نتایج جستجو برای: elastic scattering spectroscopy
تعداد نتایج: 338154 فیلتر نتایج به سال:
Experiments investigating the local viscoelastic properties of a simple uncross-linked flexible polymer are performed on polyethylene oxide solutions in the semidilute regime using polystyrene beads of varying sizes and surface chemistry as probes. We measure the thermal motions of the beads to obtain the elastic and viscous moduli of our sample. Two different dynamic light scattering technique...
We present a method for selective detection of size-dependent scattering characteristics of epithelial cells in vivo based on polarized illumination and polarization sensitive detection of scattered light. We illustrate the method using phantoms designed to simulate squamous epithelial tissue and progressing to epithelial tissue in vitro and in vivo. Elastic light scattering spectroscopy with p...
We report a pilot study designed to test elastic light-scattering (ELS) spectroscopy for characterizing normal, tumor, and tumor-infiltrated brain tissues. ELS spectra were measured from 393 sites on 36 ex vivo tissue specimen obtained from 29 patients. We employed and compared the performances of three methods of spectral classification for tissue characterization, including spectral slope ana...
Optical spectroscopy systems have been involved in various clinical fields; however the main interest is still in the diagnosis of premalignant/malignant lesions. The aim of this study was to compare findings of Elastic Scattering Spectroscopy (ESS) with histopathology of oral tissues to see if this technique could be used as an adjunct or alternative to histopathology in identifying dysplasia....
Optical measurements of the cervical transformation zone (sometimes referred t o as the transition zone) using elastic-scattering spectroscopy, demonstrate sensitivity t o the epithelial cell-type differences. keywords: optical biopsy, tissue spectroscopy, elastic scattering, noninvasive diagnostics INTRODUCTION AND BACKGROUND The transformation zone of the cervix, near the external os, designa...
We review the status of the proton charge radius puzzle. Emphasis is given to the various experiments initiated to resolve the conflict between the muonic hydrogen results and the results from scattering and regular hydrogen spectroscopy. 1 The proton charge radius puzzle The historical route to the proton charge radius (rp) is from elastic electron-proton scattering. In a completely complement...
We aim to investigate the mechanism of acetowhitening upon which the colposcopic diagnosis of cervical cancer is based. The changes in light scattering induced by acetic acid in intact cervical cancer cells and cellular components were studied using elastic light-scattering spectroscopy. After adding acetic acid to intact cancer cell culture samples (cell suspensions and attached monolayer cell...
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