CPT® Code 74174

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

Computed tomographic angiography (CTA) is a specialized imaging technique that combines the principles of computed tomography (CT) and angiography to visualize the blood vessels within the abdomen and pelvis. This procedure utilizes contrast material to enhance the visibility of vascular structures, allowing for detailed examination. During a CTA, multiple images are captured and processed using advanced computer algorithms to generate comprehensive, three-dimensional cross-sectional views of the blood vessels. The process begins with the patient being positioned on a CT table, where an intravenous line is typically inserted into a peripheral vein, often located in the arm or hand. This line is essential for administering the contrast material, which is injected to improve the clarity of the images. In some cases, non-contrast images may also be obtained to provide a baseline for comparison. Following the injection of a small dose of contrast, test images are taken to ensure proper positioning before the full CTA is conducted. As the scanning progresses, the CT table moves through the CT machine, capturing a series of images that are subsequently reviewed and interpreted by a radiologist. This detailed imaging technique is crucial for diagnosing various vascular conditions and assessing the anatomy of the blood vessels in the abdomen and pelvis.