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Table of Contents

October 01, 2020; Volume 41,Issue 10

Perspectives

  • You have access
    Perspectives
    Alex Lindqwister
    American Journal of Neuroradiology October 2020, 41 (10) 1759; DOI: https://doi.org/10.3174/ajnr.P0107

Review Articles

  • Adult Brain
    Open Access
    Neuroimaging in Zoonotic Outbreaks Affecting the Central Nervous System: Are We Fighting the Last War?
    G.X. Goh, K. Tan, B.S.P. Ang, L.-F. Wang and C.C. Tchoyoson Lim
    American Journal of Neuroradiology October 2020, 41 (10) 1760-1767; DOI: https://doi.org/10.3174/ajnr.A6727
  • Head & Neck
    Open Access
    Stapedial Artery: From Embryology to Different Possible Adult Configurations
    S. Bonasia, S. Smajda, G. Ciccio and T. Robert
    American Journal of Neuroradiology October 2020, 41 (10) 1768-1776; DOI: https://doi.org/10.3174/ajnr.A6738
  • Head & Neck
    Open Access
    Middle Meningeal Artery: Anatomy and Variations
    S. Bonasia, S. Smajda, G. Ciccio and T. Robert
    American Journal of Neuroradiology October 2020, 41 (10) 1777-1785; DOI: https://doi.org/10.3174/ajnr.A6739

Radiology-Pathology Correlation

  • Spine
    You have access
    Exophytic Lumbar Vertebral Body Mass in an Adult with Back Pain
    J.C. Benson, M.A. Vizcaino, D.K. Kim, C. Carr, P. Rose, L. Eckel and F. Diehn
    American Journal of Neuroradiology October 2020, 41 (10) 1786-1790; DOI: https://doi.org/10.3174/ajnr.A6749

General Contents

  • FELLOWS' JOURNAL CLUBAdult Brain
    Open Access
    Clinical and Neuroimaging Correlation in Patients with COVID-19
    B.C. Yoon, K. Buch, M. Lang, B.P. Applewhite, M.D. Li, W.A. Mehan, T.M. Leslie-Mazwi and S.P. Rincon
    American Journal of Neuroradiology October 2020, 41 (10) 1791-1796; DOI: https://doi.org/10.3174/ajnr.A6717

    This was a retrospective study performed at a large academic hospital in the United States. A total of 641 patients presented to the authors' institution between March 3, 2020 and May 6, 2020, for treatment of coronavirus disease 2019, of whom, 150 underwent CT and/or MR imaging of the brain. CT and/or MR imaging examinations were evaluated for the presence of hemorrhage, infarction, and leukoencephalopathy. Of the 150 patients, 26 (17%) had abnormal CT and/or MR imaging findings, with hemorrhage in 11 of the patients (42%), infarction in 13 of the patients (50%), and leukoencephalopathy in 7 of the patients (27%). Significant associations were seen between abnormal CT/MR imaging findings and intensive care unit admission, intubation, and acute kidney injury.

  • Adult Brain
    Open Access
    Bilateral Basal Ganglia Hemorrhage in a Patient with Confirmed COVID-19
    R. Daci, M. Kennelly, A. Ferris, M.U. Azeem, M.D. Johnson, F. Hamzei-Sichani, A.H. Jun-O’Connell and S.K. Natarajan
    American Journal of Neuroradiology October 2020, 41 (10) 1797-1799; DOI: https://doi.org/10.3174/ajnr.A6712
  • Adult Brain
    Open Access
    Pressing Issues in COVID-19: Probable Cause to Seize SARS-CoV-2 for Its Preferential Involvement of Posterior Circulation Manifesting as Severe Posterior Reversible Encephalopathy Syndrome and Posterior Strokes
    F. D’Amore, G. Vinacci, E. Agosti, L.P. Cariddi, A.V. Terrana, F.A. Vizzari, M. Mauri and A. Giorgianni
    American Journal of Neuroradiology October 2020, 41 (10) 1800-1803; DOI: https://doi.org/10.3174/ajnr.A6679
  • FELLOWS' JOURNAL CLUBAdult Brain
    Open Access
    Imaging Features of Acute Encephalopathy in Patients with COVID-19: A Case Series
    S. Kihira, B.N. Delman, P. Belani, L. Stein, A. Aggarwal, B. Rigney, J. Schefflein, A.H. Doshi and P.S. Pawha
    American Journal of Neuroradiology October 2020, 41 (10) 1804-1808; DOI: https://doi.org/10.3174/ajnr.A6715

