F.A.C.E. 2 F@ce 2015 New High-Tech Devices

CONF 07 - 17:30 - 18:30

Novel Algorithms Criteria of Imaging for the best application of the Advanced CO2 Laser Technologies. Paolo BONAN (Florence, Italy)


The interaction between the color of the skin and various laser treatments is well known both in terms of effectiveness in terms of side effects. First-line of evaluation consists of “Skin and  its classification”. It was developed in 1975 by Thomas B. Fitzpatrick as a way to classify the typical response of different types of skin to ultraviolet (UV) light  and then updated to also contain non-white skin types. According to this new classification system, patients may belong to one of six categories, originating from the three ancient continents: Africa, Europe and Asia.

In the majority of cases, the diagnosis is obvious and takes a split second to make. For example, a black patient with African facial traits is automatically classified as ‘African’, regardless of where the patient lives. Similarly, a patient with obvious Asian features is classified as ‘Asian’ (in such a case, a light coloured skin will denote a northern Asian origin such as Siberia, while a darker skin will point to a southern Asian one such as the Philippines). As well, a patient with very light skin, blue eyes, blond hair and delicate features can be safely classified as ‘Nordic’.

The results of various studies show that when individuals are sampled from around the globe, the pattern seen is not a matter of discrete clusters  but rather gradients in genetic variation (gradual geographic variations in allele frequencies) that extend over the entire world.

The genetic discontinuities are  not only "racial" or continental in nature but depend even on historical and cultural factors that are more local in nature.

Given these difficulties, even if considering the different types of skin color in many ways and not only through the traditional classification, all that remains is to assess the procedural rules that we should adopt.

These can be classified as follows:

  • The skin and classification
  • The documentation
  • The PIH
  • The laser
  • The procedures
  • The medication

Our photodocumentation are produced by the use of QUANTIFICARE, a system capable to create images that, more than anything else, allows for effective treatment while reducing the risk of certain side effects such as PIH. The design is based on a physical copying mechanism that multiplies a sensor image into a number of identical copies that still carry the plenoptic information of interest. Via different optical filters, we can then recover the desired information. With this setup that high dynamic range, multispectral, polarization, and P can be achieved.