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Title: Acoustical properties of 3D printed thermoplastics
Authors: Antoniou, Anastasia 
Evripidou, Nikolas 
Giannakou, Marinos 
Constantinides, Georgios 
Damianou, Christakis A. 
Major Field of Science: Engineering and Technology
Field Category: Materials Engineering
Keywords: Focused ultrasound;Skull phantoms;Acoustic impedance;Bone;Phantoms;Reinforced plastics;Thermoplastics
Issue Date: 1-Apr-2021
Source: Journal of the Acoustical Society of America, 2021, vol. 149, no. 4, pp. 2854 - 2864
Volume: 149
Issue: 4
Start page: 2854
End page: 2864
Journal: Journal of the Acoustical Society of America 
Abstract: With focused ultrasound (FUS) gaining popularity as a therapeutic modality for brain diseases, the need for skull phantoms that are suitable for evaluating FUS protocols is increasing. In the current study, the acoustical properties of several three-dimensional (3D) printed thermoplastic samples were evaluated to assess their suitability to mimic human skull and bone accurately. Samples were 3D printed using eight commercially available thermoplastic materials. The acoustic properties of the printed samples, including attenuation coefficient, speed of sound, and acoustic impedance, were investigated using transmission-through and pulse-echo techniques. The ultrasonic attenuation, estimated at a frequency of 1.1 MHz, varied from approximately 7 to 32 dB/cm. The frequency dependence of attenuation was described by a power law in the frequency range of 0.2-3.5 MHz, and the exponential index of frequency was found to vary from 1.30 to 2.24. The longitudinal velocity of 2.7 MHz sound waves was in the range of 1700-3050 m/s. The results demonstrate that thermoplastics could potentially be used for the 3D construction of high-quality skull phantoms.
ISSN: 1520-8524
DOI: 10.1121/10.0004772
Rights: © 2021 Acoustical Society of America.
Attribution-NonCommercial-NoDerivatives 4.0 International
Type: Article
Affiliation : Cyprus University of Technology 
Medsonic Ltd 
Appears in Collections:Άρθρα/Articles

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