Skin examination by high-frequency ultrasound
Authors:
V. Resl 1; M. Leba 1; I. Rampl 2; J. Říčař 1
Authors place of work:
Dermatovenerologická klinika LFUK a FN Plzeň
Vedoucí: prof. MUDr. Karel Pizinger, CSc.
1; Fakulta elektroniky a komunikačních technologií Vysokého učení technického v Brně a Enjoy spol. s r. o.
Vedoucí: Doc. Ing. Ivan Rampl, CSc.
2
Published in the journal:
Prakt. Lék. 2008; 88(1): 6-13
Category:
Reviews
Summary
The introduction of high frequency ultrasound scanners has made it possible for non-invasive technology to be used in dermatology. It is possible to create an image of the skin’s structure by means of ultrasonic waves and computer technology, which is of use in research, diagnostics and follow-up examinations of therapeutic procedures. The sensitivity and scope of this method’s possibilities depend firstly on the physical quality of the ultrasound waves and then on the technique used (especially scanners) and then on the characteristics and composition of the skin under observation, which significantly influences the spread of acoustic signal within the tissue. The more MHz the probe has, the more detailed the image we derive, but we gain lower depth. In dermatology the most commonly used probes have a frequency of 20 MHz. This technique gained ground in investigation of oedemas and in wound healing, determining skin thickness, psoriasis therapy, scleroderma, and panniculitis. This application is important in melanomas and squamous-cell carcinomas. The differentiation of some structures such as nevi, sebaceous glands or hair follicles in difficult. A lot depends on the lateral and axial resolution of the device, so 50–100 MHz probes are used to study epidermal structures, sebaceous glands etc. Our device (50 MHz) is mostly used in studying the electromagnetic and light field influence on skin as part of a wider research project.
Key words:
high frequency ultrasound, diagnostics, ultrasound use in dermatology.
Zdroje
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