Jim Ropchan

5.1k total citations · 1 hit paper
136 papers, 3.4k citations indexed

About

Jim Ropchan is a scholar working on Cellular and Molecular Neuroscience, Molecular Biology and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Jim Ropchan has authored 136 papers receiving a total of 3.4k indexed citations (citations by other indexed papers that have themselves been cited), including 65 papers in Cellular and Molecular Neuroscience, 49 papers in Molecular Biology and 41 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Jim Ropchan's work include Neuroscience and Neuropharmacology Research (36 papers), Medical Imaging Techniques and Applications (34 papers) and Receptor Mechanisms and Signaling (24 papers). Jim Ropchan is often cited by papers focused on Neuroscience and Neuropharmacology Research (36 papers), Medical Imaging Techniques and Applications (34 papers) and Receptor Mechanisms and Signaling (24 papers). Jim Ropchan collaborates with scholars based in United States, China and Canada. Jim Ropchan's co-authors include Richard E. Carson, Yiyun Huang, Nabeel Nabulsi, Mika Naganawa, Shu-fei Lin, David Labaree, Soheila Najafzadeh, Shannan Henry, David Matuskey and Ming‐Qiang Zheng and has published in prestigious journals such as Journal of Neuroscience, NeuroImage and Clinical Infectious Diseases.

In The Last Decade

Jim Ropchan

132 papers receiving 3.4k citations

Hit Papers

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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.

Assessing Synaptic Density in Alzheimer Disease With Synaptic Vesicle Glycoprotein 2A Positron Emission Tomographic Imaging

2018 298 citations Ming-Kai Chen, Adam P. Mecca et al. profile →

Peers

Countries citing papers authored by Jim Ropchan

Since Specialization

Citations

This map shows the geographic impact of Jim Ropchan'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 Jim Ropchan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Jim Ropchan more than expected).

Fields of papers citing papers by Jim Ropchan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jim Ropchan. 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 Jim Ropchan. The network helps show where Jim Ropchan may publish in the future.

