William A. Copen

4.8k total citations · 1 hit paper
53 papers, 3.5k citations indexed

About

William A. Copen is a scholar working on Epidemiology, Radiology, Nuclear Medicine and Imaging and Neurology. According to data from OpenAlex, William A. Copen has authored 53 papers receiving a total of 3.5k indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Epidemiology, 27 papers in Radiology, Nuclear Medicine and Imaging and 25 papers in Neurology. Recurrent topics in William A. Copen's work include Acute Ischemic Stroke Management (24 papers), Advanced Neuroimaging Techniques and Applications (19 papers) and Traumatic Brain Injury and Neurovascular Disturbances (17 papers). William A. Copen is often cited by papers focused on Acute Ischemic Stroke Management (24 papers), Advanced Neuroimaging Techniques and Applications (19 papers) and Traumatic Brain Injury and Neurovascular Disturbances (17 papers). William A. Copen collaborates with scholars based in United States, United Kingdom and France. William A. Copen's co-authors include A. Gregory Sorensen, Lee H. Schwamm, Walter J. Koroshetz, Pamela W. Schaefer, Ona Wu, Ramón González, Robert M. Weisskoff, Guy Rordorf, Ferdinando S. Buonanno and Bruce R. Rosen and has published in prestigious journals such as New England Journal of Medicine, PLoS ONE and Stroke.

In The Last Decade

William A. Copen

51 papers receiving 3.4k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Hyperacute stroke: evaluation with combined multisection diffusion-weighted and hemodynamically weighted echo-planar MR imaging.

1996 592 citations A. Gregory Sorensen, F S Buonanno et al. Radiology profile →

Peers

Countries citing papers authored by William A. Copen

Since Specialization

Citations

This map shows the geographic impact of William A. Copen's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by William A. Copen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites William A. Copen more than expected).

Fields of papers citing papers by William A. Copen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by William A. Copen. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by William A. Copen. The network helps show where William A. Copen may publish in the future.

