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High frequency (20 MHz) ultrasonic devices: advantages and applications
M Berson1, J M Grégoire, F Gens
1Unité INSERM 316, Faculté de Médecine, 2 bis boulevard Tonnellé, 37032, Tours, France. berson@univ-tours.fr
Summary
This study explores 20 MHz ultrasonic devices, finding they offer practical advantages for routine use in medical imaging despite limited resolution. These devices facilitate applications in dermatology, ophthalmology, and stomatology.
Area of Science:
- Medical Imaging
- Ultrasound Technology
Background:
- High-frequency ultrasound probes offer potential for detailed medical imaging.
- Challenges exist in probe handling and maintaining performance for routine clinical use.
Purpose of the Study:
- To investigate the problems, advantages, and potential applications of 20 MHz ultrasonic devices.
- To assess the feasibility of using a membrane with 20 MHz probes for enhanced usability.
Main Methods:
- Utilized 20 MHz ultrasonic probes with aqueous gel and a protective membrane.
- Evaluated probe performance in terms of resolution and sensitivity with and without the membrane.
- Applied linear scanning and duplex probe configurations for various applications.
Main Results:
- A membrane-enclosed 20 MHz probe maintained resolution and sensitivity, facilitating routine use.
- Demonstrated applications in dermatology, ophthalmology (anterior eye chamber, corneal grafts), and stomatology (periodontal disease).
- Measured very low velocities (<0.50 mm/s) in small vessels (100-300 micrometers) using a duplex probe and cross-correlation method.
Conclusions:
- While 20 MHz frequency impacts resolution, it enables the development of user-friendly ultrasonic probes.
- The findings support the utility of 20 MHz ultrasound for specific clinical applications requiring ease of handling.