Hiroyuki Okamoto

2.9k total citations · 1 hit paper
175 papers, 2.0k citations indexed

About

Hiroyuki Okamoto is a scholar working on Radiation, Radiology, Nuclear Medicine and Imaging and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Hiroyuki Okamoto has authored 175 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 63 papers in Radiation, 59 papers in Radiology, Nuclear Medicine and Imaging and 48 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Hiroyuki Okamoto's work include Advanced Radiotherapy Techniques (56 papers), Medical Imaging Techniques and Applications (30 papers) and Radiation Therapy and Dosimetry (25 papers). Hiroyuki Okamoto is often cited by papers focused on Advanced Radiotherapy Techniques (56 papers), Medical Imaging Techniques and Applications (30 papers) and Radiation Therapy and Dosimetry (25 papers). Hiroyuki Okamoto collaborates with scholars based in Japan, United States and Australia. Hiroyuki Okamoto's co-authors include H. Okamoto, Jun Itami, Tatsuaki Kanai, Yuki Kase, Yoshiya Furusawa, Yoshitaka Matsumoto, Naoya Murakami, Makoto Sakama, Hiroshi Igaki and Satoshi Nakamura and has published in prestigious journals such as Journal of Clinical Investigation, Physical review. B, Condensed matter and PLoS ONE.

In The Last Decade

Hiroyuki Okamoto

158 papers receiving 2.0k citations

Hit Papers

align trajectories

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.

Desk Handbook: Phase Diagrams for Binary Alloys

2000 613 citations Hiroyuki Okamoto et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Hiroyuki Okamoto Japan	19	652	562	479	427	353	175	2.0k
Norio Kato Japan	22	439 0.7×	554 1.0×	160 0.3×	478 1.1×	73 0.2×	96	1.9k
John J. DeMarco United States	32	1.8k 2.7×	1.6k 2.8×	2.2k 4.7×	353 0.8×	88 0.2×	125	3.9k
Shigeo Okuda Japan	26	39 0.1×	392 0.7×	476 1.0×	957 2.2×	446 1.3×	191	2.9k
Michael Krumrey Germany	34	1.7k 2.6×	193 0.3×	179 0.4×	980 2.3×	164 0.5×	229	4.6k
Kazunobu Hayakawa Japan	20	206 0.3×	230 0.4×	61 0.1×	242 0.6×	46 0.1×	89	1.5k
James R. Oleson United States	30	218 0.3×	402 0.7×	1.3k 2.7×	170 0.4×	53 0.2×	90	3.2k
Tina M. Briere United States	30	939 1.4×	1.0k 1.9×	741 1.5×	831 1.9×	13 0.0×	124	2.9k
Andrew N. Primak United States	35	279 0.4×	773 1.4×	4.4k 9.1×	204 0.5×	155 0.4×	85	5.7k
B. ten Haken Netherlands	34	101 0.2×	354 0.6×	564 1.2×	197 0.5×	46 0.1×	123	3.1k

Countries citing papers authored by Hiroyuki Okamoto

Since Specialization

Citations

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

Fields of papers citing papers by Hiroyuki Okamoto

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroyuki Okamoto

This figure shows the co-authorship network connecting the top 25 collaborators of Hiroyuki Okamoto. A scholar is included among the top collaborators of Hiroyuki Okamoto 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 Hiroyuki Okamoto. Hiroyuki Okamoto 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

Kojima, Toru, Hiroyuki Okamoto, Naoki Tohyama, et al.. (2024). Current status of the working environment of brachytherapy in Japan: a nationwide survey-based analysis focusing on radiotherapy technologists and medical physicists. Journal of Radiation Research. 65(6). 851–861.

Okamoto, Hiroyuki, Satoshi Nakamura, Kotaro Iijima, et al.. (2024). A new approach to assess transit dose impact in gynecological and prostate brachytherapy with effective transit time. Journal of Contemporary Brachytherapy. 16(6). 449–456. 2 indexed citations

Okamoto, Hiroyuki, Akihisa Wakita, K. Tani, et al.. (2024). Plan complexity metrics for head and neck VMAT competition plans. Medical dosimetry. 49(3). 244–253. 2 indexed citations

Arimura, Hidetaka, et al.. (2023). Magnetic resonance-based imaging biopsy with signatures including topological Betti number features for prediction of primary brain metastatic sites. Physical and Engineering Sciences in Medicine. 46(4). 1411–1426. 2 indexed citations

