MR Neurography

Magnetic Resonance Neurography

1. Magnetic Resonance Neurography An innovation in neuroimaging BY MUHAMMED SWALIH MP B.Sc INTERN GANGA INSTITUTE OF HEALTH SCIENCES COIMBATORE

2. MR neurography, or magnetic resonance neurography (MRN), also known as MR Imaging of Peripheral Nerves (PNI), is an advanced technique that is useful for diagnosing disorders of the peripheral nerves beyond the spinal canal.

3. Neurography has also been helpful for improving  image diagnosis in spine disorders . It can help identify which spinal nerve is actually irritated as a supplement to routine spinal MRI. Standard spinal MRI only demonstrates the anatomy and numerous  disk bulges ,  bone spurs  or  stenosis  that may or may not actually cause nerve impingement symptoms

4. Many nerves, such as the  median  and  ulnar nerve  in the arm or the  tibial nerve  in the  tarsal tunnel , are just below the skin surface and can be tested for pathology with  electromyography , but this technique has always been difficult to apply for deep proximal nerves. Magnetic resonance neurography has greatly expanded the efficacy of nerve diagnosis by allowing uniform evaluation of virtually any nerve in the body Electromyography (EMG) is an  electro diagnostic medicine  technique for evaluating and recording the electrical activity produced by  skeletal muscles . EMG is performed using an  instrument  called an  electromyograph.

5. MR neurography can image nerves anywhere in the body. It is most commonly used in the diagnosis of abnormalities of the brachial plexus lumbosacral plexus thoracic outlet sciatic nerves.

6. C ommon nerve diseases that are evaluated with MRN . Nerve trauma  assessment of the extent of injury T umours I nflammation R adiation damage C ompression related to disc disease or entrapment. evaluation of peripheral branch nerve abnormalities and associated lesions

7. What actually done in MRN? Thin section, high-resolution sequences are performed that are dedicated to optimally increase the conspicuity of nerve tissue signal. Being able to view the nerves helps physicians to localize the site of nerve injury and diagnose the underlying etiology.

8. Patient Safety Tips Should leave valuables at home (e.g. jewellery) If prefer not to change into hospital attire (e.g. gown), please wear cotton clothing without metal zippers, hooks, or buttons. Ask before if in need of an attender. Bring a list of your current medications with dosage information.

9. a) MRN protocol A magnetic field strength of 3 Tesla is advisable to achieve high-resolution images at the fascicular level of peripheral nerves.

10. Thank ou Y HAPPY NEW EAR