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A longitudinal human phantom reliability study of multi-center T1-weighted, DTI, and resting state fMRI data
2018
Psychiatry Research : Neuroimaging
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Here, we sought to establish the utility of a clustering algorithm as an alternative to more traditional intra-class correlation coefficient approaches in a longitudinal multi-center human phantom study ...
With increasing interest in data-driven approaches in psychiatric and neurologic brain imaging studies, our findings provide a framework for multi-center analytic approaches aiming to identify subgroups ...
This provides strong support for the integration of data in multi-center studies, and supports the use of hierarchical clustering to identify individuals across imaging metrics. ...
doi:10.1016/j.pscychresns.2018.06.004
pmid:29945740
pmcid:PMC6482446
fatcat:zbfre24gfvclppt2t6ipwmyrwa
Developing a Neuroimaging Biomarker for Amyotrophic Lateral Sclerosis: Multi-Center Data Sharing and the Road to a "Global Cohort"
2018
Frontiers in Neurology
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This review will use the example of the Neuroimaging Society in ALS (NiSALS) to discuss the set-up of a multi-center data sharing ecosystem and the flow of information between various stakeholders. ...
Multi-center transnational collaborations are needed to address these methodological limitations and achieve representation of rare phenotypes. ...
, while particular higher field strengths and enlarged acquisition resolutions decreased inter-center variability (22) . ...
doi:10.3389/fneur.2018.01055
pmid:30564187
pmcid:PMC6288231
fatcat:bnh7ty4ygbdytbew6rj7xdmd44
The NIH MRI study of normal brain development
2006
NeuroImage
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In a subset, we acquired T1/T2 relaxometry, diffusion tensor imaging, single-voxel proton spectroscopy and spectroscopic imaging. ...
Using a uniform acquisition protocol, data were collected at six Pediatric Study Centers and consolidated at a Data Coordinating Center. ...
Diffusion tensor imaging (DTI) data are analyzed at a DTI Processing Center, National Institute of Child Health and Development (NICHD) NIH (DPC). ...
doi:10.1016/j.neuroimage.2005.09.068
pmid:16376577
fatcat:q7k25iz34rgbpadjdbqcgp7bpy
Pulmonary Emphysema Subtypes on Computed Tomography: The MESA COPD Study
2014
American Journal of Medicine
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Methods-The Multi-Ethnic Study of Atherosclerosis COPD Study recruited smokers with COPD and controls age 50-79 years with ≥10 pack-years. Participants underwent CT following a standardized protocol. ...
Results-Twenty-seven percent of 318 smokers had emphysema on CT. Inter-rater reliability of emphysema subtype was substantial (K:0.70). ...
Acknowledgments FUNDING SOURCES NIH/NHLBI R01-HL093081, R01-HL077612, R01-HL075476, and N01-HC95159-HC95169. Fonds de la recherche en santé Québec. ...
doi:10.1016/j.amjmed.2013.09.020
pmid:24384106
pmcid:PMC3882898
fatcat:744sa4vygrgnxajmh3rei7t4fa
Quantification of Regional Interstitial Lung Disease from CT-derived Fractional Tissue Volume
2011
Academic Radiology
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There is a need for standardized imaging biomarkers to quantify regional disease, maximize diagnostic yield, and facilitate multi-center comparisons. ...
The next step would be to study a larger series, examine reproducibility and follow longitudinal changes in correlation with clinical and functional indices. ...
Acknowledgments Supported by: National Heart, Lung, and Blood Institute grants R03 HL097010 (CY), R01 HL093096 (CKG), a pilot award (to CCH) by the North and Central Texas Clinical and Translational Science ...
doi:10.1016/j.acra.2011.03.004
pmid:21596593
pmcid:PMC3128646
fatcat:bcmxgbyqq5ffdguics4vitxkva
Repetitive Transcranial Magnetic Stimulation with Resting-State Network Targeting for Treatment-Resistant Depression in Traumatic Brain Injury: A Randomized, Controlled, Double-Blinded Pilot Study
2019
Journal of Neurotrauma
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Here, we investigate the use of rTMS targeted with individualized resting-state network mapping (RSNM) of dorsal attention network (DAN) and default mode network (DMN) in subjects with treatment-resistant ...
