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Searchterm 'Digital Subtraction Angiography' found in 1 term [
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Digital Subtraction Angiography
(DSA) Digital subtraction angiography is a radiographic imaging technique to visualize the blood vessels in the human body. DSA images are produced by the (computer) subtraction of pre-contrast images (the mask) from images after introduction of a contrast medium. Subtracting background structures and enhancing the contrast provides the visualization of blood vessels in a bony or dense soft tissue environment. The images are produced in real time, as the contrast agent is injected into the blood vessels.
Angiography
Decimation
Decimation is the reduction of data at the digitized signal. Fewer samples are used to represent the detected signal. The opposite process is called interpolation, more samples are added.

See also Digital Radiography, and Digital Subtraction Angiography.
Optiray®
Optiray® is a radiographic contrast agent. Optiray® is available in concentrations from 160 to 350 mg/mL organically bound iodine. Optiray® solutions have osmolalities 1.2 to 2.8 times that of plasma (285 mOsm/kg water).
Optiray® 160 is recommended for intraarterial digital subtraction angiography (IA-DSA).
See also Single-Head Contrast Media Injector, Dual-Head CT Power Injector, Syringeless CT Power Injector.

Drug Information and Specification
NAME OF COMPOUND
Ioversol
DEVELOPER
Mallinckrodt, Inc.
INDICATION
Brain and body computed tomography, urography, angiography
APPLICATION
Intravascular
PHARMACOKINETIC
Renal excretion
CHEMICAL BOND
Nonionic
355, 502, 651, 702, 792 mosm/kgH2O
IODINE CONCENTRATION
160, 240, 300, 320, 350 mg/mL
Depending on the used concentration and imaging procedure
PREPARATION
Ready-to-use product
STORAGE
Store at 25°C (77°F)
PRESENTATION
Depending on the concentration: 20, 30 mL vials, 50, 75, 100, 150, 200 mL bottles,
30, 50 mL prefilled hand held plastic syringes, and various power injector syringes (OptiVantage)
DO NOT RELY ON THE INFORMATION PROVIDED HERE, THEY ARE NOT A SUBSTITUTE FOR THE ACCOMPANYING PACKAGE INSERT!
Post-Processing
Digital images can be manipulated for evaluation in various ways. Post-processing includes: Subtraction, addition, rotation, inversion, multiplanar reconstruction (MPR), maximum intensity projection (MIP), etc.
Subtraction is particularly useful in contrast enhanced examinations. The pre contrast images are subtracted from the images after an injection of contrast agents (sometimes also called dye) for better tumor detection. See also Contrast Enhanced Computed Tomography, Digital Subtraction Angiography and Active Zone.
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 [last update: 2023-11-06 02:01:00]