Ivan Koychev

4.8k total citations · 1 hit paper
83 papers, 1.1k citations indexed

About

Ivan Koychev is a scholar working on Psychiatry and Mental health, Physiology and Cognitive Neuroscience. According to data from OpenAlex, Ivan Koychev has authored 83 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Psychiatry and Mental health, 23 papers in Physiology and 20 papers in Cognitive Neuroscience. Recurrent topics in Ivan Koychev's work include Dementia and Cognitive Impairment Research (36 papers), Alzheimer's disease research and treatments (17 papers) and Functional Brain Connectivity Studies (15 papers). Ivan Koychev is often cited by papers focused on Dementia and Cognitive Impairment Research (36 papers), Alzheimer's disease research and treatments (17 papers) and Functional Brain Connectivity Studies (15 papers). Ivan Koychev collaborates with scholars based in United Kingdom, United States and Ireland. Ivan Koychev's co-authors include J.F.W. Deakin, Wael El‐Deredy, Corinna Haenschel, David Okai, Philip McGuire, John D. Salamone, Mercè Correa, Chris Hinds, Claire Lancaster and Giovanna Zamboni and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and PLoS ONE.

In The Last Decade

Ivan Koychev

76 papers receiving 1.1k citations

Hit Papers

An analysis on the role of glucagon-like peptide-1 recept... 2025 2026 2025 5 10 15
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.

  1. An analysis on the role of glucagon-like peptide-1 receptor agonists in cognitive and mental health disorders
    2025 17 citations Riccardo De Giorgi, Maxime Taquet et al. Nature Mental Health profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ivan Koychev United Kingdom 21 439 323 257 148 144 83 1.1k
Katharina Wittfeld Germany 20 249 0.6× 359 1.1× 289 1.1× 128 0.9× 111 0.8× 53 1.3k
Meihong Xiu China 18 509 1.2× 256 0.8× 141 0.5× 113 0.8× 111 0.8× 110 1.1k
Young‐Min Park South Korea 21 302 0.7× 309 1.0× 196 0.8× 118 0.8× 133 0.9× 102 1.3k
Davide Bruno United Kingdom 18 444 1.0× 397 1.2× 246 1.0× 119 0.8× 163 1.1× 85 1.4k
Petr Bob Czechia 19 481 1.1× 445 1.4× 150 0.6× 152 1.0× 200 1.4× 102 1.9k
Dawn Mechanic‐Hamilton United States 17 330 0.8× 279 0.9× 267 1.0× 117 0.8× 47 0.3× 40 1.1k
Silke Matura Germany 21 419 1.0× 447 1.4× 339 1.3× 67 0.5× 137 1.0× 58 1.2k
Linda Mah Canada 18 440 1.0× 496 1.5× 170 0.7× 134 0.9× 161 1.1× 69 1.2k
Tristram A. Lett Germany 17 373 0.8× 406 1.3× 169 0.7× 158 1.1× 67 0.5× 28 1.2k
Amedeo Minichino Italy 23 515 1.2× 321 1.0× 180 0.7× 105 0.7× 109 0.8× 67 1.3k

