A. Okumura

18.4k total citations
73 papers, 1.3k citations indexed

About

A. Okumura is a scholar working on Nuclear and High Energy Physics, Pulmonary and Respiratory Medicine and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, A. Okumura has authored 73 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 19 papers in Nuclear and High Energy Physics, 15 papers in Pulmonary and Respiratory Medicine and 11 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in A. Okumura's work include Astrophysics and Cosmic Phenomena (18 papers), Particle Detector Development and Performance (13 papers) and Dark Matter and Cosmic Phenomena (7 papers). A. Okumura is often cited by papers focused on Astrophysics and Cosmic Phenomena (18 papers), Particle Detector Development and Performance (13 papers) and Dark Matter and Cosmic Phenomena (7 papers). A. Okumura collaborates with scholars based in Japan, Germany and United States. A. Okumura's co-authors include Yuji Watanabe, Yoshiki Amoh, Yoshihiro Dodo, Masako Nagayama, Satoru Nakashita, Takayoshi Ishimori, Masaaki Goto, Takeshi Katsuki, Shinichi Kakumu and Tetsuya Ishikawa and has published in prestigious journals such as Gastroenterology, Biomaterials and Analytical Chemistry.

In The Last Decade

A. Okumura

66 papers receiving 1.2k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
A. Okumura Japan 19 358 302 188 185 166 73 1.3k
Iio M Japan 18 288 0.8× 134 0.4× 230 1.2× 269 1.5× 144 0.9× 112 1.1k
Raffaele Liuzzi Italy 29 282 0.8× 529 1.8× 357 1.9× 774 4.2× 239 1.4× 124 2.3k
Yasuyuki Sugiyama Japan 24 344 1.0× 415 1.4× 93 0.5× 94 0.5× 92 0.6× 170 2.1k
Kazuyoshi Saito Japan 19 374 1.0× 236 0.8× 75 0.4× 39 0.2× 192 1.2× 74 960
Hiroki Morita Japan 20 307 0.9× 149 0.5× 128 0.7× 44 0.2× 126 0.8× 122 1.5k
M. Trovò Italy 21 228 0.6× 783 2.6× 127 0.7× 358 1.9× 95 0.6× 130 1.9k
Edwin F. Donnelly United States 22 192 0.5× 646 2.1× 63 0.3× 501 2.7× 339 2.0× 66 2.2k
Eiichi Tanaka Japan 21 225 0.6× 231 0.8× 80 0.4× 585 3.2× 277 1.7× 69 1.7k
Yoshiki Yamashita Japan 24 229 0.6× 170 0.6× 256 1.4× 103 0.6× 141 0.8× 137 2.1k
Dimitrios G. Spigos United States 22 545 1.5× 463 1.5× 146 0.8× 475 2.6× 181 1.1× 85 1.6k

