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, Robert M. Weisskoff, Ramón González, 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 sort by overperformance

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 →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
William A. Copen	1.9k	1.8k	1.2k	1.0k	356	53	3.5k
Thomas Kucinski	2.7k 1.4×	1.2k 0.6×	1.7k 1.4×	1.6k 1.6×	548 1.5×	74	4.3k
Jean-François Méder	1.9k 1.0×	1.2k 0.7×	2.0k 1.8×	2.5k 2.4×	266 0.7×	153	5.4k
Robert J. Sevick	1.1k 0.6×	972 0.5×	875 0.8×	853 0.8×	163 0.5×	57	2.6k
Marwan El‐Koussy	2.1k 1.1×	437 0.2×	1.6k 1.3×	1.3k 1.3×	536 1.5×	114	3.7k
Jean‐Marc Olivot	3.9k 2.1×	925 0.5×	2.4k 2.1×	1.8k 1.8×	844 2.4×	148	5.1k
Oliver C. Singer	1.3k 0.7×	517 0.3×	698 0.6×	864 0.9×	274 0.8×	37	2.2k
Lauri Soinne	2.5k 1.4×	532 0.3×	1.3k 1.2×	1.2k 1.2×	844 2.4×	74	3.9k
Claus Z. Simonsen	1.7k 0.9×	451 0.2×	868 0.7×	965 1.0×	498 1.4×	123	2.5k
Stephanie Kemp	4.4k 2.4×	997 0.5×	2.6k 2.2×	2.0k 2.0×	1.1k 3.1×	84	4.9k
X. Leclerc	1.2k 0.6×	814 0.4×	2.0k 1.7×	2.9k 2.9×	94 0.3×	224	4.8k

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

Copen, William A., Brandon L. Hancock, Eric S. Rosenthal, et al.. (2022). Severe cerebral edema in substance-related cardiac arrest patients. Resuscitation. 173. 103–111. 3 indexed citations

Winzeck, Stefan, Steven J. T. Mocking, Mark J.R.J. Bouts, et al.. (2019). Ensemble of Convolutional Neural Networks Improves Automated Segmentation of Acute Ischemic Lesions Using Multiparametric Diffusion-Weighted MRI. American Journal of Neuroradiology. 40(6). 938–945. 38 indexed citations

Etherton, Mark R., Ona Wu, Anne‐Katrin Giese, et al.. (2019). White Matter Integrity and Early Outcomes After Acute Ischemic Stroke. Translational Stroke Research. 10(6). 630–638. 40 indexed citations

Copen, William A., Albert J. Yoo, Natalia S. Rost, et al.. (2017). In patients with suspected acute stroke, CT perfusion-based cerebral blood flow maps cannot substitute for DWI in measuring the ischemic core. PLoS ONE. 12(11). e0188891–e0188891. 42 indexed citations

Reda, Haatem, William A. Copen, Amel Karaa, & Derek H. Oakley. (2017). Case 13-2017. New England Journal of Medicine. 376(17). 1668–1678. 1 indexed citations

Edlow, Brian L., William A. Copen, Saef Izzy, et al.. (2016). Diffusion tensor imaging in acute-to-subacute traumatic brain injury: a longitudinal analysis. BMC Neurology. 16(1). 2–2. 56 indexed citations

Copen, William A., Michael H. Lev, & Otto Rapalino. (2016). Brain perfusion. Handbook of clinical neurology. 135. 117–135. 21 indexed citations

Copen, William A., et al.. (2015). Comparing prognostic strength of acute corticospinal tract injury measured by a new diffusion tensor imaging based template approach versus common approaches. Journal of Neuroscience Methods. 257. 204–213. 6 indexed citations

Mehan, William A., Ramón González, Bradley R. Buchbinder, et al.. (2014). Optimal Brain MRI Protocol for New Neurological Complaint. PLoS ONE. 9(10). e110803–e110803. 15 indexed citations

10.

Copen, William A., Amy R. Deipolyi, Pamela W. Schaefer, et al.. (2014). Exposing Hidden Truncation-Related Errors in Acute Stroke Perfusion Imaging. American Journal of Neuroradiology. 36(4). 638–645. 28 indexed citations

11.

Walcott, Brian P., et al.. (2011). Time-resolved contrast-enhanced magnetic resonance angiography in the investigation of suspected intracranial dural arteriovenous fistula. Journal of Clinical Neuroscience. 18(6). 837–839. 7 indexed citations

12.

Yoo, Albert J., Luis A. Verduzco, William A. Copen, et al.. (2011). Cerebral Blood Flow Thresholds for Tissue Infarction in Patients with Acute Ischemic Stroke Treated with Intra-Arterial Revascularization Therapy Depend on Timing of Reperfusion. American Journal of Neuroradiology. 32(5). 846–851. 16 indexed citations

13.

Copen, William A., Pamela W. Schaefer, & Ona Wu. (2011). MR Perfusion Imaging in Acute Ischemic Stroke. Neuroimaging Clinics of North America. 21(2). 259–283. 101 indexed citations

14.

Sun, Phillip Zhe, Thomas Benner, William A. Copen, & A. Gregory Sorensen. (2010). Early Experience of Translating pH-Weighted MRI to Image Human Subjects at 3 Tesla. Stroke. 41(10_suppl_1). S147–51. 70 indexed citations

15.

Pless, Misha, Yi‐Bin Chen, William A. Copen, & Matthew P. Frosch. (2010). Case 9-2010. New England Journal of Medicine. 362(12). 1129–1138. 7 indexed citations

16.

Brass, Steven D., Eric E. Smith, Joseph F. Arboleda‐Velásquez, William A. Copen, & Matthew P. Frosch. (2009). Case 12-2009. New England Journal of Medicine. 360(16). 1656–1665. 23 indexed citations

17.

Copen, William A., Lee H. Schwamm, Ramón González, et al.. (2001). Ischemic Stroke: Effects of Etiology and Patient Age on the Time Course of the Core Apparent Diffusion Coefficient. Radiology. 221(1). 27–34. 79 indexed citations

18.

Wu, Ona, Lee H. Schwamm, Walter J. Koroshetz, et al.. (2000). Heterogeneous spatial-temporal evolution of DWI/PWI in human cerebral ischemia. Stroke. 32. 348–348. 1 indexed citations

19.

Sorensen, A. Gregory, Ona Wu, William A. Copen, et al.. (1999). Human Acute Cerebral Ischemia: Detection of Changes in Water Diffusion Anisotropy by Using MR Imaging. Radiology. 212(3). 785–792. 255 indexed citations

20.

Sorensen, A. Gregory, F S Buonanno, R. Gilberto González, et al.. (1996). Hyperacute stroke: evaluation with combined multisection diffusion-weighted and hemodynamically weighted echo-planar MR imaging.. Radiology. 199(2). 391–401. 592 indexed citations breakdown →

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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