This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamentals In Radiology, Subject name: Radiology
[{'content': 'CT scan was invented by- \nSelect and explain. \nA. Hounsfield, B. Roentgen, C. Cormack, D. Tesla', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Hounsfield * A new method of forming images from X-rays (i.e. CT/CAT) was developed and introduced into clinical use by a British physicist Godfrey Hounsfield in 1972.* Godfrey Hounsfield is considered as the inventor of CT/CAT.", 'role': 'assistant'}]