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Group velocity dispersion effects with water and lipid in 1.3 microm optical coherence tomography system


, : Group velocity dispersion effects with water and lipid in 1.3 microm optical coherence tomography system. Physics in Medicine and Biology 49(6): 923-930

Optical coherence tomography (OCT) has been introduced for the diagnosis of vulnerable plaques in the coronary arteries. When an OCT system images through tissue and biological liquids, group velocity dispersion (GVD) will occur, which may be useful in tissue characterization. This study compares the water and lipid induced GVD effects, important constituents in plaque, on the axial resolution. The point-spread function (PSF) was measured when a target mirror was immersed in either water or lipid. A Fourier transform was performed on the PSF data. No significant GVD was observed in oil up to 15 mm thickness. Water depths greater than 6 mm significantly broadened the PSF. This indicates that the distortion of the spectrum can be attributed to the GVD in water. These results suggest that when imaging through tissue (such as when performing intravascular imaging in vivo) one may be able to distinguish different tissue types for diagnostic purposes.

US$29.90

PMID: 15104316


Other references

Blum, H.; Schnall, M.D.; Renshaw, P.F.; Buzby, G.P., 1988: Metabolic and ionic changes in muscle during hemorrhagic shock. We have employed concurrent noninvasive 31P and 23Na NMR spectroscopy in conjunction with the paramagnetic shift reagent dysprosium triethylenetetramine hexaacetic acid to observe the intracellular sodium and phosphorus signals in rat leg muscle....

McLaughlin, L.W.; Romaniuk, E., 1982: The use of high-performance liquid chromatography in the isolation and analysis of oligoribonucleotides synthesized by the T4 RNA ligase reaction. Analytical Biochemistry 124(1): 37-44

Baechler, R.H.; Alpen, R.M., 1964: Extraction of borings removed from fender piles in San Francisco-Oakland Bay bridge. After 25 years, 11% of the Douglas Fir piles showed some marine-borer attack. Borings from sound piles in 1962 usually showed more creosote than those from borer-damaged piles. Analysis of samples of the creosotes originally used showed them to be...

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Santa, M., 1976: Influence of irrigation regime on yield and water economy of lucerne. In field trials on medium heavy soils at Novy Trh, Slovakia in 1966-71, irrigation of lucerne cv. Nitrianka with 40 cm of water was more cost-effective than use of higher rates and gave an av. annual yield (1966-8) of 51.4 t hay/ha, compared with...