Keiichi Ishida

1.5k total citations
130 papers, 1.0k citations indexed

About

Keiichi Ishida is a scholar working on Pulmonary and Respiratory Medicine, Cardiology and Cardiovascular Medicine and Astronomy and Astrophysics. According to data from OpenAlex, Keiichi Ishida has authored 130 papers receiving a total of 1.0k indexed citations (citations by other indexed papers that have themselves been cited), including 44 papers in Pulmonary and Respiratory Medicine, 39 papers in Cardiology and Cardiovascular Medicine and 27 papers in Astronomy and Astrophysics. Recurrent topics in Keiichi Ishida's work include Pulmonary Hypertension Research and Treatments (25 papers), Stellar, planetary, and galactic studies (22 papers) and Astronomy and Astrophysical Research (16 papers). Keiichi Ishida is often cited by papers focused on Pulmonary Hypertension Research and Treatments (25 papers), Stellar, planetary, and galactic studies (22 papers) and Astronomy and Astrophysical Research (16 papers). Keiichi Ishida collaborates with scholars based in Japan, United States and Serbia. Keiichi Ishida's co-authors include Hiroki Kohno, Mizuho Imamaki, R. S. Stobie, Masahisa Masuda, Goro Matsumiya, Atsushi Ishida, Koichiro Tatsumi, Hitoshi Shimura, Nobuhiro Tanabe and Seiichiro Sakao and has published in prestigious journals such as Nature, PLoS ONE and Scientific Reports.

In The Last Decade

Keiichi Ishida

106 papers receiving 969 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Keiichi Ishida Japan 19 368 361 156 143 127 130 1.0k
Isao Kohno Japan 21 335 0.9× 192 0.5× 61 0.4× 174 1.2× 9 0.1× 106 1.4k
Ihab Girgis United States 20 235 0.6× 28 0.1× 60 0.4× 43 0.3× 21 0.2× 56 1.5k
G Jarry France 17 609 1.7× 290 0.8× 34 0.2× 57 0.4× 15 0.1× 58 1.4k
D. Revel France 20 286 0.8× 313 0.9× 16 0.1× 223 1.6× 6 0.0× 101 1.4k
Takashi Oki Japan 27 1.8k 4.9× 252 0.7× 11 0.1× 314 2.2× 12 0.1× 100 2.3k
James G. Carter United States 14 143 0.4× 32 0.1× 161 1.0× 168 1.2× 6 0.0× 37 872
Daiki Kato Japan 14 11 0.0× 275 0.8× 63 0.4× 135 0.9× 83 0.7× 118 636
A. Osa Spain 18 376 1.0× 66 0.2× 15 0.1× 306 2.1× 4 0.0× 77 885
Donald L. Johnston United States 24 714 1.9× 213 0.6× 34 0.2× 220 1.5× 3 0.0× 63 1.6k
Keiji Goto Japan 14 63 0.2× 268 0.7× 112 0.7× 356 2.5× 13 0.1× 95 723

