Keyword search (3,619 papers available)


Class imbalance should not throw you off balance: Choosing the right classifiers and performance metrics for brain decoding with imbalanced data

Author(s): Thölke P; Mantilla-Ramos YJ; Abdelhedi H; Maschke C; Dehgan A; Harel Y; Kemtur A; Mekki Berrada L; Sahraoui M; Young T; Bellemare Pépin A; E...

Machine learning (ML) is increasingly used in cognitive, computational and clinical neuroscience. The reliable and efficient application of ML requires a sound understanding of its subtleties and l...

Article GUID: 37385392
A dataset of multi-contrast unbiased average MRI templates of a Parkinson's disease population

Author(s): Madge V; Fonov VS; Xiao Y; Zou L; Jackson C; Postuma RB; Dagher A; Fon EA; Collins DL;

Parkinson's disease (PD) is a complex neurodegenerative disorder affecting regions such as the substantia nigra (SN), red nucleus (RN) and locus coeruleus (LC). Processing MRI data from patients with PD requires anatomical structural references for spat...

Article GUID: 37213552
Primary and Secondary Progressive Aphasia in Posterior Cortical Atrophy

Author(s): Brodeur C; Belley É; Deschênes LM; Enriquez-Rosas A; Hubert M; Guimond A; Bilodeau J; Soucy JP; Macoir J;...

Background: Posterior cortical atrophy (PCA) is a clinico-radiological syndrome characterized by a progressive decline in visuospatial/visuoperceptual processing. PCA is accompanied by the impairme...

Article GUID: 35629330
Associations of the BDNF Val66Met Polymorphism With Body Composition, Cardiometabolic Risk Factors, and Energy Intake in Youth With Obesity: Findings From the HEARTY Study

Author(s): Goldfield GS; Walsh J; Sigal RJ; Kenny GP; Hadjiyannakis S; De Lisio M; Ngu M; Prud' homme D; Alberga AS; Doucette S; Goldfield DB; Came...

The brain-derived neurotrophic factor (BDNF) Val66Met polymorphism is functionally related to BDNF, and is associated with obesity and metabolic complications in adults, but limited research exists...

Article GUID: 34867148
The BigBrainWarp toolbox for integration of BigBrain 3D histology with multimodal neuroimaging

Author(s): Paquola C; Royer J; Lewis LB; Lepage C; Glatard T; Wagstyl K; DeKraker J; Toussaint PJ; Valk SL; Collins DL; Khan A; Amunts K; Evans AC; Dic...

Neuroimaging stands to benefit from emerging ultrahigh-resolution 3D histological atlases of the human brain; the first of which is 'BigBrain'. Here, we review recent methodological advance...

Article GUID: 34431476
Lateral Position-Dependent Velocity Estimation Error in Plane-Wave Doppler Ultrasound Systems

Author(s): Wei L; Williams R; Loupas T; Helfield B; Burns PN;

Doppler ultrasound has become a standard method used to diagnose and grade vascular diseases and monitor their progression. Conventional focused-beam color Doppler imaging is routinely used in clinical practice, but suffers from inherent trade-offs between ...

Article GUID: 34006440
Tools and Techniques for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)/COVID-19 Detection

Author(s): Safiabadi Tali SH; LeBlanc JJ; Sadiq Z; Oyewunmi OD; Camargo C; Nikpour B; Armanfard N; Sagan SM; Jahanshahi-Anbuhi S;...

The coronavirus disease 2019 (COVID-19) pandemic, caused by severe acute respiratory disease coronavirus 2 (SARS-CoV-2), has led to millions of confirmed cases and deaths worldwide. Efficient diagn...

Article GUID: 33980687
Comparing perturbation models for evaluating stability of neuroimaging pipelines.

Author(s): Kiar G, de Oliveira Castro P, Rioux P, Petit E, Brown ST, Evans AC, Glatard T

With an increase in awareness regarding a troubling lack of reproducibility in analytical software tools, the degree of validity in scientific derivatives and their downstream results has become unclear. The nature of reproducibility issues may vary across ...

Article GUID: 32831546
Two-stage ultrasound image segmentation using U-Net and test time augmentation.

Author(s): Amiri M; Brooks R; Behboodi B; Rivaz H;

PURPOSE: Detecting breast lesions using ultrasound imaging is an important application of computer-aided diagnosis systems. Several automatic methods have been proposed for breast lesion detection and segmentation; however, due to the ultrasound artefacts, ...

Article GUID: 32350786
BOLD signal physiology: Models and applications.

Author(s): Gauthier CJ, Fan AP

Neuroimage. 2019 02 15;187:116-127 Authors: Gauthier CJ, Fan AP

Article GUID: 29544818
Exploring the alpha desynchronization hypothesis in resting state networks with intracranial electroencephalography and wiring cost estimates.

Author(s): Gómez-Ramírez J, Freedman S, Mateos D, Pérez Velázquez JL, Valiante TA

Sci Rep. 2017 Nov 15;7(1):15670 Authors: Gómez-Ramírez J, Freedman S, Mateos D, Pérez Velázquez JL, Valiante TA

Article GUID: 29142213
Dance and music share gray matter structural correlates.

Author(s): Karpati FJ, Giacosa C, Foster NEV, Penhune VB, Hyde KL

Brain Res. 2017 02 15;1657:62-73 Authors: Karpati FJ, Giacosa C, Foster NEV, Penhune VB, Hyde KL

Article GUID: 27923638
Cyberinfrastructure for Open Science at the Montreal Neurological Institute.

