Geir Bertelsen

3.3k total citations
30 papers, 562 citations indexed

About

Geir Bertelsen is a scholar working on Radiology, Nuclear Medicine and Imaging, Ophthalmology and Cardiology and Cardiovascular Medicine. According to data from OpenAlex, Geir Bertelsen has authored 30 papers receiving a total of 562 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Radiology, Nuclear Medicine and Imaging, 20 papers in Ophthalmology and 4 papers in Cardiology and Cardiovascular Medicine. Recurrent topics in Geir Bertelsen's work include Retinal Imaging and Analysis (18 papers), Retinal Diseases and Treatments (14 papers) and Glaucoma and retinal disorders (12 papers). Geir Bertelsen is often cited by papers focused on Retinal Imaging and Analysis (18 papers), Retinal Diseases and Treatments (14 papers) and Glaucoma and retinal disorders (12 papers). Geir Bertelsen collaborates with scholars based in Norway, Denmark and United Kingdom. Geir Bertelsen's co-authors include Inger Njølstad, Therese von Hanno, Tünde Pető, Anne Katrin Sjølie, Ellisiv B. Mathiesen, Haakon Lindekleiv, Maja Gran Erke, Henrik Schirmer, Catherine Helmer and Cécile Delcourt and has published in prestigious journals such as PLoS ONE, Kidney International and Ophthalmology.

In The Last Decade

Geir Bertelsen

28 papers receiving 554 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Geir Bertelsen Norway 13 358 317 64 60 56 30 562
Gyulli M. Kazakbaeva Germany 14 284 0.8× 227 0.7× 11 0.2× 175 2.9× 29 0.5× 60 522
Therese von Hanno Norway 9 162 0.5× 155 0.5× 50 0.8× 32 0.5× 43 0.8× 16 335
Artur F. Zaynetdinov Germany 11 181 0.5× 135 0.4× 4 0.1× 99 1.6× 23 0.4× 21 329
Heike M. Elflein Germany 17 404 1.1× 487 1.5× 8 0.1× 256 4.3× 11 0.2× 47 880
Eda Derle Türkiye 9 83 0.2× 67 0.2× 3 0.0× 13 0.2× 19 0.3× 28 340
Se Woong Kang South Korea 13 576 1.6× 358 1.1× 7 0.1× 182 3.0× 17 0.3× 24 763
Nathan H. Kung United States 7 197 0.6× 152 0.5× 2 0.0× 36 0.6× 16 0.3× 13 496
Giancarlo Sborgia Italy 12 197 0.6× 177 0.6× 2 0.0× 42 0.7× 8 0.1× 56 386
Hajime Ishiguro Japan 11 25 0.1× 26 0.1× 8 0.1× 38 0.6× 44 0.8× 33 301
Dorothy G. Cooper United States 11 368 1.0× 139 0.4× 2 0.0× 46 0.8× 32 0.6× 15 696

Countries citing papers authored by Geir Bertelsen

Since Specialization
Citations

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

Fields of papers citing papers by Geir Bertelsen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Geir Bertelsen

