Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with.

Slides:

Advertisements

Similar presentations

Intrathecal injection is confirmed by visualization of contrast material within the thecal sac, giving a contrast medium–fluid level, while only a small.

Advertisements

Axial source images of left severe ICA stenosis; small residual lumen with vessel wall plaque and thick calcification on the sides. Axial source images.

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

A 20-year-old man with HD. A, Neutral axial gradient-echo image at the C5 level demonstrates subtle bilateral LOA along the lateral aspects of the lamina.

A and B, Sagittal (A) and axial (B) fast spin-echo images of the cervical spine before treatment demonstrate diffuse increase in signal intensity (arrows)

A, A 3.5-inch 22-ga spinal needle is advanced into the right L4–5 facet under intermittent CT guidance, with the patient prone. A, A 3.5-inch 22-ga spinal.

Patient 5. Patient 5. A, Initial sagittal T1-weighted image (483/15/23), obtained 14 hours after the ictus, reveals a short-segment EDH that is isointense.

CT and MR images of patients with inverted papilloma of the maxillary sinus.A, Axial CT image of a patient with inverted papilloma shows cone-shaped focal.

Spine MR imaging of a 35-year-old man with Zika virus infection and Guillain-Barré syndrome presenting with progressive ascending paralysis that evolved.

A, Schematic representation of an anteroposterior view shows orientation of the blunt-tipped Whitacre needle relative to the lamina at the C7–T1 level.

A, Fluoroscopic image with approximately 15° left and caudal angulation shows a 3.5-inch spinal needle (5-inch needles are used for obese patients), which.

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.

A, Sagittal T2WI MR image demonstrates a typical intraspinal extramedullary arachnoid cyst. A, Sagittal T2WI MR image demonstrates a typical intraspinal.

A, After sterile preparation and draping, a 22-gauge spinal needle is carefully advanced into the appropriate neuroforamen immediately subjacent to the.

30-year-old man with 5-month history of pain in the lumbar area, buttock, and right leg. 30-year-old man with 5-month history of pain in the lumbar area,

Coronal (A, B) and sagittal (D) sections of MIP reformations of a MDCTA performed on a 4-row-detector system in a 54-year old woman (patient 10) with an.

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.

42-year-old male patient with follow-up neck CT for lymphoma at 70 kVp (A) and corresponding previous CT at 120 kVp (B). 42-year-old male patient with.

T2-weighted fast spin-echo MR images

A, Sagittal T2-weighted cervicothoracic spine MR image from a patient with intracranial hypotension shows a ventral extradural collection from C6 to T2.

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.

Images obtained in an 86-year-old man with scoliosis and spinal stenosis.A, In patients such as this one, contrast medium may appear to be within the thecal.

Axial CT scan in a patient with left vocal cord paralysis shows atrophy of the left PCA muscle (arrow indicates normal right PCA muscle; arrowhead, laryngeal.

A–C, Anteroposterior (A), oblique (B), and lateral (C) radiographs after thoracic interlaminar epidural injection of contrast material reveal opacification.

Bilateral cochlear nerve absence in a 7-year-old patient with severe dysplasia and bilateral absence of the cochlea (patient C10). Bilateral cochlear nerve.

A, Initial fluoroscopic spot image (A) demonstrating disconnection at the pump connector (arrow). A, Initial fluoroscopic spot image (A) demonstrating.

A, Sagittal view through the brain stem and cervical spinal cord shows the extent of T2 hyperintensities involving the pyramidal tract and posterior columns.

Bony cochlear nerve canal atresia in a patient with CND

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

Patient 7. Patient 7. A 55-year-old man with a history of lethargy, fatigue, and hearing loss. Axial CTM (A and C) and axial MRM (B and D) images. CT shows.

Patient 2. Patient 2. A 62-year-old man with headache and recurrent subdural hemorrhage following evacuation, found to have imaging findings of SIH. Axial.

Terminal myelocystocele

Trends in the use of head CT and advanced imaging in patients treated with IV thrombolysis from 2008 to Trends in the use of head CT and advanced.

A and B, Pre- (A1 and A2) and postoperative (B1 and B2) sagittal (A1 and B1) and axial (A2 and B2) T2-weighted MR images from a patient with SS show a.

