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Journals AJNR. American Journal of Neur...

AJNR. American Journal of Neuroradiology

https://read.qxmd.com/read/38604737/a-comprehensive-and-broad-approach-to-resting-state-functional-connectivity-in-adult-patients-with-mild-traumatic-brain-injury
#1
JOURNAL ARTICLE
Soroush Arabshahi, Sohae Chung, Alaleh Alivar, Prin X Amorapanth, Steven R Flanagan, Farng-Yang A Foo, Andrew F Laine, Yvonne W Lui
BACKGROUND AND PURPOSE: Several recent works using resting-state fMRI suggest possible alterations of resting-state functional connectivity after mild traumatic brain injury. However, the literature is plagued by various analysis approaches and small study cohorts, resulting in an inconsistent array of reported findings. In this study, we aimed to investigate differences in whole-brain resting-state functional connectivity between adult patients with mild traumatic brain injury within 1 month of injury and healthy control subjects using several comprehensive resting-state functional connectivity measurement methods and analyses...
April 11, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38604736/identification-of-multiclass-pediatric-low-grade-neuroepithelial-tumor-molecular-subtype-with-adc-mr-imaging-and-machine-learning
#2
JOURNAL ARTICLE
Matheus D Soldatelli, Khashayar Namdar, Uri Tabori, Cynthia Hawkins, Kristen Yeom, Farzad Khalvati, Birgit B Ertl-Wagner, Matthias W Wagner
BACKGROUND AND PURPOSE: Molecular biomarker identification increasingly influences the treatment planning of pediatric low-grade neuroepithelial tumors (PLGNTs). We aimed to develop and validate a radiomics-based ADC signature predictive of the molecular status of PLGNTs. MATERIALS AND METHODS: In this retrospective bi-institutional study, we searched the PACS for baseline brain MRIs from children with PLGNTs. Semiautomated tumor segmentation on ADC maps was performed using the semiautomated level tracing effect tool with 3D Slicer...
April 11, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38604735/imaging-outcomes-of-emergency-mr-imaging-in-dizziness-and-vertigo-a-retrospective-cohort-study
#3
JOURNAL ARTICLE
Tatu Happonen, Mikko Nyman, Pauli Ylikotila, Kimmo Mattila, Jussi Hirvonen
BACKGROUND AND PURPOSE: Patients exhibiting acute dizziness or vertigo often represent a diagnostic challenge, and many undergo neuroimaging for stroke detection. We aimed to demonstrate the imaging outcomes of first-line emergency MR imaging among patients with acute dizziness or vertigo and to determine the clinical risk factors for stroke and other acute pathology. MATERIALS AND METHODS: This retrospective study included consecutive patients with acute dizziness or vertigo referred for emergency MR imaging in a tertiary hospital during 5 years...
April 11, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38604734/dotatate-pet-mr-imaging-differentiates-secondary-progressive-from-de-novo-world-health-organization-grade-3-meningiomas
#4
JOURNAL ARTICLE
Joon Tae Kim, Se Jung Chris Chang, Arsalan Haghdel, Rohan R Ramakrishna, Susan C Pannullo, Theodore H Schwartz, Joseph R Osborne, Rajiv S Magge, Howard A Fine, Babacar Cisse, Philip Stieg, Eaton Lin, Michelle Roytman, Joshua D Palmer, Nicolas A Karakatsanis, David Pisapia, Benjamin Liechty, Jonathan P S Knisely, Jana Ivanidze
BACKGROUND AND PURPOSE: WHO grade 3 meningiomas are rare and poorly understood and have a higher propensity for recurrence, metastasis, and worsened clinical outcomes compared with lower-grade meningiomas. The purpose of our study was to prospectively evaluate the molecular profile, PET characteristics, and outcomes of patients with World Health Organization grade 3 meningiomas who were imaged with gallium 68 (68 Ga) DOTATATE PET/MR imaging. MATERIALS AND METHODS: Patients with World Health Organization grade 3 meningiomas enrolled in our prospective observational cohort evaluating the utility of (68 Ga) DOTATATE PET/MR imaging in somatostatin receptor positive brain tumors were included...
