At any specified radiation dose and system signal-to-noise ratio, temporal (masked-mode) intravenous digital subtraction angiography (IV-DSA) image quality is dependent upon the shape of the arterial time-concentration curve produced by the intravenous injection of iodinated contrast media. If ...
Digital subtraction angiography Digital Subtraction Angiography (DSA) is a technique used in interventional radiology to clearly visualize blood vessels
1 Digital subtraction angiography (DSA) refers to a process in which images of the arteries are taken before and after contrast injection. From:Neurologic Clinics,2010 About this page Set alert Also in subject areas: Biochemistry, Genetics and Molecular Biology ...
Digital subtraction angiography can be used to assess the intracranial circulation. A small amount of nonionic contrast material is injected intravenously or intraarterially while digital subtraction imaging of the cerebral vasculature is completed. This procedure allows visualization of contrast with...
The myth of DSA is derived from its historical roots such as the Steinberg technique, the photographic subtraction technique and the development of angiography, which is recognized as being the decisive method for the detection of the most important epidemiologic diseases of the vascular system. The...
Digital subtraction angiography (DSA), utilizing computerized x-ray imaging equipment for image acquisition and subtraction, will provide substantial improvements in blood vessel imaging. With the high contrast sensitivity of these systems, visualization of major blood vessels using intravenous injections of...
Intra-arterial digital subtraction angiography has become a standard imaging technique that offers both the inherent safety produced by reduction of the volume of contrast material and the added safety afforded by reduction of both the size of the catheter and the time required to perform complex ...
contrast‐enhanced MRAtime‐resolved subtraction MRAimage processingautomatic filteringarteriogramFor time-resolved background-subtracted contrast-enhanced magnetic resonance angiography, the bright and sparse arterial signal allows unique identification of contrast bolus arrival in the arteries. This article ...
Digital Subtraction Angiography: Frame and Geometric Process Digital subtraction angiography is probably the most common example of frame processing in radiology.5 In this technique, a scout or mask image is obtained of the ROl immediately before any contrast is injected (Fig 13). Then a sequence ...
A dynamic MR angiography technique, MR digital subtraction angiography (MR DSA), based on fast acquisition, contrast enhancement and complex subtraction is described. When a bolus of contrast is injec