What is the primary method used to assess the effectiveness of a therapeutic radiologic procedure?

The primary method used to assess the effectiveness of a therapeutic radiologic procedure is through follow-up imaging studies. This approach allows healthcare professionals to visualize the results of the procedure and determine how well it has achieved its intended therapeutic goals. For example, in the case of cancer treatment, follow-up imaging can reveal changes in tumor size or structure, which provides direct evidence of the treatment's impact and its effectiveness over time.

Follow-up imaging is critical because it can help identify whether further interventions are necessary based on the patient's response to the initial therapy. This data is invaluable in guiding ongoing treatment plans and ensuring optimal patient outcomes. Other methods, while important for overall service evaluation or operational efficiency, do not provide the direct clinical insights that imaging studies offer in assessing therapy effectiveness.