Countries citing papers authored by Keiichi Ishida

Since Specialization
Citations

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

Fields of papers citing papers by Keiichi Ishida

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Keiichi Ishida

This figure shows the co-authorship network connecting the top 25 collaborators of Keiichi Ishida. A scholar is included among the top collaborators of Keiichi Ishida 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 Keiichi Ishida. Keiichi Ishida 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.
Ogo, Takeshi, Toshiro Shinke, Nobutaka Ikeda, et al.. (2025). Balloon Pulmonary Angioplasty for Chronic Thromboembolic Pulmonary Hypertension: A Nationwide Prospective Multicenter Registry in Japan (J-BPA). Circulation Cardiovascular Interventions. 18(12). e016172–e016172.
2.
Ishida, Keiichi, Yuji Nishimoto, Hiroyuki Ohbe, et al.. (2025). Short-term outcomes of thrombolysis versus surgical pulmonary embolectomy in patients with high-risk pulmonary embolism. Journal of Thoracic and Cardiovascular Surgery. 171(2). 410–418.e4. 1 indexed citations
3.
Ishida, Keiichi, Hiroki Kohno, Kaoru Matsuura, et al.. (2023). Impact of residual pulmonary hypertension on long‐term outcomes after pulmonary endarterectomy in the modern era. Pulmonary Circulation. 13(2). e12215–e12215. 3 indexed citations
4.
Kasai, Hajime, Toshihiko Sugiura, Akira Naito, et al.. (2023). Clinical significance of lung cross‐sectional area measured by computed tomography in chronic thromboembolic pulmonary hypertension: The correlation with pulmonary hemodynamics and the limitations. Pulmonary Circulation. 13(3). e12287–e12287. 1 indexed citations
5.
Ishii, Shiro, Junko Hara, Shigeyasu Sugawara, et al.. (2023). Different prognostic outcomes in two cases of FDG-PET/CT-Positive and -negative cardiac angiosarcoma. FUKUSHIMA JOURNAL OF MEDICAL SCIENCE. 69(1). 45–49. 1 indexed citations
6.
Ishida, Keiichi, et al.. (2019). Development of Low-Loss Boost-Chopper Circuit for Inverters Used in Air Conditioners. IEEJ Transactions on Industry Applications. 139(9). 776–783. 1 indexed citations
7.
Ishida, Keiichi, et al.. (2018). Stability Analysis of Sensorless Speed Control for PMSM Considered Current Control System. IEEJ Transactions on Industry Applications. 138(11). 848–856. 2 indexed citations
8.
Abe, Shinichiro, Keiichi Ishida, Masahisa Masuda, et al.. (2016). A prospective, randomized study of inhaled prostacyclin versus nitric oxide in patients with residual pulmonary hypertension after pulmonary endarterectomy. General Thoracic and Cardiovascular Surgery. 65(3). 153–159. 24 indexed citations
9.
10.
Kohno, Hiroki, Toru Ishizaka, Keiichi Ishida, et al.. (2012). Assessment of functional tricuspid regurgitation using 320-detector-row multislice computed tomography: Risk factor analysis for recurrent regurgitation after tricuspid annuloplasty. Journal of Thoracic and Cardiovascular Surgery. 147(1). 312–320. 38 indexed citations
11.
Kii, Toshiteru, Ryota Kinjo, Mahmoud Bakr, et al.. (2010). A STUDY ON FIELD ERROR OF BULK HTSC STAGGERED ARRAY UNDULATOR ORIGINATED FROM VARIATION OF CRITICAL CURRENT DENSITY OF BULK HTSCS. 648–651. 3 indexed citations
12.
Masuda, Kai, Keiichi Ishida, N. Kimura, et al.. (2010). Cold Testing of a Coaxial RF Cavity for Thermionic Triode RF Gun. 497–500. 1 indexed citations
13.
Iida, Hiroshi, et al.. (2009). CASE REPORT OF A QUADRICUSPID AORTIC VALVE. Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association). 70(9). 2650–2653.
14.
Noguchi, Toshihiko, et al.. (2006). Development of Low-Voltage and Large-Current DC Power Supply with High-Frequency Transformer Coupling. IEEJ Transactions on Industry Applications. 126(1). 48–55. 2 indexed citations
15.
Ishida, Keiichi, et al.. (2006). A Trial toward Marine Watch System by Image Processing(Report of the 12^ IAIN World Congress)( International Association of Institutes of Navigation). Annual of Navigation. 3. 1 indexed citations
16.
Matsuura, Kaoru, et al.. (2001). Effect of Sotalol in the prevention of atrial fibrillation following coronary artery bypass grafting. The Japanese Journal of Thoracic and Cardiovascular Surgery. 49(10). 614–617. 18 indexed citations
17.
Ishida, Keiichi, et al.. (1993). Absolute Magnitude in the K Band of Carbon Stars. Publications of the Astronomical Society of Japan. 45(4). 587–593. 1 indexed citations
18.
Shinohara, Masao & Keiichi Ishida. (1976). On the H II region NGC 1499 and Xi Persei.. Publications of the Astronomical Society of Japan. 28(3). 437–449. 1 indexed citations
19.
Ogura, Katsuo & Keiichi Ishida. (1976). UBV photometry of the stars in the fields of emission nebulae. I. M20.. Publications of the Astronomical Society of Japan. 28(1). 651–664. 2 indexed citations
20.
Ishida, Keiichi, et al.. (1968). Absolute Isophotometry of Galactic HII Regions in Hα Light. Publications of the Astronomical Society of Japan. 20(2). 95–121. 9 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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