https://ogma.newcastle.edu.au/vital/access/ /manager/Index ${session.getAttribute("locale")} 5 Stroke and cerebral ischemia https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18338 Wed 24 Jun 2015 11:36:33 AEST ]]> Behavioral, blood, and magnetic resonance imaging biomarkers of experimental mild traumatic brain injury https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30321 Wed 16 May 2018 13:39:09 AEST ]]> Baseline collateral status and infarct topography in post-ischaemic perilesional hyperperfusion: an arterial spin labelling study https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32689 Wed 11 Jul 2018 14:51:29 AEST ]]> Foods and dietary profiles associated with 'food addiction' in young adults https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28370 Wed 11 Apr 2018 18:17:02 AEST ]]> How accurate is web-based self-reported height, weight, and body mass index in young adults? https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13783 Wed 11 Apr 2018 16:00:09 AEST ]]> Association of cortical vein filling with clot location and clinical outcomes in acute ischaemic stroke patients https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29940 Wed 11 Apr 2018 14:01:08 AEST ]]> MRI in general practice https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:16960 Wed 11 Apr 2018 12:30:27 AEST ]]> In Vivo brain magnetic resonance spectroscopy: a measurement of biomarker sensitivity to post-processing algorithms https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21275 in vivo brain magnetic resonance spectroscopy biomarkers is investigated with respect to parameter values for two key stages of post-acquisitional processing. Our effort is specifically motivated by the lack of consensus on approaches and parameter values for the two critical operations, water resonance removal, and baseline correction. The different stages of data processing also introduce varying levels of uncertainty and arbitrary selection of parameter values can significantly underutilize the intrinsic differences between two classes of signals. The sensitivity of biomarkers points to the need for a better understanding of how all stages of post-acquisitional processing affect biomarker discovery and ultimately, clinical translation. Our results also highlight the possibility of optimizing biomarker discovery by the careful selection of parameters that best reveal class differences. Using previously reported data and biomarkers, our results demonstrate that small changes in parameter values affect the statistical significance and corresponding effect size of biomarkers. Consequently, it is possible to increase the strength of biomarkers by selecting optimal parameter values in different spectral intervals. Our analyses with a previously reported data set demonstrate an increase in effect sizes for wavelet-based biomarkers of up to 36%, with increases in classification performance of up to 12%.]]> Wed 11 Apr 2018 12:19:42 AEST ]]> The application of magnetic resonance spectroscopy to investigate the effect of a commercial energy drink https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27129 in-vivo measurement of brain biochemistry. The objective of this study was to explore the effects of a commercial energy drink (ED) on brain metabolites in adult males using MRS. Methods: Ten males (18 to 30 years), of mean body mass index 23.8±2.2 kg/m² [range 21.4-27.8 kg/m²] were recruited and randomized to either the intervention group (n=5) or control group (n=5). The intervention group were asked to consume two 250ml cans of Red Bull and the control group consumed no drink. One dimensional MRS on a 1.5T Achieva MRI scanner was obtained of bi-occipital gray matter. Subjects were placed in the scanner and a spectrum acquired every 5.75 minutes for 60 minutes. Linear mixed models were generated to determine the main effects due to differences between groups and times and the interaction. Results: There was a significant group by time effect for N-acetylaspartate (NAA) (P= .02, d= 0.7) and a statistical trend for macromolecule 20 (MM20) (P= .06 d= 0.1) with the control group having higher concentrations than that of the intervention. Mean differences from baseline to 45 minutes for NAA in the intervention group were -0.8 mM (-12%) compared with 0.15 mM (<1%) for control and for MM20 -0.12 mM (<1%) in the intervention group compared with 0.03 mM (<1%) for control. Conclusions: Consumption of two cans of ED was found to produce few changes in brain metabolites with moderate effect sizes. Changes detected in this study demonstrate the sensitivity of the MRS method to explore nutrition related variables with 1.5T clinical MRI unit. The study provides some insight into an understudied, topical area of research.]]> Wed 11 Apr 2018 12:09:41 AEST ]]> Non-rigid correction of interleaving artefacts in pelvic MRI https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:9164 Wed 11 Apr 2018 11:29:56 AEST ]]> Neural responses to visual food cues according to weight status: a systematic review of functional magnetic resonance imaging studies https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:14529 18 years old, reported weight status, and included fMRI outcomes. Sixty studies were identified that investigated the neural responses of healthy weight participants (n = 26), healthy weight compared to obese participants (n = 17), and weight-loss interventions (n = 12). High-calorie food images were used in the majority of studies (n = 36), however, image selection justification was only provided in 19 studies. Obese individuals had increased activation of reward-related brain areas including the insula and orbitofrontal cortex in response to visual food cues compared to healthy weight individuals, and this was particularly evident in response to energy dense cues. Additionally, obese individuals were more responsive to food images when satiated. Meta-analysis of changes in neural activation post-weight loss revealed small areas of convergence across studies in brain areas related to emotion, memory, and learning, including the cingulate gyrus, lentiform nucleus, and precuneus. Differential activation patterns to visual food cues were observed between obese, healthy weight, and weight-loss populations. Future studies require standardization of nutrition variables and fMRI outcomes to enable more direct comparisons between studies.]]