A–C, DWI scan (A) shows acute (hyperintense) infarction in the left frontal region. A–C, DWI scan (A) shows acute (hyperintense) infarction in the left.

Slides:

Advertisements

Similar presentations

Representative anatomic T2W images (A and D) and MTR (B and E) and ihMTR (C and F) maps obtained on a control subject and a patient with RRMS after step.

Advertisements

123I/Tc-99m sestamibi subtraction scan (top left); neck sonogram in region of cystic mass (top right); axial arterial phase CT scan (bottom left); and.

Type 1 pedicle marrow signal intensity changes associated with an early to progressive pars fracture and absence of signal intensity changes in a terminal.

MR images in different patients with SIFs

A–C, Case 5. A–C, Case 5. Axial CT images at 1 month after birth show bilateral frontal and parietal calcifications (arrows). D–F, These calcifications.

Diffusion-weighted (TR = 3900, TE = 94, B = 1000, number of gradient directions = 90) imaging (A) with corresponding apparent diffusion coefficient map.

A–C, DWI san (A) at the level of the atria of the lateral ventricles reveals areas of acute (hyperintense) infarction in the frontoparietal region and.

A, A 50-year old female patient with acute ischemic stroke (AIS), visible as an area of reduced diffusion (dark region) on the apparent diffusion coefficient.

A 48-year-old man with a cerebral metastasis from a hepatocellular carcinoma. A 48-year-old man with a cerebral metastasis from a hepatocellular carcinoma.

63-year-old patient with right hemiparesis.

Axial CT images at the basal ganglia level show subarachnoid hemorrhage on the right and a chronic lacunar infarct on the left. Axial CT images at the.

Representative case with region of interest on globus pallidus (arrow)

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.

Nonenhanced sagittal T1-weighted MR image (500/11/1) in a 37-year-old woman with AIDS and chronic anemia (hemoglobin level, 8.2 mg/dL) shows diffuse abnormal.

T2-weighted images of a patient with an infarction within the anterior MCA branch territory on day 5 (patient 15) show high SI changes within the ipsilateral.

Type 1 pedicle marrow signal intensity changes and associated soft tissue hyperintensity on T2- and STIR-weighted sequences associated with pars fractures.

An acute stroke patient with severe stenosis of the left internal carotid artery. An acute stroke patient with severe stenosis of the left internal carotid.

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.

Cardioembolic stroke in the left MCA, 2 hours after onset.

Images of a 20-year-old man who was a passenger in a traffic accident in May 1999; he had not been wearing a seat belt. Images of a 20-year-old man who.

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.

A 74-year-old man who presented to the emergency department after a fall with left-sided weakness. A 74-year-old man who presented to the emergency department.

Single voxel spectroscopy.

A–I, Matching T1-weighted, T2-weighted, and FLAIR images from three patients ages 5 weeks (A–C), 8 months (D–F), and 3 years (G–I). A–I, Matching T1-weighted,

Involvement of the frontal and parietal lobes in patients with isolated cortical hyperintensities. Involvement of the frontal and parietal lobes in patients.

T2-weighted, PD-weighted, FLAIR, and DWI images showing cortical abnormalities in the right parietal lobe; FLAIR and DWI also show abnormalities in the.

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

A 58-year-old woman with left-sided weakness.

An oligodendroglioma in the right frontoinsular region.

A 44-year-old woman with a history of anxiety disorder presenting with acute right facial weakness and expressive aphasia. A 44-year-old woman with a history.

A 31-month-old child with a suspected abusive head trauma with a subdural hematoma (not shown) found to have subarachnoid hemorrhage in the sulci of the.

Pial vasodilation. Pial vasodilation. A, Axial GRE T2 image shows a left frontal sulcal SAH (black arrowhead), possibly located in the “watershed” territory.

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.

Conventional GE magnitude images show both calcifications and hemorrhage as areas of hypointense signal intensity. Conventional GE magnitude images show.

