Shigeki Nagamachi

1.9k total citations
108 papers, 1.4k citations indexed

About

Shigeki Nagamachi is a scholar working on Radiology, Nuclear Medicine and Imaging, Pulmonary and Respiratory Medicine and Molecular Biology. According to data from OpenAlex, Shigeki Nagamachi has authored 108 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 54 papers in Radiology, Nuclear Medicine and Imaging, 28 papers in Pulmonary and Respiratory Medicine and 15 papers in Molecular Biology. Recurrent topics in Shigeki Nagamachi's work include Medical Imaging Techniques and Applications (30 papers), Radiomics and Machine Learning in Medical Imaging (17 papers) and Radiopharmaceutical Chemistry and Applications (15 papers). Shigeki Nagamachi is often cited by papers focused on Medical Imaging Techniques and Applications (30 papers), Radiomics and Machine Learning in Medical Imaging (17 papers) and Radiopharmaceutical Chemistry and Applications (15 papers). Shigeki Nagamachi collaborates with scholars based in Japan, United States and United Kingdom. Shigeki Nagamachi's co-authors include Shigemi Futami, Seishi Jinnouchi, Hideyuki Wakamatsu, Shozo Tamura, Takashi Ohnishi, Hiroaki Hoshi, Ryuichi Nishii, Seigo Fujita, Katsushi Watanabe and Leo G. Flores and has published in prestigious journals such as Radiology, Arteriosclerosis Thrombosis and Vascular Biology and American Journal of Obstetrics and Gynecology.

In The Last Decade

Shigeki Nagamachi

103 papers receiving 1.4k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Shigeki Nagamachi Japan 21 578 290 229 222 199 108 1.4k
G. Ferlin Italy 18 350 0.6× 255 0.9× 228 1.0× 135 0.6× 264 1.3× 53 1.2k
Seishi Jinnouchi Japan 22 501 0.9× 382 1.3× 317 1.4× 62 0.3× 205 1.0× 117 1.5k
Shigemi Futami Japan 17 298 0.5× 200 0.7× 117 0.5× 130 0.6× 152 0.8× 44 768
Chio Okuyama Japan 16 415 0.7× 217 0.7× 146 0.6× 146 0.7× 103 0.5× 70 869
Charles Intenzo United States 24 491 0.8× 364 1.3× 518 2.3× 98 0.4× 142 0.7× 107 1.7k
Jahae Kim South Korea 20 356 0.6× 186 0.6× 122 0.5× 105 0.5× 103 0.5× 96 1.0k
Shigeharu Takagi Japan 20 222 0.4× 278 1.0× 167 0.7× 140 0.6× 244 1.2× 102 1.3k
Ü. Büll Germany 19 835 1.4× 513 1.8× 336 1.5× 274 1.2× 101 0.5× 98 1.7k
W.P.T.M. Mali Netherlands 18 283 0.5× 342 1.2× 135 0.6× 201 0.9× 92 0.5× 34 966
Chietsugu Katoh Japan 28 1.3k 2.2× 472 1.6× 411 1.8× 666 3.0× 220 1.1× 102 2.3k

