keyword
MENU ▼
Read by QxMD icon Read
search

T2 FLAIR

keyword
https://www.readbyqxmd.com/read/28918752/correlation-of-csf-flow-using-phase-contrast-mri-with-ventriculomegaly-and-csf-opening-pressure-in-mucopolysaccharidoses
#1
Amauri Dalla Corte, Carolina F M de Souza, Maurício Anés, Fabio K Maeda, Armelle Lokossou, Leonardo M Vedolin, Maria Gabriela Longo, Monica M Ferreira, Solanger G P Perrone, Olivier Balédent, Roberto Giugliani
BACKGROUND: Very little is known about the incidence and prevalence of hydrocephalus in patients with mucopolysaccharidoses (MPS). The biggest challenge is to distinguish communicating hydrocephalus from ventricular dilatation secondary to brain atrophy, because both conditions share common clinical and neuroradiological features. The main purpose of this study is to assess the relationship between ventriculomegaly, brain and cerebrospinal fluid (CSF) volumes, aqueductal and cervical CSF flows, and CSF opening pressure in MPS patients, and to provide potential biomarkers for abnormal CSF circulation...
September 18, 2017: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/28903444/early-tumour-shrinkage-as-a-survival-predictor-in-patients-with-recurrent-glioblastoma-treated-with-bevacizumab-in-the-avareg-randomized-phase-ii-study
#2
Alba A Brandes, Gaetano Finocchiaro, Vittorina Zagonel, Michele Reni, Alessandra Fabi, Claudia Caserta, Alicia Tosoni, Marica Eoli, Giuseppe Lombardi, Matteo Clavarezza, Alexandro Paccapelo, Stefania Bartolini, Luigi Cirillo, Raffaele Agati, Enrico Franceschi
BACKGROUND: Disease assessment for recurrent glioblastoma (GBM) represents a challenge, especially with the use of antiangiogenic agents. Moreover, validated neuroradiological predictors of outcome are lacking. Recently, the concept of early tumor shrinkage (ETS) has been developed to better assess the ability of treatments in determining a rapid and remarkable tumor response. The aim of the study was to evaluate the role of ETS in predicting survival of GBM patients treated with BEV...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28893696/medullary-decompression-by-sling-repositioning-of-the-vertebral-artery-with-operative-video-technical-case-report
#3
Luis C Ascanio, Abdulrahman Y Alturki, Christoph J Griessenauer, Rouzbeh Motiei-Langroudi, Sandeep Kumar, Christopher S Ogilvy
BACKGROUND: Vascular compression of the medullary pyramid resulting in neurological compromise is rare, therefore, diagnosis is difficult and ultimately delayed. Most patients present with a combination of cranial nerve, autonomic, and/or motor and sensory dysfunction. Presentation with a single sign such as hemiparesis is rare. The low number of cases reported has made it impossible to define a standard treatment for this unusual disorder. CASE DESCRIPTION: Here, we present a patient with a progressive left hemiparesis due to compression of the upper medulla by the vertebral artery, which was treated with repositioning of the artery using a sling...
September 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28893125/diffusion-tensor-magnetic-resonance-imaging-driven-growth-modeling-for-radiotherapy-target-definition-in-glioblastoma
#4
Morten B Jensen, Trine L Guldberg, Anja Harbøll, Slávka Lukacova, Jesper F Kallehauge
BACKGROUND: The clinical target volume (CTV) in radiotherapy is routinely based on gadolinium contrast enhanced T1 weighted (T1w + Gd) and T2 weighted fluid attenuated inversion recovery (T2w FLAIR) magnetic resonance imaging (MRI) sequences which have been shown to over- or underestimate the microscopic tumor cell spread. Gliomas favor spread along the white matter fiber tracts. Tumor growth models incorporating the MRI diffusion tensors (DTI) allow to account more consistently for the glioma growth...
September 12, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28870515/mri-characteristics-of-the-glia-limitans-externa-a-7t-study
#5
Kiyotaka Suzuki, Kenichi Yamada, Kazunori Nakada, Yuji Suzuki, Masaki Watanabe, Ingrid L Kwee, Tsutomu Nakada
PURPOSE: To perform a systematic analysis of the intrinsic contrast parameters of the FLAIR hyperintense rim (FHR), a thin layer of high intensity covering the entire surface of the cerebral cortex detected on fluid-attenuated inversion recovery (FLAIR) sequence T2 weighted imaging performed on a 7T system, in an attempt to identify its anatomical correlate. METHODS: Fast spin echo inversion recovery (FSE-IR) and cardiac-gated fast spin echo (FSE) images were obtained with defined parameters in eight normal volunteers on a 7 T MRI system to determine T2 and proton density, T1 characteristics...
