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Index by author

June 01, 2019; Volume 40,Issue 6

  1. Kim, S.O.

    1. Head & Neck
      A Scoring System for Prediction of Cervical Lymph Node Metastasis in Patients with Head and Neck Squamous Cell Carcinoma
      M.S. Chung, Y.J. Choi, S.O. Kim, Y.S. Lee, J.Y. Hong, J.H. Lee and J.H. Baek
      American Journal of Neuroradiology June 2019, 40 (6) 1049-1054; DOI: https://doi.org/10.3174/ajnr.A6066

  2. Kim, S.U.

    1. EDITOR'S CHOICEAdult Brain
      Open Access
      A Novel Collateral Imaging Method Derived from Time-Resolved Dynamic Contrast-Enhanced MR Angiography in Acute Ischemic Stroke: A Pilot Study
      H.G. Roh, E.Y. Kim, I.S. Kim, H.J. Lee, J.J. Park, S.B. Lee, J.W. Choi, Y.S. Jeon, M. Park, S.U. Kim and H.J. Kim
      American Journal of Neuroradiology June 2019, 40 (6) 946-953; DOI: https://doi.org/10.3174/ajnr.A6068

      The purpose of this study was to introduce a multiphase MRA collateral map derived from time-resolved dynamic contrast-enhanced MRA and to verify the value of the multiphase MRA collateral map in acute ischemic stroke by comparing it with the multiphase collateral imaging method (MRP collateral map) derived from dynamic susceptibility contrast-enhanced MR perfusion. The authors generated collateral maps using dynamic signals from dynamic contrast-enhanced MRA and DSC-MRP in 67 patients using a Matlab-based in-house program and graded the collateral scores of the multiphase MRA collateral map and the MRP collateral map independently. Interobserver reliabilities and intermethod agreement between both collateral maps for collateral grading were tested. The interobserver reliabilities forcollateral grading using multiphase MRA or MRP collateral maps were excellent. They conclude that the dynamic signals of dynamic contrast-enhanced MRA can generate multiphasecollateral images and show the possibility of the multiphase MRA collateral map as a useful collateral imaging method in acute ischemic stroke.

  3. Kimberly, W.T.

    1. EDITOR'S CHOICEAdult Brain
      Open Access
      Ensemble of Convolutional Neural Networks Improves Automated Segmentation of Acute Ischemic Lesions Using Multiparametric Diffusion-Weighted MRI
      S. Winzeck, S.J.T. Mocking, R. Bezerra, M.J.R.J. Bouts, E.C. McIntosh, I. Diwan, P. Garg, A. Chutinet, W.T. Kimberly, W.A. Copen, P.W. Schaefer, H. Ay, A.B. Singhal, K. Kamnitsas, B. Glocker, A.G. Sorensen and O. Wu
      American Journal of Neuroradiology June 2019, 40 (6) 938-945; DOI: https://doi.org/10.3174/ajnr.A6077

      Convolutional neural networks were trained on combinations of DWI, ADC, and low b-value-weighted images from 116 subjects. The performances of the networks (measured by the Dice score, sensitivity, and precision) were compared with one another and with ensembles of 5 networks. An ensemble of convolutional neural networks trained on DWI, ADC, and low b-value-weighted images produced the most accurate acute infarct segmentation over individual networks. Automated volumes correlated with manually measured volumes for the independent cohort.

  4. Kimura, Yuiko

    1. Pediatrics
      Open Access
      Radiologic and Pathologic Features of the Transmantle Sign in Focal Cortical Dysplasia: The T1 Signal Is Useful for Differentiating Subtypes
      Yukio Kimura, A. Shioya, Y. Saito, Y. Oitani, Y. Shigemoto, E. Morimoto, F. Suzuki, N. Ikegaya, Yuiko Kimura, K. Iijima, Y. Takayama, M. Iwasaki, M. Sasaki and N. Sato
      American Journal of Neuroradiology June 2019, 40 (6) 1060-1066; DOI: https://doi.org/10.3174/ajnr.A6067

  5. Kimura, Yukio

    1. Pediatrics
      Open Access
      Radiologic and Pathologic Features of the Transmantle Sign in Focal Cortical Dysplasia: The T1 Signal Is Useful for Differentiating Subtypes
      Yukio Kimura, A. Shioya, Y. Saito, Y. Oitani, Y. Shigemoto, E. Morimoto, F. Suzuki, N. Ikegaya, Yuiko Kimura, K. Iijima, Y. Takayama, M. Iwasaki, M. Sasaki and N. Sato
      American Journal of Neuroradiology June 2019, 40 (6) 1060-1066; DOI: https://doi.org/10.3174/ajnr.A6067

  6. Kotsenas, A.L.

    1. The Continued Rise in Professional Use of Social Media at Scientific Meetings: An Analysis of Twitter Use during the ASNR 2018 Annual Meeting
      G. D'Anna, M.M. Chen, J.L. McCarty, A. Radmanesh and A.L. Kotsenas
      American Journal of Neuroradiology June 2019, 40 (6) 935-937; DOI: https://doi.org/10.3174/ajnr.A6064

  7. Kovanlikaya, I.

    1. Adult Brain
      Open Access
      Quantitative Susceptibility Mapping of Time-Dependent Susceptibility Changes in Multiple Sclerosis Lesions
      S. Zhang, T.D. Nguyen, S.M. Hurtado Rúa, U.W. Kaunzner, S. Pandya, I. Kovanlikaya, P. Spincemaille, Y. Wang and S.A. Gauthier
      American Journal of Neuroradiology June 2019, 40 (6) 987-993; DOI: https://doi.org/10.3174/ajnr.A6071

  8. Kumar, S.

    1. Adult Brain
      Open Access
      Baseline and Evolutionary Radiologic Features in Sporadic, Hemorrhagic Brain Cavernous Malformations
      K.D. Flemming, S. Kumar, G. Lanzino and W. Brinjikji
      American Journal of Neuroradiology June 2019, 40 (6) 967-972; DOI: https://doi.org/10.3174/ajnr.A6076

  9. Kyheng, M.

    1. FELLOWS' JOURNAL CLUBNeurointervention
      First-Line Sofia Aspiration Thrombectomy Approach within the Endovascular Treatment of Ischemic Stroke Multicentric Registry: Efficacy, Safety, and Predictive Factors of Success
      G. Marnat, X. Barreau, L. Detraz, R. Bourcier, B. Gory, A. Sgreccia, F. Gariel, J. Berge, P. Menegon, M. Kyheng, J. Labreuche, A. Consoli, R. Blanc and B. Lapergue on behalf of the ETIS Investigators
      American Journal of Neuroradiology June 2019, 40 (6) 1006-1012; DOI: https://doi.org/10.3174/ajnr.A6074

      The authors performed a retrospective analysis of the prospectively maintained Endovascular Treatment of Ischemic Stroke multicentric registry. Data from consecutive patients who benefited from thrombectomy with a first-line Sofia approach between January 2013 and April 2018 were studied. We excluded other first-line approaches (stent retriever or combined aspiration and stent retriever) and extracranial occlusions. During the study period, 296 patients were treated. Mean age and initial NIHSS score were, respectively, 69.5 years and 16. Successful reperfusion, defined by the modified TICI 2b/3, was obtained in 86.1%. Complete reperfusion (modified TICI 3) was obtained in 41.2%. A first-pass effect was achieved in 24.2%. A rescue stent retriever approach was required in 29.7%. The first-line contact aspiration approach appeared safe and efficient with Sofia catheters. These devices achieved very high reperfusion rates with a low requirement for stent retriever rescue therapy, especially for M1 occlusions.

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