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Digital subtraction angiography (DSA) is a fluoroscopy technique used in interventional radiology to clearly visualize blood vessels in a bony or dense soft tissue environment. Images are produced using contrast medium by subtracting a "pre-contrast image" or mask from subsequent images, once the contrast medium has been introduced into a ...
Donor-specific antibodies (DSA) are a concept in transplantation medicine and describe the presence of antibodies specific to the Donor's HLA-Molecules. These antibodies can cause antibody-mediated rejection and are therefore considered a contraindication against transplantation in most cases. [ 1 ]
This is a listing of recipients [1] of the Boy Scouts of America Order of the Arrow's Distinguished Service Award (DSA). See Honors and awards of the Order of the Arrow for a description of the DSA. [2]
The Digital Signature Algorithm (DSA) is a public-key cryptosystem and Federal Information Processing Standard for digital signatures, based on the mathematical concept of modular exponentiation and the discrete logarithm problem. In a public-key cryptosystem, a pair of private and public keys are created: data encrypted with either key can ...
The Development Studies Association (DSA) is a scholarly society.It was formally established at the National Development Research Glasgow Conference in 1978 and currently has 35 institutional members (primarily UK University departments/research centres with some development organisations) and 400 individual and student members.
Digital subtraction angiography (DSA) is a two-dimensional imaging technique for the visualization of blood vessels in the human body (Katzen, 1995). [23] For DSA, the same sequence of a projection is acquired without and then with contrast agent injection through the vessels under investigation. The first image is subtracted from the second to ...
The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample size used in a study is usually determined based on the cost, time, or convenience of collecting the data, and the need for it to offer sufficient statistical power. In complex studies ...
Direct School Admission (DSA) is a scheme in Singapore introduced in 2004 that allows students to be recognised for their strengths in specific talent areas, such as sports, performing arts, or leadership, alongside their academic performance. The scheme enabled students to secure early admission to schools of their choice.