A–C, Thin-section (1-mm) coronal and axial CT images of the skull base obtained with an edge-enhancing bone algorithm show enlargement (arrows) of the.

Slides:



Advertisements
Similar presentations
Color pressure maps (mm Hg) in a healthy subject in the axial (A) and coronal (D) planes as well as for a patient (C and F) with a type IIa DAVF affecting.
Advertisements

A 50-year-old man with MD. Axial thin-section CT image shows decreased distance between the vertical limb of the posterior semicircular canal and the posterior.
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.
A 30-year-old man with PSA
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.
Case 1. Case 1. CT scans in an 8-year-old boy with an ectopic tooth in the left nasal cavity.A, Coronal scan obtained with a bone window setting of 600-HU.
Subsidence of LT-CAGE devices at L5–S1.
Thin-section (2.5-mm) axial T1-weighted spoiled gradient-echo gadolinium-enhanced images of the brain obtained at 1.5 T for Gamma knife localization (trigeminal.
Demonstration of a bilaterally duplicated hypoglossal canal.
Normal progression of interbody fusion in a 28-year-old woman.
Intraosseous temporal bone meningioma in a 45-year-old woman who presented with left-sided hearing loss and tinnitus. Intraosseous temporal bone meningioma.
Two coronal views of the same case, demonstrating the aggressive appearing imaging features of mastoid segment FNSs. The left coronal T1-weighted postcontrast-enhanced.
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.
MRN technique. 3T MR neurography imaging sequences with isotropic multiplanar reconstruction. 3D T2 SPACE with multiplanar reconstruction of the cervical.
A, Axial source image from a contrast-enhanced MRA unambiguously demonstrates a tiny (
Case 1, extranodal orbital involvement in Rosai-Dorfman disease.
A 7-month-old boy with left hemimegalencephaly
Intracranial hypertension in a 30-year-old woman presenting with headaches and tinnitus. Intracranial hypertension in a 30-year-old woman presenting with.
Coronal gadolinium-enhanced T1-weighted image (TR/TE/NEX, 500/15/2) at the level of the foramen ovale shows a significantly enhancing V3 branch (arrow)
Coronal gadolinium-enhanced T1-weighted image (TR/TE/NEX, 500/15/2) illustrates the normal appearance of V3 as it exits the skull base through the foramen.
MR images obtained through the pituitary gland show diffuse enlargement of the pituitary gland. MR images obtained through the pituitary gland show diffuse.
Axial CT sections involving vital structures of the temporal bone.
AP (A) and lateral (B) radiographs demonstrating a discontinuous segment of the catheter, with broken catheter ends in the subcutaneous tissue of the lower.
A, Axial CT of a patient with bilateral DON and lack of fat prolapse through the superior ophthalmic fissure. A, Axial CT of a patient with bilateral DON.
High resolution bone algorithm CT scans.
A and B, Axial and coronal high-resolution CT images of the larynx in a 73-year-old patient with papillary thyroid cancer and left vocal cord paralysis.
Bony cochlear nerve canal atresia in a patient with CND
Optic glioma.A, Sagittal spin-echo image (TR, 643 ms; TE, 12 ms) shows markedly enlarged optic nerve (arrow).B, Axial fast spin-echo (TR, 6000 ms; TE,
Two different cases of FNS, both coronal plane bone algorithm CT images show significant enlargement of the tympanic segment of the facial nerve with the.
EACC with intramural bone fragments.
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, Axial non-enhanced CT scan (soft-tissue algorithm) shows a heterogeneous right temporal bone lesion, with cortical thinning and bone remodeling of the.
Benign peripheral nerve sheath tumor of the sciatic nerve shows the typical split fat sign (arrow) on coronal T1 (A), target sign (short arrow) on coronal.
CT scans obtained 2 months later
Axial CT image through L5/S1 (3-mm section, 100 KVp, 50 mA).
Axial T2-weighted MR imaging at the level of the internal auditory canals, demonstrating a large, homogeneous mass filling the right internal auditory.
A, A 44-year-old woman with CP
KD involving the postauricular area and occipital scalp in an 11-year-old boy. KD involving the postauricular area and occipital scalp in an 11-year-old.
Coronal gadolinium-enhanced T1-weighted image (TR/TE/NEX, 500/15/2) illustrates the common appearance of V2 (arrows) within the foramen rotundum as central.