    The authors present 5 cases that illustrate varying imaging presentations of acute encephalopathy in patients with coronavirus disease 2019. MR features include leukoencephalopathy, diffusion restriction that involves the GM and WM, microhemorrhages, and leptomeningitis.

  • Adult Brain
    You have access
    Perfusion Parameter Thresholds That Discriminate Ischemic Core Vary with Time from Onset in Acute Ischemic Stroke
    T. Yoshie, Y. Yu, H. Jiang, T. Honda, H. Trieu, F. Scalzo, J.L. Saver, D.S. Liebeskind and on behalf of the UCLA Reperfusion Therapy Investigators
    American Journal of Neuroradiology October 2020, 41 (10) 1809-1815; DOI: https://doi.org/10.3174/ajnr.A6744
  • EDITOR'S CHOICEAdult Brain
    You have access
    Presurgical Identification of Primary Central Nervous System Lymphoma with Normalized Time-Intensity Curve: A Pilot Study of a New Method to Analyze DSC-PWI
    A. Pons-Escoda, A. Garcia-Ruiz, P. Naval-Baudin, M. Cos, N. Vidal, G. Plans, J. Bruna, R. Perez-Lopez and C. Majos
    American Journal of Neuroradiology October 2020, 41 (10) 1816-1824; DOI: https://doi.org/10.3174/ajnr.A6761

    The aims of this study were to: 1) to design a new method of postprocessing time-intensity curves, which renders normalized curves, and 2) to test its feasibility and performance on the diagnosis of primary central nervous system lymphoma. Time-intensity curves of enhancing tumor and normal-appearing white matter were obtained for each case. Enhancing tumor time-intensity curves were normalized relative to normal-appearing white matter. The authors performed pair-wise comparisons for primary central nervous system lymphoma against the other tumor type. The best discriminatory time points of the curves were obtained through a stepwise selection. Logistic binary regression was applied to obtain prediction models. A total of 233 patients were included in the study with 47 primary central nervous system lymphomas, 48 glioblastomas, 39 anaplastic astrocytomas, 49 metastases, and 50 meningiomas. The classifiers satisfactorily performed all bilateral comparisons in the test subset. They conclude that the proposed method for DSC-PWI time-intensity curve normalization renders comparable curves beyond technical and patient variability. Normalized time-intensity curves performed satisfactorily for the presurgical identification of primary central nervous system lymphoma.

  • EDITOR'S CHOICEAdult Brain
    Open Access
    Tentorial Venous Anatomy: Variation in the Healthy Population
    J.S. Rosenblum, J.M. Tunacao, V. Chandrashekhar, A. Jha, M. Neto, C. Weiss, J. Smirniotopoulos, B.R. Rosenblum and J.D. Heiss
    American Journal of Neuroradiology October 2020, 41 (10) 1825-1832; DOI: https://doi.org/10.3174/ajnr.A6775

    The authors retrospectively reviewed tentorial venous anatomy of the head using CTA/CTV performed for routine care or research purposes in 238 patients. Tentorial vein development was related to the ring configuration of the tentorial sinuses. There were 3 configurations: Groups 1A and 1B had ring configuration, while group 2 did not. Group 1A had a medialized ring configuration, and group 1B had a lateralized ring configuration. Measurements of skull base development were predictive of these groups. The ring configuration of group 1 was related to the presence of a split confluens, which correlated with a decreased internal auditory canal-petroclival fissure angle. Configuration 1A was related to the degree of petrous apex pneumatization.

