CPT® Code 71555

Magnetic resonance angiography (MRA) is a specialized imaging technique used to visualize the blood vessels in the chest. This noninvasive diagnostic procedure employs a powerful magnetic field combined with radiofrequency pulses to generate detailed images of the vascular structures. The primary purpose of MRA is to assess various conditions affecting the blood vessels, such as aortic aneurysms, vascular injuries resulting from trauma, and the evaluation of arteries that may supply blood to tumors prior to interventions like chemoembolization or radiation therapy. Additionally, MRA is instrumental in identifying dissections in the aorta and its major branches, demonstrating the extent of atherosclerosis before surgical procedures, and assessing vascular status following surgical interventions. It is also utilized for screening arterial diseases, particularly in individuals with a family history of such conditions, and for detecting pulmonary embolism. The imaging process involves obtaining multiple slices of 1-2 mm thickness, which are then processed to create maximum intensity projections (MIPs). These MIPs resemble subtraction angiograms and allow for a clearer view of areas of interest. The radiologist identifies these areas and requests further detailed imaging, which is facilitated by a technologist through post-processing. The final images, along with the initial MRA results, are reviewed by the radiologist, who subsequently generates a comprehensive written report detailing the findings. In some cases, an intravenous line may be established to administer contrast material, enhancing the visualization of the blood vessels during the procedure.