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Dti Hypothermia

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https://www.readbyqxmd.com/read/29622488/cerebral-autoregulation-and-conventional-and-diffusion-tensor-imaging-magnetic-resonance-imaging-in-neonatal-hypoxic-ischemic-encephalopathy
#1
Melisa Carrasco, Jamie Perin, Jacky M Jennings, Charlamaine Parkinson, Maureen M Gilmore, Raul Chavez-Valdez, An N Massaro, Raymond C Koehler, Frances J Northington, Aylin Tekes, Jennifer K Lee
BACKGROUND: Deviation of mean arterial blood pressure (MAP) from the range that optimizes cerebral autoregulatory vasoreactivity (optimal MAP) could increase neurological injury from hypoxic-ischemic encephalopathy (HIE). We tested whether a global magnetic resonance imaging (MRI) brain injury score and regional diffusion tensor imaging (DTI) are associated with optimal MAP in neonates with HIE. METHODS: Twenty-five neonates cooled for HIE were monitored with the hemoglobin volume index...
May 2018: Pediatric Neurology
https://www.readbyqxmd.com/read/29247238/trpv1-mediated-pharmacological-hypothermia-promotes-improved-functional-recovery-following-ischemic-stroke
#2
Zhijuan Cao, Adithya Balasubramanian, Steen E Pedersen, Jonathan Romero, Robia G Pautler, Sean P Marrelli
Hypothermia shows promise for stroke neuroprotection, but current cooling strategies cause undesirable side effects that limit their clinical applications. Increasing efforts have focused on pharmacological hypothermia as a treatment option for stroke. Previously, we showed that activation of a thermoregulatory ion channel, transient receptor potential vanilloid 1 (TRPV1), by dihydrocapsaicin (DHC) produces reliable hypothermia. In this study, we investigate the effects of TRPV1-mediated hypothermia by DHC on long-term ischemic stroke injury and functional outcome...
December 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28095379/diffusion-tensor-imaging-detects-occult-cerebellar-injury-in-severe-neonatal-hypoxic-ischemic-encephalopathy
#3
Monica E Lemmon, Matthias W Wagner, Thangamadhan Bosemani, Kathryn A Carson, Frances J Northington, Thierry A G M Huisman, Andrea Poretti
BACKGROUND: Despite the benefits of whole-body hypothermia therapy, many infants with hypoxic-ischemic encephalopathy (HIE) die or have significant long-term neurodevelopmental impairment. Prospectively identifying neonates at risk of poor outcome is essential but not straightforward. The cerebellum is not classically considered to be a brain region vulnerable to hypoxic-ischemic insults; recent literature suggests, however, that the cerebellum may be involved in neonatal HIE. In this study, we aimed to assess the microstructural integrity of cerebellar and linked supratentorial structures in neonates with HIE compared to neurologically healthy neonatal controls...
2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/26246138/neonatal-neurobehavior-after-therapeutic-hypothermia-for-hypoxic-ischemic-encephalopathy
#4
An N Massaro, Iordanis Evangelou, Judy Brown, Ali Fatemi, Gilbert Vezina, Robert McCarter, Penny Glass, Catherine Limperopoulos
BACKGROUND: Perinatal hypoxic ischemic encephalopathy (HIE) is a major cause of neurodevelopmental impairment including cerebral palsy and intellectual disability. Brain magnetic resonance imaging is the gold standard for acute assessment of cerebral injury in HIE. Limited data are available regarding the significance of clinically manifested neurobehavioral impairments in the neonatal period. AIM: To evaluate brain structure-function relationships in newborns with HIE using diffusion tensor imaging (DTI) and the NICU Network Neurobehavioral Scale (NNNS)...
October 2015: Early Human Development
https://www.readbyqxmd.com/read/26229690/evolution-of-apparent-diffusion-coefficient-and-fractional-anisotropy-in-the-cerebrum-of-asphyxiated-newborns-treated-with-hypothermia-over-the-first-month-of-life
#5
Saskia Kwan, Elodie Boudes, Anouk Benseler, Guillaume Gilbert, Christine Saint-Martin, Michael Shevell, Pia Wintermark
The objective of this study was to assess the evolution of diffusion-weighted imaging (DWI) and diffusion-tensor imaging (DTI) over the first month of life in asphyxiated newborns treated with hypothermia and to compare it with that of healthy newborns. Asphyxiated newborns treated with hypothermia were enrolled prospectively; and the presence and extent of brain injury were scored on each MRI. Apparent diffusion coefficient (ADC) and fractional anisotropy (FA) values were measured in the basal ganglia, in the white matter and in the cortical grey matter...
