resonanssikuvausta

Resonanssikuvausta, commonly known as magnetic resonance imaging (MRI), is a non-invasive medical imaging technique that produces detailed anatomical images of the internal organs and soft tissues. It utilizes strong magnetic fields and radio waves to generate these images. The process begins by placing the patient within a powerful magnetic field, which aligns the protons within the body's water molecules. Then, brief radiofrequency pulses are applied, which knock these aligned protons out of equilibrium. When the radiofrequency pulse is turned off, the protons realign with the magnetic field, releasing energy in the form of radio signals. These signals are detected by a receiver and processed by a computer to create cross-sectional images. Different tissues exhibit different rates of proton realignment and signal emission, allowing the MRI scanner to distinguish between them. MRI is particularly useful for visualizing soft tissues like the brain, spinal cord, muscles, ligaments, and internal organs, where X-rays and CT scans may not provide as much detail. It is often used for diagnosing a wide range of conditions, including tumors, strokes, infections, inflammatory diseases, and injuries. MRI does not use ionizing radiation, making it a safer alternative to X-rays and CT scans for certain applications, especially for pregnant women and children. The procedure typically takes between 15 to 90 minutes, depending on the area being scanned and the complexity of the examination. Patients may experience some noise from the scanner during the procedure.