CTA technical parameters for aorta and peripheral arteries

**Computed tomography angiography (CTA) Technical Parameters for Aorta and Peripheral Arteries**

Optimal CTA imaging requires attention to specific technical parameters that vary by anatomic region:

**Aortic and endovascular aneurysm repair (EVAR) imaging:** High-quality aortic CTA employs submillimeter collimation (≤1 mm) with multiphasic acquisitions including non-contrast, arterial phase (using bolus tracking), and delayed phase for endoleak detection. ECG-gating is applied for thoracic aorta imaging when assessing the aortic root or ascending aorta to minimize motion artifact [@aha2022-g]. Standardized contrast delivery protocols (4–6 mL/s with bolus tracking) ensure consistent arterial enhancement.

**Lower extremity CTA:** Imaging parameters including table speed and reconstruction kernels are optimized for distal runoff vessel assessment in patients with lower extremity peripheral artery disease (PAD), ensuring adequate visualization of tibial and pedal arteries [@svs2024-l].

These technical standards support the planning and surveillance protocols outlined in ESVSthe abdominalEuropean aorticSociety aneurysmfor (AAA)Vascular guidelinesSurgery (ESVS) 2024 Clinical Practice Guidelines on the Management of Abdominal Aorto-Iliac Artery Aneurysms and recent multisociety recommendations for aortic and peripheral vascular disease. [@sun2011] [@esvs2019-aaa][@esvs2024-editors] [@aha2022-g] [@svs2024-l]