April 11, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38604733/impact-of-susan-denoising-and-combat-harmonization-on-machine-learning-model-performance-for-malignant-brain-neoplasms
#5
JOURNAL ARTICLE
Girish Bathla, Neetu Soni, Ian T Mark, Yanan Liu, Nicholas B Larson, Blake A Kassmeyer, Suyash Mohan, John C Benson, Saima Rathore, Amit Agarwal
BACKGROUND AND PURPOSE: Feature variability in radiomics studies due to technical and magnet strength parameters is well known and may be addressed through various pre-processing methods. However, very few studies have evaluated downstream impact of variable pre-processing on model classification performance in a multi-class setting. We sought to evaluate the impact of SUSAN denoising and ComBat harmonization on model classification performance. MATERIALS AND METHODS: A total of 493 cases (410 internal and 83 external dataset) of glioblastoma (GB), intracranial metastatic disease (IMD) and primary CNS lymphoma (PCNSL) underwent semi-automated 3D-segmentation post baseline image processing (BIP) consisting of resampling, realignment, co-registration, skull stripping and image normalization...
April 11, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38589058/incidence-risk-factors-and-clinical-implications-of-subarachnoid-hyperdensities-on-flat-panel-detector-computed-tomography-following-mechanical-thrombectomy-in-anterior-circulation-acute-ischemic-stroke-patients
#6
JOURNAL ARTICLE
Bettina L Serrallach, Mattia Branca, Adnan Mujanovic, Anna Boronylo, Julie M Hanke, Arsany Hakim, Sara Pilgram-Pastor, Eike I Piechowiak, Jan Gralla, Thomas Meine, Johannes Kaesmacher, Tomas Dobrocky
BACKGROUND AND PURPOSE: Flat-panel detector computed tomography (FDCT) immediately after mechanical thrombectomy (MT) can detect complications including early hemorrhagic transformation and subarachnoid hyperdensities (SH). The clinical significance of SH in patients undergoing MT remains unclear. MATERIALS AND METHODS: We studied 223 patients who underwent MT for anterior circulation stroke, had FDCT performed immediately after the procedure, and had follow-up imaging within 24 hours...
April 8, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38589057/comparison-of-image-quality-and-radiation-dose-in-pediatric-temporal-bone-ct-using-photon-counting-detectors-ct-and-energy-integrating-detectors-ct
#7
JOURNAL ARTICLE
Jeong Sub Lee, John Kim, Jayapalli R Bapuraj, Ashok Srinivasan
BACKGROUND AND PURPOSE: To compare the image quality and radiation dose of temporal bone CT scans in pediatric patients acquired with photon counting detectors (PCD) CT and energy integrating detectors (EID) CT. MATERIALS AND METHODS: The retrospective study included a total of 110 pediatric temporal bone CT scans (PCD-CT, n=52; EIDCT, n=58). Two independent readers evaluated the spatial resolution of 4 anatomical structures (tympanic membrane, incudostapedial joint, stapedial crura, and cochlear modiolus) and overall image quality using a 4-point scale...
April 8, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38575322/association-of-carotid-artery-disease-with-collateralization-and-infarct-growth-in-patients-with-acute-middle-cerebral-artery-occlusion
#8
JOURNAL ARTICLE
Resul Güney, Arne Potreck, Ulf Neuberger, Niclas Schmitt, Jan Purrucker, Markus A Möhlenbruch, Martin Bendszus, Fatih Seker
BACKGROUND AND PURPOSE: Collaterals are important in large vessel occlusions (LVO), but the role of carotid artery disease (CAD) in this context remains unclear. This study aimed to investigate the impact of CAD on intracranial collateralization and infarct growth after thrombectomy in LVO. MATERIALS AND METHODS: All patients who underwent thrombectomy due to M1 segment occlusion from 01/2015 to 12/2021 were retrospectively included. Internal carotid artery stenosis according to NASCET was assessed on the affected and nonaffected sides...
April 4, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38575321/impact-of-target-artery-size-on-the-performance-of-aspiration-thrombectomy-insights-from-a-swine-model-with-real-time-visualization
#9
JOURNAL ARTICLE
Ichiro Yuki, Timothy Shimizu, Hemdeep Kaur, Zachary W Hsu, Earl Steward, Shuichi Suzuki
A novel swine model was developed to investigate the underlying reasons for the failure of aspiration thrombectomy. The model allows direct visualization of the target artery during thrombectomy in vessels of different sizes. The behavior of the target artery undergoing aspiration thrombectomy was recorded with high-resolution digital microscopy and fluoroscopic visualization, providing valuable insight into how the different sizes of treated arteries affect the effectiveness of mechanical thrombectomy.
