Pictorial Review: Extracranial Enhancement on Black-Blood Brain MRI

Area of Science:

• Radiology
• Medical Imaging
• Neuroimaging

Background:

• 3D contrast-enhanced T1W black-blood imaging is the standard for intracranial vessel wall imaging in vasculitis.
• It demonstrates high sensitivity for detecting brain and meningeal lesions.

Purpose of the Study:

• To highlight the diagnostic value of 3D contrast-enhanced black-blood MRI for extracranial pathology.
• To review technical principles and illustrate extracranial findings with representative cases.

Main Methods:

• Review of technical principles of black-blood imaging sequences.
• Analysis of expected and unexpected extracranial findings.
• Illustration through representative cases of orbital, ENT, and head and neck pathologies.

Main Results:

• 3D black-blood MRI provides high anatomical detail and contrast-to-noise ratio, facilitating extracranial pathology detection.
• The technique can identify orbital (optic neuropathies, thyroid eye disease, tumors), ENT (mastoiditis, sinusitis, salivary gland disease, perineural tumor spread), and head and neck musculoskeletal abnormalities (synovitis, bone marrow changes).

Conclusions:

• 3D contrast-enhanced black-blood MRI offers significant diagnostic value beyond intracranial applications.
• Broader clinical use in brain MRI protocols is encouraged for detecting relevant extracranial pathology.