Acceso abierto

High-frequency ultrasound in the 21st century

Robert Krzysztof Mlosek
Robert Krzysztof Mlosek
, 
Bartosz Migda
Bartosz Migda
 y 
Michał Migda
Michał Migda
   | 18 dic 2020
Journal of Ultrasonography's Cover Image
Acerca de este artículo
Artículo anterior
Artículo siguiente
Cite
Article Category: research-article
Publicado en línea: 18 dic 2020
Páginas: 233 - 241
Recibido: 27 sept 2020
Aceptado: 07 oct 2020
DOI: https://doi.org/10.15557/jou.2020.0042
Palabras clave
© 2021 Polish Ultrasound Society. Published by Medical Communications Sp. z o.o.
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1.

Comparison of resolution between classic scanner (Epiq5) A. and a high-frequency scanner (DermaMed) B. based on an example of a granuloma. More details can be seen in the B image due to the use of a 48 MHz transducer
Comparison of resolution between classic scanner (Epiq5) A. and a high-frequency scanner (DermaMed) B. based on an example of a granuloma. More details can be seen in the B image due to the use of a 48 MHz transducer

Fig. 2.

Ultrasound image of healthy skin: A. Classic ultrasonography, Philips Epiq5 with a linear 5–18 MHz transducer. B. High-frequency DermaMed ultrasound, 48 MHz transducer. C. Hair follicles, DermaMed. D. Sweat glands – forehead, DermaMed
Ultrasound image of healthy skin: A. Classic ultrasonography, Philips Epiq5 with a linear 5–18 MHz transducer. B. High-frequency DermaMed ultrasound, 48 MHz transducer. C. Hair follicles, DermaMed. D. Sweat glands – forehead, DermaMed

Fig. 3.

An anechoic subepidermal band (SLEB/SENEB) in an ultrasound image of healthy skin. A. The skin of the forehead, Episcan, 50 MHz transducer. B. The skin of the hands, DermaMed, 48 MHz transducer
An anechoic subepidermal band (SLEB/SENEB) in an ultrasound image of healthy skin. A. The skin of the forehead, Episcan, 50 MHz transducer. B. The skin of the hands, DermaMed, 48 MHz transducer

Fig. 4.

SLEB thickness measurement. A. Manual measurement. B. Automatic measurement with the use of software available in the ultrasound (DermaMed)
SLEB thickness measurement. A. Manual measurement. B. Automatic measurement with the use of software available in the ultrasound (DermaMed)

Fig. 5.

Sonoelastography of healthy skin. IA. The cheek, a grayscale image. IB. The cheek, sonoelastography. IIA. The thigh, a grayscale image. IIB. The thigh, sonoelastography. The subcutaneous tissue is more compliant to strain than the dermis
Sonoelastography of healthy skin. IA. The cheek, a grayscale image. IB. The cheek, sonoelastography. IIA. The thigh, a grayscale image. IIB. The thigh, sonoelastography. The subcutaneous tissue is more compliant to strain than the dermis

Fig. 6.

Ultrasound image of atopic dermatitis (Episcan, 50 MHz transducer). A. Active lesion. B. The boundary between the lesion and the surrounding healthy tissue
Ultrasound image of atopic dermatitis (Episcan, 50 MHz transducer). A. Active lesion. B. The boundary between the lesion and the surrounding healthy tissue

Fig. 7.

Monitoring of the course of small vessels. A. Classical scanner (Epiq5), a venous vessel coursing at the border between the dermis and the subcutaneous tissue. B. High-frequency 48 MHz scanner (DermaMed), a vessel running under the dermis and descending into the subcutaneous tissue
Monitoring of the course of small vessels. A. Classical scanner (Epiq5), a venous vessel coursing at the border between the dermis and the subcutaneous tissue. B. High-frequency 48 MHz scanner (DermaMed), a vessel running under the dermis and descending into the subcutaneous tissue

Varying ultrasound penetration depth depending on the frequency used

No. Frequency [MHz] Penetration depth [mm] Structures that can be visualized
1 7.5 >40 Deep structures, lymph nodes
2 10 35 The epidermis, dermis, subcutaneous tissue
3 20 10 Epidermis and dermis - a fragment of the subcutaneous tissue
4 50 3–4 Epidermis and dermis
5 75 3 The epidermis and a fragment of the dermis
6 100 1,5 Epidermis only

Characteristics of high-frequency ultrasound scanners

Parameter Episcan 1–200 (Longport) DermaScan C (Cortex Technology) DUB-USB Skin Scanner (Taberna Pro Medicum) DermaMed (Draminski)
Analog-to-digital converter 200 MHz, 8-bit (256 levels) No data 100 MHz, 8-bit (256 levels) 96 MHz, 8 bit (256 levels)
Penetration depth [mm] 3.8–22.4 10–20 (depending on the transducer) 15–3 (depending on the transducer) 4–20
Axial resolution [μm] Up to 40 60 Up to 21 at 75 MHz 15
Lateral resolution [μm] – 130 – 50
Frequency [MHz] 20, 50 20 18, 22, 33, 50, 75 35 (Pulse Frequency 48 MHz)
Lateral scan length [mm] 15 – 12,8 15 mm focal length (scanning angle 30°)
Scanning speed [images/s] 1 8 2.5 8
Imaging modes A-scan, B-scan A-scan, B-scan A-scan, B-scan B-scan
Computer connection Permanently connected, a built-in computer Permanently connected, a built-in computer A separate device connected to a computer via USB 2.0 or 3.0 A miniature, handheld device with a built-in USB port connected to a laptop
eISSN:
2451-070X
Idioma:
Inglés
Calendario de la edición:
4 veces al año
Temas de la revista:
Medicine, Basic Medical Science, other
RSS Feed de revista