Cystography is typically performed using which radioactive pharmaceutical?

Cystography is a diagnostic imaging technique used to visualize the bladder and its anatomy, often conducted to assess bladder abnormalities or urinary tract issues. The most suitable radioactive pharmaceutical for this procedure is technetium-99m (Tc-99m) labeled compounds, such as Tc-99m pertechnetate or Tc-99m sulfur colloid.

Tc-99m pertechnetate is particularly utilized in cystography because it has favorable imaging characteristics, including a relatively short half-life, which minimizes radiation exposure while providing quality imaging. It readily accumulates in the bladder when instilled as part of the procedure, allowing for clear visualization during the imaging phase. The other substances listed do not have the same suitability for this specific diagnostic purpose, as they are used for different imaging applications.

For instance, gallium-67 citrate is primarily used in tumor imaging and infections but does not specifically target the bladder. Similarly, indium-111 pentetreotide is used primarily for neuroendocrine tumors, and iodine-131 is mainly associated with thyroid imaging and treatment. Therefore, the use of Tc-99m pertechnetate or Tc-99m sulfur colloid for cystography allows for targeted imaging of the bladder, making it