- subtraction technique
- метод криптоанализа на основе вычитания одного шифротекста из другого
Англо-русский словарь по компьютерной безопасности. Академик.ру. 2011.
subtraction technique
Смотреть что такое "subtraction technique" в других словарях:
subtraction — A technique used to enhance detectability of opacified anatomic structures on radiographic or scintigraphic images; a negative of an image made before introduction of contrast medium or radionuclide is photographically or electronically removed… … Medical dictionary
Dark-frame subtraction — In digital photography, dark frame subtraction is a way to minimize image noise for pictures taken with long exposure times. It takes advantage of the fact that a component of image noise, known as fixed pattern noise, is the same from shot to… … Wikipedia
Digital subtraction angiography — Intervention Example of iodine based contrast in cerebral angiography MeSH … Wikipedia
Intravenous digital subtraction angiography — (IV DSA) is a form of angiography which was first developed in the late 1970s. IV DSA uses a computer technique which compares an x ray image of a region of the body before and after radiopaque iodine based dye has been injected intravenously… … Wikipedia
digital subtraction — a sophisticated radiological technique in which digitization allows X ray examination, most commonly of blood vessels (see angiography), to be performed using smaller volumes of contrast material. A digitized image is taken before the contrast… … Medical dictionary
thallium-technetium isotope subtraction imaging — a technique to image the parathyroid glands. Technetium is taken up only by the thyroid gland, but thallium is taken up by both the thyroid and parathyroid glands. digital subtraction of the two isotopes leaves an image of the parathyroid glands… … Medical dictionary
thallium-technetium isotope subtraction imaging — a technique to image the parathyroid glands. Technetium is taken up only by the thyroid gland, but thallium is taken up by both the thyroid and parathyroid glands. Digital subtraction of the two isotopes leaves an image of the parathyroid glands… … The new mediacal dictionary
digital subtraction — a radiological technique that enhances X ray images, most commonly of blood vessels (see angiography). A digitized image is taken before the contrast medium (a ‘mask’) is added, and this is subtracted by computer from the images taken after… … The new mediacal dictionary
digital subtraction angiography — a computerized x ray technique in which arteries are visualized following injection of dye into a vein. Abbr.: DSA * * * … Universalium
digital subtraction angiography — an angiographic technique that produces images by subtracting background structures and enhancing the contrast of those areas that change in density between a preliminary “mask†image and subsequent images … Medical dictionary
digital subtraction angiography — a computerized x ray technique in which arteries are visualized following injection of dye into a vein. Abbr.: DSA … Useful english dictionary
