CT Angiography (CTA) – Head, Pulmonary, Thoracic, Abdominal, and Limb Arteries

CT Angiography (CTA) – Head, Pulmonary, Thoracic, Abdominal, and Limb Arteries

CT Angiography (CTA) is a specialized contrast-enhanced CT scan used to evaluate arteries and veins in different body regions. It helps diagnose aneurysms, stenosis (narrowing), thrombosis (blood clots), dissections, and vascular malformations.

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Types of CT Angiography (CTA) and Their Indications

1️⃣ CTA Head & Neck (Cerebral & Carotid Arteries)

🧠 Used for:
✔ Detecting brain aneurysms (risk of rupture)
✔ Diagnosing stroke (ischemic or hemorrhagic)
✔ Assessing carotid artery stenosis (blockage causing stroke risk)
✔ Identifying arteriovenous malformations (AVMs)
✔ Evaluating head/neck trauma (vascular injury, dissections)

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2️⃣ CTA Pulmonary (Lung Arteries)

🫁 Used for:
✔ Diagnosing pulmonary embolism (PE) (blood clots in lung arteries)
✔ Evaluating pulmonary hypertension (high blood pressure in lung arteries)
✔ Identifying lung tumors affecting major blood vessels
✔ Detecting vascular malformations in the lungs

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3️⃣ CTA Thoracic (Aorta & Chest Arteries)

🫀 Used for:
✔ Detecting thoracic aortic aneurysm or dissection (life-threatening aorta tears)
✔ Evaluating coronary artery anomalies
✔ Assessing traumatic chest injuries (aortic rupture, vascular damage)
✔ Diagnosing thoracic outlet syndrome (TOS) (compressed blood vessels)

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4️⃣ CTA Abdominal (Aorta & Abdominal Arteries)

🩺 Used for:
✔ Detecting abdominal aortic aneurysm (AAA)
✔ Evaluating renal artery stenosis (cause of high blood pressure)
✔ Diagnosing mesenteric ischemia (restricted blood flow to intestines)
✔ Assessing vascular involvement in abdominal tumors

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5️⃣ CTA Limbs (Peripheral Arteries – Upper & Lower Limbs)

🦵 Used for:
✔ Detecting peripheral artery disease (PAD) (blockage in limb arteries)
✔ Evaluating critical limb ischemia (CLI) (severe narrowing causing tissue damage)
✔ Identifying deep vein thrombosis (DVT) or arterial embolism
✔ Assessing vascular trauma (injury to blood vessels in arms or legs)
✔ Planning for bypass surgery or stenting in limb arteries

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Procedure of CT Angiography (CTA)

1. Preparation:

🔹 Fasting for 4–6 hours before the scan.
🔹 Serum Creatinine Test (to check kidney function before contrast use).
🔹 Remove metallic objects (jewelry, piercings) from the scanned area.

2. During the Scan:

✅ Patient lies on a CT scan table.
✅ A high-speed CT scanner captures images while an IV contrast dye (iodine-based) is injected.
✅ Images are taken during peak contrast circulation for the best visualization.
✅ The procedure takes 15–20 minutes.

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Results & Interpretation

✅ Normal Arteries: No blockages, aneurysms, or vascular abnormalities.
🚩 Aneurysm: Swelling in an artery that may rupture.
🚩 Stenosis (Narrowing of Arteries): Can cause stroke, heart attack, or limb ischemia.
🚩 Pulmonary Embolism: Blood clot blocking lung arteries.
🚩 Aortic Dissection: Life-threatening tear in the aorta.
🚩 Peripheral Artery Disease (PAD): Reduced blood flow to the limbs, causing pain.
🚩 Vascular Malformations (AVMs): Abnormal connections between arteries and veins.

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Why is CT Angiography Important?

✔ Non-invasive alternative to traditional catheter angiography
✔ Faster and highly detailed imaging of blood vessels
✔ Essential for diagnosing strokes, aneurysms, pulmonary embolism, and limb ischemia