> Wed 11 Apr 2018 10:57:34 AEST ]]> Investigation on the performance of dedicated radiotherapy positioning devices for MR scanning for prostate planning https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:28129 3. The external body deformation caused a mean dose reduction of 0.6 ± 0.3 Gy, while the coverage reduced by 22% ± 13% and 27% ± 6% in V98 and V100, respectively. A dedicated MR simulation setup for prostate radiotherapy is essential to ensure the agreement between planning anatomy and treatment anatomy. The image signal was reduced after applying the coil mount, but no significant effect was found on prostate contouring.]]> Wed 11 Apr 2018 09:52:08 AEST ]]> MR spectroscopy findings in retired professional rugby league players https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32339 Thu 24 May 2018 10:50:05 AEST ]]> The prevalence of food addiction as assessed by the Yale Food Addiction Scale: a systematic review https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:18914 35 years, females, and overweight/obese participants. Additionally, YFAS diagnosis and symptom score was higher in clinical samples compared to non-clinical counterparts. YFAS outcomes were related to a range of other eating behavior measures and anthropometrics. Further research is required to explore YFAS outcomes across a broader spectrum of ages, other types of eating disorders and in conjunction with weight loss interventions to confirm the efficacy of the tool to assess for the presence of FA.]]> Thu 20 Sep 2018 15:13:00 AEST ]]> What are the health implications associated with the consumption of energy drinks? A systematic review https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17340 Thu 20 Sep 2018 15:06:33 AEST ]]> Diffusion-weighted imaging of the breast: principles and clinical applications https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:13275 Sat 24 Mar 2018 08:15:16 AEDT ]]> A systematic review of proton magnetic resonance spectroscopy findings in sport-related concussion https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20840 Sat 24 Mar 2018 08:05:57 AEDT ]]> Spectroscopy of reperfused tissue after stroke reveals heightened metabolism in patients with good clinical outcomes https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20363 Sat 24 Mar 2018 07:58:13 AEDT ]]> A systematic review of diffusion tensor imaging findings in sports-related concussion https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21170 ®, MEDLINE®, EMBASE, SPORTDiscus™, Scopus, Web of Science, and Informit; using the key search terms: diffusion tensor imaging, diffusion magnetic resonance imaging, diffusion weighted MRI, diffusion MRI, fractional anisotropy, tractography, apparent diffusion coefficient, magnetic resonance imaging, mild traumatic brain injury, mTBI, traumatic brain injury, concussion, sport, athletic and athlete. Observational, cohort, correlation, cross-sectional and longitudinal studies were all included in the current review. Results of the review found eight articles that met inclusion criteria, which included data on 214 athletes and 96 controls. Seven of eight studies reported some type of DTI abnormality, although the neuroanatomical sites involved varied. Although considerable methodological variations exist across studies, the current review suggests that DTI may possess adequate diagnostic sensitivity to detect SRC in affected athletes. Further longitudinal studies are required to demonstrate its discriminate validity and prognostic capacity within this field.]]> Sat 24 Mar 2018 07:58:05 AEDT ]]> A systematic review and meta-analysis of concussion in Rugby Union https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:17800 Sat 24 Mar 2018 07:57:37 AEDT ]]> A systematic review of concussion in rugby league https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21251 Sat 24 Mar 2018 07:54:34 AEDT ]]> Arterial spin labeling versus bolus-tracking perfusion in hyperacute stroke https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:21327 Sat 24 Mar 2018 07:52:51 AEDT ]]> Transcranial direct current stimulation of prefrontal cortex: an auditory event-related potential and proton magnetic resonance spectroscopy study https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:20124 Sat 24 Mar 2018 07:51:45 AEDT ]]> MRI-alone radiation therapy planning for prostate cancer: automatic fiducial marker detection https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:29967 Sat 24 Mar 2018 07:37:39 AEDT ]]> The stability of 'food addiction' as assessed by the Yale Food Addiction Scale in a non-clinical population over 18-months https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26150 Sat 24 Mar 2018 07:35:26 AEDT ]]> Delay of late-venous phase cortical vein filling in acute ischemic stroke patients: associations with collateral status https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:30085 Sat 24 Mar 2018 07:31:18 AEDT ]]> An open source automatic quality assurance (OSAQA) tool for the ACR MRI phantom https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26953 Sat 24 Mar 2018 07:27:03 AEDT ]]> Cerebrovascular reactivity assessed by transcranial Doppler ultrasound in sport-related concussion: a systematic review https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:26978 Sat 24 Mar 2018 07:26:58 AEDT ]]> Glutamate and glutamine: a review of in vivo MRS in the human brain https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27598 Sat 24 Mar 2018 07:25:17 AEDT ]]> L-COSY of breast cancer at 3T https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:27596 Sat 24 Mar 2018 07:25:16 AEDT ]]> Effect of selected manual therapy interventions for mechanical neck pain on vertebral and internal carotid arterial blood flow and cerebral inflow https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:22298 Sat 24 Mar 2018 07:17:29 AEDT ]]> Arterial spin labeling identifies tissue salvage and good clinical recovery after acute ischemic stroke https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:23590 Sat 24 Mar 2018 07:13:22 AEDT ]]> A preliminary video analysis of concussion in the National Rugby League https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:24660 Sat 24 Mar 2018 07:11:51 AEDT ]]> Response to lipid and metabolite deregulation in BRCA1 and BRCA2 genetic mutations (letter) https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:25019 Sat 24 Mar 2018 07:10:41 AEDT ]]> The influence of initial stroke severity on the likelihood of unfavourable clinical outcome and death at 90 days following acute ischemic stroke: a tertiary hospital stroke register study https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32690 Mon 23 Sep 2019 13:22:20 AEST ]]> Reperfusion therapy in acute ischemic stroke: dawn of a new era? https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32816 Mon 23 Sep 2019 10:52:28 AEST ]]>