Advantage And Disadvantages Of MRI Scan

Faculty of Health Sciences CONTENT

1. Introduction (What is MRI scan?)

2. Advantages and Disadvantages of MRI scan

3. MRI Brain stroke

4. MRI Brain protocol

5. Patient preparation

6. Case study of MRI stroke

WHAT IS MRI SCAN

MRI (Magnetic resonance imaging) scan is a great medical diagnostic tool that uses a magnetic field to produce high-quality, images in multiple planes or directions. The images are generated using superconducting magnets and pulsed radio waves. Magnetic resonance imaging uses non ionizing radiation, unlike CT which uses radiation. It’s useful for detecting tiny changes of structures within the body. MRI is useful test used for detect changes in brain tissue and damage to

Brain stroke is an acute disease occurs when no blood flow to the brain because of blood clot. When the Stroke happen, brain cells begin to diem approximately after 8 hours from the time stroke start, because they stop receiving the oxygen and nutrients they need to function.

MRI (magmatic resonance imaging) used instead of, or in addition to, a CT scan to diagnose a stroke. (MRI) is preferred to use because it used to detect early ischemic lesions with high sensitivity, and it delineate the presence, size, location, extent and effects of acute brain stroke. In addition to that MRI usefull to identify the hypoperfused tissue that is at risk of infarction, and show additional features of the cerebrovascular pathology.

MRI BRAIN PROTOCOL

Imaging protocols for the brain should meet several criteria, they must address the clinical questions to be answered and provide all the required information, MRI protocol must be as short as possible (to minimize the time the patient has to spend in the magnet and optimize patient

Her previous medical history was notable for hyperthyroidism and a curative remote mastectomy for breast cancer. The patient was on two antihypertensive medications and a statin, and she was not receiving any antiplatelet medication. She was taken by ambulance to a primary stroke center. Initial examination showed global aphasia, right homonymous hemianopia, right hemiplegia, and hemisensory loss.

Investigations Physical examination, laboratory tests, noncontract head CT scan, multimodal brain MRI scan, catheter cerebral angiogram, echocardiogram, continuous cardiac monitoring.

Diagnosis Acute ischemic stroke caused by distal left internal carotid artery occlusion, with salvageable penumbral tissue and a persistent large-vessel occlusion.

Management Neuroprotective study agent (total dose of 20 g intravenous MgSO4 or matched placebo), intravenous tissue plasminogen activator, rescue mechanical thrombectomy using the Merci® clot retrieval