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AJNR. American Journal of Neuroradiology

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https://www.readbyqxmd.com/read/29773569/mobile-stroke-unit-reduces-time-to-image-acquisition-and-reporting
#1
E M Nyberg, J R Cox, R G Kowalski, D V Duarte, B Schimpf, W J Jones
Timely administration of thrombolytic therapy is critical to maximizing the likelihood of favorable outcomes in patients with acute ischemic stroke. Although emergency medical service activation overall improves the timeliness of acute stroke treatment, the time from emergency medical service dispatch to hospital arrival unavoidably decreases the timeliness of thrombolytic administration. Our mobile stroke unit, a new-generation ambulance with on-board CT scanning capability, reduces key imaging time metrics and facilitates in-the-field delivery of IV thrombolytic therapy...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773568/radiation-induced-myelitis-initial-and-follow-up-mri-and-clinical-features-in-patients-at-a-single-tertiary-care-institution-during-20-years
#2
M Khan, P Ambady, D Kimbrough, T Shoemaker, S Terezakis, J Blakeley, S D Newsome, I Izbudak
Myelitis is a rare complication of radiation exposure to the spinal cord and is often a diagnosis of exclusion. A retrospective review of clinical records and serial imaging was performed to identify subjects with documented myelitis and a history of prior radiation. Eleven patients fulfilled the inclusion criteria. All patients had longitudinally extensive cord involvement with homogeneous precontrast T1 hyperintense signal in the adjacent vertebrae, corresponding to the radiation field. T2 signal abnormalities involving the central two-thirds of the cord were seen in 6/11 patients (55%)...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773567/balanced-steady-state-free-precession-sequence-ciss-fiesta-3d-driven-equilibrium-radiofrequency-reset-pulse-increases-the-diagnostic-yield-for-spinal-drop-metastases-in-children-with-brain-tumors
#3
K Buch, P Caruso, D Ebb, S Rincon
BACKGROUND AND PURPOSE: Identification of spinal drop metastases is important in the staging and management of pediatric patients with primary brain tumors. Our aim was to assess the diagnostic utility of the balanced steady-state free precession (bSSFP) sequence (CISS/FIESTA/3D driven equilibrium radiofrequency reset pulse) for the detection of spinal drop metastases in pediatric patients with primary intracranial tumors. MATERIALS AND METHODS: This was a retrospective study of 44 pediatric patients with primary intracranial tumors undergoing MR imaging spine evaluation for drop metastases before radiation treatment...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773566/multisociety-consensus-quality-improvement-revised-consensus-statement-for-endovascular-therapy-of-acute-ischemic-stroke-from-the-american-association-of-neurological-surgeons-aans-american-society-of-neuroradiology-asnr-cardiovascular-and-interventional-radiology
#4
https://www.readbyqxmd.com/read/29773565/another-important-pitfall-in-the-diagnosis-of-dural-sinus-thrombosis-in-neonates
#5
LETTER
A Hakim, F Wagner
No abstract text is available yet for this article.
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773564/rapid-sequence-mri-of-the-brain-a-distinct-imaging-study
#6
LETTER
C M Pfeifer
No abstract text is available yet for this article.
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773563/prediction-of-borderzone-infarction-by-cta-in-patients-undergoing-carotid-embolization-for-carotid-blowout
#7
B-C Lee, Y-H Lin, C-W Lee, H-M Liu, A Huang
BACKGROUND AND PURPOSE: Permanent common carotid artery and/or ICA occlusion is an effective treatment for carotid blowout syndrome. Besides postoperative thromboembolic infarction, permanent common carotid artery and/or ICA occlusion may cause borderzone infarction when the collateral flow to the deprived brain territory is inadequate. In this study, we aimed to test the predictive value of CTA for post-permanent common carotid artery and/or ICA occlusion borderzone infarction in patients with carotid blowout syndrome...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773562/neuroimaging-findings-of-zika-virus-associated-neurologic-complications-in-adults
#8
REVIEW
L C Hygino da Cruz, O J M Nascimento, F P P L Lopes, I R F da Silva
When the first suspected cases of neurologic disorders associated with the Zika virus were noticed in Brazil in late 2015, several studies had been conducted to understand the pathophysiology of the disease and its associated complications. In addition to its well-established association with microcephaly in neonates, the Zika virus infection has also been suggested to trigger other severe neurologic complications in adults, such as Guillain-Barré syndrome, radiculomyelitis, and meningoencephalitis. Hence, the Zika virus should be deemed a global threat that can cause devastating neurologic complications among individuals in all age ranges...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29773561/postnatal-brain-growth-assessed-by-sequential-cranial-ultrasonography-in-infants-born-30-weeks-gestational-age
