Index by author
Park, H.-J.
- Pediatric NeuroimagingOpen AccessChanges of Neurotransmitters in Youth with Internet and Smartphone Addiction: A Comparison with Healthy Controls and Changes after Cognitive Behavioral TherapyH.S. Seo, E.-K. Jeong, S. Choi, Y. Kwon, H.-J. Park and I. KimAmerican Journal of Neuroradiology July 2020, 41 (7) 1293-1301; DOI: https://doi.org/10.3174/ajnr.A6632
Patel, A.B.
- NeurointerventionOpen AccessPreserving Access: A Review of Stroke Thrombectomy during the COVID-19 PandemicT.M. Leslie-Mazwi, K.M. Fargen, M. Levitt, C.P. Derdeyn, S.K. Feske, A.B. Patel and J.A. HirschAmerican Journal of Neuroradiology July 2020, 41 (7) 1136-1141; DOI: https://doi.org/10.3174/ajnr.A6606
Patel, M.R.
- FELLOWS' JOURNAL CLUBHead and Neck ImagingYou have accessPosttreatment Imaging in Patients with Head and Neck Cancer without Clinical Evidence of Recurrence: Should Surveillance Imaging Extend Beyond 6 Months?A. Gore, K. Baugnon, J. Beitler, N.F. Saba, M.R. Patel, X. Wu, B.J. Boyce and A.H. AikenAmerican Journal of Neuroradiology July 2020, 41 (7) 1238-1244; DOI: https://doi.org/10.3174/ajnr.A6614
The authors performed a retrospective data base search that queried neck CT reports with Neck Imaging Reporting and Data Systems scores of 2–4 from June 2014 to March 2018. The electronic medical records were reviewed to determine outcomes of clinical and radiologic follow-up, including symptoms, physical examination findings, pathologic correlation, and clinical notes within 3 months of imaging. A total of 255 cases all with NIRADS scores of 2 or 3 met the inclusion criteria. Fifty-nine patients (23%) demonstrated recurrence, and 21 patients (36%) had clinically occult recurrence. The median overall time to radiologically detected, clinically occult recurrence was 11.4 months from treatment completion. They conclude that imaging surveillance beyond the first posttreatment baseline study was critical for detecting clinically occult recurrent disease in patients with head and neck squamous cell carcinoma. More than one-third of all recurrences were seen in patients without clinical evidence of disease.
Peper, E.S.
- EDITOR'S CHOICEAdult BrainOpen AccessHigh Spatiotemporal Resolution 4D Flow MRI of Intracranial Aneurysms at 7T in 10 MinutesL.M. Gottwald, J. Töger, K. Markenroth Bloch, E.S. Peper, B.F. Coolen, G.J. Strijkers, P. van Ooij and A.J. NederveenAmerican Journal of Neuroradiology July 2020, 41 (7) 1201-1208; DOI: https://doi.org/10.3174/ajnr.A6603
The authors used pseudospiral Cartesian undersampling with compressed sensing reconstruction to achieve high spatiotemporal resolution (0.5mm isotropic, ∼30 ms) in a scan time of 10 minutes. They analyzed the repeatability of accelerated 4D-flow scans and compared flow rates, stroke volume, and the pulsatility index with 2D-flow and conventional 4D-flow MR imaging in a flow phantom and 15 healthy subjects. Mean flow-rate bias compared with 2D-flow was lower for accelerated than for conventional 4D-flow MR imaging. Pulsatility index bias gave similar results. Stroke volume bias showed no difference from accelerated bias for conventional 4D-flow MR imaging. Repeatability for accelerated 4D-flow was similar to that of 2D-flow MR imaging. They conclude that highly accelerated high-spatiotemporal-resolution 4D-flow MR imaging at 7T in intracranial arteries and aneurysms provides repeatable and accurate quantitative flow values.
Peschi, G.
- FELLOWS' JOURNAL CLUBSpine Imaging and Spine Image-Guided InterventionsYou have accessSpine MRI in Spontaneous Intracranial Hypotension for CSF Leak Detection: Nonsuperiority of Intrathecal Gadolinium to Heavily T2-Weighted Fat-Saturated SequencesT. Dobrocky, A. Winklehner, P.S. Breiding, L. Grunder, G. Peschi, L. Häni, P.J. Mosimann, M. Branca, J. Kaesmacher, P. Mordasini, A. Raabe, C.T. Ulrich, J. Beck, J. Gralla and E.I. PiechowiakAmerican Journal of Neuroradiology July 2020, 41 (7) 1309-1315; DOI: https://doi.org/10.3174/ajnr.A6592
The authors performed a retrospective study of patients with spontaneous intracranial hypotension examined from February 2013 to October 2017. The spine MR imaging was reviewed by 3 blinded readers for the presence of epidural CSF using 3 different sequences (T2WI, 3D T2WI fat-saturated, T1WI gadolinium). In patients with leaks, the presumed level of the leak was reported. They conclude that intrathecal gadolinium-enhanced spine MR imaging does not improve the diagnostic accuracy for the detection of epidural CSF. Gadolinium myelography lacks a rationale to be included in the routine spontaneous intracranial hypotension work-up. Heavily T2-weighted images with fat saturation provide high accuracy for the detection of an epidural CSF collection.
