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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Graf, I.M. Litovsky, S. Emelianov, S. |
| Copyright Year | 2011 |
| Description | Author affiliation: Dept. of Pathology, Univ. of Alabama at Birmingham, Birmingham, AL, USA (Litovsky, S.) || Dept. of Biomed. Eng., Univ. of Texas at Austin, Austin, TX, USA (Graf, I.M.; Emelianov, S.) |
| Abstract | Background: The complex nature of atherosclerosis requires the assessment of various arterial properties to accurately diagnose the severity of the disease. The aim of this study is to develop and test a noninvasive vascular imaging method combining ultrasound, and spectroscopic photoacoustic (PA) imaging to diagnose superficial arteries. Methods: The experiments were performed using excised human atherosclerosclerotic arteries. The sample was positioned in a water tank filled with saline and flushed with blood at a pulsatile flow (2 Hz, 50 cm/s). The artery was scanned using a 40MHz linear array transducer surrounded by 2 optical fibers and Vevo 2100 ultrasound system. Ultrasound 3-D data sets were formed from 256 echo lines and 150 frames. The 3-D PA images were acquired at 1210-1230 nm wavelengths. A multi-wavelength spectroscopic PA algorithm based on linear minimum mean squared error estimation and optical absorption spectra was used to distinguish lipids from surrounding tissue and blood. Results: Ultrasound images revealed arterial morphology, which guided tissue segmentation, such as lumen-intima interface. The spectroscopic PA image overlapping the ultrasound image showed the location of lipids (marked by yellow color in Fig. 1C-D). Using 3-D spectroscopic PA data the volume of the lipid pool were directly derived. The spectroscopic PA imaging results were confirmed by Oil Red O histology staining. Discussion and Conclusions: The results of our study demonstrate that the proposed method is feasible, and integrated 3-D ultrasound, and spectroscopic PA imaging provides localized and global detailed characterization of arterial morphology, and composition. |
| Sponsorship | IEEE Ultrasonics, Ferroelectrics Frequency Control Soc. |
| Starting Page | 292 |
| Ending Page | 295 |
| File Size | 1192712 |
| Page Count | 4 |
| File Format | |
| ISBN | 9781457712531 |
| ISSN | 19485727 |
| e-ISBN | 9781457712524 |
| DOI | 10.1109/ULTSYM.2011.0070 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-10-18 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Ultrasonic imaging Arteries Lipidomics Atherosclerosis Humans Optical imaging photoacoustics non-invasive vascular imaging ultrasound |
| Content Type | Text |
| Resource Type | Article |
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