Koichi Ishiyama

480 total citations
40 papers, 347 citations indexed

About

Koichi Ishiyama is a scholar working on Pulmonary and Respiratory Medicine, Surgery and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, Koichi Ishiyama has authored 40 papers receiving a total of 347 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Pulmonary and Respiratory Medicine, 15 papers in Surgery and 10 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in Koichi Ishiyama's work include Lung Cancer Diagnosis and Treatment (9 papers), Esophageal Cancer Research and Treatment (5 papers) and Medical Imaging Techniques and Applications (3 papers). Koichi Ishiyama is often cited by papers focused on Lung Cancer Diagnosis and Treatment (9 papers), Esophageal Cancer Research and Treatment (5 papers) and Medical Imaging Techniques and Applications (3 papers). Koichi Ishiyama collaborates with scholars based in Japan. Koichi Ishiyama's co-authors include Manabu Hashimoto, Satoru Motoyama, Jiro Watarai, Yoshihiro Minamiya, Jun‐ichi Ogawa, Noriaki Tomura, Yuzo Yamamoto, Makoto Koga, Takahiro Otani and Hiroshi Nanjo and has published in prestigious journals such as SHILAP Revista de lepidopterología, American Journal of Roentgenology and Journal of Magnetic Resonance Imaging.

In The Last Decade

Koichi Ishiyama

40 papers receiving 339 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Koichi Ishiyama Japan 12 154 145 75 74 50 40 347
Georg Stuecklschweiger Austria 10 163 1.1× 187 1.3× 158 2.1× 46 0.6× 73 1.5× 15 507
Gamze Uğurluer Türkiye 11 84 0.5× 159 1.1× 95 1.3× 89 1.2× 28 0.6× 50 373
Hollins Clark United States 10 98 0.6× 181 1.2× 135 1.8× 59 0.8× 43 0.9× 20 436
J. H. Risse Germany 9 197 1.3× 89 0.6× 179 2.4× 123 1.7× 59 1.2× 19 449
Jae‐Ho Chung South Korea 13 264 1.7× 127 0.9× 43 0.6× 78 1.1× 29 0.6× 76 477
Peeyush Bhargava United States 11 144 0.9× 148 1.0× 148 2.0× 41 0.6× 32 0.6× 15 370
Jörn H. Risse Germany 10 192 1.2× 62 0.4× 144 1.9× 76 1.0× 99 2.0× 15 454
Kerry Thomas United States 12 76 0.5× 73 0.5× 39 0.5× 87 1.2× 54 1.1× 29 308
Koya Nakatani Japan 12 84 0.5× 115 0.8× 110 1.5× 96 1.3× 48 1.0× 18 336
Krishan Kant Agarwal India 9 105 0.7× 145 1.0× 162 2.2× 88 1.2× 41 0.8× 30 345

