In the context of diagnostic imaging, why is the liver significant when using unfiltered Tc sulfur colloid?

• A. Indication of inflammation
• B. Assessment of blood flow
• C. Function evaluation
• D. Bone health analysis

Answer: (C)

The liver is significant in the context of diagnostic imaging using unfiltered technetium (Tc) sulfur colloid primarily for function evaluation. When Tc sulfur colloid is administered, it is taken up by the liver due to its ability to bind to liver parenchymal cells. This uptake allows clinicians to assess how well the liver is functioning by evaluating its ability to clear the radiopharmaceutical from the bloodstream.

Impairments in liver function can be detected through imaging, which can reveal issues such as liver disease or dysfunction. Since the liver plays a crucial role in various metabolic processes, determining its functional capacity is essential for diagnosing and managing hepatic conditions. Therefore, using unfiltered Tc sulfur colloid provides valuable information about the physiological status of the liver, corroborating the importance of function evaluation in this imaging scenario.