NDLI: Imaging contrast agent and tissue at higher harmonics

Content Provider	IEEE Xplore Digital Library
Author	Bouakaz, A. Krenning, B. Vletter, W. ten Cate, F. de Jong, N.
Copyright Year	2002
Description	Author affiliation: Dept. of Cardiology, Erasmus Univ., Rotterdam, Netherlands (Bouakaz, A.; Krenning, B.)
Abstract	A major step is realized in ultrasound imaging with the introduction of 2nd harmonic (2H) technology. 2H showed significant enhancement in image quality when used in native mode. When combined with contrast agent (CA), 2H increased the discrimination between perfused and non-perfused tissue, usually termed contrast to tissue ratio (CTR). This improvement is due to the strong nonlinear scattering exhibited by byca compared to tissue. We demonstrate in this study that for tissue and CA imaging, substantial advantages can be achieved over 2H if imaging is performed at higher harmonic frequencies, termed here SuperHarmonic (SH). The SH is a single nonlinear component created from a combination of frequencies ranging from the 3H up to 5H. A special a wide frequency band array transducer was developed specifically for SH imaging. The array was connected to a Vivid5 system. In vitro and patient studies were carried out for contrast SH imaging and for tissue SH imaging. The results showed that for specific scanning settings higher harmonics proved to be generated in a sufficient amount. They increase CTR and improve the image quality further compared to 2H alone.
Sponsorship	Ultransonics Ferroelectr., & Frequency Control Soc
Starting Page	1981
Ending Page	1984
File Size	270513
Page Count	4
File Format	PDF
ISBN	0780375823
ISSN	10510117
DOI	10.1109/ULTSYM.2002.1192689
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-08
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Frequency Power harmonic filters Image quality Cardiology Acoustic imaging Scattering Focusing Acoustic transducers Band pass filters
Content Type	Text
Resource Type	Article

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