imagingMRI
Magnetic resonance imaging (MRI) is a medical imaging modality that uses strong magnetic fields and radiofrequency pulses to produce detailed pictures of internal anatomy. Unlike X-ray–based techniques, MRI does not rely on ionizing radiation, enabling repeated imaging with excellent soft-tissue contrast.
Principle: A large external magnet aligns hydrogen protons in the body. Radiofrequency pulses disturb this alignment;
Equipment and techniques: MRI systems typically operate at 1.5 to 3 tesla. Imaging uses coils to transmit
Applications: MRI provides high-resolution images of the brain and spinal cord, joints and musculoskeletal tissues, and
Safety and limitations: MRI requires screening for implants or devices that are unsafe in a magnetic field.
Advances: Ongoing improvements include faster scan methods, higher-field systems, and quantitative MRI biomarkers that standardize measurements