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American Journal of Neuroradiology
American Journal of Neuroradiology

American Journal of Neuroradiology

ASHNR American Society of Functional Neuroradiology ASHNR American Society of Pediatric Neuroradiology ASSR
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Welcome to the new AJNR, Updated Hall of Fame, and more. Read the full announcements.


AJNR is seeking candidates for the position of Associate Section Editor, AJNR Case Collection. Read the full announcement.

 

MY CONTENT

  • Pediatrics
    You have access
    Biometry of the Cerebellar Vermis and Brain Stem in Children: MR Imaging Reference Data from Measurements in 718 Children
    C. Jandeaux, G. Kuchcinski, C. Ternynck, A. Riquet, X. Leclerc, J.-P. Pruvo and G. Soto-Ares
    American Journal of Neuroradiology November 2019, 40 (11) 1835-1841; DOI: https://doi.org/10.3174/ajnr.A6257
  • Head & Neck
    Open Access
    MR Imaging of the Extracranial Facial Nerve with the CISS Sequence
    J.P. Guenette, N. Ben-Shlomo, J. Jayender, R.T. Seethamraju, V. Kimbrell, N.-A. Tran, R.Y. Huang, C.J. Kim, J.I. Kass, C.E. Corrales and T.C. Lee
    American Journal of Neuroradiology November 2019, 40 (11) 1954-1959; DOI: https://doi.org/10.3174/ajnr.A6261
  • EDITOR'S CHOICEPediatrics
    You have access
    Comparison of CBF Measured with Combined Velocity-Selective Arterial Spin-Labeling and Pulsed Arterial Spin-Labeling to Blood Flow Patterns Assessed by Conventional Angiography in Pediatric Moyamoya
    D.S. Bolar, B. Gagoski, D.B. Orbach, E. Smith, E. Adalsteinsson, B.R. Rosen, P.E. Grant and R.L. Robertson
    American Journal of Neuroradiology November 2019, 40 (11) 1842-1849; DOI: https://doi.org/10.3174/ajnr.A6262

    This study assesses the accuracy of combined velocity-selective arterial spin-labeling and traditional pulsed arterial spin-labeling CBF measurements in pediatric Moyamoya disease, with comparison with blood flow patterns on conventional angiography. Twenty-two neurologically stable pediatric patients with Moyamoya disease and 5 asymptomatic siblings without frank Moyamoya disease were imaged with velocity-selective arterial spin-labeling, pulsed arterial spin-labeling, and DSA (patients). Qualitatively, velocity-selective arterial spin-labeling perfusion maps reflect the DSA parenchymal phase, regardless of postinjection timing. Conversely, pulsed arterial spin-labeling maps reflect the DSA appearance at postinjection times closer to pulsed arterial spin-labeling postlabeling delay, regardless of vascular phase. ASPECTS comparison showed excellent agreement between arterial spin-labeling and DSA, suggesting velocity-selective arterial spin-labeling and pulsed arterial spin-labeling capture key perfusion and transit delay information, respectively. Velocity-selective arterial spin-labeling offers a powerful approach to image perfusion in pediatric Moyamoya disease due to transit delay insensitivity.

  • Head & Neck
    You have access
    Diagnostic Accuracy and Scope of Intraoperative Transoral Ultrasound and Transoral Ultrasound–Guided Fine-Needle Aspiration of Retropharyngeal Masses
    T.H. Vu, M. Kwon, S. Ahmed, M. Gule-Monroe, M.M. Chen, J. Sun, B.D. Fornage, J.M. Debnam and B. Edeiken-Monroe
    American Journal of Neuroradiology November 2019, 40 (11) 1960-1964; DOI: https://doi.org/10.3174/ajnr.A6236
  • Pediatrics
    You have access
    Susceptibility-Weighted Imaging Findings in Aspartylglucosaminuria
    A. Tokola, M. Laine, R. Tikkanen and T. Autti
    American Journal of Neuroradiology November 2019, 40 (11) 1850-1854; DOI: https://doi.org/10.3174/ajnr.A6288
  • FELLOWS' JOURNAL CLUBSpine
    You have access
    Armed Kyphoplasty: An Indirect Central Canal Decompression Technique in Burst Fractures
    A. Venier, L. Roccatagliata, M. Isalberti, P. Scarone, D.E. Kuhlen, M. Reinert, G. Bonaldi, J.A. Hirsch and A. Cianfoni
    American Journal of Neuroradiology November 2019, 40 (11) 1965-1972; DOI: https://doi.org/10.3174/ajnr.A6285

