digital subtraction angiography


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angiography

 [an″je-og´rah-fe]
radiography of vessels of the body after injection of contrast material; see also arteriography, lymphangiography, and phlebography. Called also vasography.
digital subtraction angiography radiographic visualization of blood vessels, with images produced by subtracting background structures and enhancing the contrast of those areas that change in density between a preliminary “mask” image and subsequent images.

dig·i·tal sub·trac·tion an·gi·og·ra·phy (DSA),

computer-assisted radiographic angiography that permits visualization of vascular structures without superimposed bone and soft tissue densities; subtraction of images made before and after contrast injection removes structures not enhanced by the contrast medium. Other image processing can be performed. Contrast material may be injected intravenously or in a lower-than-usual amount intraarterially.

digital subtraction angiography (DSA)

a method in which radiographic images of blood vessels filled with contrast material are digitized and then subtracted from images obtained before administration of the material. The method increases the contrast between the vessels and the background.

digital subtraction angiography

Radiology A diagnostic technique that uses video equipment and computers to enhance images obtained with conventional angiography

dig·i·tal sub·trac·tion an·gi·og·ra·phy

(DSA) (dij'i-tăl sŭb-trak'shŭn an'jē-og'ră-fē)
Computer-assisted radiographic angiography permitting visualization of vascular structures without superimposed bone and soft tissue density; images made before and after contrast injection allow subtraction (separation and removal) of opacities not enhanced by the contrast medium Other image-processing can be performed. Contrast material may be injected intravenously or in lower-than-usual amounts intraarterially.
See: digital radiography

digital subtraction angiography

A method of imaging blood vessels that eliminates unwanted detail. Two digitized images are made, before and after injecting a radio-opaque dye. A negative image of one is then combined with the other, so that only differences between the two show up-in this case the dye in the vessels.
References in periodicals archive ?
The digital subtraction angiography revealed total occlusion in the left subclavian artery and superior mesenteric artery.
Cerebral veins: comparative study of CT venography with intraarterial digital subtraction angiography.
Vascular imaging was revolutionized in the 1980s with the development of a technique called Digital Subtraction Angiography.
Treatment decision in ruptured intracranial aneurysms: Comparison between multi-detector row CT angiography and digital subtraction angiography.
Digital subtraction angiography (DSA) under general anaesthesia was planned for further management of the condition.
Digital subtraction angiography is recommended for the evaluation of patients whose treatment plan includes revascularization.
Vascularization of head and neck paragangliomas: Comparison of three MR angiographic techniques with digital subtraction angiography.
Researchers compared intraoperative indocyanine green (ICG) video angiography with both intraoperative and postoperative digital subtraction angiography (DSA).
Diagnostic radiology general; Extremity x-rays; Knee trauma; Diagnostic Arteriography Indications; Cervicocerebral angiography; Digital subtraction angiography (DSA); Infusion Venography; Resources for Angiography Indications; Abdominal and Gastroenterological X-ray Procedures; Cholescintigraphy (HIDA); Intravenous Pyelography (IVP); Cystography and Urethrography; Voiding cystourethrography in Children;
Today, we develop, manufacture and distribute a broad range of diagnostic systems in all areas of clinical application - Digital Subtraction Angiography, Cardiovascular Systems, Digital Radiography & Fluoroscopy Systems, and general radiography equipment.
The system also provides parametric mapping for time-dependent MRI (such as breast MRI), CT/CTA registration and subtraction for CT digital subtraction angiography, and the ability to provide a full cardiovascular clinical work-up on a thin client.
Spinal digital subtraction angiography, however, remains the gold standard in definitive localization and diagnosis of spinal dural AVFs (1, 3, 5, 7) (Figure 3).

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