Co-authorship network of co-authors of William A. Copen

This figure shows the co-authorship network connecting the top 25 collaborators of William A. Copen. A scholar is included among the top collaborators of William A. Copen based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with William A. Copen. William A. Copen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Severe cerebral edema in substance-related cardiac arrest patients 2022 ·Resuscitation ·(unknown), William A. Copen, Brandon L. Hancock, Eric S. Rosenthal, David Schoenfeld, (unknown), Brian L. Edlow, W. Taylor Kimberly, Edilberto Amorim, M. Brandon Westover, (unknown), Pamela W. Schaefer, Rajeev Malhotra, Joseph T. Giacino, David M. Greer, Ona Wu	3
2	Ensemble of Convolutional Neural Networks Improves Automated Segmentation of Acute Ischemic Lesions Using Multiparametric Diffusion-Weighted MRI 2019 ·American Journal of Neuroradiology ·Stefan Winzeck, Steven J. T. Mocking, (unknown), Mark J.R.J. Bouts, Elissa C. McIntosh, (unknown), (unknown), Aurauma Chutinet, W. Taylor Kimberly, William A. Copen, Pamela W. Schaefer, Hakan Ay, Aneesh B. Singhal, Konstantinos Kamnitsas, Ben Glocker, A. Gregory Sorensen, Ona Wu	38
3	In patients with suspected acute stroke, CT perfusion-based cerebral blood flow maps cannot substitute for DWI in measuring the ischemic core 2017 ·PLoS ONE ·William A. Copen, Albert J. Yoo, Natalia S. Rost, (unknown), Pamela W. Schaefer, Ramón González, Ona Wu	42
4	Case 13-2017 2017 ·New England Journal of Medicine ·Haatem Reda, William A. Copen, Amel Karaa, Derek H. Oakley	1
5	Diffuse microvascular dysfunction and loss of white matter integrity predict poor outcomes in patients with acute ischemic stroke 2017 ·Journal of Cerebral Blood Flow & Metabolism ·Natalia S. Rost, Pedro Cougo, Svetlana Lorenzano, Hua Li, Lisa Cloonan, Mark J.R.J. Bouts, Arne Lauer, Mark R. Etherton, (unknown), Patricia L. Musolino, William A. Copen, Ken Arai, Eng H. Lo, (unknown), Karen L. Furie, Ona Wu	57
6	Diffusion tensor imaging in acute-to-subacute traumatic brain injury: a longitudinal analysis 2016 ·BMC Neurology ·Brian L. Edlow, William A. Copen, Saef Izzy, Khamid Bakhadirov, André van der Kouwe, Mel B. Glenn, Steven M. Greenberg, David M. Greer, Ona Wu	56
7	Multimodal Imaging in Acute Ischemic Stroke 2015 ·Current Treatment Options in Cardiovascular Medicine ·William A. Copen	5
8	Longitudinal Diffusion Tensor Imaging Detects Recovery of Fractional Anisotropy Within Traumatic Axonal Injury Lesions 2015 ·Neurocritical Care ·Brian L. Edlow, William A. Copen, Saef Izzy, André van der Kouwe, Mel B. Glenn, Steven M. Greenberg, David M. Greer, Ona Wu	13
9	Exposing Hidden Truncation-Related Errors in Acute Stroke Perfusion Imaging 2014 ·American Journal of Neuroradiology ·William A. Copen, Amy R. Deipolyi, Pamela W. Schaefer, Lee H. Schwamm, Ramón González, Ona Wu	28
10	MR Perfusion Imaging in Acute Ischemic Stroke 2011 ·Neuroimaging Clinics of North America ·William A. Copen, Pamela W. Schaefer, Ona Wu	101
11	Cerebral Blood Flow Thresholds for Tissue Infarction in Patients with Acute Ischemic Stroke Treated with Intra-Arterial Revascularization Therapy Depend on Timing of Reperfusion 2011 ·American Journal of Neuroradiology ·(unknown), Albert J. Yoo, Luis A. Verduzco, William A. Copen, Joshua A Hirsch, R. Gilberto González, Pamela W. Schaefer	16
12	Outcome in Patients with H1N1 Influenza and Cerebrovascular Injury Treated with Extracorporeal Membrane Oxygenation 2011 ·Neurocritical Care ·Felicia C. Chow, Brian L. Edlow, Matthew P. Frosch, William A. Copen, David M. Greer	33
13	Time-resolved contrast-enhanced magnetic resonance angiography in the investigation of suspected intracranial dural arteriovenous fistula 2011 ·Journal of Clinical Neuroscience ·(unknown), Brian P. Walcott, Brian V. Nahed, Christopher S. Ogilvy, (unknown), James D. Rabinov, William A. Copen	7
14	Case 12-2009 2009 ·New England Journal of Medicine ·Steven D. Brass, Eric E. Smith, Joseph F. Arboleda‐Velásquez, William A. Copen, Matthew P. Frosch	23
15	Existence of the Diffusion-Perfusion Mismatch within 24 Hours after Onset of Acute Stroke: Dependence on Proximal Arterial Occlusion 2009 ·Radiology ·William A. Copen, Leila Rezai Gharai, (unknown), Lee H. Schwamm, Ona Wu, Shahmir Kamalian, Ramón González, Pamela W. Schaefer	72
16	Case 38-2009 2009 ·New England Journal of Medicine ·Steven D. Brass, Marc Dinkin, Ziv M. Williams, Kalpathy S. Krishnamoorthy, William A. Copen, Stefanie H. Freeman	0
17	Ischemic Stroke: Effects of Etiology and Patient Age on the Time Course of the Core Apparent Diffusion Coefficient 2001 ·Radiology ·William A. Copen, Lee H. Schwamm, Ramón González, Ona Wu, Carla Harmath, Pamela W. Schaefer, Walter J. Koroshetz, A. Gregory Sorensen	79
18	Heterogeneous spatial-temporal evolution of DWI/PWI in human cerebral ischemia 2000 ·Stroke ·Ona Wu, Lee H. Schwamm, Walter J. Koroshetz, (unknown), (unknown), Thomas Benner, William A. Copen, Leif Østergaard, A. Gregory Sorensen	1
19	Hyperacute Stroke: Simultaneous Measurement of Relative Cerebral Blood Volume, Relative Cerebral Blood Flow, and Mean Tissue Transit Time 1999 ·Radiology ·A. Gregory Sorensen, William A. Copen, Leif Østergaard, Ferdinando S. Buonanno, Ramón González, Guy Rordorf, Bruce R. Rosen, Lee H. Schwamm, Robert M. Weisskoff, Walter J. Koroshetz	317
20	Hyperacute stroke: evaluation with combined multisection diffusion-weighted and hemodynamically weighted echo-planar MR imaging. breakdown → 1996 ·Radiology ·A. Gregory Sorensen, F S Buonanno, R. Gilberto González, Lee H. Schwamm, Michael H. Lev, Frank Huang‐Hellinger, Timothy G. Reese, Robert M. Weisskoff, Timothy L. Davis, Nijasri C. Suwanwela, Ufuk Can, José Moreira, William A. Copen, (unknown), Seth P. Finklestein, Bruce R. Rosen, Walter J. Koroshetz	592

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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