What is a common form of administration for Tc-99m radiopharmaceuticals?

• A. Topical cream
• B. Intravenous injection
• C. Oral capsules
• D. Inhalation

Answer: (B)

The most common method for administering Tc-99m radiopharmaceuticals is through intravenous injection. This route is preferred because it allows for the rapid distribution of the radiopharmaceutical throughout the body, ensuring that it reaches the target organ or tissue efficiently. Intravenous administration provides precise control over the dosage and distribution, which is particularly important in diagnostic imaging where clear and immediate imaging is crucial for accurate results.

In the context of diagnostic imaging, the use of intravenous injection also helps minimize the time between administration and imaging and reduces potential variability in absorption that might occur with other administration routes. Other methods, such as oral or topical administration, may not allow for the necessary precision and prompt visualization of the radiotracer within the body. Inhalation could be suitable for specific types of studies, particularly involving the lungs, but this does not represent the most common approach for the majority of Tc-99m applications.