American Journal of Neuroradiology: 39 (4)

Index by author

April 01, 2018; Volume 39,Issue 4

Ramasamy, D.P.
1. ADULT BRAIN
  
  You have access
  Evaluation of Leptomeningeal Contrast Enhancement Using Pre-and Postcontrast Subtraction 3D-FLAIR Imaging in Multiple Sclerosis
  R. Zivadinov, D.P. Ramasamy, J. Hagemeier, C. Kolb, N. Bergsland, F. Schweser, M.G. Dwyer, B. Weinstock-Guttman and D. Hojnacki
  
  American Journal of Neuroradiology April 2018, 39 (4) 642-647; DOI: https://doi.org/10.3174/ajnr.A5541
Rangel-castilla, L.
1. INTERVENTIONAL
  
  Open Access
  A Patient Dose-Reduction Technique for Neuroendovascular Image-Guided Interventions: Image-Quality Comparison Study
  A. Sonig, S.V. Setlur Nagesh, V.S. Fennell, S. Gandhi, L. Rangel-Castilla, C.N. Ionita, K.V. Snyder, L.N. Hopkins, D.R. Bednarek, S. Rudin, A.H. Siddiqui and E.I. Levy
  
  American Journal of Neuroradiology April 2018, 39 (4) 734-741; DOI: https://doi.org/10.3174/ajnr.A5552
Ranjeva, J.-P.
1. EDITOR'S CHOICEADULT BRAIN
  
  Open Access
  Evaluation of the Sensitivity of Inhomogeneous Magnetization Transfer (ihMT) MRI for Multiple Sclerosis
  E. Van Obberghen, S. Mchinda, A. le Troter, V.H. Prevost, P. Viout, M. Guye, G. Varma, D.C. Alsop, J.-P. Ranjeva, J. Pelletier, O. Girard and G. Duhamel
  
  American Journal of Neuroradiology April 2018, 39 (4) 634-641; DOI: https://doi.org/10.3174/ajnr.A5563
  
  Twenty-five patients with relapsing-remitting MS and 20 healthy volunteers were enrolled in a prospective study with a protocol including anatomic imaging, standard magnetization transfer, and inhomogeneous magnetization transfer imaging. Magnetization transfer and inhomogeneous magnetization transfer ratios measured in normal-appearing brain tissue and in MS lesions of patients were compared with values measured in controls. The magnetization transfer ratio and inhomogeneous magnetization transfer ratio measured in the thalami and frontal, occipital, and temporal WM of patients with MS were lower compared with those of controls. The sensitivity of the inhomogeneous magnetization transfer technique for MS was highlighted by the reduction in the inhomogeneous magnetization transfer ratio in MS lesions and in normal-appearing WM of patients compared with controls.
Regli, L.
1. EDITOR'S CHOICEADULT BRAIN
  
  Open Access
  Quantification of Intracranial Aneurysm Volume Pulsation with 7T MRI
  R. Kleinloog, J.J.M. Zwanenburg, B. Schermers, E. Krikken, Y.M. Ruigrok, P.R. Luijten, F. Visser, L. Regli, G.J.E. Rinkel and B.H. Verweij
  
  American Journal of Neuroradiology April 2018, 39 (4) 713-719; DOI: https://doi.org/10.3174/ajnr.A5546
  
  Tenunruptured aneurysms in 9 patients were studied using a high-resolution 3D gradient-echo sequence with cardiac gating. Semiautomatic segmentation was used to measure aneurysm volume per cardiac phase. Aneurysm pulsation was defined as the relative increase in volume between the phase with the smallest volume and the phase with the largest volume. The accuracy and precision of the measured volume pulsations were addressed by digital phantom simulations and a repeat image analysis. In Stage II, the imaging protocol was optimized and 9 patients with 9 aneurysms were studied with and without administration of a contrast agent. Mean aneurysm pulsation in Stage I was 8%, with a mean volume change of 15 mm³. The artifactual volume pulsations measured with the digital phantom simulations were of the same magnitude as the volume pulsations observed in the patient data. Volume pulsation quantification with the current imaging protocol on 7T MR imaging is not accurate due to multiple imaging artifacts.
Rehani, B.
1. ADULT BRAIN
  
  You have access
  Utility of Repeat Head CT in Patients with Blunt Traumatic Brain Injury Presenting with Small Isolated Falcine or Tentorial Subdural Hematomas
  K.K. Devulapalli, J.F. Talbott, J. Narvid, A. Gean, B. Rehani, G. Manley, A. Uzelac, E. Yuh and M.C. Huang
  
  American Journal of Neuroradiology April 2018, 39 (4) 654-657; DOI: https://doi.org/10.3174/ajnr.A5557
Reich, D.S.
1. ADULT BRAIN
  