Author(s): Das S, Glatard T, Rogers C, Saigle J, Paiva S, MacIntyre L, Safi-Harab M, Rousseau ME, Stirling J, Khalili-Mahani N, MacFarlane D, Kostopoul...

Front Neuroinform. 2016;10:53 Authors: Das S, Glatard T, Rogers C, Saigle J, Paiva S, MacIntyre L, Safi-Harab M, Rousseau ME, Stirling J, Khalili-Mahani N, MacFarlane D, Kostopoulos P, Rioux P, Ma...

Article GUID: 28111547
Best practices in data analysis and sharing in neuroimaging using MRI.

Author(s): Nichols TE, Das S, Eickhoff SB, Evans AC, Glatard T, Hanke M, Kriegeskorte N, Milham MP, Poldrack RA, Poline JB, Proal E, Thirion B, Van Ess...

Nat Neurosci. 2017 Feb 23;20(3):299-303 Authors: Nichols TE, Das S, Eickhoff SB, Evans AC, Glatard T, Hanke M, Kriegeskorte N, Milham MP, Poldrack RA, Poline JB, Proal E, Thirion B, Van Essen DC, ...

Article GUID: 28230846
Neuroimaging tests for clinical psychiatry: Are we there yet?

Author(s): Leyton M, Kennedy SH

J Psychiatry Neurosci. 2017 06;42(4):219-221 Authors: Leyton M, Kennedy SH PMID: 28639935 [PubMed - indexed for MEDLINE]

Article GUID: 28639935
Experimental Investigation of Left Ventricular Flow Patterns After Percutaneous Edge-to-Edge Mitral Valve Repair.

Author(s): Jeyhani M, Shahriari S, Labrosse M

Artif Organs. 2018 May;42(5):516-524 Authors: Jeyhani M, Shahriari S, Labrosse M

Article GUID: 29168199
The first MICCAI challenge on PET tumor segmentation.

Author(s): Hatt M, Laurent B, Ouahabi A, Fayad H, Tan S, Li L, Lu W, Jaouen V, Tauber C, Czakon J, Drapejkowski F, Dyrka W, Camarasu-Pop S, Cervenansky...

Med Image Anal. 2018 02;44:177-195 Authors: Hatt M, Laurent B, Ouahabi A, Fayad H, Tan S, Li L, Lu W, Jaouen V, Tauber C, Czakon J, Drapejkowski F, Dyrka W, Camarasu-Pop S, Cervenansky F, Girard P...

Article GUID: 29268169
Cluster based statistical feature extraction method for automatic bleeding detection in wireless capsule endoscopy video.

Author(s): Ghosh T, Fattah SA, Wahid KA, Zhu WP, Ahmad MO

Comput Biol Med. 2018 03 01;94:41-54 Authors: Ghosh T, Fattah SA, Wahid KA, Zhu WP, Ahmad MO

Article GUID: 29407997
Muscle Mass and Mortality After Cardiac Transplantation.

Author(s): Bibas L, Saleh E, Al-Kharji S, Chetrit J, Mullie L, Cantarovich M, Cecere R, Giannetti N, Afilalo J

Transplantation. 2018 12;102(12):2101-2107 Authors: Bibas L, Saleh E, Al-Kharji S, Chetrit J, Mullie L, Cantarovich M, Cecere R, Giannetti N, Afilalo J

Article GUID: 29877924
Efficacy of Auditory versus Motor Learning for Skilled and Novice Performers.

Author(s): Brown RM, Penhune VB

J Cogn Neurosci. 2018 11;30(11):1657-1682 Authors: Brown RM, Penhune VB

Article GUID: 30156505
Title:Lateral Position-Dependent Velocity Estimation Error in Plane-Wave Doppler Ultrasound Systems
Authors:Wei L,  Williams R,  Loupas T,  Helfield B,  Burns PN, 
Link:https://pubmed.ncbi.nlm.nih.gov/34006440/
DOI:10.1016/j.ultrasmedbio.2021.03.023
Category:
PMID:34006440
Dept Affiliation: IMAGING
1 Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Research Institute, Toronto, Ontario, Canada.
2 Sunnybrook Research Institute, Toronto, Ontario, Canada.
3 Philips Ultrasound, Bothell, Washington, USA.
4 Concordia University, Montreal, Quebec, Canada.
5 Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Research Institute, Toronto, Ontario, Canada. Electronic address: Petern.burns@utoronto.ca.

Description:

Doppler ultrasound has become a standard method used to diagnose and grade vascular diseases and monitor their progression. Conventional focused-beam color Doppler imaging is routinely used in clinical practice, but suffers from inherent trade-offs between spatial, temporal and velocity resolution. Newer, plane-wave Doppler imaging offers rapid simultaneous acquisition of B-mode, color and spectral Doppler information across large fields of view, making it a potentially useful method for quantitative estimation of blood flow velocities in the clinic. However, plane-wave imaging can lead to a substantial error in velocity estimation, which is dependent on the lateral location within the image. This is seen in both clinical and experimental plane-wave systems. In the work described in this article, we quantified this velocity error under different geometric and beamforming conditions using numerical simulation and experimental phantoms. We found that the lateral-dependent velocity errors are caused by asymmetrical geometric spectral broadening, and outline a correction algorithm that can mitigate these errors.