Title :
9B-3 Orthogonal Observations of Vibrating Microbubbles
Author :
Vos, H.J. ; Versluis, M. ; de Jong, N.
Abstract :
Phospholipids-coated microbubbles nearby a wall can achieve strong nonspherical oscillations. This proceeding quantifies these oscillations at conditions relevant to clinical ultrasound contrast imaging. The experimental setup consisted of two microscope objectives placed orthogonally, one giving a top- view of a single microbubble floating up to a wall, the second giving a side-view of the very same bubble. The bubble was excited with ultrasound pulses of 2.25 MHz frequency and increasing pressures from 30 to 300 kPa. Images from the two objectives were combined and relayed to the ultrafast-framing Brandaris-128 camera. Analysis of the clips shows nonspherical shapes that are described by the spherical harmonic of the 2deg degree, having oscillation amplitude of the order of the radial oscillations.
Keywords :
acoustic materials; acoustic microscopy; acoustic pulses; biomedical ultrasonics; bubbles; clinical ultrasound contrast imaging; frequency 2.25 MHz; microscope objectives; nonspherical oscillations; orthogonal observation; phospholipids-coated microbubbles; radial oscillations; ultrafast-framing Brandaris-128 camera; ultrasound pulses; Biomedical engineering; Cameras; Cardiology; Optical imaging; Optical microscopy; Physics; Shape; Thorax; Ultrafast optics; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2007.196