2015: Neural Plasticity
https://www.readbyqxmd.com/read/25492527/white-matter-tract-integrity-and-developmental-outcome-in-newborn-infants-with-hypoxic-ischemic-encephalopathy-treated-with-hypothermia
#6
An N Massaro, Iordanis Evangelou, Ali Fatemi, Gilbert Vezina, Robert Mccarter, Penny Glass, Catherine Limperopoulos
AIM: To determine whether corpus callosum (CC) and corticospinal tract (CST) diffusion tensor imaging (DTI) measures relate to developmental outcome in encephalopathic newborn infants after therapeutic hypothermia. METHOD: Encephalopathic newborn infants enrolled in a longitudinal study underwent DTI after hypothermia. Parametric maps were generated for fractional anisotropy, mean, radial, and axial diffusivity. CC and CST were segmented by DTI-based tractography...
May 2015: Developmental Medicine and Child Neurology
https://www.readbyqxmd.com/read/25169927/apparent-diffusion-coefficient-scalars-correlate-with-near-infrared-spectroscopy-markers-of-cerebrovascular-autoregulation-in-neonates-cooled-for-perinatal-hypoxic-ischemic-injury
#7
A Tekes, A Poretti, M M Scheurkogel, T A G M Huisman, J A Howlett, E Alqahtani, J-H Lee, C Parkinson, K Shapiro, S-E Chung, J M Jennings, M M Gilmore, C W Hogue, L J Martin, R C Koehler, F J Northington, J K Lee
BACKGROUND AND PURPOSE: Neurologic morbidity remains high in neonates with perinatal hypoxic-ischemic injury despite therapeutic hypothermia. DTI provides qualitative and quantitative information about the microstructure of the brain, and a near-infrared spectroscopy index can assess cerebrovascular autoregulation. We hypothesized that lower ADC values would correlate with worse autoregulatory function. MATERIALS AND METHODS: Thirty-one neonates with hypoxic-ischemic injury were enrolled...
January 2015: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/24192275/concurrent-erythropoietin-and-hypothermia-treatment-improve-outcomes-in-a-term-nonhuman-primate-model-of-perinatal-asphyxia
#8
Christopher M Traudt, Ronald J McPherson, Larry A Bauer, Todd L Richards, Thomas M Burbacher, Ryan M McAdams, Sandra E Juul
BACKGROUND: Up to 65% of untreated infants suffering from moderate to severe hypoxic-ischemic encephalopathy (HIE) are at risk of death or major disability. Therapeutic hypothermia (HT) reduces this risk to approximately 50% (number needed to treat: 7-9). Erythropoietin (Epo) is a neuroprotective treatment that is promising as an adjunctive therapy to decrease HIE-induced injury because Epo decreases apoptosis, inflammation, and oxidative injury and promotes glial cell survival and angiogenesis...
2013: Developmental Neuroscience
https://www.readbyqxmd.com/read/23618911/evolution-of-pattern-of-injury-and-quantitative-mri-on-days-1-and-3-in-term-newborns-with-hypoxic-ischemic-encephalopathy
#9
Dawn Gano, Vann Chau, Kenneth J Poskitt, Alan Hill, Elke Roland, Rollin Brant, Mark Chalmers, Steven P Miller
BACKGROUND: Brain injury in term neonatal hypoxic-ischemic encephalopathy (HIE) emerges on magnetic resonance imaging (MRI) by day 3. This study aimed to address the relationship of MRI, diffusion tensor imaging (DTI), and MR spectroscopic imaging (MRSI) findings on days 1 and 3 in a prospective cohort of term newborns with HIE. METHODS: A total of 24 term newborns with HIE were prospectively studied with MRI on days 1 and 3; 19 were imaged with DTI and MRSI on days 1 and 3...
