A technique that uses brain imaging methods to observe the anatomy and functioning of blood vessels, especially in the brain. Computer processing capabilities are paired with X-ray techniques for this assessment method.
Computerized imaging of the vasculature with visualization on a monitor screen following the intravenous injection of iodine through a catheter.
A test using computerized images of blood vessels that. lead to the brain and head to determine the adequacy of blood flow (circulation) to the brain.
An X-ray procedure used to visualize blood vessels (both arteries and veins) through a series of computer images after they have been injected with a contrast medium.
A method by which x-ray images of blood vessels filled with contrast material are digitized and then subtracted from images stored before the administration of contrast. Thus, the background is eliminated and only the vessels appear.
An X-ray procedure used to visualize blood vessels (both arteries and veins) through a series of computer images after they have been injected with a contrast medium. Digital subtraction angiography (DSA) uses smaller amounts of injected contrast medium than traditional angiography but still produces high-quality images. This makes the technique especially appropriate for people in whom high-contrast examinations present risks. DSA subtracts the background of bone and soft tissue to provide an image of blood vessels after injection of a contrast medium.
Use of a computer technique to investigate arterial blood circulation. A reference image is obtained by fluoroscopy. Then a contrast medium is injected intravenously. Another image is produced from the fluoroscopic image, after which the computer technique “subtracts” the image produced by surrounding tissues. The third image is an enhanced view of the arteries.