Subtraction
51thallium-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… …
52digital subtraction angiography — a computerized x ray technique in which arteries are visualized following injection of dye into a vein. Abbr.: DSA * * * …
53Incremental letterspace subtraction — Последовательное уменьшение межбуквенных пробелов (в акцидентном наборе) …
54digital 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 …
55intra-arterial digital subtraction angiography — a type of arteriography that uses electronic circuitry to subtract the background of bone and soft tissue to provide a useful image of the arteries injected with contrast medium …
56intravenous digital subtraction angiography — a type of phlebography that uses electronic circuitry to subtract the background of bone and soft tissue to provide a useful image of the veins injected with contrast medium …
57digital 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… …
58subtract, subtraction — Ho olawe …
59digital subtraction angiography — a computerized x ray technique in which arteries are visualized following injection of dye into a vein. Abbr.: DSA …
60subtractive hybridization — (= subtraction cloning) Technique used to identify genes expressed differentially between two tissue samples. A large excess of mRNA from one sample is hybridized to cDNA from the other, and the double stranded hybrids removed by physical means.… …