What is the primary diagnostic imaging modality for evaluating liver lesions?

The primary diagnostic imaging modality for evaluating liver lesions is ultrasound. This technique is highly effective due to its ability to provide real-time imaging and assess the liver's size, texture, and presence of lesions without exposing the patient to ionizing radiation. Ultrasound is particularly useful for identifying cysts, tumors, and other abnormalities, as well as for guiding interventional procedures such as biopsies.

One of the advantages of ultrasound is its accessibility and cost-effectiveness, making it a first-line imaging tool in many clinical settings. Additionally, ultrasound can be performed quickly, which is beneficial in emergency situations or when rapid assessment is needed.

While CT and MRI are also important in liver evaluation and can provide more detailed imaging in certain cases, ultrasound is generally the first modality used for initial assessment of liver lesions. This initial evaluation can help determine whether further imaging with CT or MRI is necessary based on the ultrasound findings.