    This study assesses the results of armed kyphoplasty using vertebral body stents or the SpineJack in traumatic, osteoporotic, and neoplastic burst fractures with respect to vertebral body height restoration and correction of posterior wall retropulsion. The authors performed a retrospective assessment of 53 burst fractures with posterior wall retropulsion and no neurologic deficit in 51 consecutive patients treated with armed kyphoplasty. Posterior wall retropulsion and vertebral body height were measured on pre- and postprocedural CT. Armed kyphoplasty was performed as a stand-alone treatment in 43 patients, combined with posterior instrumentation in 8 and laminectomy in 4. Pre-armed kyphoplasty and post-armed kyphoplasty mean posterior wall retropulsion was 5.8 and 4.5 mm, respectively, and mean vertebral body height was 10.8 and 16.7 mm, respectively. They conclude that in the treatment of burst fractures with posterior wall retropulsion and no neurologic deficit, armed kyphoplastyyields fracture reduction, internal fixation, and indirect central canal decompression.

  • FELLOWS' JOURNAL CLUBPatient Safety
    Open Access
    Evaluation of Lower-Dose Spiral Head CT for Detection of Intracranial Findings Causing Neurologic Deficits
    J.G. Fletcher, D.R. DeLone, A.L. Kotsenas, N.G. Campeau, V.T. Lehman, L. Yu, S. Leng, D.R. Holmes, P.K. Edwards, M.P. Johnson, G.J. Michalak, R.E. Carter and C.H. McCollough
    American Journal of Neuroradiology November 2019, 40 (11) 1855-1863; DOI: https://doi.org/10.3174/ajnr.A6251

    Projection data from 83 patients undergoing unenhanced spiral head CT for suspected neurologic deficits were collected. A routine dose was obtained using 250 effective mAs and iterative reconstruction. Lower-dose configurations were reconstructed (25-effective mAs iterative reconstruction, 50-effective mAs filtered back-projection and iterative reconstruction, 100-effective mAs filtered back-projection and iterative reconstruction, 200-effective mAs filtered back-projection). Three neuroradiologists circled findings, indicating diagnosis, confidence, and image quality. The routine-dose jackknife alternative free-response receiver operating characteristic figure of merit was 0.87. Noninferiority was shown for 100-effective mAs iterative reconstruction and 200-effective mAs filtered back-projection, but not for100-effective mAs filtered back-projection. The authors conclude that substantial opportunity exists for dose reduction using spiral nonenhanced head CT and that the dose level might potentially be reduced to 40% of routine dose levels or a volume CT dose index of approximately 15mGy if slight decreases in performance are acceptable. The beneficial effect of iterative reconstrution was most pronounced at this 15-mGy dose level.

  • Spine
    You have access
    Unintended Consequences: Review of New Artifacts Introduced by Iterative Reconstruction CT Metal Artifact Reduction in Spine Imaging
    D.R. Wayer, N.Y. Kim, B.J. Otto, A.M. Grayev and A.D. Kuner
    American Journal of Neuroradiology November 2019, 40 (11) 1973-1975; DOI: https://doi.org/10.3174/ajnr.A6238
  • Patient Safety
    You have access
    Dose Reduction While Preserving Diagnostic Quality in Head CT: Advancing the Application of Iterative Reconstruction Using a Live Animal Model
    F.D. Raslau, E.J. Escott, J. Smiley, C. Adams, D. Feigal, H. Ganesh, C. Wang and J. Zhang
    American Journal of Neuroradiology November 2019, 40 (11) 1864-1870; DOI: https://doi.org/10.3174/ajnr.A6258
  • 35 Years Ago In Ajnr
    You have access
    Celebrating 35 Years of the AJNR
    American Journal of Neuroradiology November 2019, 40 (11) 1976; DOI: https://doi.org/10.3174/ajnr.P0084

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