What determines the signal intensity in an MR image?, Proton density only, T1 relaxation only, Combination of proton density, T1 and T2 relaxation times, The type of magnet used, Which MRI sequence is most sensitive to detecting acute infarction?, T2-weighted, Diffusion-Weighted Imaging (DWI), FLAIR, GRE, In T1-weighted imaging, fat appears:, Dark, Bright, Intermediate, Variable depending on TE, The role of TR (Repetition Time) in MRI is to control:, T2 contrast, T1 contrast, Slice thickness, Gradient strength, Which of the following is a contraindication for MRI?, Dental fillings, Pacemaker (non-MRI compatible), Hip prosthesis (MRI safe), Tattoos, Gadolinium contrast mainly affects:, Proton density, T1 relaxation time, T2 relaxation time, Slice profile, Which parameter combination produces a T2-weighted image?, Long TR, long TE, Long TR, short TE, Short TR, short TE, Short TR, long TE, What is the purpose of Gradient Echo (GRE) sequences?, To minimize motion, To achieve faster imaging and detect susceptibility effects, To reduce SAR, To improve fat suppression, A common artifact caused by patient movement is:, Chemical shift, Ghosting artifact, Aliasing, Magnetic susceptibility, Which of the following will increase SNR (Signal-to-Noise Ratio)?, Increasing slice thickness, Increasing matrix size, Decreasing voxel size, Using longer TE.
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