September 9, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28865922/prediction-of-hemorrhagic-transformation-after-acute-thrombolysis-following-major-artery-occlusion-using-relative-adc-ratio-a-retrospective-study
#6
N Shinoda, S Hori, K Mikami, T Bando, D Shimo, T Kuroyama, Y Kuramoto, M Matsumoto, O Hirai, Y Ueno
BACKGROUND: The relative apparent diffusion coefficient (ADC) ratio can be used to evaluate the extent of ischemia. We investigated the risk factors for, and correlation between, relative ADC ratio and hemorrhagic transformation (HT) after thrombolysis. METHODS: This single-center, retrospective study involved 105 patients with acute occlusion of the anterior circulation. Relative ADC ratio was calculated as the ratio of ADC pixel values, within the affected territory to ADC pixel values in the contralateral normal region...
September 1, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28865050/histogram-analysis-of-t1-weighted-t2-weighted-and-postcontrast-t1-weighted-images-in-primary-cns-lymphoma-correlations-with-histopathological-findings-a-preliminary-study
#7
Hans-Jonas Meyer, Stefan Schob, Benno Münch, Clara Frydrychowicz, Nikita Garnov, Ulf Quäschling, Karl-Titus Hoffmann, Alexey Surov
PURPOSE: Previously, some reports mentioned that magnetic resonance imaging (MRI) can predict histopathological features in primary CNS lymphoma (PCNSL). The reported data analyzed diffusion-weighted imaging findings. The aim of this study was to investigate possible associations between histopathological findings, such as tumor cellularity, nucleic areas and proliferation index Ki-67, and signal intensity on T1-weighted and T2-weighted images in PCNSL. PROCEDURES: For this study, 18 patients with PCNSL were retrospectively investigated by histogram analysis on precontrast and postcontrast T1-weighted and fluid-attenuated inversion recovery (FLAIR) images...
September 1, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28861704/multimodal-image-registration-based-on-binary-gradient-angle-descriptor
#8
Dongsheng Jiang, Yonghong Shi, Demin Yao, Yifeng Fan, Manning Wang, Zhijian Song
PURPOSE: Multimodal image registration plays an important role in image-guided interventions/therapy and atlas building, and it is still a challenging task due to the complex intensity variations in different modalities. METHODS: The paper addresses the problem and proposes a simple, compact, fast and generally applicable modality-independent binary gradient angle descriptor (BGA) based on the rationale of gradient orientation alignment. The BGA can be easily calculated at each voxel by coding the quadrant in which a local gradient vector falls, and it has an extremely low computational complexity, requiring only three convolutions, two multiplication operations and two comparison operations...
August 31, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28860940/limbic-encephalitis-a%C3%A2-report-of-four-cases
#9
Żanna Pastuszak, Adam Stępień, Kazimierz Tomczykiewicz, Renata Piusińska-Macoch, Joanna Kordowska, Dariusz Galbarczyk, Jarosław Świstak
Usually limbic encephalitis (LE) is a paraneoplastic neurologic syndrome. LE symptoms can precede cancer even by a few years. Almost 50% of LE cases are connected with small cell lung carcinoma. Testis and breast cancers, granulomatous disease, thymoma, and teratomas are also often connected with LE. Other cases have infectious and autoimmunological aetiology. In LE limbic system dysfunction is observed, and it is accompanied by cerebellum and brain stem abnormalities as well as polyneuropathy. Paraneoplastic limbic encephalitis is sometimes a part of larger syndrome in which brain stem and spinal cord are involved in an inflammatory process called paraneoplastic encephalomyelitis...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28854990/the-uniform-cortex-sign-a-diagnostic-sign-of-diffuse-cortical-injury-on-mr-imaging-of-the-brain-at-1-5-t
#10
Andrew Leung, Apurva Patel, Basem Bahakeem, David Pelz, Donald Lee, Manas Sharma
BACKGROUND: To introduce the "uniform cortex sign" (UCS) and evaluate its performance as a diagnostic test for the presence of diffuse cortical injury (DCI). METHODS: The study was approved by our institutional review board. Three experienced neuroradiologists were given a tutorial on the UCS. They were subsequently presented with 14 cases (7 control patients and 7 DCI patients with the UCS) in random order and asked to determine whether the UCS was present. Each case consisted of selected DWI, T2-weighted, and FLAIR images from unenhanced 1...
