Search Results - "Helmer, Karl G"

Multi-vendor and multisite evaluation of cerebrovascular reactivity mapping using hypercapnia challenge by Liu, Peiying, Jiang, Dengrong, Albert, Marilyn, Bauer, Christopher E., Caprihan, Arvind, Gold, Brian T., Greenberg, Steven M., Helmer, Karl G., Jann, Kay, Jicha, Gregory, Rodriguez, Pavel, Satizabal, Claudia L., Seshadri, Sudha, Singh, Herpreet, Thompson, Jeffrey F., Wang, Danny J.J., Lu, Hanzhang

“…Cerebrovascular reactivity (CVR), which measures the ability of cerebral blood vessels to dilate or constrict in response to vasoactive stimuli such as CO2…”
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Demonstration of nonlinearity bias in the measurement of the apparent diffusion coefficient in multicenter trials by Malyarenko, Dariya I., Newitt, David, J. Wilmes, Lisa, Tudorica, Alina, Helmer, Karl G., Arlinghaus, Lori R., Jacobs, Michael A., Jajamovich, Guido, Taouli, Bachir, Yankeelov, Thomas E., Huang, Wei, Chenevert, Thomas L.

“…Purpose Characterize system‐specific bias across common magnetic resonance imaging (MRI) platforms for quantitative diffusion measurements in multicenter…”
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NIDM-Terms: community-based terminology management for improved neuroimaging dataset descriptions and query by Queder, Nazek, Tien, Vivian B, Abraham, Sanu Ann, Urchs, Sebastian Georg Wenzel, Helmer, Karl G, Chaplin, Derek, van Erp, Theo G M, Kennedy, David N, Poline, Jean-Baptiste, Grethe, Jeffrey S, Ghosh, Satrajit S, Keator, David B

“…The biomedical research community is motivated to share and reuse data from studies and projects by funding agencies and publishers. Effectively combining and…”
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Instrumental validation of free water, peak‐width of skeletonized mean diffusivity, and white matter hyperintensities: MarkVCID neuroimaging kits by Maillard, Pauline, Lu, Hanzhang, Arfanakis, Konstantinos, Gold, Brian T., Bauer, Christopher E., Zachariou, Valentinos, Stables, Lara, Wang, Danny J.J., Jann, Kay, Seshadri, Sudha, Duering, Marco, Hillmer, Laura J., Rosenberg, Gary A., Snoussi, Haykel, Sepehrband, Farshid, Habes, Mohamad, Singh, Baljeet, Kramer, Joel H., Corriveau, Roderick A., Singh, Herpreet, Schwab, Kristin, Helmer, Karl G., Greenberg, Steven M., Caprihan, Arvind, DeCarli, Charles, Satizabal, Claudia L.

“…Introduction To describe the protocol and findings of the instrumental validation of three imaging‐based biomarker kits selected by the MarkVCID consortium:…”
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Data sharing in neuroimaging research by Poline, Jean-Baptiste, Breeze, Janis L, Ghosh, Satrajit, Gorgolewski, Krzysztof, Halchenko, Yaroslav O, Hanke, Michael, Haselgrove, Christian, Helmer, Karl G, Keator, David B, Marcus, Daniel S, Poldrack, Russell A, Schwartz, Yannick, Ashburner, John, Kennedy, David N

“…Significant resources around the world have been invested in neuroimaging studies of brain function and disease. Easier access to this large body of work…”
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Characterization of Diffusion Metric Map Similarity in Data From a Clinical Data Repository Using Histogram Distances by Warner, Graham C, Helmer, Karl G

“…As the sharing of data is mandated by funding agencies and journals, reuse of data has become more prevalent. It becomes imperative, therefore, to develop…”
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The Neuroimaging Data Model Linear Regression Tool (nidm_linreg): PyNIDM Project [version 1; peer review: 1 approved with reservations, 1 not approved] by Kumar, Ashmita, Crowley, Albert, Queder, Nazek, Poline, JB, Ghosh, Satrajit S, Kennedy, David, Grethe, Jeffrey S, Helmer, Karl G, Keator, David B

“…The Neuroimaging Data Model (NIDM) is a series of specifications for describing all aspects of the neuroimaging data lifecycle from raw data to analyses and…”
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Separating changes in the intra- and extracellular water apparent diffusion coefficient following focal cerebral ischemia in the rat brain by Silva, Matthew D., Omae, Tsuyoshi, Helmer, Karl G., Li, Fuhai, Fisher, Marc, Sotak, Christopher H.

