cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5281/zenodo.13323822
title: MRI raw data to publication: Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation.

description: These Data are refering to the maunscript "Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation" authored by 

Renzo Huber1, Rüdiger Stirnberg2, A Tyler Morgan1, David A Feinberg3,4-5, Samantha J Ma6, Philipp Ehses3, Omer Faruk Gulban2,7, Kenshu Koiso2, Isabel Gephart1, Stephanie Swegle1, Susan Wardle1, Emily Ma2, Andrew Persichetti1, Alexander JS Beckett4-5, Tony Stöcker3, Nicolas Boulant8, Benedikt A Poser2, Peter Bandettini1

 

1 NIMH, NIH, Bethesda, United States,

2 German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany,

3 Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States, 

4 Advanced MRI Technologies, Sebastopol, CA, United States,

5 CN, FPN, University of Maastricht, The Netherlands,

6 Siemens Medical Solutions USA, Inc., Berkeley, CA, USA,

7 Brain Innovation, Maastricht, The Netherlands,

8 CEA, NeuroSpin, University Paris Saclay, France.

 

Abstract

Purpose: High resolution fMRI is an emerging research field focused on capturing functional signal changes across cortical layers. However, the data acquisition is limited by low spatial frequency EPI artifacts; termed as Fuzzy Ripples. These artifacts limit the practical applicability of acquisition protocols with higher spatial resolution, faster acquisition speed, and they challenge imaging in lower brain areas. 

Methods: We characterize Fuzzy Ripple artifacts across commonly used sequences and distinguish them from conventional EPI Nyquist ghosts, off-resonance effects, and GRAPPA artifacts. To investigate their origin, we employ dual polarity readouts.

Results: Our findings indicate that Fuzzy Ripples are primarily caused by kx-specific imperfections in gradient trajectories, which can be exacerbated by inductive coupling between third-order shims and readout gradients. We also find that these artifacts can be mitigated through complex-valued averaging of dual polarity EPI or by disconnecting the third-order shim.

Conclusion: The proposed mitigation strategies allow for overcoming current limitations in layer-fMRI protocols: 

(1) Achieving resolutions beyond 0.8mm is feasible, and even at 3T, we achieved 0.53mm voxel functional connectivity mapping. 

(2) Temporal acquisition speed can be increased to GRAPPA 8. 

(3) Sub-millimeter fMRI is achievable in lower brain areas, including the cerebellum.
DOI: 10.5281/zenodo.13326459
title: MRI raw data to publication: Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation.

description: These Data are refering to the maunscript "Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation" authored by 

Renzo Huber1, Rüdiger Stirnberg2, A Tyler Morgan1, David A Feinberg3,4-5, Samantha J Ma6, Philipp Ehses3, Omer Faruk Gulban2,7, Kenshu Koiso2, Isabel Gephart1, Stephanie Swegle1, Susan Wardle1, Emily Ma2, Andrew Persichetti1, Alexander JS Beckett4-5, Tony Stöcker3, Nicolas Boulant8, Benedikt A Poser2, Peter Bandettini1

 

1 NIMH, NIH, Bethesda, United States,

2 German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany,

3 Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States, 

4 Advanced MRI Technologies, Sebastopol, CA, United States,

5 CN, FPN, University of Maastricht, The Netherlands,

6 Siemens Medical Solutions USA, Inc., Berkeley, CA, USA,

7 Brain Innovation, Maastricht, The Netherlands,

8 CEA, NeuroSpin, University Paris Saclay, France.

 

Abstract

Purpose: High resolution fMRI is an emerging research field focused on capturing functional signal changes across cortical layers. However, the data acquisition is limited by low spatial frequency EPI artifacts; termed as Fuzzy Ripples. These artifacts limit the practical applicability of acquisition protocols with higher spatial resolution, faster acquisition speed, and they challenge imaging in lower brain areas. 

Methods: We characterize Fuzzy Ripple artifacts across commonly used sequences and distinguish them from conventional EPI Nyquist ghosts, off-resonance effects, and GRAPPA artifacts. To investigate their origin, we employ dual polarity readouts.

Results: Our findings indicate that Fuzzy Ripples are primarily caused by kx-specific imperfections in gradient trajectories, which can be exacerbated by inductive coupling between third-order shims and readout gradients. We also find that these artifacts can be mitigated through complex-valued averaging of dual polarity EPI or by disconnecting the third-order shim.

Conclusion: The proposed mitigation strategies allow for overcoming current limitations in layer-fMRI protocols: 

(1) Achieving resolutions beyond 0.8mm is feasible, and even at 3T, we achieved 0.53mm voxel functional connectivity mapping. 

(2) Temporal acquisition speed can be increased to GRAPPA 8. 

