Neuroimaging is a specialized branch of medical imaging dedicated to the diagnosis of neurological disease and the longitudinal assessment of brain health. The acquisition and interpretation of these studies are performed by neuroradiologists, specialists trained in the complex anatomy and pathology of the central nervous system.

Structural imaging of the brain focuses on the anatomical integrity of the brain. It is the primary modality for identifying macro-scale intracranial pathology, including primary and secondary malignancies (tumors), acute cerebrovascular accidents (CVA) and traumatic brain injuries (TBI).

Functional imaging evaluates the brain on a metabolic and physiological scale. It is utilised to diagnose neurodegenerative conditions such as Alzheimer’s disease, and to guide neurological and cognitive-psychology research. By measuring regional cerebral blood flow or metabolic rate, functional imaging allows for the direct visualization of information processing as specific cortical regions exhibit increased metabolic activity during task performance.

MRI is widely recognised as the gold standard for most musculoskeletal (MSK) and soft-tissue evaluations. This diagnostic superiority is particularly evident in neurology where MRI significantly outperforms CT in identifying the complex underlying etiologies of chronic headache and occult soft-tissue pathology

Chronic vs. acute presentations
While MRI is the definitive tool for elective or chronic presentations, Computed Tomography (CT) remains the investigation of choice in acute clinical scenarios, specifically:

• Rapid assessment of cortical bone and acute intracranial hemorrhage due to recent trauma.
• "Thunderclap" headache: Immediate screening to rule out subarachnoid hemorrhage.

Vascular imaging and diagnostic sensitivity
For specialised vascular assessments such as arterial dissection or venous sinus thrombosis, CT and MRI offer comparable diagnostic accuracy, provided dedicated CT angiography (CTA) or venography (CTV) protocols are available.

Practitioners should note that while these targeted CT techniques are highly effective for vascular-specific presentations, other potential causes of headache can be easily overlooked. In contrast, MRI’s comprehensive multi-planar sequences and superior parenchymal detail often capture secondary or incidental pathologies that a standard CT might miss, making it a definitive diagnostic tool for non-acute cases.

Read our guide for practitioners here

MRI is used to assess both the structure and the function of the central and peripheral nervous system, spine, and head and neck.