  • Adult Brain
    You have access
    The Variable Appearance of Third Ventricular Colloid Cysts: Correlation with Histopathology and the Risk of Obstructive Ventriculomegaly
    S.D. Khanpara, A.L. Day, M.B. Bhattacharjee, R.F. Riascos, J.P. Fernelius and K.D. Westmark
    American Journal of Neuroradiology October 2020, 41 (10) 1833-1840; DOI: https://doi.org/10.3174/ajnr.A6722
  • Neurointervention
    You have access
    Transcranial MR Imaging–Guided Focused Ultrasound Interventions Using Deep Learning Synthesized CT
    P. Su, S. Guo, S. Roys, F. Maier, H. Bhat, E.R. Melhem, D. Gandhi, R. Gullapalli and J. Zhuo
    American Journal of Neuroradiology October 2020, 41 (10) 1841-1848; DOI: https://doi.org/10.3174/ajnr.A6758
  • Neurointervention
    Open Access
    Regional Mechanical Thrombectomy Imaging Protocol in Patients Presenting with Acute Ischemic Stroke during the COVID-19 Pandemic
    P.S. Dhillon, K. Pointon, R. Lenthall, S. Nair, G. Subramanian, N. McConachie and W. Izzath
    American Journal of Neuroradiology October 2020, 41 (10) 1849-1855; DOI: https://doi.org/10.3174/ajnr.A6754
  • Neurointervention
    You have access
    Antiplatelet Management for Stent-Assisted Coiling and Flow Diversion of Ruptured Intracranial Aneurysms: A DELPHI Consensus Statement
    J.M. Ospel, P. Brouwer, F. Dorn, A. Arthur, M.E. Jensen, R. Nogueira, R. Chapot, F. Albuquerque, C. Majoie, M. Jayaraman, A. Taylor, J. Liu, J. Fiehler, N. Sakai, K. Orlov, D. Kallmes, J.F. Fraser, L. Thibault and M. Goyal
    American Journal of Neuroradiology October 2020, 41 (10) 1856-1862; DOI: https://doi.org/10.3174/ajnr.A6814
  • Neurointervention
    You have access
    The Dilator-Dotter Technique: A Modified Method of Rapid Internal Carotid Artery Revascularization in Acute Ischemic Stroke
    K. Amuluru, D. Sahlein, F. Al-Mufti, T. Payner, C. Kulwin, A. DeNardo and J. Scott
    American Journal of Neuroradiology October 2020, 41 (10) 1863-1868; DOI: https://doi.org/10.3174/ajnr.A6733
  • Neurointervention
    You have access
    Quantifying Intra-Arterial Verapamil Response as a Diagnostic Tool for Reversible Cerebral Vasoconstriction Syndrome
    J.M. Sequeiros, J.A. Roa, R.P. Sabotin, S. Dandapat, S. Ortega-Gutierrez, E.C. Leira, C.P. Derdeyn, G. Bathla, D.M. Hasan and E.A. Samaniego
    American Journal of Neuroradiology October 2020, 41 (10) 1869-1875; DOI: https://doi.org/10.3174/ajnr.A6772
  • Neurointervention
    You have access
    Intraprocedural Flat Panel Detector Rotational Angiography and an Image Fusion Technique for Delivery of a Microcatheter into the Targeted Shunt Pouch of a Dural Arteriovenous Fistula
    J.H. Choi, D.Y. Cho, Y.S. Shin and B.-S. Kim
    American Journal of Neuroradiology October 2020, 41 (10) 1876-1878; DOI: https://doi.org/10.3174/ajnr.A6724
  • Neurointervention
    You have access
    Microcatheter Originating Debris during Neuroendovascular Procedures: Mechanism of Dislodgement and Its Prevention
    I. Kan, K. Karagiozov, S. Ito, S. Sato and Y. Murayama
    American Journal of Neuroradiology October 2020, 41 (10) 1879-1881; DOI: https://doi.org/10.3174/ajnr.A6723
  • FELLOWS' JOURNAL CLUBHead & Neck
    Open Access
    Olfactory Bulb Signal Abnormality in Patients with COVID-19 Who Present with Neurologic Symptoms
    S.B. Strauss, J.E. Lantos, L.A. Heier, D.R. Shatzkes and C.D. Phillips
    American Journal of Neuroradiology October 2020, 41 (10) 1882-1887; DOI: https://doi.org/10.3174/ajnr.A6751

