Acoustical Imaging by J.F. Greenleaf, X. Zhang, C. Pislaru (auth.), Iwaki Akiyama

By J.F. Greenleaf, X. Zhang, C. Pislaru (auth.), Iwaki Akiyama (eds.)

The 29th foreign Symposium on Acoustical Imaging was once held in Shonan Village, Kanagawa, Japan, April 15-18, 2007.
This interdisciplinary Symposium has been happening each years for the reason that 1968 and kinds a different discussion board for complicated study, protecting new applied sciences, advancements, tools and theories in all components of acoustics. during the years the volumes within the Acoustical Imaging sequence have built and turn into recognized and favored reference works.
Offering either a wide viewpoint at the state of the art within the box in addition to an in-depth examine its innovative learn, this quantity 29 within the sequence comprises back an outstanding choice of seventy papers awarded in 9 significant categories:

Strain Imaging
Biological and clinical Applications
Acoustic Microscopy
Non-Destructive review and commercial Applications
Components and Systems
Geophysics and Underwater Imaging
Physics and Mathematics
Medical snapshot Analysis
FDTD procedure and different Numerical Simulations

Researchers, business scientists, clinicians, graduate scholars drawn to utilizing acoustics for all features of imaging.

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Furthermore, Tozzi et al. have recently reported a significant length reduction in the investigated common carotid artery on exposed vessel in pigs [5]. The aim is to investigate whether there is a length alteration of the arterial wall also in humans. The objective of this paper was to describe a new non-invasive ultrasonic technique that measures the length alteration of arteries in human in vivo. Furthermore, results from the first in vivo study are presented. 2. MATERIAL & METHODS The longitudinal length alteration of the arterial wall was measured using B-mode ultrasound using a commercial ultrasound system (HDI 5000, Philips Medical Systems, Bothell, WA, USA).

The paper includes examples of in vitro strain images with full details of the acquisition and processing times. Key words: 3D ultrasound, Strain imaging, Elastography, Real-time 1. INTRODUCTION 2D ultrasonic imaging of axial strain is emerging from the laboratory to feature in the latest generation of commercial medical scanners. Strain images are obtained by differentiating displacement maps, calculated by matching a large number of RF data windows in pre- and post-deformation scans. The resulting images allow qualitative assessment of tissue stiffness, which is often a clinically useful indicator of disease.

Treece et al. RF data acquisition and simultaneous control of the probe’s stepper motor were managed by our freely available Stradwin software. The system is capable of RF data acquisition at a rate of approximately 7 volumes per second. The protocol for strain imaging was to record one volume, apply slightly greater probe pressure, then record a second volume, the entire acquisition process taking less than 2 s. 1 GHz CPU was then 17 s for the sphere phantoms (60 frames per volume) and 32 s for the olive phantom (120 frames per volume).

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