Medical scans for brain and spine conditions: What patients need to know

Medical scans play an essential role in diagnosing conditions that affect the brain and spine. Many patients who visit the London Neurosurgery Partnership either require imaging as part of their assessment or have already undergone scans before their consultation.

Doctors use medical scans to understand better what is happening inside the body. Different types of medical scans work in different ways. Some use low levels of radiation, while others rely on sound waves, radio waves or magnets. Each scan provides unique information that helps specialists diagnose conditions and plan the most appropriate treatment.

Why medical scans are important

Medical scans allow specialists to assess bones, soft tissues, nerves and blood flow. This detailed imaging helps consultants identify issues such as fractures, tumours, spinal cord compression or disc problems.

Medical scans support:

• Accurate diagnosis
• Treatment planning
• Monitoring existing conditions
• Assessing recovery after treatment or surgery

Your consultant will recommend the most suitable medical scan depending on your symptoms and medical history.

X-ray

X-rays are one of the oldest and most widely used forms of medical imaging. Specialists have used X-rays for over 120 years to assess bones and certain tissues.

An X-ray uses a small amount of radiation to create images of the body. Dense structures, such as bones, block the X-ray beam more effectively, allowing fractures or abnormalities to appear clearly on the scan.

Doctors commonly use X-rays to:

• Diagnose fractures or bone injuries
• Assess spinal alignment
• Monitor structural changes in the spine

Although X-rays involve radiation, the exposure remains very low and is considered safe for routine clinical use.

CT scans

CT scans, also known as computed tomography scans, use rotating X-ray beams to create highly detailed cross-sectional or 3D images.

Because CT scans produce more detailed images than standard X-rays, specialists often use them in emergency settings where rapid diagnosis is important. CT scans can quickly identify issues such as trauma, fractures or bleeding.

Medical teams commonly use CT scans for:

• Emergency brain or spine assessment
• Complex fractures
• Structural abnormalities
• Surgical planning

Modern CT technology minimises radiation exposure while maintaining excellent diagnostic quality.

MRI scans

MRI scans use strong magnets and radio waves rather than radiation, making MRI particularly effective for examining soft tissues, including discs, nerves, the spinal cord, and the brain.

MRI scans often help diagnose:

• Disc herniation
• Spinal cord compression
• Tumours
• Blood flow abnormalities
• Neurological disorders

Patients must remain still during the scan to ensure clear imaging. Because MRI produces highly detailed soft-tissue images, consultants frequently choose this scan when investigating chronic pain, nerve symptoms, or suspected neurological conditions.