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MRI SECTIONAL ANATOMY OF BRAIN
 

MRI SECTIONAL ANATOMY OF BRAIN

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  • . Internal Carotid ArteryInternal Auditory Canal
  • Usually cystify and develop firm borders
  • New strokes usually show up as white on T2.
  • Usually cystify and develop firm borders
  • Glios are rapid growing and cause death by brain compression. They do not usually metastasize, but occasionally can following debulking surgery.
  • Some believe cranium too small for brain, Others believe the foramen magnum is malformed. Symptoms of headache, ataxia and nystagmus with progressive pressure on brain stem
  • Bi-temporal distribution is typical. Thought to occur by re-activation of herpes virus much like “cold sores” except through different nerve distribution

MRI SECTIONAL ANATOMY OF BRAIN MRI SECTIONAL ANATOMY OF BRAIN Presentation Transcript

  • Sectional Anatomy of Brain Vipin kumar Msc medical imaging
  • APPROACH TO STUDY OF BRAIN ANATOMYSKULL VAULT, BASE & SUTURES.MENINGES.BRAIN PARENCHYMA.CSF SPACES & CISTERN
  • SKULL VAULT
  • MENINGES DURAMATER : ARACHNOID MATER PIAMATER outer periosteal layer & inner meningeal layer
  • MENINGEAL FOLDS DURAL REFLECTIONS DURAL VENOUS SINUSES FALX CEREBRI B/W TWO DURAMATERS TENTORIUM CEREBELLIFALX CEREBELLIDIAPHRAGMATIC SELLA
  • BRAIN FOREBRAIN (PROSENCEPHALON) Telencephalon – Cerebral hemispheres. Diencephalon - Epithalamus, Thalamus, Hypothalamus and Sub thalamus. MIDBRAIN ( MESENCEPHALON ) HINDBRAIN ( RHOMBENCEPHALON) Metencephalon – pons and cerebellum. Myelencephalon – medulla.
  • CEREBRAL HEMISPHERES Outer gray matter : the cerebral cortex. inner white matter : centrum semiovale. Divided into lobes by four important sulci: Lateral (Sylvain fissure) Central (Rolandic fissure) Parieto - occipital and Calcarine sulcus.
  • LOBES OF BRAIN
  • CORPUS CALLOSUM: Thick band of white matterconnecting two hemispheres.BASAL GANGLIA : central gray matter of telencephalonconsisting of lentiform nucleus, caudate nucleus,claustrum & amygdala.INTERNAL CAPSULE: Thick white matter band lyingbetween caudate nucleus, thalamus & lentiform nucleus.
  • Trunk/bodyGenu of cc splenium rostrum
  • MIDBRAIN (MESENCEPHALON)Smaller dorsal part - TECTUMLarger ventral part - CEREBRAL PEDUNCLESInterpeduncular fossa/cistern separate twopedunclesEach cerebral peduncle - CRUS & TEGMENTUM OF MIDBRAIN
  • Mid brain
  • HINDBRAIN PONS & MEDULLA OBLONGATA anteriorly CEREBELLUM posteriorly The fourth ventricle is present between the pons-medulla &cerebellum
  • CSF SPACES LATERAL VENTRICLES (telencephalon) Foramina of monro THIRD VENTRICLE (diencephalon) Aqueduct of sylvius(MB) FOURTH VENTRICLE (hindbrain) Foramina of luschca & magendie FINALLY INTO THE SUBARACNOID SPACE
  • SUBARACHNOID CISTERNSVENTRAL (median & paramedian)PerimedullaryPrepontineSuprasellarCp angleDORSAL (median & paramedian)Cisterna magnaAmbient CisternSupracerebellarQuadrigeminalInterhemispheric
  • . Maxillary Sinus . Nasopharynx Post Contrast sagittal T1 Weighted M.R.I. Section at the level of Foramen . Cervical Cord Magnum Cisterna Magna. Mandible Post Contrast Axial MR Image of the brain
  • Post Contrast sagittal T1 Wtd M.R.I. Section at the level of medulla Sigmoid Sinus MedullaFig. 1.2 Post Contrast Axial MR Image of the brain
  • Cavernous Sinus ICA Basilar Artery Post Contrast sagittal T1 Wtd Pons M.R.I.TMPlobe IV Ventricle Section at the level of Pons IAC MCP Vermis Cerebellar Hemisphere
  • Orbits midbrain Aqueduct of Sylvius Post Contrast sagittal T1 Wtd M.R.I. Section at the level of Mid BrainMiddle Cerebral Artery Posterior Cerebral Artery Post Contrast Axial MR Image of the brain
  • Sylvian Fissure Frontal lobe III Ventricle Post Contrast sagittal T1 Wtd M.R.I. Section at the level of the III Ventricle Occipital LobeTemporal Lobe Fig. 1.5 Post Contrast Axial MR Image of the brain
  • fontal Lobe Frontal Horn caudate Nucleus. Putamen . Internal Cerebral VeinInternal Capsule Choroid Plexus within the Post Contrast sagittal T1 Wtd occipital horn M.R.I. Section at the level of Thalamus Occipital LobeTemp Lobe Thalamus Superior Sagittal Sinus Fig. 1.6 Post Contrast Axial MR Image of the brain
  • Genu of corpus callosum Choroid plexus within the body of lateral ventricle Post Contrast sagittal T1 Wtd M.R.I. Section at the level of Corpus Callosum Splenium of corpus callosum
  • Frontal Lobe Body of the Corpus Callosum Post Contrast sagittal T1 Wtd M.R.I. Section at the level of Body of Corpus Callosum Parietal LobePost Contrast Axial MR Image of the brain
  • Frontal Lobe Post Contrast sagittal T1 Wtd M.R.I. Section above the Corpus Callosum Parietal LobePost Contrast Axial MR Image of the brain
  • Corpous collusm pons 4 th ventricle medulla Brainstem
  • Splenium of CCTegmentum of Midbrain Tectal Plate of Midbrain 4th Ventricle
  • Scalp fat Internal cerebral vein Superior sagittal sinus . Bone Inferior sagittal sinus Parietal lobeCorpus callosum Vein of Galen Occipital lobe Mass intermedia of thalamus Straight sinus . Vermis . IV ventricle Cerebellar tonsil
  • Frontal Sinus Clivus Tongue
  • Superior Saggital SinusT2 CornoalMRI Sylvian Fissure Hippocampus Temporal Lobe
  • Coronal section Falx cerebriLat ventricle Tentorium 4 th ventricle
  • Choroid plexus within lateral ventriclePosterior frontal lobe Cerebellar . Posterior temporal hemisphere lobe Tentorium Superior vermis Cerebellar tonsil Coronal Section of the Brain at the level of IV Ventricle Post Contrast Coronal T1 Weighted MRI
  • Frontal lobe Corpus callosum Frontal horn III Caudate nucleusPituitary gland Optic nerve sp Pituitary stalk Internal carotid artery np Cavernous sinus Coronal Section of the Brain at the level of Pituitary gland Post Contrast Coronal T1 Weighted MRI
  • PATHOLOGIS
  • whole R. hemispherical infarct
  • bleed into brain stem
  • Old stroke
  • New stroke in T2 flair
  • DWI showing stroke
  • accumulated blood mpgrT2 flair
  • Cerebral abscesses from endocarditis
  • Glioblastoma Multiforme
  • Giant meningioma
  • Chiari malformation
  • Herpes encephalitis
  • Hydrocephalus
  • giant unruptured MCA aneurysm
  • T2 Axial MRI with Developmental Delay and Epilepsy