By a News Reporter-Staff News Editor at Biotech Week -- Research findings on Angiography are discussed in a new report. According to news originating from Taoyuan, Taiwan, by NewsRx correspondents, research stated, "Focused ultrasound (FUS) is a recently discovered noninvasive technique for local and temporal enhancement of vascular permeability, which facilitates drug delivery from the vessels into the surrounding tissue. However, exposure to FUS at a high intensity may cause permanent damage."
Our news journalists obtained a quote from the research from Chang Gung University, "To investigate the effects of the FUS treatment on blood vessels, we propose to use fluorescein angiography (FA) and optical coherence tomography (OCT) for real-time observation of the diffusion of fluorescence dye from blood vessels and to evaluate the morphological changes of the vessels in vivo. With time-resolved FA imaging, the relationship between the exposed power and the improved permeability of the vessels can be assessed according to the enhancement of the fluorescent intensity due to the dye leakage. Furthermore, the variation of the time-resolved fluorescent intensities can be used to identify the occurrence of dye leakage. In contrast, OCT can be implemented for the reconstruction of tissue microstructures. To quantitatively evaluate the morphological changes of the vessels after the FUS exposure with OCT, a new algorithm was proposed to estimate the vessel area based on the comparison of backscattering properties resulting from the tissue and vascular structures. Results showed that the vessel area increased as the exposed power increased, and the area became significantly larger at a higher FUS exposure power of 10 W."
According to the news editors, the research concluded: "Integrated FA and OCT observation can be potentially effective for monitoring the outcome and investigating the effects of FUS treatment."
For more information on this research see: Quantitative observation of focused-ultrasound-induced vascular leakage and deformation via fluorescein angiography and optical coherence tomography. Journal of Biomedical Optics, 2013;18(10):101307 (see also Angiography).
The news correspondents report that additional information may be obtained from M.T. Tsai, Dept. of Electrical Engineering, Chang Gung University, 259 Wen-Hwa 1st Road, Kwei-Shan, Taoyuan 33302, Taiwan. Additional authors for this research include C.K. Lee, K.M. Lin, Y.X. Lin, T.H. Lin, T.C. Chang, J.D. Lee and H.L Liu.
Keywords for this news article include: Asia, Drugs, Taiwan, Taoyuan, Therapy, Treatment, Cardiology, Angiography, Fluoresceins, Hydrocarbons, Contrast Media, Topical Agents, Spiro Compounds, Imaging Technology, Ophthalmic Preparations, Ophthalmic Diagnostic Agents, Optical Coherence Tomography.
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