August 31, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28841802/advanced-magnetic-resonance-imaging-in-glioblastoma-a-review
#11
Gaurav Shukla, Gregory S Alexander, Spyridon Bakas, Rahul Nikam, Kiran Talekar, Joshua D Palmer, Wenyin Shi
Glioblastoma, the most common and most rapidly progressing primary malignant tumor of the central nervous system, continues to portend a dismal prognosis, despite improvements in diagnostic and therapeutic strategies over the last 20 years. The standard of care radiographic characterization of glioblastoma is magnetic resonance imaging (MRI), which is a widely utilized examination in the diagnosis and post-treatment management of patients with glioblastoma. Basic MRI modalities available from any clinical scanner, including native T1-weighted (T1w) and contrast-enhanced (T1CE), T2-weighted (T2w), and T2-fluid-attenuated inversion recovery (T2-FLAIR) sequences, provide critical clinical information about various processes in the tumor environment...
August 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28830202/radiological-distribution-of-brain-metastases-and-it-s-implication-for-the-hippocampus-avoidance-in-whole-brain-radiotherapy-approach
#12
Yi-Min Han, Gang Cai, Wei-Min Chai, Cheng Xu, Lu Cao, Dan Ou, Jia-Yi Chen, Youlia M Kirova
PURPOSE: Hippocampus avoidance in whole brain radiotherapy (HA-WBRT) offers the feasibility of less impaired cognitive function than conventional WBRT. The study aims to assess the radiological distribution of BMs with relation to the hippocampus and peri-hippocampus(PH) region as defined by the RTOG 0933 for better understanding of margin definition in HA-WBRT treatment planning. METHODS: Consecutive patients with diagnosis of BM from enhanced MRI between 03/2011 and 07/2016 were analyzed...
August 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28828132/central-nervous-system-fungal-infection-in-a-young-male-with-a-history-of-intravenous-drug-abuse-and-hepatitis-c
#13
Celene Hadley, Atif Wasim Haneef Mohamed, Aparna Singhal
A young male, with a known history of hepatitis C and heroin abuse, was admitted to the emergency department with altered sensorium, left-sided weakness, and no meningeal signs. Initial computed tomography imaging showed hypodensity involving right basal ganglia with mass effect but no hemorrhage. Magnetic resonance imaging revealed multiple nonenhancing small foci of restricted diffusion involving the right basal ganglia, T2 and FLAIR hyperintensity within the right basal ganglia, and internal capsule with mild surrounding edema...
September 2017: Radiology case reports
https://www.readbyqxmd.com/read/28820013/diagnostic-performance-of-central-vein-sign-for-multiple-sclerosis-with-a-simplified-three-lesion-algorithm
#14
Andrew J Solomon, Richard Watts, Daniel Ontaneda, Martina Absinta, Pascal Sati, Daniel S Reich
BACKGROUND: Detection of a "central vein sign" (CVS) on FLAIR* magnetic resonance imaging (MRI) is highly specific and sensitive for multiple sclerosis (MS). We evaluated the specificity and sensitivity of simplified CVS algorithms for MS diagnosis. METHODS: MRIs from 10 participants with MS without additional comorbidities for MRI white matter abnormalities; 10 with MS and additional comorbidities for white matter abnormalities; 10 with migraine, white matter abnormalities, and no additional comorbidities; and 10 who had previously been erroneously diagnosed with MS were evaluated...
August 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28818358/black-toenail-sign-in-melas-syndrome
#15
Matthew T Whitehead, Michael Wien, Bonmyong Lee, Nancy Bass, Andrea Gropman
BACKGROUND: Mitochondrial encephalopathy with lactic acidosis and stroke-like episodes (MELAS) syndrome is a mitochondrial disorder often causing progressive brain injury that is not confined to large arterial territories. Severe insults ultimately lead to gyral necrosis affecting the cortex and juxtacortical white matter; the neuroimaging correlate is partial gyral signal suppression on T2/FLAIR sequences that resemble black toenails. We aimed to characterize the imaging features and the natural history of MELAS-related gyral necrosis...
