Hiroshi Oba

4.6k total citations · 2 hit papers
91 papers, 3.0k citations indexed

About

Hiroshi Oba is a scholar working on Radiology, Nuclear Medicine and Imaging, Surgery and Epidemiology. According to data from OpenAlex, Hiroshi Oba has authored 91 papers receiving a total of 3.0k indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Radiology, Nuclear Medicine and Imaging, 16 papers in Surgery and 15 papers in Epidemiology. Recurrent topics in Hiroshi Oba's work include Advanced MRI Techniques and Applications (11 papers), Medical Imaging Techniques and Applications (8 papers) and Liver Disease Diagnosis and Treatment (8 papers). Hiroshi Oba is often cited by papers focused on Advanced MRI Techniques and Applications (11 papers), Medical Imaging Techniques and Applications (8 papers) and Liver Disease Diagnosis and Treatment (8 papers). Hiroshi Oba collaborates with scholars based in Japan and United States. Hiroshi Oba's co-authors include Shigeru Furui, Keiko Toyoda, Tomonori Kanda, J. Kotoku, Kazuhiro Kitajima, Takahiro Haruyama, Megumi Matsuda, A. James Barkovich, Jun‐ichi Takanashi and Koji Takeshita and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Neurology.

In The Last Decade

Hiroshi Oba

83 papers receiving 2.9k 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.

Gadolinium-based Contrast Agent Accumulates in the Brain Even in Subjects without Severe Renal Dysfunction: Evaluation of Autopsy Brain Specimens with Inductively Coupled Plasma Mass Spectroscopy

2015 683 citations Keiko Toyoda, Hiroshi Oba et al. profile →
High Signal Intensity in Dentate Nucleus on Unenhanced T1-weighted MR Images: Association with Linear versus Macrocyclic Gadolinium Chelate Administration

2015 353 citations Hiroshi Oba, Keiko Toyoda et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Hiroshi Oba Japan	22	1.1k	890	632	424	376	91	3.0k
Michimasa Suzuki Japan	27	1.1k 1.0×	50 0.1×	422 0.7×	652 1.5×	254 0.7×	98	3.5k
Hubertus Pietsch Germany	34	2.4k 2.1×	1.8k 2.0×	67 0.1×	240 0.6×	38 0.1×	140	3.8k
Akira Matsumura Japan	39	1.9k 1.7×	644 0.7×	60 0.1×	1.1k 2.6×	34 0.1×	418	6.5k
Mary Girton United States	26	486 0.4×	203 0.2×	78 0.1×	191 0.5×	34 0.1×	61	1.6k
Val M. Runge United States	44	4.2k 3.7×	2.1k 2.3×	46 0.1×	382 0.9×	22 0.1×	233	6.6k
Hiroki Kato Japan	25	664 0.6×	147 0.2×	65 0.1×	171 0.4×	27 0.1×	185	3.2k
Laurie A. Loevner United States	37	1.6k 1.4×	89 0.1×	180 0.3×	601 1.4×	22 0.1×	161	5.2k
Toshihide Ogawa Japan	40	2.4k 2.1×	125 0.1×	60 0.1×	1.4k 3.3×	23 0.1×	210	5.2k
Sanjay Behari India	33	652 0.6×	38 0.0×	210 0.3×	1.1k 2.6×	162 0.4×	300	4.1k
Hitoshi Sato Japan	25	265 0.2×	453 0.5×	33 0.1×	83 0.2×	36 0.1×	172	2.7k

Countries citing papers authored by Hiroshi Oba

Since Specialization

Citations

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

Fields of papers citing papers by Hiroshi Oba

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Hiroshi Oba

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

Hayashi, Tatsuya, Shinya Kojima, Norio Hayashi, et al.. (2023). Evaluation of deep learning reconstruction on diffusion-weighted imaging quality and apparent diffusion coefficient using an ice-water phantom. Radiological Physics and Technology. 17(1). 186–194. 1 indexed citations

Yamamoto, Masayoshi, et al.. (2023). Percutaneous Covered Stenting in Splenic Vein for Left-sided Portal Hypertension Caused by Chronic Splenic Vein Obstruction. PubMed. 9(1). 31–35. 1 indexed citations

Oba, Hiroshi, et al.. (2020). First experience of 192Ir source stuck event during high-dose-rate brachytherapy in Japan. Journal of Contemporary Brachytherapy. 12(1). 53–60. 5 indexed citations

Sakurai, Keita, Aya M. Tokumaru, Toshimasa Ikeda, et al.. (2019). Characteristic asymmetric limbic and anterior temporal atrophy in demented patients with pathologically confirmed argyrophilic grain disease. Neuroradiology. 61(11). 1239–1249. 24 indexed citations

