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Updated: Feb 17, 2026
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
Preliminary results of vibro-acoustography evaluation of bone surface and bone fracture
Marcello H Nogueira-Barbosa1, Hermes Arytto Salles Kamimura2, Guilherme Braz2
1Radiology Division, Ribeirão Preto Medical School, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
Background:
Vibro-acoustography (VA) uses two co-focused ultrasound beams with slightly different frequencies. The beams interact and generate a low-frequency focus to excite an object.
Methods:
A two-element confocal ultrasound transducer with central frequency at 3.2 MHz was used to generate the low-frequency excitation (30 kHz) and the response of the bone to that excitation was acquired by a dedicated hydrophone. The face of the confocal transducer was positioned parallel to the surface of the bone at a focal length of 7 cm. The hydrophone was fixed to the side of the transducer, out of the path of the ultrasonic beam.
Results:
The resulting image clearly showed the bone fracture with resolution of 0.25 mm and high contrast with well-defined borders.
Conclusions:
In this paper, we present preliminary results of VA imaging of bone surface and of bone fracture using an experimental set-up. Our results encourage future studies using VA to evaluate bone fractures.
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