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-I, Axial T2-weighted brain MR images from patients with SS show hemosiderin deposition along the cerebellar folia (A), vermis (B) and around the midbrain.

A, A 44-year-old woman with CP

Patient 18 had typical orthostatic headache.

Workflow diagram. Workflow diagram. A, ED CT workflow: the ED porter collects the patient (1); porter, patient, and nurse go to CT (2); porter, patient,

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, CT myelogram and myelogram showing minimal filling of a large right S2 Tarlov cyst with a narrow neck. A, CT myelogram and myelogram showing minimal.

Contrast enhancement of an annular tear at initial and follow-up imaging.A, Annular tear shows contrast enhancement. Contrast enhancement of an annular.

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.

Contrast-agent–enhanced T1-weighted MR images (700/15) obtained in a 71-year-old man with skin cancer, who had TMJ tenderness and discomfort in the left.

A 34-year-old woman with SLE with APS

Demonstration of measurements made during virtual needle placement on a CT scan of the pelvis in a 65-year-old woman. Demonstration of measurements made.

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 image (A), 3D view generated from the CT images (B), axial T1 and T2-weighted images (C and D), sagittal T1 and T2-weighted images (E and F) clearly.

A, The preprocedure axial CT examination showing almost complete absence of the posterior cortex at the L1 level in a 76-year-old man with metastatic hepatoma.

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.

Sagittal MPRAGE (A) and axial T2-weighted (B) images demonstrate extensive focal cortical dysplasia (arrow) involving most of the visualized left frontal.

A, Sagittal T2-weighted MR image reveals a large left L4–5 synovial cyst causing moderate central canal stenosis and compression of the exiting left L4.

The “white gray sign.” Axial high-resolution 3D inversion recovery fast-spoiled gradient-echo T1-weighted image demonstrates decreased gray-white contrast.

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, Bilateral disk herniation at C6–7 encroaching the spinal canal.

A, Sagittal fast spin-echo (FSE) T2-weighted image shows a hypointense mass (arrowheads) in the anterior aspect of the spinal canal that extends from C3.

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.

Fluoroscopic images of L2 after intrathecal injection of contrast material and placement of an 11-gauge trocar in the right pedicle.A, Anteroposterior.

Short-interval follow-up cervical MR imaging of a 67-year-old male ASIA A patient with SCI. T2-weighted FSE images were obtained from an initial MR imaging.

Patient 8. Patient 8. A 55-year-old man with postural headache and low CSF pressure on lumbar puncture. Axial CTM (A), axial MRM (B), and coronal MRM (C)

MR images of the cervical spine

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.

Comprehensive imaging of a patient with recent stroke depicting left MCA stenosis. Comprehensive imaging of a patient with recent stroke depicting left.

Consecutive cranial to caudal axial T2-weighted MR images demonstrate L4 and L5 nerve root anatomy. Consecutive cranial to caudal axial T2-weighted MR.

Patient 3. Patient 3. A, Initial sagittal T1-weighted image (600/8/2 [TR/TE/excitations]), obtained 120 hours after symptom onset, reveals a long-segment.

Twelve-year-old girl with coinfection of JE and NCC (patient 5).

Axial contrast-enhanced CT (A) and sagittal contrast-enhanced reformatted (B) images reveal a well-defined ovoid mass with homogeneous intense enhancement.

Presentation transcript:

Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with neuroclaudication symptoms. Axial (A and B) and sagittal (C) T2-weighted MR images reveal synovial cysts at L4–5 bilaterally, causing severe central canal stenosis in a patient with neuroclaudication symptoms. A small tail is seen extending from the posterolateral aspect of the left synovial cyst to the left L4–5 facet joint (B), with associated degenerative changes of the facet joint. D, Two 22-ga 3.5-inch spinal needles are advanced with CT guidance into the posterior aspect of the L4–5 facet joints bilaterally, and a test injection of contrast confirms appropriate access to each joint, respectively. E, After forceful injection of contrast mixed with steroid, epidural extension of contrast material is seen, confirming cyst rupture. Contrast extravasation is also noted along the needle trajectory, (F). J.L. Bykowski, and W.H.W. Wong AJNR Am J Neuroradiol 2012;33:1419-1426 ©2012 by American Society of Neuroradiology