NEUROIMAGING or brain imaging is the use of various techniques to either directly or indirectly image the structure, function/pharmacology of the nervous system. It is a relatively new discipline within medicine, neuroscience, and psychology.
MRI is the investigative tool of choice for neurological cancers, as it has better resolution than CT and offers better visualization of the posterior fossa. The contrast provided between grey and white matter makes it the best choice for many conditions of the central nervous system, including demyelinating diseases, dementia, cerebrovascular disease, infectious diseases and epilepsy. Since many images are taken milliseconds apart, it shows how the brain responds to different stimuli; researchers can then study both the functional and structural brain abnormalities in psychological disorders. MRI is also used in mri-guided stereotactic surgery and radiosurgery for treatment of intracranial tumors, arteriovenous malformations and other surgically treatable conditions using a device known as the N-localizer. |
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Ethical dilemmas generated by neuroimaging do not just lie in the production of these images. Just as many, if not more, of the dilemmas arise from the limitations in interpreting results and accurately conveying them to the public. When sharing the results of neuroimaging, neuroethicists must address topics such as privacy of unspoken thought and decision-making. Assignment of personal responsibility must be redefined and our concept, of how a "healthy" brain should look and function will be transformed.