Pettersson, D.R.
- Adult BrainOpen AccessDistinguishing Extravascular from Intravascular Ferumoxytol Pools within the Brain: Proof of Concept in Patients with Treated GlioblastomaR.F. Barajas, D. Schwartz, H.L. McConnell, C.N. Kersch, X. Li, B.E. Hamilton, J. Starkey, D.R. Pettersson, J.P. Nickerson, J.M. Pollock, R.F. Fu, A. Horvath, L. Szidonya, C.G. Varallyay, J.J. Jaboin, A.M. Raslan, A. Dogan, J.S. Cetas, J. Ciporen, S.J. Han, P. Ambady, L.L. Muldoon, R. Woltjer, W.D. Rooney and E.A. NeuweltAmerican Journal of Neuroradiology July 2020, 41 (7) 1193-1200; DOI: https://doi.org/10.3174/ajnr.A6600
Piechowiak, E.I.
- FELLOWS' JOURNAL CLUBSpine Imaging and Spine Image-Guided InterventionsYou have accessSpine MRI in Spontaneous Intracranial Hypotension for CSF Leak Detection: Nonsuperiority of Intrathecal Gadolinium to Heavily T2-Weighted Fat-Saturated SequencesT. Dobrocky, A. Winklehner, P.S. Breiding, L. Grunder, G. Peschi, L. Häni, P.J. Mosimann, M. Branca, J. Kaesmacher, P. Mordasini, A. Raabe, C.T. Ulrich, J. Beck, J. Gralla and E.I. PiechowiakAmerican Journal of Neuroradiology July 2020, 41 (7) 1309-1315; DOI: https://doi.org/10.3174/ajnr.A6592
The authors performed a retrospective study of patients with spontaneous intracranial hypotension examined from February 2013 to October 2017. The spine MR imaging was reviewed by 3 blinded readers for the presence of epidural CSF using 3 different sequences (T2WI, 3D T2WI fat-saturated, T1WI gadolinium). In patients with leaks, the presumed level of the leak was reported. They conclude that intrathecal gadolinium-enhanced spine MR imaging does not improve the diagnostic accuracy for the detection of epidural CSF. Gadolinium myelography lacks a rationale to be included in the routine spontaneous intracranial hypotension work-up. Heavily T2-weighted images with fat saturation provide high accuracy for the detection of an epidural CSF collection.
Pierot, L.
- NeurointerventionYou have accessPersistent Blood Flow inside the Woven EndoBridge Device More Than 6 Months after Intracranial Aneurysm Treatment: Frequency, Mechanisms, and Management—A Retrospective Single-Center StudyH.A. Nguyen, S. Soize, P.-F. Manceau, L. Vudang and L. PierotAmerican Journal of Neuroradiology July 2020, 41 (7) 1225-1231; DOI: https://doi.org/10.3174/ajnr.A6593
Polavarapu, K.
- Pediatric NeuroimagingYou have accessIn Vivo Evaluation of White Matter Abnormalities in Children with Duchenne Muscular Dystrophy Using DTIV. Preethish-Kumar, A. Shah, M. Kumar, M. Ingalhalikar, K. Polavarapu, M. Afsar, J. Rajeswaran, S. Vengalil, S. Nashi, P.T. Thomas, A. Sadasivan, M. Warrier, A. Nalini and J. SainiAmerican Journal of Neuroradiology July 2020, 41 (7) 1271-1278; DOI: https://doi.org/10.3174/ajnr.A6604
Pollock, J.M.
- Adult BrainOpen AccessDistinguishing Extravascular from Intravascular Ferumoxytol Pools within the Brain: Proof of Concept in Patients with Treated GlioblastomaR.F. Barajas, D. Schwartz, H.L. McConnell, C.N. Kersch, X. Li, B.E. Hamilton, J. Starkey, D.R. Pettersson, J.P. Nickerson, J.M. Pollock, R.F. Fu, A. Horvath, L. Szidonya, C.G. Varallyay, J.J. Jaboin, A.M. Raslan, A. Dogan, J.S. Cetas, J. Ciporen, S.J. Han, P. Ambady, L.L. Muldoon, R. Woltjer, W.D. Rooney and E.A. NeuweltAmerican Journal of Neuroradiology July 2020, 41 (7) 1193-1200; DOI: https://doi.org/10.3174/ajnr.A6600