July 2013: Pediatric Research
https://www.readbyqxmd.com/read/23269413/white-matter-integrity-on-fractional-anisotropy-maps-in-encephalopathic-neonates-post-hypothermia-therapy-with-normal-appearing-mr-imaging
#10
Earn Chun Christabel Lee, Neha S Kwatra, Gilbert Vezina, Zarir P Khademian
BACKGROUND: Neonatal encephalopathy (NE) is a clinically defined neurological syndrome commonly caused by ischemia. OBJECTIVE: We investigated white matter integrity in children with NE using diffusion tensor imaging (DTI) and examined the hypothesis that white matter insults not visible on conventional MRI may have abnormal fractional anisotropy (FA) on DTI. MATERIALS AND METHODS: DTI was performed on 36 term encephalopathic neonates who had hypothermia therapy...
June 2013: Pediatric Radiology
https://www.readbyqxmd.com/read/22595900/therapeutic-hypothermia-for-neonatal-encephalopathy-results-in-improved-microstructure-and-metabolism-in-the-deep-gray-nuclei
#11
RANDOMIZED CONTROLLED TRIAL
S L Bonifacio, A Saporta, H C Glass, P Lee, D V Glidden, D M Ferriero, A J Barkovich, D Xu
BACKGROUND AND PURPOSE: Therapeutic hypothermia has reduced morbidity and mortality and is associated with a lower burden of lesions on conventional imaging in NE. However, its effects on brain microstructure and metabolism have not been fully characterized. We hypothesized that therapeutic hypothermia improves measures of brain microstructure and metabolism. MATERIALS AND METHODS: Forty-one neonates with moderate/severe NE (29 treated with hypothermia, 12 nontreated) and 12 healthy neonates underwent MR imaging, DTI, and (1)H-MR spectroscopy...
December 2012: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/22447318/prediction-of-neurodevelopmental-outcome-after-hypoxic-ischemic-encephalopathy-treated-with-hypothermia-by-diffusion-tensor-imaging-analyzed-using-tract-based-spatial-statistics
#12
Nora Tusor, Courtney Wusthoff, Natalie Smee, Nazakat Merchant, Tomoki Arichi, Joanna M Allsop, Frances M Cowan, Denis Azzopardi, A David Edwards, Serena J Counsell
INTRODUCTION: Objective biomarkers are needed to assess neuroprotective therapies after perinatal hypoxic-ischemic encephalopathy (HIE). We tested the hypothesis that, in infants who underwent therapeutic hypothermia after perinatal HIE, neurodevelopmental performance was predicted by fractional anisotropy (FA) values in the white matter (WM) on early diffusion tensor imaging (DTI) as assessed by means of tract-based spatial statistics (TBSS). METHODS: We studied 43 term infants with HIE...
July 2012: Pediatric Research
https://www.readbyqxmd.com/read/22013426/use-of-high-resolution-3d-diffusion-tensor-imaging-to-study-brain-white-matter-development-in-live-neonatal-rats
#13
Yu Cai, Matthew S McMurray, Ipek Oguz, Hong Yuan, Martin A Styner, Weili Lin, Josephine M Johns, Hongyu An
High resolution diffusion tensor imaging (DTI) can provide important information on brain development, yet it is challenging in live neonatal rats due to the small size of neonatal brain and motion-sensitive nature of DTI. Imaging in live neonatal rats has clear advantages over fixed brain scans, as longitudinal and functional studies would be feasible to understand neuro-developmental abnormalities. In this study, we developed imaging strategies that can be used to obtain high resolution 3D DTI images in live neonatal rats at postnatal day 5 (PND5) and PND14, using only 3 h of imaging acquisition time...
2011: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/20520585/tract-based-spatial-statistics-of-magnetic-resonance-images-to-assess-disease-and-treatment-effects-in-perinatal-asphyxial-encephalopathy
#14
Emma J Porter, Serena J Counsell, A David Edwards, Joanna Allsop, Denis Azzopardi
Biomarkers are required for efficient trials of neuroprotective interventions after perinatal asphyxia. This study aimed to determine whether diffusion tensor imaging (DTI) analyzed by tract-based spatial statistics (TBSS) may be a suitable biomarker of disease and treatment effects after perinatal asphyxia in small groups of patients. We performed TBSS from DTI obtained at 3 T from eight healthy control infants, 10 untreated and 10 hypothermia-treated infants with neonatal encephalopathy. Median (range) postnatal age at scan was 1 d (1-21) in the healthy infants, 6 d (4-20) in the cooled, and 7 d (4-18) in noncooled infants...
September 2010: Pediatric Research
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