Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Previously, we have investigated techniques for measuring temperature-dependent change in backscattered energy (CBE) in 1D
 

Summary: Abstract
Previously, we have investigated techniques for measuring
temperature-dependent change in backscattered energy (CBE) in 1D
ultrasonic signals. Extension of those techniques to 2D images is
limited by apparent non-rigid motion of tissue as temperature
changes. Our recent experimental data comes from a Terason 2000
laptop-based ultrasound system equipped with a 7MHz linear array
probe, model 10L5. Typical image sets cover 37 to 50oC with 0.5oC
steps. After compensation for apparent movement, image data was
squared and averaged to form backscattered energy at each pixel.
The tissue appeared to move between 0.5 and 1 mm laterally and
axially. This movement was estimated by maximizing the cross-
correlation of image regions at adjacent temperatures. Two
measures were computed to characterize the CBE over an image
region, the standard deviation over the whole region and the means
of all positive- and all negative-going pixels in the region. These
results are consistent with theoretical expectations and continue to
support the possibility of using CBE in ultrasound as a tool for
noninvasive thermometry. (Supported by NIH grant R21-CA90531
from the National Cancer Institute and the Wilkinson Trust at

  

Source: Arthur, R. Martin - Department of Electrical and Systems Engineering, Washington University in St. Louis

 

Collections: Biology and Medicine; Engineering