MRI Additional Questions and Answers Latest Update 100% Pass

MRI Additional Questions and Answers Latest Update 100% Pass What is the main purpose of an MRI scan? To produce detailed images of internal body structures using magnetic fields and radio waves. Why is it important for a patient to remove metal objects before an MRI scan? Metal objects can be attracted to the MRI magnet and cause safety hazards or distort the images. How does an MRI differentiate between different types of tissues? By detecting variations in the relaxation times of hydrogen protons in different tissues. What role does a radiofrequency coil play in an MRI scanner? It transmits and receives signals to and from the body to create images. Why might a contrast agent be used during an MRI scan? To enhance the visibility of certain structures, such as blood vessels or tumors. 2 What does the term "T1-weighted" MRI refer to? An image type that highlights fat while providing good anatomical detail. Why must a patient remain still during an MRI scan? Movement can cause blurred images, reducing their diagnostic quality. What is the function of gradient coils in an MRI machine? They create variations in the magnetic field to localize signals and form images. Why might a patient hear loud knocking sounds during an MRI scan? The sounds are caused by rapid changes in current through the gradient coils. How is claustrophobia managed in patients undergoing an MRI scan? By using open MRI scanners, sedation, or patient reassurance techniques. What is the significance of the superconducting magnet in an MRI machine? It generates a strong and stable magnetic field required for imaging. 3 Why should certain implants be checked before an MRI scan? Some implants may be affected by the magnetic field, leading to movement, heating, or malfunction. What is the purpose of an MRI safety zone system in medical facilities? To prevent unauthorized access and ensure patient and staff safety around the MRI magnet. How does an MRI scan differ from a CT scan? MRI uses magnetic fields and radio waves, while CT scans use X-rays. What is the primary reason for using diffusion-weighted imaging (DWI) in MRI? To detect changes in the movement of water molecules, useful for identifying stroke or tumors. What is the effect of increasing the magnetic field strength in MRI? It improves image resolution but may also increase scan time and safety concerns. 4 Why is functional MRI (fMRI) used in brain studies? To measure brain activity by detecting changes in