MRI Mock Registry Exam Questions and Answers Already Passed

MRI Mock Registry Exam Questions and Answers Already Passed What happens when flip angle is increased in gradient echo sequences? A. T1 contrast increases B. T2 contrast is enhanced C. Image noise decreases D. Spatial resolution improves What is the role of k-space in MRI? A. It stores only T2-weighted information B. It defines the matrix size C. It holds raw signal data before image reconstruction D. It enhances contrast in T1-weighted sequences Which type of imaging artifact is commonly seen near air-tissue interfaces? A. Susceptibility artifact B. Phase wrap artifact C. Ghosting artifact 2 D. Partial volume averaging Which technique is best for detecting microhemorrhages in the brain? A. T1-weighted spin-echo B. FLAIR imaging C. Susceptibility-weighted imaging (SWI) D. Diffusion-weighted imaging Which parameter adjustment will reduce motion artifacts in MRI? A. Decreasing TR B. Using respiratory triggering or gating C. Reducing bandwidth D. Increasing phase encoding steps Which MRI sequence is best suited for evaluating joint cartilage? A. Proton density-weighted imaging B. T1-weighted imaging C. Time-of-flight angiography 3 D. Susceptibility-weighted imaging Which factor contributes most to scan time in an MRI sequence? A. Bandwidth B. Repetition time (TR) and phase encoding steps C. Flip angle D. Slice thickness Which MRI sequence is best for assessing bone marrow abnormalities? A. Diffusion-weighted imaging B. Gradient echo C. Short tau inversion recovery (STIR) D. Time-of-flight angiography What is the advantage of using a phased-array coil in MRI? A. It shortens scan time B. It improves signal reception and increases SNR C. It eliminates artifacts 4 D. It enhances T2 contrast What is the primary function of gradient coils in an MRI system? A. To generate the main magnetic field B. To transmit radiofrequency pulses C. To spatially encode signals for image formation D. To reduce scan time Which parameter adjustment will improve signal-to-noise ratio (SNR) in MRI? A. Increasing bandwidth B. Reducing field of view C. Increasing the number of signal averages (NEX) D. Decreasing TR Why is gadolinium-based contrast agent preferred in MRI? A. It shortens T2 relaxation B. It increases scan time C. It enhances tissue contrast by shortening T1 relaxation 5 D. It reduces signal intensity in all tissues Which sequence is best for detecting acute ischemic stroke? A. T1-weighted imaging B. Diffusion-weighted imaging (DWI)