Preliminary results of vibro-acoustography evaluation of bone surface and bone fracture

Author(s)

Nogueira-Barbosa, Marcello H. ^[1] ; Salles Kamimura, Hermes Arytto ^[2] ; Braz, Guilherme ^[2] ; Agnollitto, Paulo M. ^[1] ; Oliveira Carneiro, Antonio Adilton ^[2]

Affiliation

^[1] Univ Sao Paulo, Ribeirao Preto Med Sch, Radiol Div, Ribeirao Preto, SP - Brazil

^[2] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Phys Dept, Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: QUANTITATIVE IMAGING IN MEDICINE AND SURGERY; v. 7, n. 5, p. 549-554, OCT 2017.
• Web of Science Citations: 3

Abstract

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. (AU)

• FAPESP's process: 11/10809-6 - Sonothrombolysis by focused and modulated acoustic radiation force using double beam
• Grantee: Hermes Arytto Salles Kamimura
• Support Opportunities: Scholarships in Brazil - Doctorate