SURF imaging: In vivo demonstration of an ultrasound contrast agent detection technique
| Autor: | Oyvind K.-V. Standal, B.A.J. Angelsen, Tonni F. Johansen, Svein-Erik Måsøy, P. Nasholm, Rune Hansen |
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| Rok vydání: | 2008 |
| Předmět: |
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Materials science Acoustics and Ultrasonics Swine media_common.quotation_subject Sulfur Hexafluoride Contrast Media Kidney Optics Image Interpretation Computer-Assisted Medical imaging Animals Contrast (vision) Display contrast Electrical and Electronic Engineering Image sensor Instrumentation Phospholipids Ultrasonography media_common Pulse (signal processing) business.industry Ultrasound Image Enhancement business Algorithms Pulse-width modulation |
| Zdroj: | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 55:1112-1121 |
| ISSN: | 0885-3010 |
| DOI: | 10.1109/tuffc.2008.763 |
| Popis: | A dual-band method for ultrasound contrast agent detection is demonstrated in vivo in an animal experiment using pigs. The method is named Second-order UltRasound Field Imaging, abbreviated SURF Imaging. It relies on simultaneously transmitting two ultrasound pulses with a large separation in frequency. Here, a low-frequency pulse of 0.9 MHz is combined with a high-frequency pulse of 7.5 MHz. The low-frequency pulse is used to manipulate the properties of the contrast agent, and the high- frequency pulse is used for high-resolution contrast detection and imaging. An annular array capable of transmitting the low- and high-frequency pulses simultaneously was constructed and fitted to a mechanically scanned probe used in a GE Vingmed System 5 ultrasound scanner. The scanner was modified and adapted for the dual-band transmit technique. In-house software was written for post-processing of recorded IQ-data. Contrast-processed B-mode images of pig kidneys after bolus injections of 1 mL of Sonovuereg are presented. The images display contrast detection with contrast-to-tissue ratios ranging from 15-40 dB. The results demonstrate the potential of SURF Imaging as an ultrasound contrast detection technique for clinically high ultrasound frequencies. This may allow ultrasound contrast imaging to be available for a wide range of applications. |
| Databáze: | OpenAIRE |
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