Co-authorship network of co-authors of Jim Ropchan

This figure shows the co-authorship network connecting the top 25 collaborators of Jim Ropchan. A scholar is included among the top collaborators of Jim Ropchan 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 Jim Ropchan. Jim Ropchan 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	PET Imaging of Sphingosine-1-Phosphate Receptor 1 with [18F]TZ4877 in Nonhuman Primates 2025 ·Molecular Imaging and Biology ·Jiwei Gu, Ming‐Qiang Zheng, Daniel Holden, Krista Fowles, Lin Qiu, (unknown), Li Zhang, Jim Ropchan, Robert J. Gropler, Richard E. Carson, Zhude Tu, Yiyun Huang, Ansel T. Hillmer	2
2	553. Preliminary Evidence for an Elevated Neuroinflammatory Signal in Opioid Use Disorder: Findings From a PET TSPO Imaging Study 2023 ·Biological Psychiatry ·Eric A. Woodcock, Gustavo A. Angarita, David Matuskey, Jim Ropchan, Nabeel Nabulsi, Yiyun Huang, Ansel T. Hillmer, Richard E. Carson, Robert T. Malison, Kelly Cosgrove	1
3	Systemic inflammation enhances stimulant-induced striatal dopamine elevation in tobacco smokers 2022 ·Brain Behavior and Immunity ·Yasmin Zakiniaeiz, (unknown), (unknown), (unknown), (unknown), Hong Gao, Soheila Najafzadeh, Jim Ropchan, Nabeel Nabulsi, Yiyun Huang, Ming-Kai Chen, David Matuskey, Daniel S. Barron, Benjamin Kelmendi, Robert K. Fulbright, Michelle Hampson, Kelly Cosgrove, Evan D. Morris	3
4	Evaluation of (rac)-, (R)-, and (S)-¹⁸F-OF-NB1 for Imaging GluN2B Subunit–ContainingN-Methyl-d-Aspartate Receptors in Nonhuman Primates 2022 ·Journal of Nuclear Medicine ·(unknown), Ming‐Qiang Zheng, Kelly Smart, Hanyi Fang, Li Zhang, Paul Emery, Hong Gao, Jim Ropchan, Ahmed Haider, Gilles Tamagnan, Richard E. Carson, Simon M. Ametamey, Yiyun Huang	8
5	Translational PET Imaging of Spinal Cord Injury with the Serotonin Transporter Tracer [11C]AFM 2022 ·Molecular Imaging and Biology ·Hanyi Fang, (unknown), Xingxing Wang, Nabeel Nabulsi, Brian J. Kelley, Krista Fowles, Jim Ropchan, Stephen M. Strittmatter, Richard E. Carson, Yiyun Huang	3
6	Association of Aβ deposition and regional synaptic density in early Alzheimer’s disease: a PET imaging study with [11C]UCB-J 2021 ·Alzheimer s Research & Therapy ·Ryan S. O’Dell, Adam P. Mecca, Ming-Kai Chen, Mika Naganawa, Takuya Toyonaga, Yihuan Lu, Tyler A. Godek, Joanna E. Harris, Hugh H. Bartlett, Emmie Banks, (unknown), Wenzhen Zhao, Nabeel Nabulsi, Jim Ropchan, Yunpeng Ye, Brent C. Vander Wyk, Yiyun Huang, Amy F.T. Arnsten, Richard E. Carson, Christopher H. van Dyck	72
7	Tobacco Smoking in People Is Not Associated with Altered 18-kDa Translocator Protein Levels: A PET Study 2020 ·Journal of Nuclear Medicine ·Ansel T. Hillmer, David Matuskey, Yiyun Huang, Nabeel Nabulsi, Jim Ropchan, Richard E. Carson, Stephanie S. O’Malley, Kelly Cosgrove	10
8	First-in-Human Assessment of ¹¹C-LSN3172176, an M1 Muscarinic Acetylcholine Receptor PET Radiotracer 2020 ·Journal of Nuclear Medicine ·Mika Naganawa, Nabeel Nabulsi, Shannan Henry, David Matuskey, Shu-fei Lin, Lawrence J. Slieker, Adam J. Schwarz, (unknown), Cynthia D. Jesudason, (unknown), Antonio Navarro, Hong Gao, Jim Ropchan, David Labaree, Richard E. Carson, Yiyun Huang	46
9	Social status and demographic effects of the kappa opioid receptor: a PET imaging study with a novel agonist radiotracer in healthy volunteers 2019 ·Neuropsychopharmacology ·David Matuskey, Mark Dias, Mika Naganawa, Brian Pittman, Shannan Henry, Songye Li, Hong Gao, Jim Ropchan, Nabeel Nabulsi, Richard E. Carson, Yiyun Huang	26
10	Imaging the Enzyme 11β-Hydroxysteroid Dehydrogenase Type 1 with PET: Evaluation of the Novel Radiotracer¹¹C-AS2471907 in Human Brain 2019 ·Journal of Nuclear Medicine ·Jean‐Dominique Gallezot, Nabeel Nabulsi, Shannan Henry, Richard Pracitto, Beata Planeta, Jim Ropchan, Shu-fei Lin, David Labaree, Michael Kapinos, (unknown), Teresa Lara‐Jaime, Hong Gao, David Matuskey, Mark Walzer, Gerard J. Marek, (unknown), (unknown), Richard E. Carson, Yiyun Huang	13
11	Cortical β-amyloid burden, gray matter, and memory in adults at varying APOE ε4 risk for Alzheimer's disease 2017 ·Neurobiology of Aging ·Adam P. Mecca, Nicole Barcelos, Shuo Wang, Anna Brück, Nabeel Nabulsi, Beata Planeta‐Wilson, (unknown), Amanda L. Benincasa, Jim Ropchan, Yiyun Huang, Joel Gelernter, Peter H. Van Ness, Richard E. Carson, Christopher H. van Dyck	27
12	Dopamine D ₃ Receptor Availability Is Associated with Inflexible Decision Making 2016 ·Journal of Neuroscience ·Stephanie M. Groman, Nathaniel J. Smith, (unknown), (unknown), Lihui Chen, Jim Ropchan, Yiyun Huang, Daeyeol Lee, Evan D. Morris, Jane R. Taylor	28
13	A preliminary study of dopamine D2/3 receptor availability and social status in healthy and cocaine dependent humans imaged with [11C](+)PHNO 2015 ·Drug and Alcohol Dependence ·David Matuskey, Edward Gaiser, Jean‐Dominique Gallezot, Gustavo A. Angarita, Brian Pittman, Nabeel Nabulsi, Jim Ropchan, (unknown), Kelly Cosgrove, Yu‐Shin Ding, Marc N. Potenza, Richard E. Carson, Robert T. Malison	25
14	Synthesis of [ 18 F]FMISO in a flow-through microfluidic reactor: Development and clinical application 2015 ·Nuclear Medicine and Biology ·Ming‐Qiang Zheng, (unknown), Frédéric Y. Bois, (unknown), (unknown), Jim Ropchan, Murthy R. Akula, David J. Carlson, George W. Kabalka, Yiyun Huang	19
15	Determination of the In Vivo Selectivity of a New κ-Opioid Receptor Antagonist PET Tracer ¹¹C-LY2795050 in the Rhesus Monkey 2013 ·Journal of Nuclear Medicine ·Su Jin Kim, Ming‐Qiang Zheng, Nabeel Nabulsi, David Labaree, Jim Ropchan, Soheila Najafzadeh, Richard E. Carson, Yiyun Huang, Evan D. Morris	30
16	Determination of In Vivo B_max and K_d for ¹¹C-GR103545, an Agonist PET Tracer for κ-Opioid Receptors: A Study in Nonhuman Primates 2013 ·Journal of Nuclear Medicine ·Giampaolo Tomasi, Nabeel Nabulsi, Ming‐Qiang Zheng, David Weinzimmer, Jim Ropchan, (unknown), (unknown), Yu‐Shin Ding, Richard E. Carson, Yiyun Huang	29
17	Elevated brain cannabinoid CB1 receptor availability in post-traumatic stress disorder: a positron emission tomography study 2013 ·Molecular Psychiatry ·(unknown), Marc D. Normandin, Robert H. Pietrzak, Daniele Piomelli, M. Zheng, (unknown), Marc N. Potenza, (unknown), Suxia Lin, Soheila Najafzadeh, Jim Ropchan, S. Henry, Stefani Corsi-Travali, Richard E. Carson, Yiyun Huang	261
18	Serotonin 1B receptor imaging in pathological gambling 2011 ·The World Journal of Biological Psychiatry ·Marc N. Potenza, Espen Walderhaug, Shannan Henry, Jean‐Dominique Gallezot, Beata Planeta‐Wilson, Jim Ropchan, Alexander Neumeister	39
19	[11C]GR103545: novel one-pot radiosynthesis with high specific activity 2010 ·Nuclear Medicine and Biology ·Nabeel Nabulsi, Ming‐Qiang Zheng, Jim Ropchan, David Labaree, Yu‐Shin Ding, (unknown), Yiyun Huang	24
20	High-resolution imaging of brain 5-HT1B receptors in the rhesus monkey using [11C]P943 2009 ·Nuclear Medicine and Biology ·Nabeel Nabulsi, Yiyun Huang, David Weinzimmer, Jim Ropchan, J. James Frost, Timothy J. McCarthy, Richard E. Carson, Yu‐Shin Ding	33

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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