A and B, CT images on a patient status post total thyroidectomy for thyroid cancer show a small enhancing lesion near the right tracheoesophageal groove.
The cranial nerves and their ganglia within the JF
Coronal postcontrast T1-weighted image of the orbits in patient 1 demonstrates a heterogeneously enhancing ovoid lesion involving the right medial rectus.
Temporal bone CT in the Pöschl (A) and Stenvers (B) planes demonstrating a large defect (arrows) in the roof of the right superior semicircular canal.
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, Coronal enhanced MR image of an IAC meningioma demonstrates intense enhancement of the intralabyrinthine structures (curved white arrow). A, Coronal.
Axial contrast-enhanced CT scan shows bilateral facial soft-tissue tumor infiltration, bilateral enlarged middle cranial fossae (arrowheads), bilateral.
Bone algorithm CT images from the same case, demonstrating focal enlargement of the right tympanic segment, in the axial (left) and coronal (right) planes.
A 67-year-old man with intraorbital, infraorbital nerve, and frontal nerve lesions. A 67-year-old man with intraorbital, infraorbital nerve, and frontal.
Fig 1. Axial T1-weighted MR image (450/15/4), obtained after the administration of contrast medium, shows enhancement within the cisternal segment of the.
Case 5: 39-year-old woman with hearing loss.
Coronal T2 (A) and axial T1 FLAIR (B), T2 (C), and SWI (D) MR images of a 6-day-old boy. Coronal T2 (A) and axial T1 FLAIR (B), T2 (C), and SWI (D) MR.
Images were obtained 5 weeks after the accident
MR images of the brain (axial sections, fluid-attenuated reversion recovery sequences) show the symmetric hyperintensities (arrows) involving the pyramidal.
Axial CT scan shows decalcification of sphenoid bone (arrowheads) adjacent to neurofibroma infiltration of the lateral rectus muscle (arrows) in the absence.
Magnified view of the axial images of the cervical spine at a comparable level (CT scan, left; MR image, center; registered image, right). Magnified view.
Case 2.A, CT image from case 2, showing a small soft tissue mass at the apex of the right orbit (arrow). Case 2.A, CT image from case 2, showing a small.
Images from 1988 obtained in a patient with AIDS with CMV-induced ARN preceding retrobulbar optic neuritis.A, CT scan shows a shrunken left globe with.
A, Axial T2-weighted image (3500/90/2) shows a well-defined deep right occipital white matter lesion (asterisk) and a subcortical linear hyperintensity.
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.
A 59-year-old woman with bilateral descending thoracic vertebral arteries. A 59-year-old woman with bilateral descending thoracic vertebral arteries. A,
X-linked congenital deafness.
A, Axial T2-weighted image from a routine high-resolution 3T screening study to evaluate internal auditory canal lesions shows the right CNIII entering.
Noncontrast CBCT scan of a 13-year-old boy acquired with a sinus protocol (40 seconds, 600 frames, 0.4-mm pixels, 120 kVp, 48 mA). Noncontrast CBCT scan.
58 year-old man referred for SNHL and vertigo 2 days after stapedectomy with a reparative intravestibular granuloma, confirmed by surgery. 58 year-old.
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.
Radiation plexopathy. Radiation plexopathy. A 67-year-old woman with a history of left breast carcinoma and radiation treatment 20 years ago who presented.
Consecutive cranial to caudal axial T2-weighted MR images demonstrate L4 and L5 nerve root anatomy. Consecutive cranial to caudal axial T2-weighted MR.
Case 2, 12-year-old boy with right-side mixed HL
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.
LEC of the right parotid gland in a 38-year-old man with painless masses in the right parotid regions for approximately 3 years. LEC of the right parotid.
Presentation transcript:

A–C, Thin-section (1-mm) coronal and axial CT images of the skull base obtained with an edge-enhancing bone algorithm show enlargement (arrows) of the mastoid canals of cranial nerve VII (A), the foramina of ovale (B), and rotundum (C) bilaterally. A–C, Thin-section (1-mm) coronal and axial CT images of the skull base obtained with an edge-enhancing bone algorithm show enlargement (arrows) of the mastoid canals of cranial nerve VII (A), the foramina of ovale (B), and rotundum (C) bilaterally. Todd R. Aho et al. AJNR Am J Neuroradiol 2004;25:494-497 ©2004 by American Society of Neuroradiology