CPT® Code 78206

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Liver imaging using single-photon emission computed tomography (SPECT) is a specialized diagnostic procedure that employs a radiolabeled isotope tracer, specifically 99mTC-sulfur colloid, to visualize the liver's structure and function. This imaging technique is particularly valuable for identifying small lesions that may not be visible through traditional planar imaging methods. It is also utilized to evaluate liver masses or lesions that have been previously detected through other imaging modalities such as computed tomography (CT), ultrasound (US), or magnetic resonance imaging (MRI). Additionally, SPECT liver imaging plays a crucial role in monitoring chronic liver conditions, including cirrhosis and hepatitis C infection. The liver, located in the upper right quadrant of the abdomen, is a vital organ responsible for various functions, including bile production, nutrient metabolism, drug and toxin removal from the bloodstream, and the synthesis of proteins essential for blood plasma and clotting regulation. The liver's complex structure consists of two main lobes and numerous smaller lobules interconnected by a network of ducts that facilitate bile drainage into larger ducts, ultimately leading to the hepatic duct. The bile produced by the liver contains enzymes that aid in fat breakdown and transport waste materials to the gallbladder and duodenum. During the SPECT procedure, an intravenous line is established to administer the radiolabeled tracer, followed by a waiting period before the patient is positioned on the imaging table. One or more gamma cameras then rotate around the patient to capture a three-dimensional image of the liver. This imaging process allows for the assessment of vascular flow within the liver, which is critical given the organ's rich blood supply from the portal vein and hepatic artery. Any compromise in blood flow from one vessel can significantly affect the surrounding vascular structures. The physician interprets the resulting SPECT images and generates a comprehensive written report detailing the findings.