Final answer:
The interpreting physician is the individual who should sign a written report as an integral part of a radiologic procedure or interpretation.
Step-by-step explanation:
The correct answer is D) Interpreting physician.
A written report, signed by the interpreting physician, is considered an integral part of a radiologic procedure or interpretation. This report contains the physician's analysis and findings based on the images produced by radiologic technologists or technicians. It provides important information for diagnosing diseases or conditions.