Title :
Measurements comparing the linearly propagated field using an effective apodization and the nonlinearly generated second harmonic field
Author :
Wallace, Kirk D. ; Fedewa, Russell J. ; Holland, Mark R. ; Ng, Gary C. ; Robinson, Brent S. ; Jago, James R. ; Rielly, Matthew ; Miller, James G.
Author_Institution :
Dept. of Phys., Washington Univ., St. Louis, MO, USA
Abstract :
We have previously introduced the concept of an "effective apodization" as a linear description of the nonlinearly generated harmonic components of a finite amplitude ultrasonic field. The objective of the present work is to examine the seemingly unlikely possibility that an approach based solely on the linear back-propagation of measured data from the focal plane can accurately describe the nonlinearly generated field over a very wide range of depths.
Keywords :
biomedical optical imaging; biomedical ultrasonics; harmonic generation; phantoms; ultrasonic imaging; ultrasonic propagation; effective apodization; finite amplitude ultrasonic field; linear back propagation; linearly propagated field; nonlinearly generated second harmonic field; Apertures; Diffraction; Frequency measurement; Imaging phantoms; Kirk field collapse effect; Physics; Position measurement; Shape measurement; Ultrasonic imaging; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics, 2003 IEEE Symposium on
Print_ISBN :
0-7803-7922-5
DOI :
10.1109/ULTSYM.2003.1293442
