OCR General Certificate of Secondary Education (GCSE) Biology Practice Exam

Why is MRI considered a preferable method for brain scanning?

1. It uses electrical signals for imaging

2. It provides clearer images without invasiveness

3. It requires exposure to radiation

4. It triggers neural activity before scanning

The correct answer is: It provides clearer images without invasiveness

MRI, or Magnetic Resonance Imaging, is considered a preferable method for brain scanning primarily because it provides clearer images without invasiveness. This technology uses strong magnetic fields and radio waves to generate detailed images of the brain and other soft tissues in the body, which allows for high-resolution imaging of structures and abnormalities. One of the significant advantages of MRI is that it does not involve exposure to ionizing radiation, unlike other imaging techniques such as X-rays or CT scans. This aspect is particularly important for protecting patient health, especially when multiple scans may be necessary over time or for vulnerable populations, such as children or individuals requiring frequent monitoring. Additionally, the clarity of the images produced by MRI allows for accurate diagnosis and better visualization of conditions such as tumors, brain injuries, and diseases affecting the brain. The non-invasive nature of MRI means that it does not require any surgical procedures or incisions, which further enhances its safety and patient comfort. By utilizing magnetic fields rather than invasive methods or harmful radiation, MRI stands out as a superior choice for brain imaging.