Extended theory of selective photothermolysis

@article{Altshuler2001ExtendedTO,
  title={Extended theory of selective photothermolysis},
  author={Gregory B. Altshuler and R Rox Anderson and Dieter Manstein and Henry H. Zenzie and Mikhail Z. Smirnov},
  journal={Lasers in Surgery and Medicine},
  year={2001},
  volume={29}
}
We present a new theory of selective thermal damage of non‐uniformly pigmented structures in biological tissues. Spatial separation of the heavily pigmented areas and the target requires limitation of the pigment temperature and heat diffusion from the pigmented to the targeted areas. 
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References

SHOWING 1-10 OF 11 REFERENCES
New approaches to the treatment of vascular lesions
The pulsed dye laser was developed based on the concept of selective photothermolysis. By using a wavelength of light well absorbed by the target and pulse duration short enough to spatially confine
Selective photothermolysis: precise microsurgery by selective absorption of pulsed radiation.
TLDR
Hemodynamic, histological, and ultrastructural responses are discussed and a simple, predictive model is presented, showing selective damage to cutaneous microvessels and melanosomes within melanocytes after selectively absorbed optical radiation pulses.
Evaluation of cooling methods for laser dermatology
Skin cooling is used to protect the epidermis in a variety of laser dermatology procedures, including leg vein treatment, hair removal, and port wine stain removal. Spray and contact cooling are the
Comparative histochemistry of port-wine stains after copper vapor laser (578 nm) and argon laser treatment.
TLDR
The NBTC method allowed identification of subtle laser-induced tissue changes providing accurate quantitative data relating to the extent of vascular injury, and vessel selectivity of the 578 nm wave band was achieved with pulse widths from 50-74 ms, exceeding the estimated "ideal" exposure time for a vascular selective laser effect.
Is there an optimal laser treatment for port wine stains?
TLDR
The analysis shows that irradiation times of 1–10 ms in conjunction with external epidermal cooling may give optimal results and the CO2 laser is predicted to be the worst laser and, according to the analysis, should not be used to treat PWS.
Studies of Thermal Injury: II. The Relative Importance of Time and Surface Temperature in the Causation of Cutaneous Burns.
TLDR
Although Leach, Peters, and Rossiter made a careful study of the pathological characteristics of different kinds of burns of guinea-pig skin, the extent to which these chges are representative of those that occur in cutaneous burning in man was not disclosed.
Permanent hair removal by normal-mode ruby laser.
TLDR
Permanent, nonscarring alopecia can be induced by a single treatment with high-fluence ruby laser pulses, and miniaturization of the terminal hair follicles seems to account for this response.
Optical Properties of Circulating Human Blood in the Wavelength Range 400-2500 nm.
TLDR
A spectrum of all three parameters was measured in the wavelength range 400-2500 nm for oxygenated and deoxygenated blood, showing that blood absorption followed the absorption behavior of haemoglobin and water.
Optical properties of blood in the near-infrared spectral range
We determine the optical properties of whole blood samples in the near infrared spectral range from double integrating sphere measurements using an inverse Monte Carlo technique. The measured values
Hair follicular stem cells: the bulge-activation hypothesis.
...
1
2
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