Countries citing papers authored by Koichi Ishiyama

Since Specialization
Citations

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

Fields of papers citing papers by Koichi Ishiyama

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Koichi Ishiyama

This figure shows the co-authorship network connecting the top 25 collaborators of Koichi Ishiyama. A scholar is included among the top collaborators of Koichi Ishiyama 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 Koichi Ishiyama. Koichi Ishiyama 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.
Takahashi, Eriko, Kazuhiro Imai, Mayuko Fukuyama, et al.. (2022). Changes in Serum Trace Element Concentrations Before and After Surgery in Resectable Breast Cancer. Anticancer Research. 42(11). 5323–5334. 3 indexed citations
2.
Takahashi, Eriko, Hiroshi Nanjo, Koichi Ishiyama, et al.. (2021). A male with primary accessory breast carcinoma in an axilla is strongly suspected of having hereditary breast cancer. International Cancer Conference Journal. 10(2). 107–111. 3 indexed citations
3.
Takahashi, Toshifumi, Eri Maeda, Koichi Ishiyama, et al.. (2021). Effects of localisation of uterine adenomyosis on outcome of in vitro fertilisation/intracytoplasmic sperm injection fresh and frozen-thawed embryo transfer cycles: a multicentre retrospective cohort study. Reproductive Biology and Endocrinology. 19(1). 84–84. 10 indexed citations
4.
Asano, Tomoyuki, et al.. (2018). Analysis of computed tomography density of liver before and after amiodarone administration. Japanese Journal of Radiology. 36(5). 340–344. 6 indexed citations
5.
Yoshioka, Masato, Hiroshi Uchinami, Go Watanabe, et al.. (2015). F-18 fluorodeoxyglucose positron emission tomography for differential diagnosis of pancreatic tumors. SpringerPlus. 4(1). 154–154. 10 indexed citations
6.
Motoyama, Satoru, Mario Jin, Tamotsu Matsuhashi, et al.. (2012). Outcomes of patients receiving additional esophagectomy after endoscopic resection for clinically mucosal, but pathologically submucosal, squamous cell carcinoma of the esophagus. Surgery Today. 43(6). 638–642. 30 indexed citations
7.
8.
Saito, Hajime, Yoshihiro Minamiya, Hideki Kawai, et al.. (2007). Usefulness of circumference difference for estimating the likelihood of malignancy in small solitary pulmonary nodules on CT. Lung Cancer. 58(3). 348–354. 13 indexed citations
9.
Hashimoto, Manabu, Makoto Koga, Koichi Ishiyama, et al.. (2007). CT Features of Pancreatic Fistula After Pancreaticoduodenectomy. American Journal of Roentgenology. 188(4). W323–W327. 20 indexed citations
10.
Watanabe, Naoki, et al.. (2007). Chemical synthesis of a very long RNA oligomer, a 110mer precursor-miRNA candidate, with 2-cyanoethoxymethyl (CEM) as the 2'-O-protecting group. Nucleic Acids Symposium Series. 51(1). 3–4. 3 indexed citations
11.
Shimizu, Dai, et al.. (2007). Cervical varix with placenta previa totalis. Journal of obstetrics and gynaecology research. 33(4). 536–538. 18 indexed citations
12.
Sakata, Asuka, Takeshi Kato, Makoto Kume, et al.. (2006). Delayed Abscess in a Femoral Hernial Sac Secondary to Diffuse Peritonitis : report of a case. 33(3). 229–231. 2 indexed citations
13.
Ishiyama, Koichi, Satoru Motoyama, Noriaki Tomura, et al.. (2006). Visualization of Lymphatic Basin From the Tumor Using Magnetic Resonance Lymphography With Superparamagnetic Iron Oxide in Patients With Thoracic Esophageal Cancer. Journal of Computer Assisted Tomography. 30(2). 270–275. 16 indexed citations
14.
Motoyama, Satoru, Manabu Okuyama, Reijiro Saito, et al.. (2005). Magnetic resonance imaging for chylothorax after esophagectomy. The Japanese Journal of Thoracic and Cardiovascular Surgery. 53(8). 434–436. 6 indexed citations
15.
Ishiyama, Koichi, Noriaki Tomura, Kyoji Okada, et al.. (2005). Evaluating Benign and Malignant Musculoskeletal Lesions With Radionuclide Angiography and SPECT Using Tc-99m MIBI. Clinical Nuclear Medicine. 30(9). 598–603. 4 indexed citations
16.
Ishiyama, Koichi, Manabu Hashimoto, Etsuko Tate, et al.. (2002). [Feasibility of early ambulation three hours after transfemoral angiography using a 4 French sheath].. PubMed. 62(7). 362–5. 4 indexed citations
17.
Ishiyama, Koichi, et al.. (2002). [Sentinel lymph node after intramammary injection of superparamagnetic iron oxide].. PubMed. 62(13). 744–6. 4 indexed citations
18.
Hashimoto, Manabu, et al.. (2002). Small veins entering the liver. European Radiology. 12(8). 2000–2005. 19 indexed citations
19.
Marubayashi, Seiji, Koichi Ishiyama, Kazuki Fukuma, et al.. (1998). A case of abdominal aortic aneurysm associated with systemic lupus erythematosus.. PubMed. 47(2). 85–7. 5 indexed citations
20.
Kida, Akinori, et al.. (1995). Clinical Assessment of Squamous Cell Carcinoma of the Nasal Cavity Proper. Auris Nasus Larynx. 22(3). 172–177. 5 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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