Brain stereotaxis protocol (MRI)

The brain MRI stereotactic study, also known as frame-based stereotactic MRI study or conventional brain MRI stereotaxis, is a localisation MRI protocol that delineates an intracranial structure or lesion in relation to a three-dimension coordinate system allowing a precise surgical access to them. This protocol is mainly used to perform a biopsy of the brain and in some functional neurosurgeries.

The traditional frame-based study demands a compatible head-containing stereotactic system (frame and skull screws) that should be well visualised on images and must be artefact-free. Nowadays, most studies are performed as a frameless stereotactic MRI with the images further processed by specific neuronavigation software. 

Alignment must be achieved to the standard anatomical planes of the brain (e.g. parallel to Reid's baseline), allowing further image fusion and comparisons.

Note: This article is intended to outline some general principles of protocol design. The specifics will vary depending on MRI hardware and software, radiologist's and referrer's preference, institutional protocols, patient factors (e.g. allergy) and time constraints. 

Sequences

Usually:

  • T1 weighted
MRI protocols
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Article information

rID: 37528
Synonyms or Alternate Spellings:
  • Frame-based stereotactic MRI study
  • Conventional brain MRI stereotaxis
  • Frameless stereotactic MRI
  • Neuronavigation protocol

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