Countries citing papers authored by Shigeki Nagamachi

Since Specialization
Citations

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

Fields of papers citing papers by Shigeki Nagamachi

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Shigeki Nagamachi

This figure shows the co-authorship network connecting the top 25 collaborators of Shigeki Nagamachi. A scholar is included among the top collaborators of Shigeki Nagamachi 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 Shigeki Nagamachi. Shigeki Nagamachi 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.
Umezaki, Yojiro, et al.. (2025). Alleviation of symptoms and paradoxical brain perfusion shift in oral cenesthopathy: A retrospective neuroimaging study. Frontiers in Psychiatry. 16. 1653444–1653444.
2.
3.
Nishii, Ryuichi, Shigeki Nagamachi, Youichi Mizutani, et al.. (2018). Do TSH, FT3, and FT4 Impact BAT Visualization of Clinical FDG-PET/CT Images?. Contrast Media & Molecular Imaging. 2018. 1–9. 2 indexed citations
4.
Mizutani, Yoichi, Toshinori Hirai, Shigeki Nagamachi, et al.. (2017). Prediction of Posthepatectomy Liver Failure Proposed by the International Study Group of Liver Surgery. Clinical Nuclear Medicine. 43(2). 77–81. 18 indexed citations
5.
Tsuruda, Toshihiro, et al.. (2016). Multiple 18F-Fluorodeoxyglucose Positron Emission Tomography Scans Showing Progression of Abdominal Aortic Aneurysm. Medicine. 95(19). e3650–e3650. 2 indexed citations
6.
Kobayashi, Masato, Ryuichi Nishii, Naoto Shikano, et al.. (2015). Development of radioiodine-labeled 4-hydroxyphenylcysteamine for specific diagnosis of malignant melanoma. Nuclear Medicine and Biology. 42(6). 536–540. 2 indexed citations
7.
8.
Nagamachi, Shigeki, Hideyuki Wakamatsu, Ryuichi Nishii, et al.. (2011). Comparison of diagnostic and prognostic capabilities of 18F-FDG-PET/CT, 131I-scintigraphy, and diffusion-weighted magnetic resonance imaging for postoperative thyroid cancer. Japanese Journal of Radiology. 29(6). 413–422. 23 indexed citations
9.
Wakamatsu, Hideyuki, Shigeki Nagamachi, Seigo Fujita, et al.. (2010). Predictive value of Tc-99m galactosyl human serum albumin liver SPECT on the assessment of functional recovery after partial hepatectomy: a comparison with CT volumetry. Annals of Nuclear Medicine. 24(10). 729–734. 11 indexed citations
10.
Shikano, Naoto, Norito Takamura, Ryuichi Nishii, et al.. (2009). Competitive Displacement of Serum Protein Binding of Radiopharmaceuticals with Amino Acid Infusion Investigated withN-Isopropyl-p-123I-Iodoamphetamine. Journal of Nuclear Medicine. 50(8). 1378–1383. 5 indexed citations
11.
Wakamatsu, Hideyuki, Shigeki Nagamachi, Ryuichi Nishii, et al.. (2008). Effect of percutaneous endoscopic gastrostomy on gastrointestinal motility: evaluation by gastric-emptying scintigraphy. Nuclear Medicine Communications. 29(6). 562–567. 4 indexed citations
12.
Nagamachi, Shigeki, Seigo Fujita, Ryuichi Nishii, et al.. (2006). Alteration of regional cerebral blood flow in patients with chronic pain —Evaluation before and after epidural spinal cord stimulation—. Annals of Nuclear Medicine. 20(4). 303–310. 31 indexed citations
13.
Nagamachi, Shigeki, Seishi Jinnouchi, Ryuichi Nishii, et al.. (2004). Cerebral blood flow abnormalities induced by transient hypothyroidism after thyroidectomy —analysis by Tc-99m-HMPAO and SPM96—. Annals of Nuclear Medicine. 18(6). 469–477. 35 indexed citations
14.
Wakamatsu, Hideyuki, Shiro Noguchi, Hiroyuki Yamashita, et al.. (2001). Technetium-99m tetrofosmin for parathyroid scintigraphy: a direct comparison with 99mTc-MIBI, 201Tl, MRI and US. European Journal of Nuclear Medicine and Molecular Imaging. 28(12). 1817–1827. 41 indexed citations
15.
Yokogami, Kiyotaka, Hirokazu Kawano, Takuzou Moriyama, et al.. (1998). Application of SPET using technetium-99m sestamibi in brain tumours and comparison with expression of the MDR-1 gene: is it possible to predict the response to chemotherapy in patients with gliomas by means of 99m Tc-sestamibi SPET?. European Journal of Nuclear Medicine and Molecular Imaging. 25(4). 401–409. 40 indexed citations
16.
Nagamachi, Shigeki, Seishi Jinnouchi, Leo G. Flores, et al.. (1997). [Evaluation of primary lung cancer and mediastinal lymph node metastasis using 99mTc-MIBI: comparison with 201T1 and relation to chemotherapeutic effect].. PubMed. 34(7). 453–63. 1 indexed citations
17.
Flores, Leo G., et al.. (1996). Scintigraphic evaluation of testicular torsion and acute epididymitis. Annals of Nuclear Medicine. 10(1). 89–92. 5 indexed citations
18.
Nagamachi, Shigeki, Takuya Nishikawa, Shinji Ono, et al.. (1994). Regional cerebral blood flow in diabetic patients. Nuclear Medicine Communications. 15(6). 455–460???460. 32 indexed citations
19.
Hoshi, Hiroaki, Shigemi Futami, Takashi Ohnishi, et al.. (1990). Gallium-67 uptake in fibrous dysplasia of the bone. Annals of Nuclear Medicine. 4(1). 35–38. 6 indexed citations
20.
Mori, Yukiko, Hiroaki Hoshi, Seishi Jinnouchi, et al.. (1987). Clinical evaluation of serum neuron-specific enolase level in patients with lung cancer.. RADIOISOTOPES. 36(2). 78–80. 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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