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Index by author

October 01, 2018; Volume 39,Issue 10

  1. Fan, X.

    1. EDITOR'S CHOICEAdult Brain
      Open Access
      Clinical Value of Hybrid TOF-PET/MR Imaging–Based Multiparametric Imaging in Localizing Seizure Focus in Patients with MRI-Negative Temporal Lobe Epilepsy
      K. Shang, J. Wang, X. Fan, B. Cui, J. Ma, H. Yang, Y. Zhou, G. Zhao and J. Lu
      American Journal of Neuroradiology October 2018, 39 (10) 1791-1798; DOI: https://doi.org/10.3174/ajnr.A5814

      Twenty patients with MR imaging negative for temporal lobe epilepsy who underwent preoperative evaluation and 10 healthy controls were scanned using PET/MR imaging with simultaneous acquisition of PET and arterial spin-labeling. On the basis of the standard uptake value and CBF, receiver operating characteristic analysis and a logistic regression model were used to evaluate the predictive value for the localization. Complete concordance was noted in lateralization and localization among the PET, arterial spin-labeling, and histopathologic findings in 12/20 patients based on visual assessment. PET/MR imaging–based multiparametric imaging involving arterial spin-labeling may increase the clinical value of localizing the epileptogenic zone by providing concordant and complementary information.

  2. Faramand, A.M.

    1. Head & Neck
      CT versus MR Imaging in Estimating Cochlear Radiation Dose during Gamma Knife Surgery for Vestibular Schwannomas
      A.M. Faramand, H. Kano, S. Johnson, A. Niranjan, J.C. Flickinger and L.D. Lunsford
      American Journal of Neuroradiology October 2018, 39 (10) 1907-1911; DOI: https://doi.org/10.3174/ajnr.A5808

  3. Farina, D.

    1. FELLOWS' JOURNAL CLUBHead & Neck
      Correlation between Human Papillomavirus Status and Quantitative MR Imaging Parameters including Diffusion-Weighted Imaging and Texture Features in Oropharyngeal Carcinoma
      M. Ravanelli, A. Grammatica, E. Tononcelli, R. Morello, M. Leali, S. Battocchio, G.M. Agazzi, M. Buglione di Monale e Bastia, R. Maroldi, P. Nicolai and D. Farina
      American Journal of Neuroradiology October 2018, 39 (10) 1878-1883; DOI: https://doi.org/10.3174/ajnr.A5792

      A group of 59 patients with untreated histologically proved T2–T4 oropharyngeal squamous cell carcinoma were retrospectively analyzed. Human papillomavirus status was determined by viral DNA detection on tissue samples. MR imaging protocol included T2-weighted, contrast-enhanced T1-weighted, and DWI sequences. Parametric maps of ADC were obtained from DWI sequences. Texture analysis was performed on T2 and volumetric-interpolated brain examination sequences and on ADC maps. ADC was significantly lower in oropharyngeal squamous cell carcinoma positive for human papillomavirus compared with oropharyngeal squamous cell carcinoma negative for it. ADC and smoking status allowed noninvasive prediction of human papillomavirus status with a good accuracy.

  4. Fimmers, R.

    1. FELLOWS' JOURNAL CLUBAdult Brain
      Cerebrovascular Reactivity during Prolonged Breath-Hold in Experienced Freedivers
      V.C. Keil, L. Eichhorn, H.J.M.M. Mutsaerts, F. Träber, W. Block, B. Mädler, K. van de Ven, J.C.W. Siero, B.J. MacIntosh, J. Petr, R. Fimmers, H.H. Schild and E. Hattingen
      American Journal of Neuroradiology October 2018, 39 (10) 1839-1847; DOI: https://doi.org/10.3174/ajnr.A5790

      Fifteen male freedivers underwent repetitive 3T pseudocontinuous ASL and 31P-/1H-MR spectroscopy before, during, and after a 5-minute breath-hold (split into early and late phases) and gave temporally matching venous blood gas samples. The spatial coefficient of variation of CBF (by arterial spin-labeling) decreased during the early breath-hold phase whereas CBF remained almost stable during this phase and increased in the late phase. Cerebrovascular reactivity differed between the anterior and the posterior circulation during all phases. The cerebral energy metabolism of trained freedivers withstands severe hypoxic hypercarbia in prolonged breath-hold due to a complex cerebrovascular hemodynamic response.

