Dr. Fernando Sebastián Chiwo González Profile

Dr. Fernando Sebastián Chiwo González

Postdoctoral Researcher at Florida International University

SPIE Involvement:

Author

Websites:

Personal Website

Publications (2)

Proceedings Article | 10 October 2023 Poster + Paper

Multipolarized gold dipole nanoantennas for IR focal plane arrays: an infrared detection approach

Juan Moreno, Javier Lozoya, F. Chiwo, M. Ramírez-Elías, Francisco González

Proceedings Volume 12687, 126870H (2023) https://doi.org/10.1117/12.2676106

KEYWORDS: Nanoantennas, Electric fields, Gold, Polarization, Thermography, Terahertz radiation, Infrared radiation, Staring arrays, Reflectivity, Infrared detection

Read Abstract +

Proceedings Article | 5 September 2018 Paper

Noninvasive detection of collagen regeneration after an isotretinoin treatment and ablative laser surgery in patients with acne scars by Raman spectroscopy

F. S. Chiwo González, E. Guevara, M. G. Ramírez-Elías, C. Castillo-Martínez, C. E. Osornio-Martínez, R. Cabrera-Alonso, Francisco Pérez-Atamoros, F. J. González

Proceedings Volume 10728, 107280M (2018) https://doi.org/10.1117/12.2320016

KEYWORDS: Collagen, Raman spectroscopy, Surgery, Laser therapeutics, Wound healing, Principal component analysis, Terahertz technology, Gas lasers, Skin, Ablative surgery

Read Abstract +

Background: To the date, oral isotretinoin is the most effective treatment for acne scars, and by combining their use with an ablative surgery results in improving the effects of the skin restoration. However, it is highly recommended by dermatologists, to wait for a period of 6 months between the isotretinoin treatment and the laser surgery, and that relative high period of time can lead to negative effects like anxiety or psychological distress in the patients. Our objective is to demonstrate that combining an ablative laser surgery and an isotretinoin treatment at therapeutic doses improves the acne wound healing in a considerably short period of time in comparison with previous studies. Additionally, it is of our interest to evaluate the wound healing due the collagen regeneration by the use of Raman spectroscopy, recently used as a non-invasive medical tool for skin diseases. Method: The study was performed in 9 patients who underwent on an oral isotretinoin treatment due to the presence of acne scars on the face. All patients received one single treatment with a CO₂ Ablative Fractional Laser (AFL) on four zones of the face within a range of four weeks after isotretinoin treatment. Additionally, an untreated measurement in the elbow side of the arm acted as a control. Both treatments, the isotretinoin and the ablative surgery, were performed by the same dermatologist. The patients were evaluated by means of Raman spectroscopy before and after the treatment and for the data processing, two different statistical approaches were applied to the Raman spectra with the objective to assess the presence of a specific collagen type. Results: The patients showed normal wound healing post AFL treatments and it was shown that with a therapeutic dose of oral isotretinoin and with one single laser surgery in a relative short period of time, a collagen regeneration was observed. Conclusion: When combined AFL surgery and isotretinoin treatment at therapeutic doses, a regeneration of a type of collagen is observed, which is quantified non-invasively by Raman spectroscopy.

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years