense x-ray radiation of few ps duration and with energies exceeding hundreds of keV is emitted. Biomedical applications of this radiation are described, including differential absorption and gated-viewing imaging.
Avdelning/ar
Publiceringsår
2001
Språk
Engelska
Sidor
1777-1783
Publikation/Tidskrift/Serie
Measurement Science & Technology
Volym
12
Issue
11
Fulltext
- Available as PDF - 504 kB
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Dokumenttyp
Artikel i tidskrift
Förlag
IOP Publishing
Ämne
- Atom and Molecular Physics and Optics
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0957-0233