This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Magnetic Resonance Imaging, Subject name: Radiology
[{'content': 'Which MRI sequence is based on anisotropic movements? \nSelect and explain. \nA. DWI, B. SWI, C. DTI, D. FLAIR', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Anisotropy- Propey of being directionally dependent, which implies different propeies in different directions, as opposed to isotropy. DTI- Diffussion tensor imaging/tractography is based on Anisotropic movements DWI - Diffusion weighted imaging is based on Brownian Movements Functional MRI - Is based On BOLD(Blood oxygenation level dependent) imaging', 'role': 'assistant'}]