Hyejun Ra

1.3k total citations
19 papers, 1.0k citations indexed

About

Hyejun Ra is a scholar working on Biophysics, Biomedical Engineering and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Hyejun Ra has authored 19 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Biophysics, 13 papers in Biomedical Engineering and 3 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Hyejun Ra's work include Advanced Fluorescence Microscopy Techniques (13 papers), Optical Coherence Tomography Applications (11 papers) and Photoacoustic and Ultrasonic Imaging (10 papers). Hyejun Ra is often cited by papers focused on Advanced Fluorescence Microscopy Techniques (13 papers), Optical Coherence Tomography Applications (11 papers) and Photoacoustic and Ultrasonic Imaging (10 papers). Hyejun Ra collaborates with scholars based in United States, Thailand and South Korea. Hyejun Ra's co-authors include Olav Solgaard, Wibool Piyawattanametha, Michael J. Mandella, Christopher H. Contag, G. S. Kino, Robert P. J. Barretto, Eric D. Cocker, Mark J. Schnitzer, Dae-Sung Lee and Daesung Lee and has published in prestigious journals such as Optics Letters, Optics Express and Journal of Investigative Dermatology.

In The Last Decade

Hyejun Ra

19 papers receiving 978 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Hyejun Ra United States 14 654 462 236 121 101 19 1.0k
Bernhard Messerschmidt Germany 14 550 0.8× 474 1.0× 150 0.6× 117 1.0× 85 0.8× 51 933
Wenxuan Liang United States 17 666 1.0× 438 0.9× 92 0.4× 78 0.6× 188 1.9× 37 961
Erich E. Hoover United States 17 621 0.9× 449 1.0× 132 0.6× 174 1.4× 143 1.4× 23 983
Rodney W. Kirk Australia 18 941 1.4× 249 0.5× 118 0.5× 70 0.6× 301 3.0× 31 1.1k
Christoph J. Engelbrecht Switzerland 7 423 0.6× 392 0.8× 94 0.4× 93 0.8× 136 1.3× 7 880
Daniel T. McCormick United States 15 735 1.1× 190 0.4× 425 1.8× 189 1.6× 190 1.9× 43 1.1k
Bryden C. Quirk Australia 17 970 1.5× 233 0.5× 101 0.4× 68 0.6× 373 3.7× 26 1.1k
David Mayerich United States 17 265 0.4× 662 1.4× 100 0.4× 59 0.5× 165 1.6× 80 1.1k
Beop-Min Kim South Korea 21 567 0.9× 189 0.4× 59 0.3× 160 1.3× 301 3.0× 59 1.1k
Dirk Lorenser Australia 21 769 1.2× 263 0.6× 391 1.7× 358 3.0× 201 2.0× 33 1.2k

