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Skin diagnostics in cosmetology

Diagnostics in medicine is constantly being modified. Progress has stepped forward, mainly due to the development of computer technology and visualization methods.
Dermatology and cosmetology have come to more accurate and more complex methods of diagnostic research, which are based on the principles of evidence-based medicine 1.

We made an overview of the most successful and promising methods that today can be implemented in our own practice.

Modern diagnostic methods in medicine are divided into:
imaging (visual methods such as digital photography, ultrasound or x-ray)
quantitative (deliver a quantitative signal, for example, in the form of an electric current or potential difference).
Photo documentation
The issue of centralized photofixation of patients is becoming increasingly important for clinics. As a rule, professional photo cameras and specialized software are used in photo documentation systems, which makes it possible to conveniently store high-quality photographs of patients, quickly compose collages before / after, and comply with all legal requirements.

In modern systems for photo documentation of patients, the link has face recognition technology for obtaining images with uniform illumination settings and automatic distribution of images in patient folders.

3D scan
3D scanners are now beginning to be introduced into many areas of medicine. They allow you to create accurate 3D-models of the structure of the human body.

In dermatology and cosmetology are used to accurately measure and study human skin. For example, using a 3D scanner, you can quantitatively calculate the level of skin roughness, the severity of wrinkles, the degree of cellulite, and also use the apparatus to study the morphological characteristics of the skin in cases of suspected cancer 2. Sensors in such scanners can be equipped with a narrow-band light source in the blue region of the spectrum, and the image The output skin is contrasted and well readable. Plastic surgeons can visually demonstrate the results of future work to the patient by building a three-dimensional model.

3D LifeViz
Today, such devices can be produced in a portable form factor. In 2018, one of these cameras in Monaco received the Innovation Award as the world’s most compact camera for 3D analysis and simulation of procedure results – 3D LifeViz (France). The camera helps the doctor demonstrate to patients the real and objective picture, show what results are possible, and get an independent before-and-after examination. Real-time modeling of the face, body and chest clearly demonstrates what expectations can be realized taking into account the anatomical features. Using a multivariate analysis, the doctor is able to evaluate the patient’s skin condition in one click and summarize all the analytical data in a report: wrinkles, pores, oiliness, smoothness, blood vessels and pigmentation.

An obligatory stage before injection procedures is photo documentation of clients. It is the 3D LifeViz system that allows you to convince customers to carry out the procedure and instantly evaluate the result
Alena Saromytskaya, dermatovenerologist, cosmetologist
The equipment is made as convenient as possible to use: images are copied via the USB port in a couple of minutes, the doctor can choose the most suitable option for comparison (“before and after” on one screen, slider or silhouette) in an intuitive interface, the results are easily exported as an image with a high resolution either as a video. The 3D camera exists in three versions: for the face (Mini), for the body (Body), for the face and body (Infinity). The equipment does not require a special room and is easy to carry. A double flash always provides perfect lighting, and a stereo system with two directing beams allows you to choose the exact distance and position of the camera without additional fixation.

Parallel Polarized Light (PPL) Photography
The technique was created for an objective assessment of light reflected from the surface of the skin. Photographs taken with green light emitting diodes (LEDs) can be useful for analyzing diseases such as atopic dermatitis, rosacea, and xerotic dermatitis.

In 2017, Korean scientists successfully used the methodology for quantitative and objective assessment of rosacea under clinical conditions 3. The two main subtypes of rosacea – erythemato-teleangiectatic (ETR) and papulopustular (PPR) were visually and optically determined differently during the study, which allowed accurately differentiate the diagnosis.

Auto Render
Imaging devices (TiVi) allow you to quantify the physical parameters of the skin, which are usually set “by eye” to reduce the subjectivity of skin tests. The method allows you to quantitatively measure erythema, the level of pigment changes.

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