Nakamura, Mitsuhiro, et al.. (2023). Organ‐contour‐driven auto‐matching algorithm in image‐guided radiotherapy. Journal of Applied Clinical Medical Physics. 25(1). e14220–e14220. 1 indexed citations

Nakamura, Mitsuhiro, Dejun Zhou, Hiroyuki Okamoto, et al.. (2023). A virtual audit system for intensity‐modulated radiation therapy credentialing in Japan Clinical Oncology Group clinical trials: A pilot study. Journal of Applied Clinical Medical Physics. 24(6). e14040–e14040. 2 indexed citations

Murakami, Naoya, Tairo Kashihara, Tomoya Kaneda, et al.. (2023). Hydrogel spacer injection to the meso-sigmoid to protect the sigmoid colon in cervical cancer brachytherapy: A technical report. Journal of Contemporary Brachytherapy. 15(6). 465–469. 3 indexed citations

Tanabe, Satoshi, Naoki Tohyama, Hiroyuki Okamoto, et al.. (2023). Radiological imaging protection: a study on imaging dose used while planning computed tomography for external radiotherapy in Japan. Journal of Radiation Research. 65(2). 159–167. 2 indexed citations

Okamoto, Hiroyuki, Hiroki Nakayama, Takahito Chiba, et al.. (2023). Assessment of intrafractional motion of the cervix–uterus by MR-guided radiotherapy system. Journal of Radiation Research. 64(6). 967–972. 2 indexed citations

10.

Kashihara, Tairo, Hiroshi Igaki, Dai Ogata, et al.. (2022). Prognostic factor analysis of definitive radiotherapy using intensity-modulated radiation therapy and volumetric modulated arc therapy with boluses for scalp angiosarcomas. Scientific Reports. 12(1). 4355–4355. 6 indexed citations

11.

Kashihara, Tairo, Dai Ogata, Kae Okuma, et al.. (2022). Clinical significance of local control of primary tumour in definitive radiotherapy for scalp angiosarcomas. Skin Research and Technology. 29(1). e13243–e13243. 3 indexed citations

12.

Nakayama, Hiroki, Satoshi Nakamura, Kotaro Iijima, et al.. (2021). Efficacy of tangential irradiation with volumetric modulated arc therapy on scalp angiosarcoma using medical linac. Physica Medica. 91. 105–116. 1 indexed citations

13.

Okamoto, Hiroyuki, Tomoya Kaneda, Naoya Murakami, et al.. (2021). Evaluation of auto-segmentation accuracy of cloud-based artificial intelligence and atlas-based models. Radiation Oncology. 16(1). 175–175. 38 indexed citations

14.

Iijima, Kotaro, Naoya Murakami, Satoshi Nakamura, et al.. (2020). Configuration analysis of the injection position and shape of the gel spacer in gynecologic brachytherapy. Brachytherapy. 20(1). 95–103. 14 indexed citations

15.

Kashihara, Tairo, Satoshi Nakamura, Akihisa Wakita, et al.. (2018). Importance of the site of positive surgical margin in salvage external beam radiation therapy for biochemical recurrence of prostate cancer after radical prostatectomy. Cancer Medicine. 7(5). 1723–1730. 6 indexed citations

16.

Okamoto, Hiroyuki, Mitsuhiro Nakamura, Hideyuki Mizuno, et al.. (2018). Establishment of postal audit system in intensity-modulated radiotherapy by radiophotoluminescent glass dosimeters and a radiochromic film. Physica Medica. 48. 119–126. 20 indexed citations

17.

Okamoto, Hiroyuki, Naoya Murakami, Yuki Miura, et al.. (2017). Positional uncertainty of vaginal cuff and feasibility of implementing portable bladder scanner in postoperative cervical cancer patients. Physica Medica. 45. 1–5. 14 indexed citations

18.

Murakami, Naoya, Hiroyuki Okamoto, Takahiro Kasamatsu, et al.. (2014). A dosimetric analysis of intensity-modulated radiation therapy with bone marrow sparing for cervical cancer.. PubMed. 34(9). 5091–8. 15 indexed citations

19.

Okamoto, Hiroyuki, et al.. (1994). Measurements of hydrogen loading ratio of Pd anodes polarized in LiH-LiCl-KCl molten salt systems. Fusion Technology. 26. 59–62. 1 indexed citations

20.

Okamoto, Hiroyuki, et al.. (1993). Generalized Langevin Equation for Two-Dimensional Inviscid Barotropic Vorticity: Fluctuation-Dissipation Theorem and Eddy Viscosity. Progress of Theoretical Physics. 90(2). 343–351. 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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