#9
R Cuzzilla, A J Spittle, K J Lee, S Rogerson, F M Cowan, L W Doyle, J L Y Cheong
BACKGROUND AND PURPOSE: Brain growth in the early postnatal period following preterm birth has not been well described. This study of infants born at <30 weeks' gestational age and without major brain injury aimed to accomplish the following: 1) assess the reproducibility of linear measures made from cranial ultrasonography, 2) evaluate brain growth using sequential cranial ultrasonography linear measures from birth to term-equivalent age, and 3) explore perinatal predictors of postnatal brain growth...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748208/relationship-between-cough-associated-changes-in-csf-flow-and-disease-severity-in-chiari-i-malformation-an-exploratory-study-using-real-time-mri
#10
A F Bezuidenhout, D Khatami, C B Heilman, E M Kasper, S Patz, N Madan, Y Zhao, R A Bhadelia
BACKGROUND AND PURPOSE: Currently no quantitative objective test exists to determine disease severity in a patient with Chiari I malformation. Our aim was to correlate disease severity in symptomatic patients with Chiari I malformation with cough-associated changes in CSF flow as measured with real-time MR imaging. MATERIALS AND METHODS: Thirteen symptomatic patients with Chiari I malformation (tonsillar herniation of ≥5 mm) were prospectively studied. A real-time, flow-sensitized pencil-beam MR imaging scan was used to measure CSF stroke volume during rest and immediately following coughing and relaxation periods (total scan time, 90 seconds)...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748207/use-of-diffusional-kurtosis-imaging-and-dynamic-contrast-enhanced-mr-imaging-to-predict-posttraumatic-epilepsy-in-rabbits
#11
W Li, X Wang, X Wei, M Wang
BACKGROUND AND PURPOSE: Finding a reliable biomarker to thoroughly assess the brain structure changes in posttraumatic epilepsy is of great importance. Our aim was to explore the value of diffusional kurtosis imaging combined with dynamic contrast-enhanced MR imaging in the evaluation of posttraumatic epilepsy. MATERIALS AND METHODS: A modified weight-drop device was used to induce traumatic brain injury. Rabbits were exposed to traumatic brain injury or sham injury...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748206/deep-learning-convolutional-neural-networks-accurately-classify-genetic-mutations-in-gliomas
#12
P Chang, J Grinband, B D Weinberg, M Bardis, M Khy, G Cadena, M-Y Su, S Cha, C G Filippi, D Bota, P Baldi, L M Poisson, R Jain, D Chow
BACKGROUND AND PURPOSE: The World Health Organization has recently placed new emphasis on the integration of genetic information for gliomas. While tissue sampling remains the criterion standard, noninvasive imaging techniques may provide complimentary insight into clinically relevant genetic mutations. Our aim was to train a convolutional neural network to independently predict underlying molecular genetic mutation status in gliomas with high accuracy and identify the most predictive imaging features for each mutation...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748205/cerebral-perfusion-is-perturbed-by-preterm-birth-and-brain-injury
#13
E S Mahdi, M Bouyssi-Kobar, M B Jacobs, J Murnick, T Chang, C Limperopoulos
BACKGROUND AND PURPOSE: Early disturbances in systemic and cerebral hemodynamics are thought to mediate prematurity-related brain injury. However, the extent to which CBF is perturbed by preterm birth is unknown. Our aim was to compare global and regional CBF in preterm infants with and without brain injury on conventional MR imaging using arterial spin-labeling during the third trimester of ex utero life and to examine the relationship between clinical risk factors and CBF. MATERIALS AND METHODS: We prospectively enrolled preterm infants younger than 32 weeks' gestational age and <1500 g and performed arterial spin-labeling MR imaging studies...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748204/a-qualitative-and-quantitative-correlation-study-of-lumbar-intervertebral-disc-degeneration-using-glycosaminoglycan-chemical-exchange-saturation-transfer-pfirrmann-grade-and-t1-%C3%AF
#14
O Togao, A Hiwatashi, T Wada, K Yamashita, K Kikuchi, C Tokunaga, J Keupp, M Yoneyama, H Honda
BACKGROUND AND PURPOSE: Glycosaminoglycan chemical exchange saturation transfer (gagCEST) imaging allows the direct measurement and mapping of glycosaminoglycans. In this study, we aimed to evaluate the usefulness of gagCEST imaging in the quantitative assessment of intervertebral disc degeneration in a comparison with Pfirrmann grade and T1-ρ measurements. MATERIALS AND METHODS: Ninety-six lumbar intervertebral discs in 24 volunteers (36.0 ± 8.5 years of age, 21 men and 3 women) were examined with both gagCEST imaging and T1-ρ measurements...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748203/comparative-analysis-of-diffusional-kurtosis-imaging-diffusion-tensor-imaging-and-diffusion-weighted-imaging-in-grading-and-assessing-cellular-proliferation-of-meningiomas