  5. Fischer, U.

    1. FELLOWS' JOURNAL CLUBInterventional
      Open Access
      Reasons for Reperfusion Failures in Stent-Retriever-Based Thrombectomy: Registry Analysis and Proposal of a Classification System
      J. Kaesmacher, J. Gralla, P.J. Mosimann, F. Zibold, M.R. Heldner, E. Piechowiak, T. Dobrocky, M. Arnold, U. Fischer and P. Mordasini
      American Journal of Neuroradiology October 2018, 39 (10) 1848-1853; DOI: https://doi.org/10.3174/ajnr.A5759

      An intention-to-treat single-center cohort (n= 592) was re-evaluated for all patients in whom no reperfusion could be achieved (n = 63). Baseline characteristics were compared between patients with and without reperfusion failures. After qualitative review of all cases with reperfusion failures, a classification system was proposed and relative frequencies were reported. Reasons for reperfusion failure in stent-retriever thrombectomy are heterogeneous. The failure to establish intracranial or cervical access is almost as common as stent-retriever failure after establishing intracranial access. Systematic reporting standards of reasons may help to further estimate relative frequencies and thereby guide priorities.

  6. Flickinger, J.C.

    1. Head & Neck
      CT versus MR Imaging in Estimating Cochlear Radiation Dose during Gamma Knife Surgery for Vestibular Schwannomas
      A.M. Faramand, H. Kano, S. Johnson, A. Niranjan, J.C. Flickinger and L.D. Lunsford
      American Journal of Neuroradiology October 2018, 39 (10) 1907-1911; DOI: https://doi.org/10.3174/ajnr.A5808

  7. Foley, R.

    1. Comparison of Advanced Imaging Resources, Radiology Workforce, and Payment Methodologies between the United States and Canada
      H.A. Valand, S. Chu, R. Bhala, R. Foley, J.A. Hirsch and R.K. Tu
      American Journal of Neuroradiology October 2018, 39 (10) 1785-1790; DOI: https://doi.org/10.3174/ajnr.A5755

  8. Forman, C.

    1. Adult Brain
      Clinical Evaluation of Highly Accelerated Compressed Sensing Time-of-Flight MR Angiography for Intracranial Arterial Stenosis
      S.s. Lu, M. Qi, X. Zhang, X.h. Mu, M. Schmidt, Y. Sun, C. Forman, P. Speier and X.n. Hong
      American Journal of Neuroradiology October 2018, 39 (10) 1833-1838; DOI: https://doi.org/10.3174/ajnr.A5786

  9. Frazier, A.A.

    1. EDITOR'S CHOICEAdult Brain
      Open Access
      Longitudinal Persistence of Meningeal Enhancement on Postcontrast 7T 3D-FLAIR MRI in Multiple Sclerosis
      S.N. Jonas, I. Izbudak, A.A. Frazier and D.M. Harrison
      American Journal of Neuroradiology October 2018, 39 (10) 1799-1805; DOI: https://doi.org/10.3174/ajnr.A5796

      Thirty-one subjects with MS were prospectively scanned before and after intravenous contrast administration at 2 time points, approximately 1 year apart. Fifteen subjects in the cohort were scanned at another time approximately 1 year later. Foci of enhancement were categorized into 4 subtypes: subarachnoid spread/fill, subarachnoid nodular, vessel wall, and dural foci. Persistence ranged from 71%–100% at 1 year and 73%–100% at 2 years, depending on the enhancement pattern. Subarachnoid spread/fill and subarachnoid nodular subtypes persisted less often than vessel wall and dural foci. Longitudinal persistence of meningeal enhancement on 3D-FLAIR at 7T in MS varies by pattern of enhancement and correlates with worsening disability; however, it is not significantly different in those on/off treatment.

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