What is the purpose of an MRI scan?

An MRI scan, or magnetic resonance imaging, primarily serves the purpose of structural imaging of the body, particularly the brain. This process utilizes powerful magnetic fields and radio waves to generate detailed images of the internal structures. When it comes to brain imaging, MRI is particularly advantageous because it can differentiate between various types of soft tissue, providing high-resolution images that reveal abnormalities in brain structure, tumors, or other pathologies that might not be visible with other imaging techniques.

The use of magnetic fields allows for the capture of detailed images without the use of ionizing radiation, making it a safer alternative when repeated imaging is necessary. MRI is essential in clinical settings for diagnosing conditions such as multiple sclerosis, strokes, and brain injuries, and for planning treatment strategies.

Other imaging techniques mentioned, such as measuring electrical brain activity or analyzing blood flow, utilize different modalities, like EEG or fMRI, respectively. Detecting radioactive substances refers to imaging techniques such as PET scans, which focus on metabolic activity rather than structural imaging. Therefore, the focus on structural imaging through the use of magnetic fields sets MRI apart and defines its primary purpose.