[Studying cerebral perfusion using magnetic susceptibility techniques: technique and applications].

Area of Science:

• Neuroimaging
• Radiology
• Medical Physics

Context:

• Perfusion MRI assesses cerebral microvasculature via tracer-induced signal changes.
• Common techniques utilize gadolinium contrast in T2*-weighted sequences.
• Key evaluated parameters include cerebral blood volume (CBV), cerebral blood flow (CBF), and mean transit time (MTT).

Purpose:

• To detail the technical aspects and clinical applications of perfusion MRI.
• To highlight the importance of sequence selection, contrast agent administration, and potential error sources.
• To provide an overview of perfusion MRI's role in neuro-oncology and cerebrovascular disease.

Summary:

• Perfusion MRI evaluates brain microvasculature by tracking contrast agent passage.
• Technical factors (sequence, contrast dose/speed) and blood-brain barrier permeability are critical.
• Clinical uses include glioma grading, tumor differentiation, and acute ischemic stroke assessment.

Impact:

• Enhances understanding of cerebral hemodynamics and microvascular integrity.
• Improves diagnostic accuracy for brain tumors and ischemic events.
• Facilitates personalized treatment strategies in neuro-oncology and stroke management.