Index by author
Gralla, J.
- FELLOWS' JOURNAL CLUBInterventionalOpen AccessReasons for Reperfusion Failures in Stent-Retriever-Based Thrombectomy: Registry Analysis and Proposal of a Classification SystemJ. Kaesmacher, J. Gralla, P.J. Mosimann, F. Zibold, M.R. Heldner, E. Piechowiak, T. Dobrocky, M. Arnold, U. Fischer and P. MordasiniAmerican 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.
Grammatica, A.
- FELLOWS' JOURNAL CLUBHead & NeckYou have accessCorrelation between Human Papillomavirus Status and Quantitative MR Imaging Parameters including Diffusion-Weighted Imaging and Texture Features in Oropharyngeal CarcinomaM. 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. FarinaAmerican 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.
Guenette, J.P.
- Head & NeckOpen AccessMR Imaging of the Facial Nerve through the Temporal Bone at 3T with a Noncontrast Ultrashort Echo Time SequenceJ.P. Guenette, R.T. Seethamraju, J. Jayender, C.E. Corrales and T.C. LeeAmerican Journal of Neuroradiology October 2018, 39 (10) 1903-1906; DOI: https://doi.org/10.3174/ajnr.A5754
Guo, W.-Y.
- Adult BrainYou have accessPredicting Genotype and Survival in Glioma Using Standard Clinical MR Imaging Apparent Diffusion Coefficient Images: A Pilot Study from The Cancer Genome AtlasC.-C. Wu, R. Jain, A. Radmanesh, L.M. Poisson, W.-Y. Guo, D. Zagzag, M. Snuderl, D.G. Placantonakis, J. Golfinos and A.S. ChiAmerican Journal of Neuroradiology October 2018, 39 (10) 1814-1820; DOI: https://doi.org/10.3174/ajnr.A5794
Hamzei-sichani, F.
- InterventionalOpen AccessIdentification of Hostile Hemodynamics and Geometries of Cerebral Aneurysms: A Case-Control StudyB.J. Chung, F. Mut, C.M. Putman, F. Hamzei-Sichani, W. Brinjikji, D. Kallmes, C.M. Jimenez and J.R. CebralAmerican Journal of Neuroradiology October 2018, 39 (10) 1860-1866; DOI: https://doi.org/10.3174/ajnr.A5764
Han, M.
- PediatricsOpen AccessMultidelay Arterial Spin-Labeling MRI in Neonates and Infants: Cerebral Perfusion Changes during Brain MaturationH.G. Kim, J.H. Lee, J.W. Choi, M. Han, S.-M. Gho and Y. MoonAmerican Journal of Neuroradiology October 2018, 39 (10) 1912-1918; DOI: https://doi.org/10.3174/ajnr.A5774
Hanakita, S.
- InterventionalOpen AccessIntegrating 3D Rotational Angiography into Gamma Knife PlanningH. Hasegawa, S. Hanakita, M. Shin, M. Kawashima, T. Kin, W. Takahashi, M. Shojima, A.K. Nomoto, S. Aoki and N. SaitoAmerican Journal of Neuroradiology October 2018, 39 (10) 1867-1870; DOI: https://doi.org/10.3174/ajnr.A5763
Harrison, D.M.
- EDITOR'S CHOICEAdult BrainOpen AccessLongitudinal Persistence of Meningeal Enhancement on Postcontrast 7T 3D-FLAIR MRI in Multiple SclerosisS.N. Jonas, I. Izbudak, A.A. Frazier and D.M. HarrisonAmerican 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.
Hasegawa, H.
- InterventionalOpen AccessIntegrating 3D Rotational Angiography into Gamma Knife PlanningH. Hasegawa, S. Hanakita, M. Shin, M. Kawashima, T. Kin, W. Takahashi, M. Shojima, A.K. Nomoto, S. Aoki and N. SaitoAmerican Journal of Neuroradiology October 2018, 39 (10) 1867-1870; DOI: https://doi.org/10.3174/ajnr.A5763
Hattingen, E.
- FELLOWS' JOURNAL CLUBAdult BrainYou have accessCerebrovascular Reactivity during Prolonged Breath-Hold in Experienced FreediversV.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. HattingenAmerican 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.
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