Ultrasound image of the skin, apparatus and imaging basics

Abstract

Ultrasound imaging of the skin is becoming more and more popular. Skin ultrasound examinations are used both in order to assess healthy skin and to evaluate pathological lesions. They are mainly performed in dermatology as well as in broadly understood aesthetic medicine and cosmetology. At present, skin imaging is enabled by high-frequency equipment and high-quality conventional devices. The introduction of high-frequency electronic transducers which are supported by conventional scanners may be a turning point in skin ultrasound equipment. Irrespective of the ultrasound scanner, three layers may be distinguished in the image of the healthy skin: epidermal echo, dermis and subcutaneous tissue. High-frequency equipment allows for detailed imaging of the epidermal echo, dermis and upper part of the subcutaneous tissue. It is also possible to visualize the skin appendages (hair with follicles and nails) as well as slight vessels that run in the dermis and upper subcutaneous tissue. Contrary to high-frequency equipment, conventional scanners do not allow for a detailed assessment of the epidermal and dermal echoes. Instead, they enable the visualization of the entire subcutaneous tissue. The following parameters are used for the assessment of skin ultrasound images: thickness of individual skin layers, caliber of blood vessels, echogenicity of the dermis or its individual layers, echogenicity of the subcutaneous tissue as well as the presence or absence of flow in slight venous vessels. Currently, the studies on the usage of sonoelastography for skin assessment are in progress. Considering the dynamic development of skin imaging equipment and its diagnostic possibilities, one might suspect that high-frequency examinations will become more common and will be fundamental for the evaluation of both healthy and pathologically altered skin. This paper is an introduction to a series of articles on the clinical application of high-frequency ultrasound. The next articles will be published in the subsequent issues.

Reactivating the extracellular matrix synthesis of sulfated glycosaminoglycans and proteoglycans to improve the human skin aspect and its mechanical properties

“…Skin ultrasound examinations are often used in the medical field to evaluate healthy and pathologically altered skin 29. In the current study, we used this technique to monitor the change that takes place in an aged skin and especially in the dermis following the de novo synthesis of sGAGs (Figure 4B).…”

Skin melanoma imaging using ultrasonography: a literature review

“…First attempts at using USG for skin imaging were made by Alexander and Miller over 40 years ago, using a 15 MHz head [ 14 ]. Since that time, a considerable technological advancement has taken place, which enabled an increase in head frequencies, which lead to an increase in the obtained image resolution [ 15 ]. This makes it possible to do diagnostic tests of the entire change in real time, without violation of the skin integrity and obtaining clear images, and even evaluation of the skin blood flow.…”

Validity and reliability of a structured‐light 3D scanner and an ultrasound imaging system for measurements of facial skin thickness

“…Three-dimensional -scanning-based morphological studies of the face are now common, including the diagnosis of genetic diseases, orthodontic treatment, and surgical evaluations before and after maxillofacial surgery (Hammond et al, 2004). The general thickness measurements of facial skin has been reported from biopsies (Lee and Hwang, 2002;Ha et al, 2005;Hwang et al, 2006;Chopra et al, 2015) and US imaging systems (Pellacani and Seidenari, 1999;Mlosek and Malinowska, 2013;Vyas et al, 2015). However, previous studies have paid little attention to region-related variations of the facial skin using 3 D scanning systems based on anatomic dissections.…”