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Investigation Of Physical, Chemical And Cosmetological Phenomena Exerting An Impact On The Horny Layer With 50 MHz Sonography

Kaspar, K. (Department of Dermatology of the Ruhr-University, Germany)
el Gammal, S. (Department of Dermatology of the Ruhr-University, Germany)
Altmeyer, P. (Department of Dermatology of the Ruhr-University, Germany)
Vogt, M. (Institute for High Frequency Engineering of the Ruhr-University, Germany)
Ermert, H. (Institute for High Frequency Engineering of the Ruhr-University, Germany)

Contact Person: Katharina Kaspar (katharina.kaspar@ruhr-uni-bochum.de)


Abstract

The objective of this study is to objectify the interpretation of sonograms from patients with various skin conditions by investing the impact of a number of external phenomena on the horny layer. The study population consisted of 26 persons (20 men, 6 women). Ultrasonographic measurements were made on the finger pads with a 50 MHz unit (PVDF Transducer; mean frequency 53 MHz, bandwidth 55 , axial resolution 11Ám, lateral resolution 54 Ám). Following measurement of the reference values, the finger pads of the test subjects were subjected to the following phenomena: cooling, heating, stimulation of sweat production, swelling of the skin, application of acetone, application of adhesives and adhesive strips, stripping and sanding. It was observed that echogenicity increased after cooling and drying, e.g. after exposure to acetone. During the investigation of various adhesives, moreover, it was possible to visualize the dissolution of water-soluble substances directly during the sonographic examination. The precise analysis of the echogenicity of sonograms made with uniform initial settings constitutes the basis for an objective assessment of skin conditions. External phenomena and skin pathology may impair the imaging of structures near the skin surface. The penetration of the epidermis by the sound waves can be improved, however, by selective treatment of the skin surface. This can be of great value when performing ultrasonographic examinations to obtain information on certain questions.

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Poster Number PAkaspar0549
Keywords: Sonography, Extern Influence, Horny Layer, High Frequency, in vivo


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Kaspar, K.; el Gammal, S.; Altmeyer, P.; Vogt, M.; Ermert, H.; (1998). Investigation Of Physical, Chemical And Cosmetological Phenomena Exerting An Impact On The Horny Layer With 50 MHz Sonography. Presented at INABIS '98 - 5th Internet World Congress on Biomedical Sciences at McMaster University, Canada, Dec 7-16th. Available at URL http://www.mcmaster.ca/inabis98/newtech/kaspar0549/index.html
© 1998 Author(s) Hold Copyright