Nano- and femtosecond high-repetition-rate multipulse laser irradiation of dehydrated bone tissue: role of accumulated heat and model of cooling

Беликов, А. В.; Shamova, Alexandra; Shandybina, G. D.; Yakovlev, E. B.

doi:10.1070/qel16692

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…It is the initial temperature by the arrival of the next pulse in the region of the laser spot, and it is decisive in changing the surface morphology at the periphery, where laser radiation does not reach. In the experiment at pulse repetition rates below 15 kHz the morphology of bone surface is not changed [30], which is typical for small values of the residual temperature obtained in the calculation.…”

Section: Dry Bone: Irradiation With Nanosecond Laser Pulsessupporting

confidence: 52%

“…The model object is considered as the quasi-homogeneous medium with averaged values of thermophysical and optical characteristics. The obtained spatial distributions of accumulated heat on the surface of model object as a function of the pulse repetition rate are compared with the data of experimental irradiation of model object conducted by the authors and given in [30], as well as the experimental data presented in [18]. As will be shown in this paper, the model is applicable for nanosecond and femtosecond laser pulses.…”

Section: Introductionmentioning

confidence: 85%

“…It was found that at the repetition rate of 15 kHz the ablation crater is formed, surrounded by the larger areas of melted and carbonized tissue, at the sixth second of irradiation [30] (Fig. 4(a)).…”

Section: Dry Bone: Irradiation With Nanosecond Laser Pulsesmentioning

confidence: 99%

See 2 more Smart Citations

Modelling of the heat accumulation process during short and ultrashort pulsed laser irradiation of bone tissue

Yakovlev¹,

Shandybina²,

Shamova³

2019

Biomed. Opt. Express

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An analytical model is presented that qualitatively describes the cooling of a biological tissue after irradiation with short and ultrashort laser pulses. The assumption that the distribution of temperature at the initial moment of surface cooling repeats the distribution of the absorbed laser energy allowed us to use the thermal conductivity approximation in both cases. The experimental results of irradiation of dry bone with nanosecond and femtosecond laser pulses are compared with the calculated data. The necessity of taking into account the change in the optical parameters of hard tissue in the field of laser irradiation during its treatment by nanosecond and femtosecond laser pulses and the key role of residual heating in its carbonization around the exposure region is shown. The application of the model to a particular biological tissue can significantly simplify the search for optimal parameters of lasers for surgical procedures.

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Section: Dry Bone: Irradiation With Nanosecond Laser Pulsessupporting

confidence: 52%

Section: Introductionmentioning

confidence: 85%