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': 'In MRI the commonly field used is - \nSelect and explain. \nA. 0.05 tesla, B. 100 tesla, C. 1.1 tesla, D. 11 tesla', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In MR examination, a large static magnetic field is applied. Field strengths for clinical equipment can vary between 0.2 and 7 T Most commonly used current MRI machines in diagnostic use are of 1.1 and 1.5T. Hence the single best answer would be 1.1 T The field strength of the magnet will influence the quality of the MR image regarding: * chemical shift aifacts * the signal to noise ratio (SNR) * motion sensitivity and susceptibility aifacts.', 'role': 'assistant'}]