Treatment was targeted to the dorsolateral prefrontal cluster with maximal difference between DAN and DMN correlations based on resting-state functional magnetic resonance imaging with individualized RSNM ...
The magnitude of inter-individual variability appeared to exceed the intrinsic test-retest reliability of the scans; targets identified using two back-to-back scanning sessions were centered 0.9-8.3 mm ...
doi:10.1089/neu.2018.5889
pmid:30381997
pmcid:PMC6909726
fatcat:ctvgecjwenhkjnvlqrjebjzhpu
A Quantitative Diffuse Reflectance Imaging (QDRI) System for Comprehensive Surveillance of the Morphological Landscape in Breast Tumor Margins
2015
PLoS ONE
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Specifically detailed in this work is the performance and clinical validation of a research-grade intra-operative tool for margin assessment based on diffuse optical spectroscopy. ...
A raster-scanning mechanism was developed to achieve sub-pixel resolution and was found to be optimally performed at an upsample factor of 8, affording 0.75mm spatially resolved diffuse reflectance images ...
Following orientation, the raster-scanning procedure was initiated and the diffuse reflectance spectra were collected across the visible spectrum (λ = 420-700nm). ...
doi:10.1371/journal.pone.0127525
pmid:26076123
pmcid:PMC4468201
fatcat:mc6lxceg6jhlzfaqlksw3p2tqy
Multi-Steps Registration Protocol for Multimodal MR Images of Hip Skeletal Muscles in a Longitudinal Study
2020
Applied Sciences
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The hips of 6 subjects were scanned, in a multimodal protocol, at 2 different time points by a 3 Tesla scanner; the proposed multi-step registration pipeline is based on rigid and elastic transformations ...
This paper aims at proposing a reliable registration protocol and evaluating its accuracy in a longitudinal study. ...
In conclusion, the present study is a first attempt to propose and assess a reliable pipeline for the automated intra-session and longitudinal muscle MR images registration, in a multimodal study. ...
doi:10.3390/app10217823
fatcat:jgalf36uwrdvfabzst7vfyuas4
A Review of Current Challenges and Case Study Toward Optimizing Micro-Computed X-ray Tomography of Carbon Fabric Composites
2020
Materials
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This article, through a review of the state of the art, followed by an example case study on Micro-computed tomography (CT) analysis of low X-ray absorptive dry and prepreg carbon woven fabric composites ...
X-ray computed tomography provides qualitative and quantitative structural and compositional information for a broad range of materials. ...
Segmentation is a challenging task mostly due to (1) wide imaging variability resulting from different imaging modalities, scanning protocols, and scanners parameters; (2) large intra- and inter-sample ...
doi:10.3390/ma13163606
pmid:32824047
pmcid:PMC7475927
fatcat:p7qt3vhah5cwxc5z2zz5a5rrlm
Simulation study of an X-ray diffraction system for breast tumordetection
2017
Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment
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The influence 26 of incident spectrum maximum energy was also studied. The required dose re-27 mained very low with any of the incident spectra tested. ...
This system allows depth-imaging in one go but needs 17 an x,y-direction scan to image the region conventional mammography identified 18 as suspect. ...
The impact of variability of breast thickness 679 and tissue scattering signatures should also be studied. ...
doi:10.1016/j.nima.2017.04.026
fatcat:cocrs3wocrfxdlxdglkmdqjo44
MRI utility in patients with non-traumatic metatarsalgia: A tertiary musculoskeletal center observational study
2015
The Egyptian Journal of Radiology and Nuclear Medicine
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Patients and methods: The study included 125 patients (46 males and 79 female) with a mean age 38.8 years (age range 7-74 years) presented with forefoot pain. ...