  Open Access
  An Automated Statistical Technique for Counting Distinct Multiple Sclerosis Lesions
  J.D. Dworkin, K.A. Linn, I. Oguz, G.M. Fleishman, R. Bakshi, G. Nair, P.A. Calabresi, R.G. Henry, J. Oh, N. Papinutto, D. Pelletier, W. Rooney, W. Stern, N.L. Sicotte, D.S. Reich and R.T. Shinohara the North American Imaging in Multiple Sclerosis Cooperative
  
  American Journal of Neuroradiology April 2018, 39 (4) 626-633; DOI: https://doi.org/10.3174/ajnr.A5556
Repovic, P.
1. EDITOR'S CHOICEADULT BRAIN
  
  Open Access
  Iron-Insensitive Quantitative Assessment of Subcortical Gray Matter Demyelination in Multiple Sclerosis Using the Macromolecular Proton Fraction
  V.L. Yarnykh, E.P. Krutenkova, G. Aitmagambetova, P. Repovic, A. Mayadev, P. Qian, L.K. Jung Henson, B. Gangadharan and J.D. Bowen
  
  American Journal of Neuroradiology April 2018, 39 (4) 618-625; DOI: https://doi.org/10.3174/ajnr.A5542
  
  Fast macromolecular proton fraction mapping is a recent quantitative MR imaging method for myelin assessment. Macromolecular proton fraction and T2* maps were obtained from 12 healthy controls, 18 patients with relapsing-remitting MS, and 12 patients with secondary-progressive MS using 3T MR imaging. The macromolecular proton fraction in all subcortical structures and T2* in the globus pallidus, putamen, and caudate nucleus demonstrated a significant monotonic decrease from controls to patients with relapsing-remitting MS and from those with relapsing-remitting MS to patients with secondary-progressive MS. The macromolecular proton fraction in all subcortical structures significantly correlated with the Expanded Disability Status Scale and MS Functional Composite scores and provides an iron-insensitive measure of demyelination.
Riedel, C.
1. ADULT BRAIN
  
  You have access
  Quantitative Phase-Contrast MR Angiography to Measure Hemodynamic Changes in Idiopathic Intracranial Hypertension
  J. Juhász, T. Lindner, C. Riedel, N.G. Margraf, O. Jansen and A. Rohr
  
  American Journal of Neuroradiology April 2018, 39 (4) 682-686; DOI: https://doi.org/10.3174/ajnr.A5571
Rinkel, G.J.E.
1. EDITOR'S CHOICEADULT BRAIN
  
  Open Access
  Quantification of Intracranial Aneurysm Volume Pulsation with 7T MRI
  R. Kleinloog, J.J.M. Zwanenburg, B. Schermers, E. Krikken, Y.M. Ruigrok, P.R. Luijten, F. Visser, L. Regli, G.J.E. Rinkel and B.H. Verweij
  
  American Journal of Neuroradiology April 2018, 39 (4) 713-719; DOI: https://doi.org/10.3174/ajnr.A5546
  
  Tenunruptured aneurysms in 9 patients were studied using a high-resolution 3D gradient-echo sequence with cardiac gating. Semiautomatic segmentation was used to measure aneurysm volume per cardiac phase. Aneurysm pulsation was defined as the relative increase in volume between the phase with the smallest volume and the phase with the largest volume. The accuracy and precision of the measured volume pulsations were addressed by digital phantom simulations and a repeat image analysis. In Stage II, the imaging protocol was optimized and 9 patients with 9 aneurysms were studied with and without administration of a contrast agent. Mean aneurysm pulsation in Stage I was 8%, with a mean volume change of 15 mm³. The artifactual volume pulsations measured with the digital phantom simulations were of the same magnitude as the volume pulsations observed in the patient data. Volume pulsation quantification with the current imaging protocol on 7T MR imaging is not accurate due to multiple imaging artifacts.
Rohr, A.
1. ADULT BRAIN
  
  You have access
  Quantitative Phase-Contrast MR Angiography to Measure Hemodynamic Changes in Idiopathic Intracranial Hypertension
  J. Juhász, T. Lindner, C. Riedel, N.G. Margraf, O. Jansen and A. Rohr
  
  American Journal of Neuroradiology April 2018, 39 (4) 682-686; DOI: https://doi.org/10.3174/ajnr.A5571

Main menu

User menu

Search

American Journal of Neuroradiology

Index by author

Ramasamy, D.P.

Rangel-castilla, L.

Ranjeva, J.-P.

Regli, L.

Rehani, B.

Reich, D.S.

Repovic, P.

Riedel, C.

Rinkel, G.J.E.

Rohr, A.

In this issue

News and Updates

Resources

Opportunities

American Society of Neuroradiology