Temporal Lobe MRI Protocol

Temporal Lobe MRI Sequences

• Normal Scout/Localiser
• Sagittal Scout 3 sagittal FLASH images to help identify the line of the hippocampal grey matter.
• PD + T2 AXIAL 
• T1 Isotropic MP-Rage (sagittal acquisition)
• T2 TSE Coronal 
• FLAIR Coronal 

Optional Sequences

• True IR Coronals
• True IR Axials

PD + T2 AXIAL Turbo spin echo (TSE) axials. 5 mm thick with 50% gap

Position slices parallel to the line joining the Genu and Splenium of the Corpus Callosum.

Cover the brain from below the Foramen Magnum to the Vertex.

Sat band just below inferior slice and parallel to the slices

T1 Isotropic MP-Rage (sagittal acquisition)

Run and create MPRs in the coronal and axial planes relative to the Hippocampus (see below)

T2 TSE Coronal 3 mm slices 0.65mm resolution

Position perpendicular to the line of the Hippocampal grey matter, cover form the anterior temporal horn to the abutment of the Hippocampus and the corpus callosum

FLAIR Coronal 5 mm slices 0.9 mm resolution FOV 230 mm

Position perpendicular to the line of the Hippocampal grey matter, cover form the anterior temporal horn to the abutment of the Hippocampus and the corpus callosum

Optional Sequences

True IR Coronals

Position perpendicular to the line of the Hippocampal grey matter, cover form the anterior temporal horn to the abutment of the Hippocampus and the corpus callosum

True IR Axials

Position parallel to the line of the Hippocampal grey matter.

   TEMPORAL LOBE STUDY

Intended to detect temporal lobe lesions which are likely to be the root course of complex partial seizures which have not responded to medication. The films may provide planning information for partial or full temporal lobectomy. Lesions could include tumour, scar, infarct, miscellaneous gliotic change or mesial temporal sclerosis. The examination must also screen for other lesions in the brain.

Typical Indications

Temporal lobe epilepsy (TLE)

Complex partial seizures (CPS)

Mesial temporal sclerosis (MTS)

Short term memory loss (STM)

Partial seizures

Temporal focus on EEG

  Orthodontic Braces 
These are common in young TLE patients and will create substantial artefact even in axial views of the temporal lobes. Use the low susceptibility T1 sequence. 
You may need to repeat the sequence with half the acquisitions, 100% phase oversampling, and the phase running S-I to shift braces artefact from the temporal lobes as the standard T1 uses a very low bandwidth.




READ MORE CLICK THE FOLLOWING LINKS:


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