Role of MRI in unidentified focal neurological deficit. Ibrahim ARZIMAN, LCDR, MD Gulhane Military Medical Academy Department of Emergency Medicine
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1 Role of MRI in unidentified focal neurological deficit Ibrahim ARZIMAN, LCDR, MD Gulhane Military Medical Academy Department of Emergency Medicine
2 Focal neurological deficit impairments of nerve, spinal cord, or brain function that affects a specific region of the body, e.g. weakness in the left arm, the right leg, paresis, or plegia.
3 MRI Availability Expensive Takes time Claustrophobia Contraindications: pacemakers, aneurysm clips, ferromagnetic materials etc. Aphasia, depression of consciousness, or confusion - reliable history
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5 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
6 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
7 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
8 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
9 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
10 Wippold FJ, Cornelius RS, Aiken AH, Amin-Hanjani S, Berger KL, Broderick DF, Davis PC, Douglas AC, Hoh BL, Mechtler LL, Smirniotopoulos JG, Expert Panel on Neurologic Imaging. ACR Appropriateness Criteria focal neurologic deficit. *online publication+. Reston (VA): American College of Radiology (ACR); p.
11 What Does The Holy Textbook Say? For Stroke: DWI is superior to non-contrast CT or other types of MRI (T1/T2 weighted, Fluid-attenaeted inversion recovery) in the detection of acute infarction. For First Seizure: CT and suggest further imaging studies with the consulting neurologist. No MRI recommendation in CNS/Spinal Infections.
12 Diffusion Weighted MRI Brownian motion of water molecules Hyperacute phase/cytotoxic edema DWI imaging has a major role in the following clinical situations: early identification of ischemic stroke differentiation of acute from chronic stroke differentiation of acute stroke from other stroke mimics differentiation of epidermoid cyst from arachnoid cyst differentiation of abscess from necrotic tumors assessment of cortical lesions in CJD differentiation of herpes encephalitis from diffuse temporal gliomas assessment of the extent of diffuse axonal injury grading of gliomas and meningiomas (need further study) assessment of active demyelination
13 Up-to-date Literature
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22 Conclusion Focal neurologic deficits typically localize to an anatomic site within the CNS and often point to a specific etiology such as ischemic cerebrovascular disease, hemorrhage, tumor, or abscess. Neurological examination Have time/not overcrowded/availability 7/24 Diffusion weighted MRI for hyperacute phases
23 Any Questions?
Outline. Neuroradiology. Diffusion Imaging in. Clinical Applications of. Basics of Diffusion Imaging. Basics of Diffusion Imaging
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