Stress field forming of sector array transducers for vibro-acoustography

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

Chalek

Kinnick

et al. 2011

Self Cite

Vibro-acoustography is an ultrasound-based imaging modality that uses two ultrasound beams of slightly different frequencies to produce images based on the acoustic response due to harmonic ultrasound radiation force excitation at the difference frequency between the two ultrasound frequencies. Vibro-acoustography has demonstrated feasibility and usefulness in imaging of breast and prostate tissue. However, previous studies have been performed either in controlled water tank settings or a prototype breast scanner equipped with a water tank. In order to make vibro-acoustography more accessible and relevant to clinical use, we report here on the implementation of vibro-acoustography on a General Electric Vivid 7 ultrasound scanner. In this paper, we will describe software and hardware modifications that were performed to make vibro-acoustography functional on this system. We will discuss aperture definition for the two ultrasound beams and beamforming using a linear array transducer. Experimental results from beam measurements and phantom imaging studies will be shown. The implementation of vibro-acoustography provides a step towards clinical translation of this imaging modality for applications in various organs including breast, prostate, thyroid, kidney, and liver.

Section: Introductionmentioning

confidence: 99%

Implementation of vibro-acoustography on a clinical ultrasound system

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

Chalek

Kinnick

et al. 2011

Self Cite

“…Lastly, vibro-acoustography has used multiple focusing methodologies based on different transducer array types (sector, linear, 1.75D, reconfigurable) [23, 93, 94, 95, 96, 97, 98]. The aperture used for excitation can be moved along the transducer width for varying the spatial location of the ARF application.…”

Section: Measurement Of Mechanical Propertiesmentioning

confidence: 99%

Production of acoustic radiation force using ultrasound: methods and applications

Expert Review of Medical Devices

2018

Introduction: Acoustic radiation force (ARF) is used in many biomedical applications. The transfer of momentum in acoustic waves can be used in a multitude of ways to perturb tissue and manipulate cells. Areas Covered: This review will briefly cover the acoustic theory related to ARF, particularly that related to application in tissues. The use of ARF in measurement of mechanical properties will be treated in detail with emphasis on the spatial and temporal modulation of the ARF. Additional topics covered will be the manipulation of particles with ARF, correction of phase aberration with ARF, modulation of cellular behavior with ARF, and bioeffects related to ARF use. Expert Commentary: The use of ARF can be tailored to specific applications for measurements of mechanical properties or correction of focusing for ultrasound beams. Additionally, noncontact manipulation of particles and cells with ARF enables a wide array of applications for tissue engineering and biosensing.

“…In this analysis, the authors investigated the field at Δ f produced in the interaction region of the ultrasound beams and along the propagation path. Other types of transducers such as sector and linear arrays were explored for optimization of resolution and contrast as well as to move vibro-acoustography closer to clinical use with linear array transducers [80, 81, 83]. …”

Section: Vibro-acoustography Beamformingmentioning

confidence: 99%

A Review of Vibro-acoustography and its Applications in Medicine

Alizad²,

Aquino

et al. 2011

CMIR

In recent years, several new techniques based on the radiation force of ultrasound have been developed. Vibro-acoustography is a speckle-free ultrasound based imaging modality that can visualize normal and abnormal soft tissue through mapping the acoustic response of the object to a harmonic radiation force induced by ultrasound. In vibro-acoustography, the ultrasound energy is converted from high ultrasound frequencies to a low acoustic frequency (acoustic emission) that is often two orders of magnitude smaller than the ultrasound frequency. The acoustic emission is normally detected by a hydrophone. In medical imaging, vibroacoustography has been tested on breast, prostate, arteries, liver, and thyroid. These studies have shown that vibro-acoustic data can be used for quantitative evaluation of elastic properties. This paper presents an overview of vibro-acoustography and its applications in the areas of biomedicine.