    This retrospective case-control study compared the olfactory bulb and olfactory tract signal intensity on thin-section T2WI and postcontrast 3D T2 FLAIR images in patients with COVID-19 and neurologic symptoms, and age-matched controls imaged for olfactory dysfunction. Olfactory bulb 3D T2-FLAIR signal intensity was greater in the patients with COVID-19 and neurologic symptoms compared with an age-matched control group with olfactory dysfunction, and this was qualitatively apparent in 4 of 12 patients with COVID-19. Analysis of these preliminary findings suggests that olfactory apparatus vulnerability to COVID-19 might be supported on conventional neuroimaging and may serve as a noninvasive biomarker of infection.

  • EDITOR'S CHOICEHead & Neck
    You have access
    Are Gadolinium-Enhanced MR Sequences Needed in Simultaneous 18F-FDG-PET/MRI for Tumor Delineation in Head and Neck Cancer?
    N. Pyatigorskaya, R. De Laroche, G. Bera, A. Giron, C. Bertolus, G. Herve, E. Chambenois, S. Bergeret, D. Dormont, M. Amor-Sahli and A. Kas
    American Journal of Neuroradiology October 2020, 41 (10) 1888-1896; DOI: https://doi.org/10.3174/ajnr.A6764

    Consecutive patients who underwent simultaneous head and neck 18F-FDG-PET/MR imaging staging or restaging followed by surgery were retrospectively included in this study. Local tumor invasion and lymph node extension were assessed by 2 rater groups in 45 head and neck anatomic regions using 18F-FDG-PET/MR imaging. Two reading sessions were performed, one without contrast-enhanced sequences (using only T1WI, T2WI, and PET images) and a second with additional T1-weighted postcontrast sequences. The k concordance coefficient between the reading sessions and sensitivity and specificity for each region were calculated. There was excellent agreement between the contrast-free and postgadolinium reading sessions in delineating precise tumor extension in the 45 anatomic regions studied. The diagnostic accuracy did not differ between contrast-free and postgadolinium reading sessions, being 0.97 for both groups and both reading sessions. The authors conclude that gadolinium-based contrast administration showed no added value for accurate characterization of head and neck primary tumor extension and could possibly be avoided in the PET/MR imaging head and neck workflow.