April 4, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38575320/endovascular-thrombectomy-for-carotid-pseudo-occlusion-in-the-setting-of-acute-ischemic-stroke-a-comparative-systematic-review-and-meta-analysis
#10
REVIEW
Michelle A Toruno, Tristan Meier, Mohamed Elfil, Karthi Varshika, Jonathan Cortese, Sherief Ghozy, Ramanathan Kadirvel, David F Kallmes
BACKGROUND: The effective treatment for acute ischemic stroke (AIS) patients with cervical internal carotid pseudo-occlusion (cICA-PO) requires comprehensive research on the safety and outcomes of endovascular thrombectomy (EVT). However, there is limited data available, highlighting the need for further research to ensure better treatment strategies and improve the quality of care for these patients. PURPOSE: This study aims to assess the management and outcomes in this population group compared to patients with true carotid occlusion...
April 4, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38575319/reduced-cortical-thickness-correlates-of-cognitive-dysfunction-in-post-covid-19-condition-insights-from-a-long-term-follow-up
#11
JOURNAL ARTICLE
Rosalia Dacosta-Aguayo, Josep Puig, Noemi Lamonja-Vicente, Meritxell Carmona-Cervelló, Brenda Biaani León-Gómez, Gemma Monté-Rubio, Victor M López-Linfante, Valeria Zamora-Putin, Pilar Montero-Alia, Carla Chacon, Jofre Bielsa, Eduard Moreno-Gabriel, Rosa Garcia-Sierra, Alba Pachón, Anna Costa, Maria Mataró, Julia G Prado, Eva Martinez-Cáceres, Lourdes Mateu, Marta Massanella, Concepción Violán, Pere Torán-Monserrat
BACKGROUND AND PURPOSE: There is a paucity of data on long-term neuroimaging findings from individuals who have developed the post-coronavirus 2019 (COVID-19) condition. Only 2 studies have investigated the correlations between cognitive assessment results and structural MR imaging in this population. This study aimed to elucidate the long-term cognitive outcomes of participants with the post-COVID-19 condition and to correlate these cognitive findings with structural MR imaging data in the post-COVID-19 condition...
April 4, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38553015/imaging-findings-post-stereotactic-radiosurgery-for-vestibular-schwannoma-a-primer-for-the-radiologist
#12
REVIEW
Girish Bathla, Parv M Mehta, John C Benson, Amit K Agrwal, Neetu Soni, Michael J Link, Matthew L Carlson, John I Lane
Non-invasive tumor control of vestibular schwannomas through stereotactic radiosurgery allows for high rates of long-term tumor control and has been used primarily for small and medium-sized vestibular schwannomas. The post-treatment imaging appearance of the tumor, temporal patterns of growth and treatment response, as well as extra-tumoral complications can often be both subtle or confusing and should be appropriately recognized. Herein, the authors present an imaging-based review of expected changes, as well as associated complications related to radiosurgery for vestibular schwannomas...
March 29, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548308/time-saving-3d-mr-imaging-protocols-with-millimeter-and-submillimeter-isotropic-spatial-resolution-for-face-and-neck-imaging-as-implemented-at-a-single-site-major-referral-center
#13
JOURNAL ARTICLE
Jeffrey P Guenette, Lei Qin
MR imaging has become the routine technique for staging nasopharyngeal carcinoma, evaluating perineural tumor spread, and detecting cartilage invasion in laryngeal carcinoma. However, these protocols traditionally require in the range of 25 to 35 minutes of acquisition time. 3D sequences offer the potential advantage of time savings through the acquisition of 1-mm or submillimeter resolution isotropic data followed by multiplanar reformats that require no further imaging time. We have iteratively optimized vendor product 3D T1-weighted MR imaging sequences for morphologic face and neck imaging, reducing the average acquisition time of our 3T protocols by 9 minutes 57 seconds (40...
March 29, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548309/mechanical-thrombectomy-for-pediatric-arterial-ischemic-stroke-from-acute-m2-occlusion
#14
JOURNAL ARTICLE
Kartik D Bhatia, Elizabeth Pulcine, Ian Andrews, Sachin Gupta, Richard Webster, Christopher Troedson, Russell C Dale, Michelle Lorentzos, Carmen Parra-Farinas, John Worthington, Kylie Tastula, Timothy Ang, Andrew Cheung, Nathan Manning, Prakash Muthusami
Pediatric large-vessel occlusion has a poor natural history. Recent retrospective studies have demonstrated the potential benefits, feasibility, and safety profile of mechanical thrombectomy in children. However, the role of thrombectomy in pediatric M2 occlusions remains uncertain. In this clinical report, we present a multicenter series of 6 pediatric patients with acute M2 occlusion (female = 1, male = 5; age range, 0.9-16.0 years, mean = 9.2). All 6 patients having undergone thrombectomy had excellent clinical outcomes (pediatric mRS = 0-1) at 3 months and final available follow-up (median, 12 months; range, 3-72 months)...
