system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most sensitive investigation of thyroid nodule:
assistant
The correct answer is  PET scan are not routinely used in the evaluation of thyroid nodules, however, they may show clinically occult thyroid lesions. USG is the most sensitive method for diagnosing intrathyroid lesions. CT and MRI are neither specific nor sensitive in diagnosing the intrathyroid lesions.