#15
L Lin, R Bhawana, Y Xue, Q Duan, R Jiang, H Chen, X Chen, B Sun, H Lin
BACKGROUND AND PURPOSE: An accurate evaluation of the World Health Organization grade and cellular proliferation is particularly important in meningiomas. Our aim was to prospectively evaluate and compare diffusional kurtosis imaging, DTI, and DWI metrics in determining the grade and cellular proliferation of meningiomas. MATERIALS AND METHODS: Ninety-six consecutive patients with histopathologically confirmed meningiomas were included in this study. Mean kurtosis, radial kurtosis, axial kurtosis, fractional anisotropy, mean diffusivity, and ADC were semiautomatically obtained in the solid components of tumors...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748202/mri-based-methods-for-spinal-cord-atrophy-evaluation-a-comparison-of-cervical-cord-cross-sectional-area-cervical-cord-volume-and-full-spinal-cord-volume-in-patients-with-aquaporin-4-antibody-seropositive-neuromyelitis-optica-spectrum-disorders
#16
C Chien, A U Brandt, F Schmidt, J Bellmann-Strobl, K Ruprecht, F Paul, M Scheel
BACKGROUND AND PURPOSE: Measures for spinal cord atrophy have become increasingly important as imaging biomarkers in the assessment of neuroinflammatory diseases, especially in neuromyelitis optica spectrum disorders. The most commonly used method, mean upper cervical cord area, is relatively easy to measure and can be performed on brain MRIs that capture cervical myelon. Measures of spinal cord volume (eg, cervical cord volume or total cord volume) require longer scanning and more complex analysis but are potentially better suited as spinal cord atrophy measures...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748201/quantitative-assessment-of-normal-fetal-brain-myelination-using-fast-macromolecular-proton-fraction-mapping
#17
V L Yarnykh, I Y Prihod'ko, A A Savelov, A M Korostyshevskaya
BACKGROUND AND PURPOSE: Fast macromolecular proton fraction mapping is a recently emerged MRI method for quantitative myelin imaging. Our aim was to develop a clinically targeted technique for macromolecular proton fraction mapping of the fetal brain and test its capability to characterize normal prenatal myelination. MATERIALS AND METHODS: This prospective study included 41 pregnant women (gestational age range, 18-38 weeks) without abnormal findings on fetal brain MR imaging performed for clinical indications...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29748200/extent-of-microstructural-tissue-damage-correlates-with-hemodynamic-failure-in-high-grade-carotid-occlusive-disease-an-mri-study-using-quantitative-t2-and-dsc-perfusion
#18
A Seiler, R Deichmann, U Nöth, A Lauer, W Pfeilschifter, O C Singer, M Wagner
BACKGROUND AND PURPOSE: Chronic hemodynamic impairment in high-grade carotid occlusive disease is thought to cause microstructural abnormalities that might be subclinical or lead to subtle symptoms including cognitive impairment. Quantitative MR imaging allows assessing pathologic structural changes beyond macroscopically visible tissue damage. In this study, high-resolution quantitative T2 mapping combined with DSC-based PWI was used to investigate quantitative T2 changes as a potential marker of microstructural damage in relation to hemodynamic impairment in patients with unilateral high-grade carotid occlusive disease...
May 10, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29724768/identification-of-chronic-active-multiple-sclerosis-lesions-on-3t-mri
#19
M Absinta, P Sati, A Fechner, M K Schindler, G Nair, D S Reich
BACKGROUND AND PURPOSE: MR imaging-pathologic studies have reported that paramagnetic rims on 7T susceptibility-based MR imaging identify, in vivo, the subset of MS lesions with compartmentalized inflammation at the lesion edge and associated remyelination failure. Here, we assessed the reliability of detecting these rims on high-resolution 3T phase images. MATERIALS AND METHODS: High-resolution T2* and phase MR imaging was collected in 20 patients with MS at 3T (3D segmented EPI, 0...
May 3, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29724767/role-of-the-apparent-diffusion-coefficient-as-a-predictor-of-tumor-progression-in-patients-with-chordoma
#20
T Sasaki, T Moritani, A Belay, A A Capizzano, S P Sato, Y Sato, P Kirby, S Ishitoya, A Oya, M Toda, K Takahashi
BACKGROUND AND PURPOSE: Diffusion-weighted imaging may aid in distinguishing aggressive chordoma from nonaggressive chordoma. This study explores the prognostic role of the apparent diffusion coefficient in chordomas. MATERIALS AND METHODS: Sixteen patients with residual or recurrent chordoma were divided postoperatively into those with an aggressive tumor, defined as a growing tumor having a doubling time of <1 year, and those with a nonaggressive tumor on follow-up MR images...
May 3, 2018: AJNR. American Journal of Neuroradiology
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