(3) Sub-millimeter fMRI is achievable in lower brain areas, including the cerebellum.
DOI: 10.5281/zenodo.14289909
title: MRI raw data to publication: Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation.

description: These Data are refering to the maunscript "Fuzzy ripple artifact in high resolution fMRI: identification, cause, and mitigation" authored by 

Renzo Huber1, Rüdiger Stirnberg2, A Tyler Morgan1, David A Feinberg3,4-5, Samantha J Ma6, Philipp Ehses3, Omer Faruk Gulban2,7, Kenshu Koiso2, Isabel Gephart1, Stephanie Swegle1, Susan Wardle1, Emily Ma2, Andrew Persichetti1, Alexander JS Beckett4-5, Tony Stöcker3, Nicolas Boulant8, Benedikt A Poser2, Peter Bandettini1

 

1 NIMH, NIH, Bethesda, United States,

2 German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany,

3 Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA, United States, 

4 Advanced MRI Technologies, Sebastopol, CA, United States,

5 CN, FPN, University of Maastricht, The Netherlands,

6 Siemens Medical Solutions USA, Inc., Berkeley, CA, USA,

7 Brain Innovation, Maastricht, The Netherlands,

8 CEA, NeuroSpin, University Paris Saclay, France.

 

Abstract

Purpose: High resolution fMRI is an emerging research field focused on capturing functional signal changes across cortical layers. However, the data acquisition is limited by low spatial frequency EPI artifacts; termed as Fuzzy Ripples. These artifacts limit the practical applicability of acquisition protocols with higher spatial resolution, faster acquisition speed, and they challenge imaging in lower brain areas. 

Methods: We characterize Fuzzy Ripple artifacts across commonly used sequences and distinguish them from conventional EPI Nyquist ghosts, off-resonance effects, and GRAPPA artifacts. To investigate their origin, we employ dual polarity readouts.

Results: Our findings indicate that Fuzzy Ripples are primarily caused by kx-specific imperfections in gradient trajectories, which can be exacerbated by inductive coupling between third-order shims and readout gradients. We also find that these artifacts can be mitigated through complex-valued averaging of dual polarity EPI or by disconnecting the third-order shim.

Conclusion: The proposed mitigation strategies allow for overcoming current limitations in layer-fMRI protocols: 

(1) Achieving resolutions beyond 0.8mm is feasible, and even at 3T, we achieved 0.53mm voxel functional connectivity mapping. 

(2) Temporal acquisition speed can be increased to GRAPPA 8. 

(3) Sub-millimeter fMRI is achievable in lower brain areas, including the cerebellum.
DOI: 10.15468/dl.g6pp2a
title: Occurrence Download

description: A dataset containing 79200 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Platalea minor Temminck & Schlegel, 1849"
 ]
}

 The dataset includes 79200 records from 67 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023155-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.7f2952
title: Occurrence Download

description: A dataset containing 387 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Colombia",
 "TaxonKey is Vampyriscus nymphaea (Thomas, 1909)"
 ]
}

 The dataset includes 387 records from 25 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023157-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.gs2gkt
title: Occurrence Download

description: A dataset containing 133024 species occurrences available in GBIF matching the query:
{
 "and" : [
 "HasGeospatialIssue is one of (FALSE)",
 "OccurrenceStatus is one of (Present)",
 "HasCoordinate is one of (TRUE)",
 "Geometry POLYGON ((-85.50909302835785 36.269232189195904, -85.52038800252491 36.26878428114912, -85.53157381475404 36.26744488593628, -85.54254236928237 36.26522694805688, -85.55318769185013 36.26215190116312, -85.5634069634613 36.25824945879078, -85.57310152211019 36.25355732436671, -85.58217782237979 36.248120823435286, -85.59054834330634 36.24199246182748, -85.59813243549958 36.235231414234555, -85.60485709919973 36.22790294833564, -85.61065768573019 36.22007779025722, -85.61547851565716 36.21183143770668, -85.61927340788067 36.20324342761593, -85.62200611484309 36.194396565550996, -85.62365066003713 36.185376124484854, -85.62419157501466 36.17626902079357, -85.62362403412381 36.16716297551592, -85.62195388622726 36.158145669016875, -85.6191975836638 36.14930389721411, -85.61538200970186 36.1407227374666, -85.6105442066851 36.13248473208772, -85.60473100798139 36.12466909723451, -85.59799857770783 36.117350964644054, -85.59041186301295 36.11060066334085, -85.58204396444592 36.10448304803059, -85.57297543062926 36.09905688042989, -85.56329348407314 36.09437426926436, -85.55309118552351 36.09048017410299, -85.54246654472246 36.08741197759176, -85.53152158587564 36.085199130007865, -85.52036137646948 36.0838628693844, -85.50909302835785 36.08341601975905, -85.49782468024621 36.0838628693844, -85.48666447084007 36.085199130007865, -85.47571951199323 36.08741197759176, -85.46509487119218 36.09048017410299, -85.45489257264256 36.09437426926436, -85.44521062608645 36.09905688042989, -85.43614209226978 36.10448304803059, -85.42777419370276 36.11060066334085, -85.42018747900788 36.117350964644054, -85.41345504873433 36.12466909723451, -85.40764185003059 36.13248473208772, -85.40280404701384 36.1407227374666, -85.39898847305189 36.14930389721411, -85.39623217048845 36.158145669016875, -85.39456202259188 36.16716297551592, -85.39399448170104 36.17626902079357, -85.39453539667856 36.185376124484854, -85.39617994187262 36.194396565550996, -85.39891264883502 36.20324342761593, -85.40270754105856 36.21183143770668, -85.4075283709855 36.22007779025722, -85.41332895751596 36.22790294833564, -85.42005362121611 36.235231414234555, -85.42763771340937 36.24199246182748, -85.43600823433593 36.248120823435286, -85.44508453460551 36.25355732436671, -85.4547790932544 36.25824945879078, -85.46499836486556 36.26215190116312, -85.47564368743332 36.26522694805688, -85.48661224196167 36.26744488593628, -85.49779805419078 36.26878428114912, -85.50909302835785 36.269232189195904))",
 "Year is greater than or equal to 2008",
 "Year is less than or equal to 2024"
 ]
}

