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    • 3. 发明申请
    • Automatic registration of images
    • US20060276698A1
    • 2006-12-07
    • US11146278
    • 2005-06-07
    • Gisli HalldorssonEinar StefanssonJon BenediktssonRobert KarlssonSveinn HardarsonThor EysteinssonJames Beach
    • Gisli HalldorssonEinar StefanssonJon BenediktssonRobert KarlssonSveinn HardarsonThor EysteinssonJames Beach
    • A61B5/00
    • A61B3/1241A61B5/14555A61B5/7264
    • The present invention relates to a system for automatically evaluating oxygen saturation of the optic nerve and retina, said system comprising: image capturing system further comprising: a fundus camera (26), a four wavelengths beam splitter (27), a digital image capturing device (28), a computer system, image processing software performing in real-time the steps of: registering set of multi-spectral images (1) by, binarizing the multi-spectral image (7), find the all the border regions of each image by finding the region including the straight line that passes the most number of points in the region (8), use the orientation of the borders to evaluate the orientation of each spectral image (9), equalize the orientation of each spectral image by rotating the spectral image (10), edge detect each spectral image (11), estimate the translation between the spectral images based on the edges of adjacent images (12), transform the images to a stack of registered images (13), locating blood vessels (2) in each of the multi-spectral images by, retrieving registered spectral images (14), for each spectral image, remove defective pixels (15), enhance image contrast (16), perform top-hat transform using structuring element larger than the largest vessel diameter (17), binarize each image (18), apply filter for smoothing the image (19), combine all the spectral images using binary AND operator (20), skeletonize the resulting image (21), prune the skeleton image (22), re-grow the pruned image (23), locate junction points (24), evaluating the width of the blood vessels (3) by calculating the normal vector to the vessel direction to, estimate the direction and position of the vessel profile, evaluate positions of vessel walls based on the vessel profile obtained, evaluate vessel width based on the position of the vessel walls, selecting samples for calculating optical density, calculating the optical density ratio (4), evaluating oxygen saturation level (5), and presenting the results (6), wherein presenting the results may include presenting numerical and visual representation of the oxygen saturation.
    • 5. 发明申请
    • CYCLODEXTRIN NANOTECHNOLOGY FOR OPHTHALMIC DRUG DELIVERY
    • CYCLODEXTRIN NANOTECHNOLOGY OPHTHALMIC DRUG DELIVERY
    • US20120028944A1
    • 2012-02-02
    • US13014964
    • 2011-01-27
    • Thorsteinn LoftssonEinar Stefansson
    • Thorsteinn LoftssonEinar Stefansson
    • A61K31/573A61K31/403A61K38/13A61K31/565A61P31/12A61K31/42A61K31/58A61P27/02A61P29/00A61P31/04A61K31/506A61K31/5513
    • A61K31/5377A61K9/0043A61K9/0048A61K9/10A61K31/404A61K31/42A61K31/5513A61K31/565A61K31/573A61K31/58A61K38/13A61K47/6905A61K47/6951B82Y5/00Y10S514/914
    • The invention provides an ophthalmic composition which is an aqueous suspension comprising drug, cyclodextrin and water, the composition having an aqueous phase of from about 0.1% (w/v) to about 90% (w/v) of the drug in solution, as dissolved free drug and as dissolved drug/cyclodextrin complex(es), and a solid phase of from about 10% (w/v) to about 99.9% (w/v) of the drug as solid drug/cyclodextrin particles, suspended in the aqueous phase; the size of the solid particles being from about 10 nm to about 1 mm, the drug/cyclodextrin particles being capable of dissolving in aqueous tear fluid within 24 hours of application to the eye surface. The aqueous eye suspension can be in the form of eye drops, eye gel or eye mist. Further, the invention provides a method for treating a condition of the posterior segment and/or anterior segment of the eye comprising applying to the eye surface, in an amount which delivers to said segment or segments a therapeutically effective amount of a drug suitable for treating said condition, an ophthalmic composition which is as defined above. Nasal compositions and methods and ophthalmic and nasal compositions in powder form are also provided.
