uses magnetic fields and radio waves to produce high quality two- or three-dimensional images of brain structures without use of ionizing radiation (X-rays) or radioactive tracers. Magnetic resonance imaging (MRI) of the brain and brain stem
One advantage of MRI of the brain over
computed tomography of the head is better tissue contrast, and it has fewer artifacts than CT when viewing the [1 ] brainstem. MRI is also superior for pituitary imaging. It may however be less effective at identifying early [2 ] cerebritis. [3 ]
In analysis of the fetal brain, MRI provides more information about gyration than
ultrasound. [4 ]
A number of different imaging modes can be used with imaging the brain:
T 1: Cerebrospinal fluid is dark. T 1 weighting is useful for visualizing normal anatomy.
T 2: CSF is light, but fat (and thus white matter) is darker than with T 1. T 2 is useful for visualizing pathology. [5 ] PD (proton density): CSF has a relatively high level of
protons, making CSF appear bright. Gray matter is brighter than white matter. [6 ]
FLAIR: useful for evaluation of white matter plaques near the ventricles. It is useful in identifying [7 ] demyelination. [8 ]
Gallery [ edit ]
References [ edit ]
^ Ebel, Klaus-Dietrich; Benz-Bohm, Gabriele (1999). . Thieme. pp. 538–. Differential diagnosis in pediatric radiology ISBN 978-3-13-108131-5 . Retrieved 18 July 2011.
^ Bradley, William G.; Brant-Zawadzki, Michael; Cambray-Forker, Jane (2001-01-15). . Surendra Kumar. MRI of the brain ISBN 978-0-7817-2568-2 . Retrieved 24 July 2011.
^ Roos, Karen L.; Tunkel, Allan R. (2010). . Elsevier Health Sciences. pp. 69–. Bacterial infections of the central nervous system ISBN 978-0-444-52015-9 . Retrieved 18 July 2011.
^ Garel, Cathérine (2004). . Springer. MRI of the fetal brain: normal development and cerebral pathologies ISBN 978-3-540-40747-8 . Retrieved 24 July 2011.
^ Butler, Paul; Mitchell, Adam W. M.; Ellis, Harold (2007-11-19). . Cambridge University Press. pp. 12–. Applied Radiological Anatomy for Medical Students ISBN 978-0-521-81939-8 . Retrieved 18 July 2011.
^ Tofts, Paul (2005-09-01). . John Wiley and Sons. pp. 86–. Quantitative MRI of the Brain: Measuring Changes Caused by Disease ISBN 978-0-470-86949-9 . Retrieved 18 July 2011.
^ Chowdhury, Rajat; Wilson, Iain; Rofe, Christopher; Graham Lloyd-Jones (2010-04-19). . John Wiley and Sons. pp. 95–. Radiology at a Glance ISBN 978-1-4051-9220-0 . Retrieved 18 July 2011.
^ Granacher, Robert P. (2007-12-20). . CRC Press. pp. 247–. Traumatic brain injury: methods for clinical and forensic neuropsychiatric assessment ISBN 978-0-8493-8138-6 . Retrieved 18 July 2011.