 The dataset includes 133024 records from 18 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023119-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.23kynq
title: Occurrence Download

description: A dataset containing 1076178582 species occurrences available in GBIF matching the query:
{
 "Continent" : [
 "is Europe"
 ]
}

 The dataset includes 1076178582 records from 34936 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0023121-241126133413365/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.98neuc
title: Occurrence Download

description: A dataset containing 182 species occurrences available in GBIF matching the query:
{
 "DatasetKey" : [
 "is The importance of fouling in the port of Ostend in 1964"
 ]
}

 The dataset includes 182 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001342-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.x5azvx
title: Occurrence Download

description: A dataset containing 386369 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "CoordinateUncertaintyInMeters 0.0-5000.0",
 "GbifRegion is Europe and Central Asia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Oryctolagus cuniculus",
 "Year 2000-2025"
 ]
}

 The dataset includes 386369 records from 1502 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001331-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.w3wfr4
title: Occurrence Download

description: A dataset containing 21644 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "CoordinateUncertaintyInMeters 0.0-5000.0",
 "GbifRegion is Europe and Central Asia",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Procyon lotor",
 "Year 2000-2025"
 ]
}

 The dataset includes 21644 records from 108 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001343-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.72jzye
title: Occurrence Download

description: A dataset containing 1306 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Human Observation",
 "CoordinateUncertaintyInMeters 0.0-10000.0",
 "Geometry POLYGON((-127.43608 24.11075,-65.71433 24.11075,-65.71433 50.17568,-127.43608 50.17568,-127.43608 24.11075))",
 "TaxonKey is Scantius aegyptius"
 ]
}

 The dataset includes 1306 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001344-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34740/kaggle/dsv/13511813
title: Peer-to-Peer Boliviano (BOB) Exchange Data
DOI: 10.15468/dl.bqvpq3
title: Occurrence Download

description: A dataset containing 104202 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Human Observation, Observation, Occurrence evidence, Living Specimen, Machine Observation)",
 "Geometry POLYGON((-80.80669 25.83976,-83.42357 30.8855,-94.89757 30.192,-98.92353 26.83197,-98.42029 21.41511,-96.4073 18.00466,-92.38134 17.33336,-84.73201 14.91633,-83.62487 9.40881,-78.18981 8.11568,-72.15087 10.89487,-61.48206 8.61357,-60.87817 18.38712,-70.84243 18.57804,-76.47878 20.75775,-80.80669 25.83976))",
 "HasGeospatialIssue is false",
 "Issue is one of (Coordinate rounded, Geodetic datum assumed WGS84, Country derived from coordinates, Continent derived from country, Continent derived from coordinates)",
 "OccurrenceStatus is Present",
 "TaxonKey is one of (Rhodophyta, Chlorophyta, Phaeophyceae)"
 ]
}

