CPT® Code 73706

Computed tomographic angiography, lower extremity, with contrast material(s), including noncontrast images, if performed, and image postprocessing

A computed tomographic angiography (CTA) of the lower extremity is a specialized imaging procedure that utilizes advanced technology to visualize the blood vessels in the legs. This procedure combines the principles of computed tomography (CT) and angiography, allowing for detailed imaging of vascular structures. During the CTA, contrast material is administered to enhance the visibility of blood vessels, which helps in identifying any abnormalities or blockages. The process may also include obtaining non-contrast images, which are captured prior to the administration of the contrast material, providing a baseline for comparison. The images generated during the CTA are processed using sophisticated computer algorithms to create three-dimensional cross-sectional views of the lower extremity's vascular system. This detailed imaging is crucial for diagnosing various vascular conditions, guiding treatment decisions, and planning surgical interventions. The procedure is performed with the patient lying on a CT table, where an intravenous line is typically inserted into a vein in the arm or hand to facilitate the injection of the contrast material. Following the injection, a series of images are captured, and the radiologist subsequently reviews and interprets these images to provide a comprehensive assessment of the lower extremity's vascular health.