What is a typical dose for Rubidium-82 Cl in cardiac imaging?

In cardiac imaging, Rubidium-82 (Rb-82) is often utilized for Positron Emission Tomography (PET) scans to assess myocardial blood flow. The typical administered dose for Rb-82 is around 60 mCi, which aligns well with standard practice when performing such scans.

This dosage is carefully considered based on the pharmacokinetics of Rb-82, as well as the need to achieve optimal imaging quality while minimizing patient exposure to radiation. This balance is vital for ensuring accurate assessments of myocardial perfusion without exceeding safe radiation limits.

Higher doses, such as 75 mCi, may not be routinely used in practice because they could increase radiation exposure unnecessarily without providing proportional benefits in diagnostic information. Similarly, doses below the standard, such as 30 or 45 mCi, might not deliver sufficient imaging quality for accurate interpretation.

Thus, the correct choice reflects a widely accepted clinical practice that provides a robust image while adhering to safety guidelines in radiopharmacy.