Sakurai, Keita, Satoru Morimoto, Hiroyuki Yuasa, et al.. (2019). Multifaceted structural magnetic resonance imaging findings in demented patients with pathologically confirmed TDP-43 proteinopathy. Neuroradiology. 61(11). 1333–1339. 6 indexed citations

Tatekawa, Hiroyuki, Shinichi Sakamoto, Masaaki Hori, et al.. (2018). Imaging Differences between Neuromyelitis Optica Spectrum Disorders and Multiple Sclerosis: A Multi-Institutional Study in Japan. American Journal of Neuroradiology. 39(7). 1239–1247. 20 indexed citations

Hayashi, Tatsuya, Hiroshi Kondo, Hiroshi Onodera, et al.. (2018). Influence of Gd-EOB-DTPA on T1 dependence of the proton density fat fraction using magnetic resonance spectroscopy. Radiological Physics and Technology. 11(3). 338–344.

Hayashi, Tatsuya, Takashi Konno, Tosiaki Miyati, et al.. (2018). Multicenter, multivendor phantom study to validate proton density fat fraction and T2* values calculated using vendor-provided 6-point DIXON methods. Clinical Imaging. 51. 38–42. 9 indexed citations

Hayashi, Tatsuya, Hiroshi Kondo, Hiroshi Onodera, et al.. (2017). Influence of Gd-EOB-DTPA on proton density fat fraction using the six-echo Dixon method in 3 Tesla magnetic resonance imaging. Radiological Physics and Technology. 10(4). 483–488. 5 indexed citations

10.

Yamamoto, Asako, Hiroshi Oba, & Shigeru Furui. (2012). Influence of age and sex on signal intensities of the posterior lobe of the pituitary gland on T1-weighted images from 3 T MRI. Japanese Journal of Radiology. 31(3). 186–191. 10 indexed citations

11.

Toyoda, Keiko, Hiroshi Oba, K Kutomi, et al.. (2012). MR Imaging of IgG4-Related Disease in the Head and Neck and Brain. American Journal of Neuroradiology. 33(11). 2136–2139. 81 indexed citations

12.

Nakata, Yasuhiro, Noriko Sato, T. Masumoto, et al.. (2010). Parasellar T2 Dark Sign on MR Imaging in Patients with Lymphocytic Hypophysitis. American Journal of Neuroradiology. 31(10). 1944–1950. 34 indexed citations

13.

Oba, Hiroshi, et al.. (2002). Fatigue resistance of filled NR with PMMA-wrapped and rare earth-doped alumina-siloxane gel. Journal of Rare Earths. 20(4). 278–281. 2 indexed citations

14.

Takeshita, Koji, Ikuo Nagashima, Koichi Takada, et al.. (2002). Effect of Superparamagnetic Iron Oxide-Enhanced MRI of the Liver With Hepatocellular Carcinoma and Hyperplastic Nodule. Journal of Computer Assisted Tomography. 26(3). 451–455. 17 indexed citations

15.

Aihara, Masao, Hiroshi Oba, Kuni Ohtomo, et al.. (1995). MRI of white matter changes in the Sj�gren-Larsson syndrome. Neuroradiology. 37(7). 576–577. 10 indexed citations

16.

Monzawa, Shuichi, et al.. (1994). Septa in the liver of patients with chronic hepatic schistosomiasis japonica: MR appearance.. American Journal of Roentgenology. 162(6). 1347–1351. 7 indexed citations

17.

Matsuda, Hiroshi, Hiroshi Oba, Hitoshi Terada, et al.. (1988). Quantitative assessment of cerebral blood flow using Technetium-99m-hexamethyl-propyleneamine oxime: Part I, design of a mathematical model. Annals of Nuclear Medicine. 2(1). 13–19. 6 indexed citations

18.

Matsuda, Hiroshi, Shiro Tsuji, Hiroshi Oba, et al.. (1988). Direct autoradiographic comparison of 99Tcm-HMPAO with 125I-IMP in experimental brain ischaemia. Nuclear Medicine Communications. 9(11). 891–897. 1 indexed citations

19.

Oba, Hiroshi, et al.. (1972). Current Situation of the Use of QT High Strength Steels in Japan. Transactions of the Japan Welding Society. 3(1). 13–38.

20.

Fujimoto, Hiroshi, Hiroshi Oba, & Kenichi Fukui. (1969). An Extended Hückel Calculation on the Allylic Rearrangement of Olefins. Nippon kagaku zassi. 90(10). 1005–1011. 2 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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