Countries citing papers authored by A. Okumura

Since Specialization
Citations

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

Fields of papers citing papers by A. Okumura

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of A. Okumura

This figure shows the co-authorship network connecting the top 25 collaborators of A. Okumura. A scholar is included among the top collaborators of A. Okumura 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 A. Okumura. A. Okumura 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.
Nagayoshi, T., S. Sakurai, Mitsunari Takahashi, et al.. (2025). Competition between increasing and decreasing effects of the afterpulsing rate of PMTs during night-sky observations. Journal of Instrumentation. 20(6). C06005–C06005.
2.
Zink, A., G. Varner, Davide Depaoli, et al.. (2024). CTC and CT5TEA: An advanced multi-channel digitizer and trigger ASIC for imaging atmospheric Cherenkov telescopes. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 1069. 169841–169841.
3.
Tajima, H., et al.. (2023). Studies of propagation mechanism of optical crosstalk in silicon photomultipliers. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 1049. 168029–168029. 1 indexed citations
4.
Gaug, M., S. Fegan, Alison Mitchell, et al.. (2019). Using Muon Rings for the Optical Throughput Calibration of the Cherenkov Telescope Array. Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019). 684–684. 2 indexed citations
5.
Rousselle, J., K. Byrum, R. A. Cameron, et al.. (2015). Construction of a Schwarzschild-Couder telescope as a candidate for the Cherenkov Telescope Array: Status of the optical system. Max Planck Digital Library. 938. 1 indexed citations
6.
Sasano, M., H. Nishioka, Kazuhiro Nakazawa, et al.. (2013). Geometry dependence of the light collection efficiency of BGO crystal scintillators read out by avalanche photo diodes. Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment. 715. 105–111. 16 indexed citations
7.
Okumura, A., et al.. (2011). Development of Non-sequential Ray-tracing Software for Cosmic-ray Telescopes. ICRC. 9. 211. 2 indexed citations
8.
Tsuji, Yoshihisa, Yuji Watanabe, A. Okumura, et al.. (2010). Perfusion CT is superior to angiography in predicting pancreatic necrosis in patients with severe acute pancreatitis. Journal of Gastroenterology. 45(11). 1155–1162. 18 indexed citations
9.
Okumura, A., Masako Tsuzuki, Tomoyuki Wada, et al.. (2007). Efficacy of Difluprednate Ophthalmic Emulsion in Preclinical Studies of Uveitis. Investigative Ophthalmology & Visual Science. 48(13). 2652–2652. 3 indexed citations
10.
Watanabe, Yuji, et al.. (2007). MR imaging of testicular torsion: Features of testicular hemorrhagic necrosis and clinical outcomes. Journal of Magnetic Resonance Imaging. 26(1). 100–108. 35 indexed citations
11.
Shen, Luhui, et al.. (2006). The SHAP–hyaluronan complex in serum from patients with chronic liver diseases caused by hepatitis virus infection. Hepatology Research. 34(3). 178–186. 13 indexed citations
12.
Nagayama, Masako, Yuji Watanabe, A. Okumura, et al.. (2002). Fast MR Imaging in Obstetrics. Radiographics. 22(3). 563–580. 114 indexed citations
13.
Watanabe, Yuji, Masako Nagayama, Yoshiki Amoh, et al.. (2002). High‐resolution selective three‐dimensional magnetic resonance coronary angiography with navigator‐echo technique: Segment‐by‐segment evaluation of coronary artery stenosis. Journal of Magnetic Resonance Imaging. 16(3). 238–245. 19 indexed citations
14.
Watanabe, Yuji, Masako Dohke, Takayoshi Ishimori, et al.. (2000). Pseudo-obstruction of the Extrahepatic Bile Duct Due to Artifact from Arterial Pulsatile Compression: A Diagnostic Pitfall of MR Cholangiopancreatography. Radiology. 214(3). 856–860. 25 indexed citations
15.
Yamaguchi, T, Tetsuya Fujii, A. Okumura, et al.. (1999). Construction of A Prototype Inter-hospital Medical Picture Archiving and Communication System for Telemedicine. IEICE technical report. Speech. 99(342). 31–36. 2 indexed citations
16.
Okumura, A., et al.. (1997). Signal analysis and compression performance evaluation of pathological microscopic images. IEEE Transactions on Medical Imaging. 16(6). 701–710. 18 indexed citations
17.
Dohke, Masako, Yuji Watanabe, Akira Takahashi, et al.. (1997). Struma Ovarii: MR Findings. Journal of Computer Assisted Tomography. 21(2). 265–267. 21 indexed citations
18.
Ishikawa, Toru, et al.. (1997). Interleukin 2 and T-cell receptors in peripheral blood of patients with chronic hepatitis C virus infection. Hepatology Research. 7(2). 83–93. 2 indexed citations
19.
Fujita, Hiroshi, A. Okumura, & Koichi Furukawa. (1988). Partial Evaluation of GHC Programs Based on the UR-set with Constraints.. International Conference on Lightning Protection. 924–941. 8 indexed citations
20.
Okumura, A. & Yuji Matsumoto. (1987). Parallel Programming with Layered Streams.. 224–232. 7 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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