Countries citing papers authored by Hyejun Ra

Since Specialization
Citations

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

Fields of papers citing papers by Hyejun Ra

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hyejun Ra

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

All Works

19 of 19 papers shown
1.
Kilic, Onur, Hyejun Ra, Onur Can Akkaya, Michel J. F. Digonnet, & Olav Solgaard. (2016). Haltere-Like Optoelectromechanical Gyroscope. IEEE Sensors Journal. 16(11). 4274–4280. 9 indexed citations
2.
Ra, Hyejun, Emilio González-González, Md. Jashim Uddin, et al.. (2015). Detection of Non-Melanoma Skin Cancer by in vivo Fluorescence Imaging with Fluorocoxib A. Neoplasia. 17(2). 201–207. 27 indexed citations
3.
Piyawattanametha, Wibool, Hyejun Ra, Kevin Loewke, et al.. (2012). In vivo near-infrared dual-axis confocal microendoscopy in the human lower gastrointestinal tract. Journal of Biomedical Optics. 17(2). 1–1. 66 indexed citations
4.
Hoy, Christopher L., Onur Ferhanoğlu, Murat Yıldırım, et al.. (2011). Optical design and imaging performance testing of a 96-mm diameter femtosecond laser microsurgery probe. Optics Express. 19(11). 10536–10536. 49 indexed citations
5.
Ra, Hyejun, Wibool Piyawattanametha, Emilio González-González, et al.. (2010). In Vivo Imaging of Human and Mouse Skin with a Handheld Dual-Axis Confocal Fluorescence Microscope. Journal of Investigative Dermatology. 131(5). 1061–1066. 21 indexed citations
6.
Liu, Jonathan, Michael J. Mandella, Nathan O. Loewke, et al.. (2010). Micromirror-scanned dual-axis confocal microscope utilizing a gradient-index relay lens for image guidance during brain surgery. Journal of Biomedical Optics. 15(2). 26029–26029. 61 indexed citations
7.
Ra, Hyejun, Emilio González-González, Bryan Ronain Smith, et al.. (2010). Assessing delivery and quantifying efficacy of small interfering ribonucleic acid therapeutics in the skin using a dual-axis confocal microscope. Journal of Biomedical Optics. 15(3). 36027–36027. 13 indexed citations
8.
Piyawattanametha, Wibool, Eric D. Cocker, Robert P. J. Barretto, et al.. (2009). In vivo brain imaging using a portable 29 g two-photon microscope based on a microelectromechanical systems scanning mirror. Optics Letters. 34(15). 2309–2309. 130 indexed citations
9.
Piyawattanametha, Wibool, Hyejun Ra, Michael J. Mandella, et al.. (2009). 3-D Near-Infrared Fluorescence Imaging Using an MEMS-Based Miniature Dual-Axis Confocal Microscope. IEEE Journal of Selected Topics in Quantum Electronics. 15(5). 1344–1350. 31 indexed citations
10.
Hoy, Christopher L., Nicholas J. Durr, Pengyuan Chen, et al.. (2008). Miniaturized probe for femtosecond laser microsurgery and two-photon imaging. Optics Express. 16(13). 9996–9996. 95 indexed citations
11.
Ra, Hyejun, Wibool Piyawattanametha, Michael J. Mandella, et al.. (2008). Three-dimensional in vivo imaging by a handheld dual-axes confocal microscope. Optics Express. 16(10). 7224–7224. 69 indexed citations
12.
Hoy, Christopher L., Nicholas J. Durr, Pengyuan Chen, et al.. (2008). Two-photon luminescence imaging using a MEMS-based miniaturized probe. 1–2. 2 indexed citations
13.
Liu, Jonathan, Michael J. Mandella, Hyejun Ra, et al.. (2007). Miniature near-infrared dual-axes confocal microscope utilizing a two-dimensional microelectromechanical systems scanner. Optics Letters. 32(3). 256–256. 70 indexed citations
14.
Ra, Hyejun, Wibool Piyawattanametha, Yoshihiro Taguchi, et al.. (2007). Two-Dimensional MEMS Scanner for Dual-Axes Confocal Microscopy. Journal of Microelectromechanical Systems. 16(4). 969–976. 109 indexed citations
15.
Piyawattanametha, Wibool, Eric D. Cocker, Robert P. J. Barretto, et al.. (2007). A Portable Two-photon Fluorescence Microendoscope Based on a Two-dimensional Scanning Mirror. 6–7. 7 indexed citations
16.
Mandella, Michael J., Jonathan Liu, Wibool Piyawattanametha, et al.. (2007). Compact optical design for dual-axes confocal endoscopic microscopes. Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE. 6443. 64430E–64430E. 1 indexed citations
17.
Shin, Hyun‐Joon, Mark C. Pierce, Dae-Sung Lee, et al.. (2007). Fiber-optic confocal microscope using a MEMS scanner and miniature objective lens. Optics Express. 15(15). 9113–9113. 90 indexed citations
18.
Piyawattanametha, Wibool, Robert P. J. Barretto, Tony H. Ko, et al.. (2006). Fast-scanning two-photon fluorescence imaging based on a microelectromechanical systems two- dimensional scanning mirror. Optics Letters. 31(13). 2018–2018. 120 indexed citations
19.
Maitland, Kristen C., Hyun Joon Shin, Hyejun Ra, et al.. (2006). Single fiber confocal microscope with a two-axis gimbaled MEMS scanner for cellular imaging. Optics Express. 14(19). 8604–8604. 35 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Bernhard Messerschmidt Breakdown of academic impact, for papers by Wenxuan Liang Breakdown of academic impact, for papers by Erich E. Hoover Breakdown of academic impact, for papers by Rodney W. Kirk Breakdown of academic impact, for papers by Christoph J. Engelbrecht Breakdown of academic impact, for papers by Daniel T. McCormick Breakdown of academic impact, for papers by Bryden C. Quirk Breakdown of academic impact, for papers by David Mayerich Breakdown of academic impact, for papers by Beop-Min Kim Breakdown of academic impact, for papers by Dirk Lorenser
Rankless by CCL
2026