A patient presents with symptoms of carotid artery disease. Which imaging technique is typically first-line?

Ultrasound is typically the first-line imaging technique for evaluating carotid artery disease due to its numerous advantages. It is a non-invasive, readily available, and cost-effective method that provides real-time images of the carotid arteries. Doppler ultrasound can assess blood flow and identify the presence of stenosis or occlusion, making it particularly useful for diagnosing conditions like carotid artery disease.

The ultrasound technique does not require contrast agents or exposure to radiation, which are considerations in the use of other imaging modalities. Its ability to provide immediate results helps in urgent settings where timely diagnosis can impact treatment decisions. Given these factors, ultrasound serves as an optimal initial approach before potentially moving on to more advanced imaging methods if necessary.