 The dataset includes 104202 records from 105 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001337-251025141854904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25919/qefv-pv47
title: Long-term project observations for project P885 semester 2025OCTS_01

description: We propose a modest program to continue monitoring 4 of the 6 known radio magnetars in order to achieve three primary science goals. The first is to characterise magnetar outbursts over long timescales, for which tracking their rotational, flux density, and polarisation properties provide a clear view of the impulse response of their magnetic fields. Second, understanding the links between magnetars the mysterious fast radio burst phenomenon through the discovery of rare emission and propagation effects, shared spectro-temporal phenomenology, and connections to high-energy (X-ray/gamma-ray) phenomena. Lastly, our continued monitoring has enormous benefit to the wider magnetar community, providing rapid alerts to changes in activity, adding context to unusual behaviour detected by high-energy observations, and a host of supplementary science through the teams extensive collaborative networks. The project and its precursors have been running since 2007 and have contributed to 21 publications since then. We are seeking to convert the project to long-term status, thereby also carrying these investigations into the SKA era.
DOI: 10.25549/independent-c69-11968
title: Transcripts from Independent Commission public hearing, 1991-05-01

description: Paperwork and transcript from Independent Commission public meeting, 1991 May 1 - June 6. PART OF A SERIES: The series consists of miscellaneous source materials that were collected and analyzed over the course of the Independent Commission's investigation. Included are the following: article clippings pertaining to the Rodney King incident; legal materials related to the Gates v. Board of Los Angeles Police Commissioners case, including appellate documents, court transcripts, preliminary injunctions, and briefs; black-and-white photographs; essays and articles related to police misconduct; issues of The Thin Blue Line, the Los Angeles Police Protective League's monthly publication, and Perspectives on Policing, a newsletter published by the United States Department of Justice; materials regarding policing issues in other major United States cities, including commission reports and Pate and Hamilton's book The Big Six: Policing America's Largest Cities; supplemental materials and appendices to the Independent Commission's report; requests for copies of the Commission report; transcripts from public hearings conducted by members of the Commission; and instructional materials related to the Video Incident Capture System, a video camera system that provides video and audio records of police officers' activities while on patrol.
DOI: 10.15468/dl.ckmq79
title: Occurrence Download

description: A dataset containing 106 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Ailuropoda melanoleuca (David, 1869)"
 ]
}

 The dataset includes 106 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001105-150221044754056/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-12634
title: A need for change: confronting the problems of the LAPD, 1991-05-01

description: A need for change: confronting the problems of the Los Angeles Police Department. Testimony of Ramona Ripston, Executive Director, ACLU of Southern California before the Special Independent Commission on the Los Angeles Police Department, 1991 May 1. PART OF A SERIES: The staff of Skadden, Arps, Slate, Meagher & Flom assisted the Commission's investigation by coordinating interviews and compiling and synthesizing witness declarations. Included in the series are biographies of several expert witnesses solicited by the Commission, as well as three witnesses' written testimonies. Also included are statistics provided by the Police Misconduct Lawyer Referral Service, a nonprofit organization that counsels victims of police abuse, and one article regarding the critical role that mayors play in the implementation of police policy.
DOI: 10.15468/dl.gqw42a
title: Occurrence Download

description: A dataset containing 0 species occurrences available in GBIF matching the query:
{
 "SpeciesKey" : [
 "is Goodenia macrophylla"
 ]
}

 The dataset includes 0 records from 0 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002670-240506114902167/datasets/export for details.
DOI: 10.15468/dl.feurpd
title: Occurrence Download

description: A dataset containing 391 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Solanum aculeatissimum Jacq.",
 "HasGeospatialIssue is false",
 "HasCoordinate is true"
 ]
}

 The dataset includes 391 records from 41 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001105-150316153013904/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tey39h
title: Occurrence Download

description: A dataset containing 2033 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Mexico",
 "TaxonKey is Caretta caretta (Linnaeus, 1758)"
 ]
}

 The dataset includes 2033 records from 71 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0012689-230918134249559/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-12636
title: A need for change: confronting the problems of the LAPD, 1991-05-01

description: A need for change: confronting the problems of the Los Angeles Police Department. Testimony of Ramona Ripston, Executive Director, ACLU of Southern California before the Special Independent Commission on the Los Angeles Police Department, 1991 May 1. PART OF A SERIES: The staff of Skadden, Arps, Slate, Meagher & Flom assisted the Commission's investigation by coordinating interviews and compiling and synthesizing witness declarations. Included in the series are biographies of several expert witnesses solicited by the Commission, as well as three witnesses' written testimonies. Also included are statistics provided by the Police Misconduct Lawyer Referral Service, a nonprofit organization that counsels victims of police abuse, and one article regarding the critical role that mayors play in the implementation of police policy.
DOI: 10.15468/dl.swuajo
title: Occurrence Download

description: A dataset containing 295 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Lathyrus pulcher Salisb.",
 "Country is Spain"
 ]
}

 The dataset includes 295 records from 15 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001105-150410134957023/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.2bdygv
title: Occurrence Download

description: A dataset containing 5494 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Gallotia galloti (Oudart, 1839)"
 ]
}

 The dataset includes 5494 records from 42 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0002715-231002084531237/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.