Which imaging technique uses magnetic fields and radio waves for brain imaging?

Magnetic resonance imaging (MRI) is a highly sophisticated imaging technique that utilizes powerful magnetic fields and radio waves to produce detailed images of the brain and other internal structures of the body. The MRI process works by aligning the hydrogen atoms in the body's tissues using a strong magnetic field. When radiofrequency pulses are applied, these atoms are temporarily knocked out of alignment. As they return to their original positions, they emit signals that are captured and used to create images of the internal structures.

The advantage of MRI is its ability to provide high-resolution images without the use of ionizing radiation, making it a preferred choice for neuroimaging and evaluating brain anatomy, as well as detecting brain lesions and other abnormalities. This technique is particularly useful in diagnosing conditions such as tumors, strokes, and multiple sclerosis, as it provides a clear view of soft tissues.

In contrast, computed tomography (CT) uses X-rays to create images and is less detailed for soft tissues. Electromyography (EMG) measures electrical activity in muscles and doesn't create images of brain structures. Positron emission tomography (PET) involves injecting a radioactive tracer to detect metabolic activity in the brain, rather than focusing on structural images. These distinctions highlight why magnetic resonance imaging is the correct choice for this