    • 本发明提供了一种眼用组合物,其为包含药物,环糊精和水的水性悬浮液,所述组合物的水相为溶液中约0.1%(w / v)至约90%(w / v) 溶解的药物和溶解的药物/环糊精复合物,以及作为固体药物/环糊精颗粒的约10%(w / v)至约99.9%(w / v)的药物的固相,悬浮于 水相; 固体颗粒的尺寸为约10nm至约1mm,药物/环糊精颗粒能够在施用于眼表面后24小时内溶解于水性泪液中。 水性眼睛悬浮液可以是滴眼液,眼凝胶或眼睛雾沫的形式。 此外,本发明提供了一种用于治疗眼部后段和/或前段的病症的方法,包括向眼表面施用一定量的量,其量递送至所述片段或分段治疗有效量的适于治疗的药物 所述病症,如上所述的眼用组合物。 还提供鼻组合物和方法以及粉末形式的眼和鼻组合物。
    • 6. 发明授权
    • Cyclodextrin nanotechnology for ophthalmic drug delivery
    • 环糊精纳米技术用于眼科药物递送
    • US08633172B2
    • 2014-01-21
    • US13758955
    • 2013-02-04
    • Thorsteinn LoftssonEinar Stefansson
    • Thorsteinn LoftssonEinar Stefansson
    • A61K31/724A61K31/715
    • A61K47/48969A61K9/0043A61K9/0048A61K9/10A61K31/404A61K31/42A61K31/5377A61K31/5513A61K31/565A61K31/573A61K31/58A61K38/13A61K47/6905A61K47/6951B82Y5/00Y10S514/914
    • The invention provides an ophthalmic composition which is an aqueous suspension comprising drug, cyclodextrin and water, the composition having an aqueous phase of from about 0.1% (w/v) to about 90% (w/v) of the drug in solution, as dissolved free drug and as dissolved drug/cyclodextrin complex(es), and a solid phase of from about 10% (w/v) to about 99.9% (w/v) of the drug as solid drug/cyclodextrin particles, suspended in the aqueous phase; the size of the solid particles being from about 10 nm to about 1 mm, the drug/cyclodextrin particles being capable of dissolving in aqueous tear fluid within 24 hours of application to the eye surface. The aqueous eye suspension can be in the form of eye drops, eye gel or eye mist. Further, the invention provides a method for treating a condition of the posterior segment and/or anterior segment of the eye comprising applying to the eye surface, in an amount which delivers to said segment or segments a therapeutically effective amount of a drug suitable for treating said condition, an ophthalmic composition which is as defined above. Nasal compositions and methods and ophthalmic and nasal compositions in powder form are also provided.
    • 本发明提供了一种眼用组合物,其为包含药物,环糊精和水的水性悬浮液,所述组合物的水相为溶液中约0.1%(w / v)至约90%(w / v) 溶解的药物和溶解的药物/环糊精复合物,以及作为固体药物/环糊精颗粒的约10%(w / v)至约99.9%(w / v)的药物的固相,悬浮于 水相; 固体颗粒的尺寸为约10nm至约1mm,药物/环糊精颗粒能够在施用于眼表面后24小时内溶解于水性泪液中。 水性眼睛悬浮液可以是滴眼液,眼凝胶或眼睛雾沫的形式。 此外,本发明提供了一种用于治疗眼部后段和/或前段的病症的方法,包括向眼表面施用一定量的量,其量递送至所述片段或分段治疗有效量的适于治疗的药物 所述病症,如上所述的眼用组合物。 还提供鼻组合物和方法以及粉末形式的眼和鼻组合物。
    • 8. 发明申请
    • Cyclodextrin nanotechnology for ophthalmic drug delivery
    • 环糊精纳米技术用于眼科药物递送
    • US20070020336A1
    • 2007-01-25
    • US11489466
    • 2006-07-20
    • Thorsteinn LoftssonEinar Stefansson
    • Thorsteinn LoftssonEinar Stefansson
    • A61K38/13A61K38/39A61K31/724A61K31/717A61K31/573A61K31/5513A61K31/557A61K31/19A61K9/14
    • A61K47/48969A61K9/0043A61K9/0048A61K9/10A61K31/404A61K31/42A61K31/5377A61K31/5513A61K31/565A61K31/573A61K31/58A61K38/13A61K47/6905A61K47/6951B82Y5/00Y10S514/914
    • The invention provides an ophthalmic composition which is an aqueous suspension comprising drug, cyclodextrin and water, the composition having an aqueous phase of from about 0.1% (w/v) to about 90% (w/v) of the drug in solution, as dissolved free drug and as dissolved drug/cyclodextrin complex(es), and a solid phase of from about 10% (w/v) to about 99.9% (w/v) of the drug as solid drug/cyclodextrin particles, suspended in the aqueous phase; the size of the solid particles being from about 10 nm to about 1 mm, the drug/cyclodextrin particles being capable of dissolving in aqueous tear fluid within 24 hours of application to the eye surface. The aqueous eye suspension can be in the form of eye drops, eye gel or eye mist. Further, the invention provides a method for treating a condition of the posterior segment and/or anterior segment of the eye comprising applying to the eye surface, in an amount which delivers to said segment or segments a therapeutically effective amount of a drug suitable for treating said condition, an ophthalmic composition which is as defined above. Nasal compositions and methods and ophthalmic and nasal compositions in powder form are also provided.
    • 本发明提供了一种眼用组合物,其为包含药物,环糊精和水的水性悬浮液,所述组合物的水相为溶液中约0.1%(w / v)至约90%(w / v) 溶解的药物和溶解的药物/环糊精复合物,以及作为固体药物/环糊精颗粒的约10%(w / v)至约99.9%(w / v)的药物的固相,悬浮于 水相; 固体颗粒的尺寸为约10nm至约1mm,药物/环糊精颗粒能够在施用于眼表面后24小时内溶解于水性泪液中。 水性眼睛悬浮液可以是滴眼液,眼凝胶或眼睛雾沫的形式。 此外,本发明提供了一种用于治疗眼部后段和/或前段的病症的方法,包括向眼表面施用一定量的量,其量递送至所述片段或分段治疗有效量的适于治疗的药物 所述病症,如上所述的眼用组合物。 还提供鼻组合物和方法以及粉末形式的眼和鼻组合物。