Cart (Loading....) | Create Account
Close category search window
 

Simulation of shadowing effects in ultrasound imaging from computed tomography images

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

6 Author(s)
An Hoai Pham ; Nat. Inst. of Aquatic Resources, Tech. Univ. of Denmark, Charlottenlund, Denmark ; Stage, B. ; Hemmsen, M.C. ; Lundgren, B.
more authors

Simulation of ultrasound (US) images based on computed tomography (CT) data has previously been performed with different approaches. Shadowing effects are normally pronounced in US images, so they should be included in the simulation. In this study, a new method to introduce shadowing effects has been developed which makes the simulated US images appear more realistic. US images of a cod (Gadus morhua) were obtained with a BK Medical 2202 ProFocus US scanner with a dedicated research interface giving access to beamformed RF data. The center frequency of the transmit pulse was 10 MHz. In transmit mode, the focus point was at 45 mm. 384 US focused beams were emitted to create the image. CT images with a slice thickness of 0.5 mm, and a pixel size of 0.2 × 0.2 mm, were obtained with an Aquilion ONE Toshiba CT scanner. CT data were mapped from Hounsfield Units (HU) to backscatter (BST), attenuation (ATT) coefficients, and characteristic acoustic impedance (CAI) with a new mapping method. The new approach uses focused beam tracing to create maps of the transmission coefficient (TRC) and then the scattering strength map (SSM). There were 384 maps of SSM corresponding to 384 emissions. Finally an average SSM map was calculated. Field II was used to simulate an US image with dimensions of 38.9 mm × 55.3 mm × 4.5 mm, using 106 point scatterers. Since no quantitative method to assess quality of a simulated US image compared to a measured one exists, visual inspection was used. The method gives diffuse shadows that are similar to the ones observed in measurements on real objects.

Published in:

Ultrasonics Symposium (IUS), 2011 IEEE International

Date of Conference:

18-21 Oct. 2011

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.