Volumetric tumor delineation and assessment of its early response to radiotherapy with optical coherence tomography.

Texture analyses of optical coherence tomography (OCT) images have shown initial promise for differentiation of normal and tumor tissues. This work develops a fully automatic volumetric tumor delineation technique employing quantitative OCT image speckle analysis based on Gamma distribution fits. We test its performance using immunodeficient mice with dorsal skin window chambers and subcutaneously grown tumor models.

[The efficacy of ethylmethylhydroxypyridine in the rehabilitation treatment of poststroke patients].

The analysis of the clinical efficacy and safety of ethylmethylhydroxypyridine succinate (mexidol) in the complex of rehabilitation measures in patients after ischemic stroke (IS) shows that course treatment with mexidol improves the recovery of neurological functions, decreases neurological deficit, cognitive disorders, including memory impairment, and manifestations of asthenic syndrome, increases the level of social adaptation and improves the psycho-emotional state of patients, reduces spasticity, increases motor and speech activity, praxis, reliably eliminates the ignoring syndrome. There is a decrease in the level of total cholesterol and low-density b-lipoproteins in the blood, and decrease in the severity of hypercoagulation. The results of the studies have convincingly shown the efficacy of mexidol at all stages of rehabilitation treatment of patients with IS.

Analysis of low-scattering regions in optical coherence tomography: applications to neurography and lymphangiography.

Analysis of semi-transparent low scattering biological structures in optical coherence tomography (OCT) has been actively pursued in the context of lymphatic imaging, with most approaches relying on the relative absence of signal as a means of detection. Here we present an alternate methodology based on spatial speckle statistics, utilizing the similarity of a distribution of given voxel intensities to the power distribution function of pure noise, to visualize the low-scattering biological structures of interest. In a human tumor xenograft murine model, we show that these correspond to lymphatic vessels and nerves; extensive histopathologic validation studies are reported to unequivocally establish this correspondence.

Preclinical quantitative in-vivo assessment of skin tissue vascularity in radiation-induced fibrosis with optical coherence tomography.

Radiation therapy (RT) is widely and effectively used for cancer treatment but can also cause deleterious side effects, such as a late-toxicity complication called radiation-induced fibrosis (RIF). Accurate diagnosis of RIF requires analysis of histological sections to assess extracellular matrix infiltration. This is invasive, prone to sampling limitations, and thus rarely used; instead, current practice relies on subjective clinical surrogates, including visual observation, palpation, and patient symptomatology questionnaires.

Effect of Antioxidant Echinochrome A on Bleomycin-Induced Pulmonary Fibrosis.

We studied the protective effect of antioxidant echinochrome A on bleomycin-induced pulmonary fibrosis in rats at the early stages of postnatal ontogeny. Administration of echinochrome A was shown to reduce the severity of bleomycin-induced oxidative stress in the lungs, prevented the development of hypertrophy of interalveolar connective tissue and peribronchial lymphoid infiltration, and normalized the ratio of volume densities of interalveolar septa and alveolar lumen.