  • Head & Neck
    You have access
    Prediction of Human Papillomavirus Status and Overall Survival in Patients with Untreated Oropharyngeal Squamous Cell Carcinoma: Development and Validation of CT-Based Radiomics
    Y. Choi, Y. Nam, J. Jang, N.-Y. Shin, K.-J. Ahn, B.-S. Kim, Y.-S. Lee and M.-S. Kim
    American Journal of Neuroradiology October 2020, 41 (10) 1897-1904; DOI: https://doi.org/10.3174/ajnr.A6756
  • Pediatrics
    Open Access
    COVID-19-Associated Cytotoxic Lesions of the Corpus Callosum
    P. Gaur, L. Dixon, B. Jones, H. Lyall and W. Jan
    American Journal of Neuroradiology October 2020, 41 (10) 1905-1907; DOI: https://doi.org/10.3174/ajnr.A6713
  • Pediatrics
    Open Access
    Maternal Anxiety and Depression during Late Pregnancy and Newborn Brain White Matter Development
    R.M. Graham, L. Jiang, G. McCorkle, B.J. Bellando, S.T. Sorensen, C.M. Glasier, R.H. Ramakrishnaiah, A.C. Rowell, J.L. Coker and X. Ou
    American Journal of Neuroradiology October 2020, 41 (10) 1908-1915; DOI: https://doi.org/10.3174/ajnr.A6759
  • Pediatrics
    You have access
    Intracranial Arterial Tortuosity in Marfan Syndrome and Loeys-Dietz Syndrome: Tortuosity Index Evaluation Is Useful in the Differential Diagnosis
    L. Spinardi, G. Vornetti, S. De Martino, R. Golfieri, L. Faccioli, M. Pastore Trossello, C. Graziano, E. Mariucci and A. Donti
    American Journal of Neuroradiology October 2020, 41 (10) 1916-1922; DOI: https://doi.org/10.3174/ajnr.A6732
  • Pediatrics
    You have access
    Fetal Intraventricular Hemorrhage in Open Neural Tube Defects: Prenatal Imaging Evaluation and Perinatal Outcomes
    R.A. Didier, J.S. Martin-Saavedra, E.R. Oliver, S.E. DeBari, L.T. Bilaniuk, L.J. Howell, J.S. Moldenhauer, N.S. Adzick, G.G. Heuer and B.G. Coleman
    American Journal of Neuroradiology October 2020, 41 (10) 1923-1929; DOI: https://doi.org/10.3174/ajnr.A6745
  • Pediatrics
    You have access
    Expanding the Neuroimaging Phenotype of Neuronal Ceroid Lipofuscinoses
    A. Biswas, P. Krishnan, A. Amirabadi, S. Blaser, S. Mercimek-Andrews and M. Shroff
    American Journal of Neuroradiology October 2020, 41 (10) 1930-1936; DOI: https://doi.org/10.3174/ajnr.A6726
  • Pediatrics
    Open Access
    CT-Based Measurements of Facial Parameters of Healthy Children and Adolescents in Thailand
    N. Jullabussapa, K. Khwanngern, C. Pateekhum, C. Angkurawaranon and S. Angkurawaranon
    American Journal of Neuroradiology October 2020, 41 (10) 1937-1942; DOI: https://doi.org/10.3174/ajnr.A6731
  • Pediatrics
    Open Access
    MRI Spectrum of Brain Involvement in Sphingosine-1-Phosphate Lyase Insufficiency Syndrome
    K.W. Martin, N. Weaver, K. Alhasan, E. Gumus, B.R. Sullivan, M. Zenker, F. Hildebrandt and J.D. Saba
    American Journal of Neuroradiology October 2020, 41 (10) 1943-1948; DOI: https://doi.org/10.3174/ajnr.A6746
  • Spine
    Open Access
    Paraspinal Myositis in Patients with COVID-19 Infection
    W.A. Mehan, B.C. Yoon, M. Lang, M.D. Li, S. Rincon and K. Buch
    American Journal of Neuroradiology October 2020, 41 (10) 1949-1952; DOI: https://doi.org/10.3174/ajnr.A6711
  • Spine
    You have access
    Safety of Consecutive Bilateral Decubitus Digital Subtraction Myelography in Patients with Spontaneous Intracranial Hypotension and Occult CSF Leak
    M.C. Pope, C.M. Carr, W. Brinjikji and D.K. Kim
    American Journal of Neuroradiology October 2020, 41 (10) 1953-1957; DOI: https://doi.org/10.3174/ajnr.A6765
  • Spine
    You have access
    Time to Resolution of Inadvertent Subdural Contrast Injection during a Myelogram: When Can the Study Be Reattempted?
    D.P. Shlapak, D.K. Kim, F.E. Diehn, J.C Benson, V.T. Lehman, G.B. Liebo, J.M. Morris, P.P. Morris, J.T. Verdoorn and C.M. Carr
    American Journal of Neuroradiology October 2020, 41 (10) 1958-1962; DOI: https://doi.org/10.3174/ajnr.A6725

Online Features

  • Letters

    • Letter
      You have access
      Recanalized Aneurysms: Is Rupture Further Preventable?
      T. Kimura
      American Journal of Neuroradiology October 2020, 41 (10) E85; DOI: https://doi.org/10.3174/ajnr.A6734
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American Journal of Neuroradiology: 41 (10)
American Journal of Neuroradiology
Vol. 41, Issue 10
1 Oct 2020
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