This figure shows the co-authorship network connecting the top 25 collaborators of Geir Bertelsen. A scholar is included among the top collaborators of Geir Bertelsen 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 Geir Bertelsen. Geir Bertelsen 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.
Hanno, Therese von, et al.. (2025). The Retinal Vasculature and Risk of Age-Related GFR Decline — The Renal Iohexol Clearance Survey. Kidney International Reports. 10(5). 1384–1392.
2.
Nitter, Tore, et al.. (2024). Repeatability and agreement of total corneal astigmatism measured in keratoconic eyes using four current devices. Clinical and Experimental Ophthalmology. 52(8). 800–810. 1 indexed citations
3.
Reinstein, Dan Z., Tore Nitter, Timothy J. Archer, et al.. (2023). Epithelial Thickness Mapping in Keratoconic Corneas: Repeatability and Agreement Between CSO MS-39, Heidelberg Anterion, and Optovue Avanti OCT Devices. Journal of Refractive Surgery. 39(7). 474–480. 9 indexed citations
4.
Khawaja, Anthony P., Tos T. J. M. Berendschot, Thomas J. Littlejohns, et al.. (2023). Associations of inner retinal layers with risk of incident dementia: An individual participant data analysis of four prospective cohort studies. Alzheimer s & Dementia. 20(1). 211–220. 6 indexed citations
5.
Olsen, Karina Standahl, Kristian Fossen, Kirsten Gravningen, et al.. (2021). Clinical course, treatment and visual outcome of an outbreak of Burkholderia contaminans endophthalmitis following cataract surgery. Journal of Ophthalmic Inflammation and Infection. 11(1). 12–12. 6 indexed citations
6.
Rypdal, Veronika, Mia Glerup, Nils Thomas Songstad, et al.. (2020). Uveitis in Juvenile Idiopathic Arthritis. Ophthalmology. 128(4). 598–608. 39 indexed citations
7.
Schirmer, Henrik, Therese von Hanno, Ellisiv B. Mathiesen, et al.. (2018). Small and large vessel disease in persons with unrecognized compared to recognized myocardial infarction: The Tromsø Study 2007–2008. International Journal of Cardiology. 253. 14–19. 11 indexed citations
8.
Hanno, Therese von, Geir Bertelsen, Anne Katrin Sjølie, & Ellisiv B. Mathiesen. (2013). Retinal vascular calibres are significantly associated with cardiovascular risk factors: the Tromsø Eye Study. Acta Ophthalmologica. 92(1). 40–46. 37 indexed citations
9.
Bertelsen, Geir, Tünde Pető, Haakon Lindekleiv, et al.. (2013). Sex differences in risk factors for retinopathy in non‐diabetic men and women: The Tromsø Eye Study. Acta Ophthalmologica. 92(4). 316–322. 19 indexed citations
10.
Lindekleiv, Haakon, Maja Gran Erke, Geir Bertelsen, et al.. (2013). Cognitive function, drusen, and age-related macular degeneration: a cross-sectional study. Eye. 27(11). 1281–1287. 12 indexed citations
11.
Erke, Maja Gran, et al.. (2013). Lactation, female hormones and age-related macular degeneration: the Tromsø Study. British Journal of Ophthalmology. 97(8). 1036–1039. 11 indexed citations
12.
Eriksen, Björn O., Maja‐Lisa Løchen, Kjell Arne Arntzen, et al.. (2013). Subclinical cardiovascular disease is associated with a high glomerular filtration rate in the nondiabetic general population. Kidney International. 86(1). 146–153. 45 indexed citations
13.
Bertelsen, Geir, Maja Gran Erke, Therese von Hanno, et al.. (2012). The Tromsø Eye Study: study design, methodology and results on visual acuity and refractive errors. Acta Ophthalmologica. 91(7). 635–642. 30 indexed citations
14.
Erke, Maja Gran, Geir Bertelsen, Tünde Pető, et al.. (2012). Prevalence of Age-related Macular Degeneration in Elderly Caucasians: The Tromsø Eye Study. Ophthalmology. 119(9). 1737–1743. 46 indexed citations
15.
Xu, Xiayu, Joseph M. Reinhardt, Benjamin Bakall, et al.. (2012). Retinal Vessel Width Measurement at Branchings Using an Improved Electric Field Theory-Based Graph Approach. PLoS ONE. 7(11). e49668–e49668. 5 indexed citations
16.
Bertelsen, Geir, Tünde Pető, Haakon Lindekleiv, et al.. (2012). Tromsø eye study: prevalence and risk factors of diabetic retinopathy. Acta Ophthalmologica. 91(8). 716–721. 35 indexed citations
17.
Gøransson, Lasse G., et al.. (2011). Prevalence of diabetic retinopathy in Norway: report from a screening study. Acta Ophthalmologica. 90(7). 609–612. 18 indexed citations
18.
19.
Sundset, Rune, Geir Bertelsen, & Kirsti Ytrehus. (2003). Role of the Na+H+exchanger (NHE1) in heart muscle function during transient acidosis. A study in papillary muscles from rat and guinea pig hearts. Canadian Journal of Physiology and Pharmacology. 81(10). 937–943. 3 indexed citations
20.
Bertelsen, Geir, et al.. (2003). 127 Sustained anti-beta-adrenergic effect of opioids and bradykinin in guinea pig papillary muscle. European Journal of Heart Failure Supplements. 2(1). 19–19. 1 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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