“…Selective intracellular (IC) and extracellular (EC) brain water apparent diffusion coefficient (ADC) values were measured in normal and ischemic rat brain…”
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Transformer-based deep learning denoising of single and multi-delay 3D arterial spin labeling by Shou, Qinyang, Zhao, Chenyang, Shao, Xingfeng, Jann, Kay, Kim, Hosung, Helmer, Karl G, Lu, Hanzhang, Wang, Danny J J

“…To present a Swin Transformer-based deep learning (DL) model (SwinIR) for denoising single-delay and multi-delay 3D arterial spin labeling (ASL) and compare…”
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Microstructural status of ipsilesional and contralesional corticospinal tract correlates with motor skill in chronic stroke patients by Schaechter, Judith D., Fricker, Zachary P., Perdue, Katherine L., Helmer, Karl G., Vangel, Mark G., Greve, Douglas N., Makris, Nikos

“…Greater loss in structural integrity of the ipsilesional corticospinal tract (CST) is associated with poorer motor outcome in patients with hemiparetic stroke…”
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Multispectral tissue characterization in a RIF-1 tumor model: Monitoring the ADC and T2 responses to single-dose radiotherapy. Part II by Henning, Erica C., Azuma, Chieko, Sotak, Christopher H., Helmer, Karl G.

“…A multispectral (MS) approach that combines apparent diffusion coefficient (ADC) and T2 parameter maps with k‐means (KM) clustering was employed to distinguish…”
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Birth of the Topological Atlas and Repository for Acupoint Research by Napadow, Vitaly, Harris, Richard E, Helmer, Karl G

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MarkVCID cerebral small vessel consortium: II. Neuroimaging protocols by Lu, Hanzhang, Kashani, Amir H., Arfanakis, Konstantinos, Caprihan, Arvind, DeCarli, Charles, Gold, Brian T., Li, Yang, Maillard, Pauline, Satizabal, Claudia L., Stables, Lara, Wang, Danny J. J., Corriveau, Roderick A., Singh, Herpreet, Smith, Eric E., Fischl, Bruce, Kouwe, Andre, Schwab, Kristin, Helmer, Karl G., Greenberg, Steven M.

“…The MarkVCID consortium was formed under cooperative agreements with the National Institute of Neurologic Diseases and Stroke (NINDS) and National Institute on…”
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MarkVCID cerebral small vessel consortium: I. Enrollment, clinical, fluid protocols by Wilcock, Donna, Jicha, Gregory, Blacker, Deborah, Albert, Marilyn S., D'Orazio, Lina M., Elahi, Fanny M., Fornage, Myriam, Hinman, Jason D., Knoefel, Janice, Kramer, Joel, Kryscio, Richard J., Lamar, Melissa, Moghekar, Abhay, Prestopnik, Jillian, Ringman, John M., Rosenberg, Gary, Sagare, Abhay, Satizabal, Claudia L., Schneider, Julie, Seshadri, Sudha, Sur, Sandeepa, Tracy, Russell P., Yasar, Sevil, Williams, Victoria, Singh, Herpreet, Mazina, Lidiya, Helmer, Karl G., Corriveau, Roderick A., Schwab, Kristin, Kivisäkk, Pia, Greenberg, Steven M.

“…The concept of vascular contributions to cognitive impairment and dementia (VCID) derives from more than two decades of research indicating that (1) most older…”
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Regional white matter volume differences in nondemented aging and Alzheimer's disease by Salat, David H., Greve, Douglas N., Pacheco, Jennifer L., Quinn, Brian T., Helmer, Karl G., Buckner, Randy L., Fischl, Bruce

“…Accumulating evidence suggests that altered cerebral white matter (WM) influences normal aging, and further that WM degeneration may modulate the clinical…”
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Cross-Vendor Test-Retest Validation of Diffusion Tensor Image Analysis along the Perivascular Space (DTI-ALPS) for Evaluating Glymphatic System Function by Liu, Xiaodan, Barisano, Giuseppe, Shao, Xingfeng, Jann, Kay, Ringman, John M, Lu, Hanzhang, Arfanakis, Konstantinos, Caprihan, Arvind, DeCarli, Charles, Gold, Brian T, Maillard, Pauline, Satizabal, Claudia L, Fadaee, Elyas, Habes, Mohamad, Stables, Lara, Singh, Herpreet, Fischl, Bruce, Kouwe, Andre van der, Schwab, Kristin, Helmer, Karl G, Greenberg, Steven M, Wang, Danny J J

