DIGITAL SUBTRACTION ANGIOGRAPHY Meaning and
Definition
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Digital Subtraction Angiography (DSA) is a medical imaging technique that involves the use of X-rays to visualize blood vessels and evaluate their condition. It utilizes a computerized system to subtract the images acquired before and after the injection of a contrast agent into the bloodstream, creating a detailed and enhanced view of the blood vessels.
The process begins with the introduction of a contrast agent, typically iodine-based, into the patient's bloodstream via a catheter. X-ray images are then captured of the area of interest both prior to and following the injection, referred to as the pre-contrast and post-contrast images, respectively. The computer system then subtracts the pre-contrast image from the post-contrast image, eliminating the non-vascular structures and highlighting only the blood vessels.
Digital subtraction angiography provides numerous advantages over traditional angiography techniques. Firstly, it allows for the visualization of smaller blood vessels and more precise evaluation of their condition. It also enables real-time imaging, making it suitable for interventional procedures such as placing stents or embolization. Additionally, it reduces exposure to X-ray radiation compared to conventional angiography methods.
This imaging technique is commonly utilized in the diagnosis and treatment of various vascular conditions, including stenosis (narrowing) or occlusion (blockage) of blood vessels, aneurysms (abnormal balloon-like bulges), arteriovenous malformations (tangles of abnormal blood vessels), and tumors. Digital subtraction angiography plays a crucial role in guiding clinicians in making informed decisions regarding treatment options and in monitoring the outcomes of interventions.
Common Misspellings for DIGITAL SUBTRACTION ANGIOGRAPHY
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