Coronal T2 (A) and axial TI FLAIR (B), ADC (C), and T2 (D) MR images of a 21-day-old boy. Coronal T2 (A) and axial TI FLAIR (B), ADC (C), and T2 (D) MR.

Coronal T2 (A), axial T1 (B), ADC (C and D), and SWI (E and F) MR images of a 7-day-old girl. Coronal T2 (A), axial T1 (B), ADC (C and D), and SWI (E and.

Axial T2-weighted MR images

Orbital cellulitis related to mucormycosis (A–C) and bacterial infection (D–F). Orbital cellulitis related to mucormycosis (A–C) and bacterial infection.

Typical supratentorial right frontal cPML in an HIV-positive patient.

T2-weighted (A), FLAIR (B), and isotropic DWI (C) of a unilateral lesion in a patient with an acute or chronic presentation of worsening right-sided weakness.

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.

Case 4: 74-year-old man with sudden left paresthesia.

Graph of neurologic scores (mean ± SD) for the moderate-severe VSPdelayed group, mild VSPdelayed group, and sham group. Graph of neurologic scores (mean.

Signal characteristics of PML

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, Diffusion-weighted image (TR, 10 seconds; TE, 94

Orbital amyloidoma in a 32-year old woman with a slowly increasing mass in the right orbit and generalized bone pain. Orbital amyloidoma in a 32-year old.

Orbital lymphoma (A–C) compared with OIS (D–F).

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

Axial CT images at the centrum semiovale level show a small left frontal hemorrhage corresponding to shear injury. Axial CT images at the centrum semiovale.

Images from the case of an 8-year-old female patient with complex I mitochondrial disease, which was diagnosed when the patient was older than 3 years.

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.

A–C, FLAIR (TR/TE, 9002/149. 5), DWI (10000/105

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

A 32-year-old male patient with relapsing-remitting MS with several lesions, including 2 contrast-enhancing juxta-/intracortical lesions in the left frontal.

Typical disease course of cPML in an HIV-positive patient receiving HAART. Top panel, a set of images at presentation with focal diffusion restriction.

Case 1: 54-year-old man with atrial fibrillation and sudden onset of left-sided hemiparesis. Case 1: 54-year-old man with atrial fibrillation and sudden.

A 55-year-old man presenting with acute altered mental status, right facial droop, and right upper extremity weakness and witnessed generalized tonic-clonic.

Longitudinal T1-weighted spin-echo signal-intensity changes in the DN (A–C) and GP (D–F) in a female patient with MS after receiving 0 (A and D), 1 (B.

Case 1: Axial DWI through the maxillary sinus level demonstrates high signal intensity within the affected left maxillary sinus (black asterisk) compared.

Number of white streaks for the cobalt-containing alloy (upper, black lines) and titanium clips (lower, white lines) scanned in high mode (H) (open symbols,

Signal intensity time curves of gradient-echo (GRE) and spin-echo (SE) echo-planar imaging sequences. Signal intensity time curves of gradient-echo (GRE)

T2 shinethrough artifact in DWI

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.

Brain MR imaging 2 hours after onset of symptoms

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

Axial DWIs at the level of the corona radiata obtained at 2 different time points (A and B) show recurrent periventricular infarcts. Axial DWIs at the.

Scatterplot of the log of infarct signal intensity on DW images versus the log of hours from symptom onset. Scatterplot of the log of infarct signal intensity.

A, Baseline DWI, RMHV on GRE-T2

Presentation transcript:

A–C, DWI scan (A) shows acute (hyperintense) infarction in the left frontal region. A–C, DWI scan (A) shows acute (hyperintense) infarction in the left frontal region. On b0 EPI sequence (B) the infarction is relatively hyperintense but somewhat heterogeneous in intensity (scored as negative for hemorrhage on blinded review). The GRE scan (C) clearly shows a hypointense hemorrhagic component within the infarction Doris D. M. Lin et al. AJNR Am J Neuroradiol 2001;22:1275-1281 ©2001 by American Society of Neuroradiology