Countries citing papers authored by Ivan Koychev

Since Specialization
Citations

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

Fields of papers citing papers by Ivan Koychev

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ivan Koychev

This figure shows the co-authorship network connecting the top 25 collaborators of Ivan Koychev. A scholar is included among the top collaborators of Ivan Koychev 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 Ivan Koychev. Ivan Koychev is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Reid, Graham, et al.. (2025). A systematic review of in vivo brain insulin resistance biomarkers in humans. 12. 100125–100125. 1 indexed citations
2.
Rowe, James B., Tanja Zerenner, Alistair Church, et al.. (2025). Cognitive and neuropsychiatric profiles distinguish atypical parkinsonian syndromes. Brain. 148(9). 3239–3251.
3.
Giorgi, Riccardo De, Maxime Taquet, Amanda Adler, et al.. (2025). An analysis on the role of glucagon-like peptide-1 receptor agonists in cognitive and mental health disorders. Nature Mental Health. 3(3). 354–373. 17 indexed citations breakdown →
4.
Irving, J. C. E., et al.. (2024). Assessing a Digital Lifestyle Intervention to Reduce Dementia Risk in Older Adults. Alzheimer s & Dementia. 20(S10).
5.
Qi, Qing, Karen Ritchie, Graciela Muñiz‐Terrera, et al.. (2024). Associations between sex and lifestyle activities with cognitive reserve in mid-life adults with genetic risk for Alzheimer’s disease. Alzheimer s Research & Therapy. 16(1). 246–246.
6.
Rua, Catarina, Richard N. Henson, Neil Burgess, et al.. (2024). Entorhinal‐based path integration selectively predicts midlife risk of Alzheimer's disease. Alzheimer s & Dementia. 20(4). 2779–2793. 12 indexed citations
7.
Reid, Graham, et al.. (2024). The usability and reliability of a smartphone application for monitoring future dementia risk in ageing UK adults. The British Journal of Psychiatry. 224(6). 245–251. 2 indexed citations
8.
Dounavi, Maria‐Eleni, Sarah Gregory, Graciela Muñiz‐Terrera, et al.. (2024). Investigating the brain’s neurochemical profile at midlife in relation to dementia risk factors. Brain Communications. 6(3). fcae138–fcae138. 2 indexed citations
9.
Stefaniak, James D., Elijah Mak, Li Su, et al.. (2024). Brain age gap, dementia risk factors and cognition in middle age. Brain Communications. 6(6). fcae392–fcae392. 3 indexed citations
10.
Dounavi, Maria‐Eleni, Paresh Malhotra, Brian Lawlor, et al.. (2024). Dementia risk and thalamic nuclei volumetry in healthy midlife adults: the PREVENT Dementia study. Brain Communications. 6(2). fcae046–fcae046. 5 indexed citations
11.
Giorgi, Riccardo De, Ivan Koychev, Amanda Adler, et al.. (2024). 12-month neurological and psychiatric outcomes of semaglutide use for type 2 diabetes: a propensity-score matched cohort study. EClinicalMedicine. 74. 102726–102726. 35 indexed citations
12.
13.
Dounavi, Maria‐Eleni, Elijah Mak, Peter Swann, et al.. (2023). Differential association of cerebral blood flow and anisocytosis in APOE ε4 carriers at midlife. Journal of Cerebral Blood Flow & Metabolism. 43(10). 1672–1684. 7 indexed citations
14.
Egerton, Alice, Joel Dunn, Nisha Singh, et al.. (2020). Evaluation of [13N]ammonia positron emission tomography as a potential method for quantifying glutamine synthetase activity in the human brain. EJNMMI Research. 10(1). 146–146. 3 indexed citations
15.
Koychev, Ivan, et al.. (2020). Dementias Platform UK Clinical Studies and Great Minds Register: protocol of a targeted brain health studies recontact database. BMJ Open. 10(11). e040766–e040766. 8 indexed citations
16.
Koychev, Ivan, Nemanja Vaci, Murat Bilgel, et al.. (2020). Prediction of rapid amyloid and phosphorylated‐Tau accumulation in cognitively healthy individuals. Alzheimer s & Dementia Diagnosis Assessment & Disease Monitoring. 12(1). e12019–e12019. 14 indexed citations
17.
18.
Koychev, Ivan, Roger N. Gunn, John T. Lawson, et al.. (2018). PET Tau and Amyloid-beta Burden in Mild Alzheimer's Disease: Divergent Relationship with Age, Cognition, and Cerebrospinal Fluid Biomarkers (vol 60, pg 283, 2017). 63. 407–407. 1 indexed citations
19.
Moulton, Calum D. & Ivan Koychev. (2014). The effect of penicillin therapy on cognitive outcomes in neurosyphilis: a systematic review of the literature. General Hospital Psychiatry. 37(1). 49–52. 10 indexed citations
20.
Schmechtig, Anne, Jane Lees, Adam M. Perkins, et al.. (2013). The effects of ketamine and risperidone on eye movement control in healthy volunteers. Translational Psychiatry. 3(12). e334–e334. 19 indexed citations

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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