July 12, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28810566/correlation-analysis-between-the-ldl-c-in-serum-and-the-onset-of-transient-ischemic-attack-caused-by-csvd
#16
Yaqi Chen, Mei Hu, Hongying Gong
The aim of this study was to investigate the correlation between the low-density lipoprotein cholesterol (LDL-C) in serum and the onset of transient ischemic attack caused by cerebral small vascular disease (CSVD). Between September 2012 and September 2015, 249 patients who were diagnosed as CSVD were randomly enrolled in this study. According to MRI results, patients were divided into the patient and control groups. In the patient group, the patients were further subdivided into the white matter lesion (WML) group (n=86) and lacunar infarction (LI) group (n=53)...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28804045/unusual-magnetic-resonance-imaging-findings-of-a-glioblastoma-arising-during-treatment-with-lenvatinib-for-thyroid-cancer
#17
Nobuhiko Arai, Hikaru Sasaki, Ryota Tamura, Kentarou Obara, Kazunari Yoshida
BACKGROUND: Glioblastoma (GBM) is radiologically characterized by magnetic resonance imaging (MRI) findings, such as ring enhancement with extensive perifocal edema and a butterfly appearance extending into the bilateral lobes. However, these characteristic findings could be changed by anti-angiogenic therapy, with decreased contrast enhancement and improved perifocal edema. Herein, we report a case of glioblastoma that arose during treatment with a tyrosine kinase inhibitor for another cancer...
August 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28789642/uremic-encephalopathy-with-isolated-brainstem-involvement-revealed-by-magnetic-resonance-image-a-case-report
#18
Li-Jing Jia, Zhen-Zhen Qu, Xue-Qian Zhang, Yu-Juan Tian, Ying Wang
BACKGROUND: Uremic Encephalopathy (UE) is a neurological complication associated with acute or chronic renal failure. Imaging findings of UE may present involvement of the basal ganglia, cortical or subcortical regions, and white matter. We report a rare case of UE caused by neurogenic bladder with isolated brainstem involvement revealed by magnetic resonance imaging (MRI). Immediate therapy resulted in full recovery of neurological signs and changes on MRI. CASE PRESENTATION: A 14-year-old Han Chinese woman with a history of chronic renal failure caused by neurogenic bladder...
August 8, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28751449/t2-flair-mismatch-an-imaging-biomarker-for-idh-and-1p-19q-status-in-lower-grade-gliomas-a-tcga-tcia-project
#19
Sohil H Patel, Laila M Poisson, Daniel J Brat, Yueren Zhou, Lee Cooper, Matija Snuderl, Cheddhi Thomas, Ana M Franceschi, Brent Griffith, Adam Flanders, John G Golfinos, Andrew S Chi, Rajan Jain
Lower grade gliomas (WHO grade II/III) have been classified into clinically-relevant molecular subtypes based on IDH and 1p/19q mutation status. The purpose was to investigate whether T2/FLAIR MRI features could distinguish between lower grade glioma molecular subtypes.<br /><br />Experimental Design: MRI scans from the TCGA/TCIA lower grade glioma database (n=125) were evaluated by 2 independent neuroradiologists to assess: 1) presence/absence of homogenous signal on T2WI; 2) presence/absence of "T2-FLAIR mismatch" sign; 3) sharp or indistinct lesion margins; 4) presence/absence of peritumoral edema...
July 27, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28740448/evaluation-of-brain-edema-formation-defined-by-mri-after-linac-based-stereotactic-radiosurgery
#20
Maciej Harat, Andrzej Lebioda, Judyta Lasota, Roman Makarewicz
BACKGROUND: Peri-lesional edema is a serious and well-known complication of stereotactic radiosurgery (SRS). Here we evaluated edema risk after SRS and assessed its formation and resolution dynamics. PATIENTS AND METHODS: 107 patients underwent SRS for heterogeneous diagnoses: 34 (29%) with arteriovenous malformations, 38 (35%) with meningiomas, 16 (15%) with metastatic tumors, 16 (15%) with acoustic neuromas, 3 with (3%) cavernomas, and 2 (2%) each with anaplastic astrocytomas and anaplastic oligoastrocytomas...
June 2017: Radiology and Oncology
keyword
keyword
37059
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"