Magnetic Resonance Imaging (MRI) Questions and Answers Latest Update Already Passed

Magnetic Resonance Imaging (MRI) Questions and Answers Latest Update Already Passed Why must patients remain still during an MRI scan? To prevent motion artifacts Which part of the MRI machine detects the returning radiofrequency signal? Receiver coil What is the main risk of using gadolinium-based contrast agents in patients with kidney disease? Nephrogenic systemic fibrosis Which body plane does a sagittal MRI scan produce? Side-to-side view What is the effect of increasing the magnetic field strength in MRI? Higher signal-to-noise ratio 2 Which MRI sequence is best for detecting acute strokes? Diffusion-weighted imaging (DWI) How does functional MRI (fMRI) measure brain activity? By detecting blood oxygen level changes Which material is considered MRI-safe? Titanium What is the purpose of shimming in MRI? To improve magnetic field homogeneity Which MRI sequence is commonly used to evaluate joint cartilage? Proton density Why are pregnant patients advised to avoid MRI in the first trimester? Potential unknown effects on fetal development 3 Which condition is commonly diagnosed using MR spectroscopy? Brain tumors What does MRI stand for? Magnetic Resonance Imaging Which type of magnet is commonly used in MRI machines? Superconducting magnet What is the primary advantage of MRI over CT in soft tissue imaging? Superior contrast resolution Which atom in the body is primarily used for MRI signal generation? Hydrogen What is the purpose of radiofrequency (RF) pulses in MRI? To excite hydrogen nuclei