Novel scanning method for distortion-free BOTDA measurements

Novel scanning method for distortion-free BOTDA measurements.

Systematic errors induced by distortions in the pump pulse of conventional Brillouin distributed fiber sensors are thoroughly investigated. Experimental results, supported by a theoretical analysis, demonstrate that the two probe sidebands in standard Brillouin optical time-domain analyzers provide a non-zero net gain on the pump pulse, inducing severe distortions of the pump when scanning the ...

Fast image scanning method in liquid-AFM without image distortion.

High speed imaging by atomic force microscopy (AFM) allows one to directly observe the dynamic behavior of a sample surface immersed in liquid media; thus, it has been considered to be an indispensable tool for nanobiotechnology and is used in many research fields, including molecular biology and surface science. For real-time observation of a certain behavior, the high speed imaging technique ...

Distortion-free freehand-scanning OCT implemented with real-time scanning speed variance correction

Hand-held OCT systems that offer physicians greater freedom to access imaging sites of interest could be useful for many clinical applications. In this study, by incorporating the theoretical speckle model into the decorrelation function, we have explicitly correlated the crosscorrelation coefficient to the lateral displacement between adjacent A-scans. We used this model to develop and study a...

A Novel Method for Measuring, Regardless of Image Distortion and Lens Varying Specifications in Endoscopic Treatment of Vesicoureteral Reflux

A Novel Method for Detection of Architectural Distortion in Mammogram

-Among various breast abnormalities architectural distortion is the most difficult type of tumor to detect. When area of interest is medical image data, the major concern is to develop methodologies which are faster in computation and relatively noise free in processing. This paper is an extension of our own work where we propose a hybrid methodology that combines a Gabor filtration with direct...