A, Axial T1-weighted (700/17/1) MR image shows mild asymmetry of the lower basis pontis and middle cerebellar peduncle on the left. A, Axial T1-weighted.

Slides:

Advertisements

Similar presentations

Axial T1-weighted image after contrast administration (A) and a FLAIR image (B) demonstrating a left parietal subcortical DVA with deep venous drainage.

Advertisements

A 21-year-old man with recurrent left S1 sciatica and radiculopathy by electromyography. A 21-year-old man with recurrent left S1 sciatica and radiculopathy.

Two axial images from the same case of a facial nerve schwannoma involving the right mastoid segment of the facial nerve canal. Two axial images from the.

66-year-old woman with well-differentiated squamous cell carcinoma of lower gingiva.A, Axial T1-weighted MR image of metastatic submandibular node (arrow)

Common VW-MR imaging pitfalls.

Brain and spine MR imaging of a 48-year-old woman with Zika virus infection and encephalitis and myelitis. Brain and spine MR imaging of a 48-year-old.

Serial axial T2-weighted images (2000/110/2 at treatment, 3400/100/4 at 6 months and 4000/100/3 at 10 months and 36 months after treatment) in a 52-year-old.

The same patient as in Fig 3.

Images from the case of a 50-year-old man with cerebral hydatid disease.A–C, Sagittal spin-echo T1-weighted MR images (584/12 [TR/TE]) show a multilocular.

Patient 14. Patient 14. Secondary progressive MS. Axial contrast-enhanced T1-weighted MR image (600/27/1 [TR/TE/excitation]). A, No enhanced lesion can.

Contrast-enhanced fat-suppressed T1-weighted MR images obtained through the orbits show diffuse homogeneous thickening of the medial, lateral, and inferior.

A and B, There is asymmetric thickening, T2 hyperintensity, and contrast enhancement of the right BPL compared with that of the left side, better seen.

Patient 1, a 15-day-old neonate who presented with encephalopathy

The same patient as in Fig 3.

Axial view MR images of the head, obtained at the time of second presentation.A, T1-weighted MR image (400/15) shows thickening of the dura overlying the.

Case 2, an 82-year-old man. Case 2, an 82-year-old man. MR images of the cervical spine, obtained 4 hours after a fall, reveal a large SEH in the dorsal.

Patient 9. Patient 9. A 31-year-old man with mental status changes and seizure activity.A, T2-weighted axial MR image shows bilateral frontal and right.

MR images.A, Axial view T2-weighted MR image reveals a low intensity lesion occupying the right mastoid with associated hyperintense debris.B, Axial view.

Radiculomyelitis causing bilateral AFP and urinary retention.

Images of a 39-year-old woman who fell off a horse in July 1996.

Sagittal T1-weighted (A) and coronal T2-weighted (B) MR images show the frontoparietal intracalvarial mass lesion that was hypointense on T1-(A) and hyperintense.

Another patient with intraspinal abnormalities

Patient 12. Patient 12. A 43-year-old woman with headache, blurred vision, and mental status change.A, T2-weighted axial MR image shows bilateral centrum.

Supratentorial and posterior fossa PML

Type 1 pedicle marrow signal intensity changes associated with degenerative facet disease. Type 1 pedicle marrow signal intensity changes associated with.

Coronal (A) and axial (B) contrast-enhanced T1-weighted MR images and an axial DWI (C) and ADC map (D) in a patient with primary dural B-cell lymphoma.

A, FLAIR demonstrating acute infarct within a superficial distribution

A–C, DWI scan (A) shows acute infarction involving the left cerebellar hemisphere, which appears iso- to hyperintense on the b0 EPI scan (B). A–C, DWI.

Midline (A) and parasagittal (B) non-contrast-enhanced T1-weighted MR images (500/11/1) in a 73-year-old healthy woman show the normal high signal intensity.

Axial modified T2-weighted TSE images at 6 canonical levels of the postmortem brain stem orientated parallel to the anterior/posterior commissure plane.

A 49-year-old man with abducens nerve palsy from a partially thrombosed PICA aneurysm projecting into the brain stem. A 49-year-old man with abducens nerve.

Off-midline non-contrast-enhanced sagittal T1-weighted MR image (600/12/1) in a 48-year-old woman with breast cancer who presented with headache and fatigue.

Off-midline non-contrast-enhanced sagittal T1-weighted MR image (500/11/1 [TR/TE/excitations]) in a 25-year-old healthy man shows the normal appearance.

Patient 4: 71 year-old woman with primary angiitis of the CNS

Traumatic stump neuroma.

Axial MR images through the lower midbrain

Signal characteristics of PML

Case 3. Case 3. A and B, Contrast-enhanced T1-weighted images (spin-echo sequence with parameters of 600/14 [TR/TE]) show ringlike enhancements in the.

A–C, Sagittal T1-weighted (A), sagittal T2-weighted (B), and axial T2-weighted (C) MR images of the cervical spine in a patient with severe myelopathy.