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548307/iv-flat-detector-ct-angiography-in-flat-detector-ct-image-guided-minimally-invasive-surgery-for-the-treatment-of-intracerebral-hypertensive-hemorrhage
#15
JOURNAL ARTICLE
Zhang Shu, Wei Wang, Yufa Qiu, Lihong Zhang, Yu Zheng, Jian Wang, Wenyi Li, Jiajia Ge, Ying Yu, Nan Lv, Chi Wang
BACKGROUND AND PURPOSE: Spontaneous intracerebral hemorrhage is a serious stroke subtype with high mortality and morbidity. Minimally invasive surgery plus thrombolysis is a promising treatment option, but it requires accurate catheter placement and real-time monitoring. The authors introduced IV flat detector CT angiography (ivFDCTA) into the minimally invasive surgery procedure for the first time, to provide vascular information and guidance for hematoma evacuation. MATERIALS AND METHODS: Thirty-six patients with hypertensive intracerebral hemorrhage were treated with minimally invasive surgery under the guidance of ivFDCTA and flat detector CT (FDCT) in the angiography suite...
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548306/introducing-the-american-society-of-neuroradiology-pet-guided-diagnosis-and-management-in-neuro-oncology-study-group
#16
EDITORIAL
A Nabavizadeh, N Galldiks, M Veronesi, P Lohmann, J E McConathy, D R Johnson, M S Aboian, R F Barajas, J Ivanidze
No abstract text is available yet for this article.
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548305/neurofilament-light-chain-levels-interact-with-neurodegenerative-patterns-and-motor-neuron-dysfunction-in-amyotrophic-lateral-sclerosis
#17
JOURNAL ARTICLE
Penelope Tilsley, Antoine Moutiez, Alexandre Brodovitch, Mohamed Mounir El Mendili, Benoit Testud, Wafaa Zaaraoui, Annie Verschueren, Shahram Attarian, Maxime Guye, José Boucraut, Aude-Marie Grapperon, Jan-Patrick Stellmann
BACKGROUND AND PURPOSE: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease involving rapid motor neuron degeneration leading to brain, primarily precentral, atrophy. Neurofilament light chains are a robust prognostic biomarker highly specific to ALS, yet associations between neurofilament light chains and MR imaging outcomes are not well-understood. We investigated the role of neurofilament light chains as mediators among neuroradiologic assessments, precentral neurodegeneration, and disability in ALS...
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548304/increased-intracranial-arterial-pulsatility-and-microvascular-brain-damage-in-pseudoxanthoma-elasticum
#18
JOURNAL ARTICLE
J W Bartstra, T van den Beukel, G Kranenburg, L J Geurts, A M den Harder, T Witkamp, J M Wolterink, J J M Zwanenburg, E van Valen, H L Koek, W P T M Mali, P A de Jong, J Hendrikse, W Spiering
BACKGROUND AND PURPOSE: Carotid siphon calcification might contribute to the high prevalence of cerebrovascular disease in pseudoxanthoma elasticum through increased arterial flow pulsatility. This study aimed to compare intracranial artery flow pulsatility, brain volumes, and small-vessel disease markers between patients with pseudoxanthoma elasticum and controls and the association between arterial calcification and pulsatility in pseudoxanthoma elasticum. MATERIALS AND METHODS: Fifty patients with pseudoxanthoma elasticum and 40 age- and sex-matched controls underwent 3T MR imaging, including 2D phase-contrast acquisitions for flow pulsatility in the assessment of ICA and MCA and FLAIR acquisitions for brain volumes, white matter lesions, and infarctions...
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548303/imaging-genomics-of-glioma-revisited-analytic-methods-to-understand-spatial-and-temporal-heterogeneity
#19
REVIEW
Cymon N Kersch, Minjae Kim, Jared Stoller, Ramon F Barajas, Ji Eun Park
An improved understanding of the cellular and molecular biologic processes responsible for brain tumor development, growth, and resistance to therapy is fundamental to improving clinical outcomes. Imaging genomics is the study of the relationships between microscopic, genetic, and molecular biologic features and macroscopic imaging features. Imaging genomics is beginning to shift clinical paradigms for diagnosing and treating brain tumors. This article provides an overview of imaging genomics in gliomas, in which imaging data including hallmarks such as IDH -mutation, MGMT methylation, and EGFR -mutation status can provide critical insights into the pretreatment and posttreatment stages...
March 28, 2024: AJNR. American Journal of Neuroradiology
https://read.qxmd.com/read/38548302/from-pajnr-to-eajnr
#20
EDITORIAL
Mauricio Castillo
No abstract text is available yet for this article.
March 28, 2024: AJNR. American Journal of Neuroradiology
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