Patients with history of a clear recent forefoot trauma, gross osteo-articular deformities and previous forefoot surgery were excluded. ...
Short-axis scans of the forefoot on T1W (a) and PD fat-suppressed image (b) showing fibular-sided subcutaneous multi-lobulated fatty lesions wrapping around its both dorsal and plantar aspects. ...
doi:10.1016/j.ejrnm.2015.08.004
fatcat:z4slvm5gfvb6xdwhqb3qgi7aum
Dissociating Statistically-Determined Alzheimer's Disease/Vascular Dementia Neuropsychological Syndromes Using White and Gray Neuroradiological Parameters
2015
Journal of Alzheimer's Disease
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brain imaging, investigate between group differences in gray and white matter regions of interest. ...
Methods-An analysis of neuropsychological functioning was obtained from dementia patients clinically diagnosed with AD/VaD characterized with significant leukoaraiosis (LA) and/or lacunes where a k-means ...
Study Funding/Disclosures: This study was partially supported by NIH (NINDS K23NS60660 and ROI NS082386; NINR ROI NR014181; CP) and Alzheimer's Association IIRG0627542 (DJL). ...
doi:10.3233/jad-150407
pmid:26402109
pmcid:PMC4724866
fatcat:5yxfvoghbvdttp4sgdkbffxuqm
Progression of Regional Microstructural Degeneration in Parkinson's Disease: A Multicenter Diffusion Tensor Imaging Study
2016
PLoS ONE
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Automated image processing included an intra-subject registration of all time points and an inter-subjects registration to a brain atlas. ...
This study aimed to identify the utility of diffusion tensor imaging (DTI) in measuring the regional distribution of abnormal microstructural progression in patients with Parkinson's disease who were enrolled ...
Lastly, the study demonstrates the practicability of multi-center diffusion imaging in PD. Several limitations of our study should be mentioned. ...
doi:10.1371/journal.pone.0165540
pmid:27798653
pmcid:PMC5087900
fatcat:hlcxksn6h5bw7fs7sfee254js4
Variable echo time imaging for detecting the short T2* components of the sciatic nerve: a validation study
2020
Magnetic Resonance Materials in Physics, Biology and Medicine
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Good-to-excellent repeatability and reproducibility were found for geometry of ROIs (Dice indices: intra-rater 0.68-0.7; inter-rater 0.70-0.72) and the related aT2* measures (intra-inter reader ICC 0.95 ...
The aim of this study was to develop and validate an MRI protocol based on a variable echo time (vTE) sensitive to the short T2* components of the sciatic nerve. 15 healthy subjects (M/F: 9/6; age: 21- ...
Further studies correlating imaging and pathological findings in a spectrum of inflammatory, vascular degenerative diseases of the sciatic nerve are warranted. ...
doi:10.1007/s10334-020-00886-w
pmid:32964300
fatcat:65irw4q5szbmvfgpsju4sme624
COMPULS: design of a multicenter phenotypic, cognitive, genetic, and magnetic resonance imaging study in children with compulsive syndromes
2016
BMC Psychiatry
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Methods: The COMPULS study is a multi-center study designed to investigate the relationship between the traits compulsivity, impulsivity, and, to a lesser extent, addictive behaviour within and across ...
Discussion: The COMPULS study will offer the unique opportunity to investigate several key aspects of compulsivity across a large cohort of ADHD, ASD and OCD patients. ...
Acknowledgements The authors would like to thank The TACTICS Consortium Group, consisting of Jan Buitelaar, Saskia de Ruiter, Jilly ...
doi:10.1186/s12888-016-1072-6
pmid:27782808
pmcid:PMC5080712
fatcat:6ufp3eotaje6bdznpdwnpyh2nu
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