Question 1

What is the Meaning of CTA?

Accepted Answer

Computed Tomography Angiography, CTA, is a specialized medical imaging technique utilizing X-rays and computer processing to create detailed images of blood vessels and surrounding tissues. This diagnostic procedure typically involves intravenous administration of a contrast agent, enhancing vascular visibility.

Question 2

What is the Context of CTA?

Accepted Answer

CTA serves as a vital tool within diagnostic radiology, specifically for visualizing the body's vascular system. It assesses arterial and venous networks in regions like the brain, heart, lungs, and extremities. This modality provides critical insights into circulatory system integrity and function.

Question 3

What is the Significance of CTA?

Accepted Answer

The clinical importance of CTA is substantial, aiding accurate diagnosis of numerous vascular conditions affecting patient health. Identifying abnormalities such as aneurysms, stenoses, or occlusions allows clinicians to formulate precise treatment plans. This diagnostic clarity contributes to improved patient management and better health outcomes.

Question 4

What is the Mechanism of CTA?

Accepted Answer

CTA operates by rapidly acquiring X-ray images after timed intravenous injection of an iodine-based contrast medium. As the contrast circulates, it absorbs X-rays more efficiently, creating a distinct signal. Computer algorithms then process raw data to reconstruct high-resolution two-dimensional and three-dimensional vascular images.

Question 5

What is the Application of CTA?

Accepted Answer

In clinical practice, CTA evaluates individuals with suspected vascular pathology. It is indispensable for assessing acute stroke with large vessel occlusion, diagnosing pulmonary embolism, characterizing peripheral artery disease, or evaluating coronary anatomy. Its utility extends to pre-surgical planning and post-procedural assessment.

Question 6

What is the Metric of CTA?

Accepted Answer

Assessment of CTA findings relies on expert interpretation by a radiologist. Key metrics include vessel patency, degree of luminal narrowing, presence and characteristics of atherosclerotic plaques, and precise dimensions of vascular lesions. These observations guide clinical decision-making.

Question 7

What is the Risk of CTA?

Accepted Answer

While CTA offers diagnostic benefit, potential risks exist. Patients may experience adverse reactions to the iodine contrast agent, from mild hypersensitivity to severe anaphylaxis. There is also risk of contrast-induced nephropathy, particularly in those with pre-existing renal impairment. The procedure involves ionizing radiation exposure, necessitating careful consideration of clinical indication.

CTA

Meaning

Context

Significance

Mechanism

Application

Metric

Risk

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