A 50-year-old woman with nonenhancing WHO grade II diffuse astrocytoma

Patient 2. Patient 2. A 31-year-old man with fever, seizures, and weakness of the left upper extremity. DW images were superior to conventional MR images.

(A) Axial T2-weighted image obtained 2 months after a biopsy of the left cerebellar cortex (arrow) shows extensive hyperintensities in the cerebellar white.

A 63-year-old man with left L5 radiculopathy on the electromyographic study, who underwent an operation 12 months ago. A 63-year-old man with left L5 radiculopathy.

Coronal T1-weighted contrast-enhanced MR image obtained in January of 1999 at the onset of right hearing impairment shows increased enhancement of the.

A 47-year-old woman with a history of alcohol abuse presented with ataxia, changes in consciousness, and ocular abnormalities. A 47-year-old woman with.

52-year-old African-American man with seizure disorder.

A–C, Midsagittal cervical lateral T2-weighted image (2200/80/1) (A) and axial T2-weighted image (4000/90/2) through the cervical medullary junction (B)

A, Sagittal T1-weighted image demonstrates a mildly hypointense well-defined mass arising from the posterior aspect of the tongue abutting the inferior.

Sagittal midline T1-weighted (A) and coronal fluid-attenuated (B) inversion recovery (C) images demonstrate evidence of progressive cerebellar atrophy.

Case 7, 75-year-old man with history of squamous cell carcinoma of the larynx status postradiation found to have an enlarging mass in the left parotid.

MR images of the brain (axial sections, fluid-attenuated reversion recovery sequences) show the symmetric hyperintensities (arrows) involving the pyramidal.

The classic CT and MR imaging appearance of an astroblastoma in a 5-year-old female patient (patient 4).A, Axial non-contrast-enhanced CT scan shows the.

Representative quantitative maps of a patient with brain metastasis.

Axial T2-weighted MR image shows normal flow void in the right internal jugular vein (arrows), whereas flow-related enhancement can be seen in the left.

MR images of a 52-year-old man obtained 1 year and 3 months after surgery.A, A 3-mm-thick FSE T2-weighted image obtained at the level of the middle cerebellar.

MR images in a 69-year-old woman with cervical and thoracic back pain.

MR images of patient 1.Pre- (A) and postcontrast (B) T1-weighted images reveal a homogeneously hypointense (compared with the pons) mass located in the.

A, Axial T1- weighted MR image shows a predominantly isointense lesion in the right parietal bone. A, Axial T1- weighted MR image shows a predominantly.

Conventional MR image findings in acute-stage ANE in 2-year-old-girl.

A, T2-weighted coronal image shows a soft-tissue mass of intermediate signal intensity in the left posterior nasal cavity.B, Postcontrast T1-weighted axial.

MR images of the cervical spine

Patient 2. Patient 2. Additional MR images.A–C, Follow-up image (A) obtained 15 days after surgical intervention shows reduced size of the abscess cavity.

Persistent diffusion abnormalities in the brain stem of patient 2.

A–C, Axial T2-weighted images 7 days after the ictus, demonstrating punctate hyperintensities throughout the white matter, on a background of slightly.

A 19-year-old man with a nonenhancing WHO grade III anaplastic astrocytoma. A 19-year-old man with a nonenhancing WHO grade III anaplastic astrocytoma.

CNS VZV–IRIS (same patient as in Fig 3).

Cavernoma/telangiectasia.

Chronic CNS-IRIS without coinfection.

A 73-year-old woman with well-differentiated SCCA of the lacrimal sac and nasolacrimal duct. A 73-year-old woman with well-differentiated SCCA of the lacrimal.

A 21-year-old woman with a right sensory-motor deficit and aphasia for 60 minutes. A 21-year-old woman with a right sensory-motor deficit and aphasia for.

Presentation transcript:

A, Axial T1-weighted (700/17/1) MR image shows mild asymmetry of the lower basis pontis and middle cerebellar peduncle on the left. A, Axial T1-weighted (700/17/1) MR image shows mild asymmetry of the lower basis pontis and middle cerebellar peduncle on the left. Note the geographic region of subtle hypointensity centrally and to the left of midline and questionable punctate hyperintense foci near the midline. B, Axial T2-weighted (2200/90/1) image showing abnormal hyperintensity within the left ventral portion of the brain stem at the level of the inferior cerebellar peduncle/medulla. This focus is slightly caudal to the region of hypointensity seen in figure 1B.C, Post-gadolinium T1-weighted (700/19/1) axial image reveals homogeneous enhancement within the rostral pons and adjacent cerebellar peduncles. The magnitude of contrast enhancement is disproportionately greater than the focal signal changes seen on the T2-weighted images (see figure 1B). Daniel C. Huddle et al. AJNR Am J Neuroradiol 1999;20:1674-1677 ©1999 by American Society of Neuroradiology