“…The diffusion tensor image analysis along the perivascular space (DTI-ALPS) method was proposed to evaluate glymphatic system (GS) function. However, few…”
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Cerebrovascular reactivity MRI as a biomarker for cerebral small vessel disease–related cognitive decline: Multi‐site validation in the MarkVCID Consortium by Liu, Peiying, Lin, Zixuan, Hazel, Kaisha, Pottanat, George, Xu, Cuimei, Jiang, Dengrong, Pillai, Jay J., Lucke, Emma, Bauer, Christopher E., Gold, Brian T., Greenberg, Steven M., Helmer, Karl G., Jann, Kay, Jicha, Gregory, Kramer, Joel, Maillard, Pauline, Mulavelil, Rachel M., Rodriguez, Pavel, Satizabal, Claudia L., Schwab, Kristin, Seshadri, Sudha, Singh, Herpreet, Velarde Dediós, Ángel G., Wang, Danny J. J., Kalyani, Rita R., Moghekar, Abhay, Rosenberg, Paul B., Yasar, Sevil, Albert, Marilyn, Lu, Hanzhang

“…INTRODUCTION Vascular contributions to cognitive impairment and dementia (VCID) represent a major factor in cognitive decline in older adults. The present…”
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Multi-Site Cross-Site Inter-Rater and Test-Retest Reliability and Construct Validity of the MarkVCID White Matter Hyperintensity Growth and Regression Protocol by Bahrani, Ahmed A, Abner, Erin L, DeCarli, Charles S, Barber, Justin M, Sutton, Abigail C, Maillard, Pauline, Sandoval, Francisco, Arfanakis, Konstantinos, Yang, Yung-Chuan, Evia, Arnold M, Schneider, Julie A, Habes, Mohamad, Franklin, Crystal G, Seshadri, Sudha, Satizabal, Claudia L, Caprihan, Arvind, Thompson, Jeffrey F, Rosenberg, Gary A, Wang, Danny J J, Jann, Kay, Zhao, Chenyang, Lu, Hanzhang, Rosenberg, Paul B, Albert, Marilyn S, Ali, Doaa G, Singh, Herpreet, Schwab, Kristin, Greenberg, Steven M, Helmer, Karl G, Powel, David K, Gold, Brian T, Goldstein, Larry B, Wilcock, Donna M, Jicha, Gregory A

“…White matter hyperintensities (WMH) that occur in the setting of vascular cognitive impairment and dementia (VCID) may be dynamic increasing or decreasing…”
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Sharing brain mapping statistical results with the neuroimaging data model by Maumet, Camille, Auer, Tibor, Bowring, Alexander, Chen, Gang, Das, Samir, Flandin, Guillaume, Ghosh, Satrajit, Glatard, Tristan, Gorgolewski, Krzysztof J., Helmer, Karl G., Jenkinson, Mark, Keator, David B., Nichols, B. Nolan, Poline, Jean-Baptiste, Reynolds, Richard, Sochat, Vanessa, Turner, Jessica, Nichols, Thomas E.

“…Only a tiny fraction of the data and metadata produced by an fMRI study is finally conveyed to the community. This lack of transparency not only hinders the…”
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Enabling collaborative research using the Biomedical Informatics Research Network (BIRN) by Helmer, Karl G, Ambite, Jose Luis, Ames, Joseph, Ananthakrishnan, Rachana, Burns, Gully, Chervenak, Ann L, Foster, Ian, Liming, Lee, Keator, David, Macciardi, Fabio, Madduri, Ravi, Navarro, John-Paul, Potkin, Steven, Rosen, Bruce, Ruffins, Seth, Schuler, Robert, Turner, Jessica A, Toga, Arthur, Williams, Christina, Kesselman, Carl

“…As biomedical technology becomes increasingly sophisticated, researchers can probe ever more subtle effects with the added requirement that the investigation…”
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