CPT® Code 70496

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

A computed tomographic angiography (CTA) of the head is a specialized imaging procedure that utilizes advanced technology to visualize the blood vessels in the head. This procedure involves the use of contrast material, which enhances the visibility of the blood vessels during imaging. The process may also include obtaining non-contrast images, which are captured if deemed necessary. The primary goal of a CTA is to provide detailed images of the vascular structures, allowing for the assessment of conditions such as aneurysms, blockages, or other vascular abnormalities. The procedure combines the principles of computed tomography (CT) and angiography, enabling the creation of high-resolution, three-dimensional cross-sectional views of the blood vessels. During the procedure, the patient is carefully positioned on a CT table, and an intravenous line is typically inserted into a peripheral vein, often in the arm or hand, to facilitate the administration of the contrast material. Following the injection of a small dose of contrast, test images are taken to ensure proper positioning before the full CTA is conducted. The contrast is injected at a controlled rate while the CT table moves through the scanning apparatus, capturing a series of images that are subsequently processed and displayed on a computer monitor. After the completion of the CTA, a radiologist reviews and interprets the images to provide diagnostic insights.