Masashi Usa

489 total citations
31 papers, 386 citations indexed

About

Masashi Usa is a scholar working on Physiology, Radiology, Nuclear Medicine and Imaging and Biomedical Engineering. According to data from OpenAlex, Masashi Usa has authored 31 papers receiving a total of 386 indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Physiology, 10 papers in Radiology, Nuclear Medicine and Imaging and 9 papers in Biomedical Engineering. Recurrent topics in Masashi Usa's work include Biofield Effects and Biophysics (12 papers), Optical Imaging and Spectroscopy Techniques (9 papers) and Photoreceptor and optogenetics research (6 papers). Masashi Usa is often cited by papers focused on Biofield Effects and Biophysics (12 papers), Optical Imaging and Spectroscopy Techniques (9 papers) and Photoreceptor and optogenetics research (6 papers). Masashi Usa collaborates with scholars based in Japan, France and United States. Masashi Usa's co-authors include Humio Inaba, B. Devaraj, Masaki Kobayashi, Masaki Kobayashi, Motohiro Takeda, Haruo Watanabe, T. Akatsuka, Kin Pui Chan, Masaki Kobayashi and Toshiyasu Amano and has published in prestigious journals such as Applied Physics Letters, Clinical Chemistry and Cancer Letters.

In The Last Decade

Masashi Usa

28 papers receiving 354 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Masashi Usa Japan	11	237	114	99	83	83	31	386
B. Devaraj Japan	13	240 1.0×	76 0.7×	125 1.3×	145 1.7×	91 1.1×	45	487
Alberto Foletti Italy	14	322 1.4×	125 1.1×	256 2.6×	72 0.9×	80 1.0×	42	567
Yahya Akyel United States	8	83 0.4×	37 0.3×	228 2.3×	120 1.4×	18 0.2×	20	365
W. Grundler Germany	8	180 0.8×	41 0.4×	238 2.4×	62 0.7×	39 0.5×	9	409
Lily Soo United States	15	265 1.1×	176 1.5×	432 4.4×	86 1.0×	84 1.0×	33	740
M. N. Zhadin Russia	11	261 1.1×	52 0.5×	300 3.0×	39 0.5×	51 0.6×	29	504
André Berglund Sweden	7	120 0.5×	82 0.7×	252 2.5×	27 0.3×	62 0.7×	7	362
Yuka Iwamoto Japan	11	29 0.1×	318 2.8×	75 0.8×	26 0.3×	258 3.1×	17	634
Cheng-Hao Chien Taiwan	11	134 0.6×	186 1.6×	37 0.4×	44 0.5×	50 0.6×	17	517
Otto F. Schanne Canada	12	55 0.2×	204 1.8×	13 0.1×	90 1.1×	160 1.9×	44	493

Countries citing papers authored by Masashi Usa

Since Specialization

Citations

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

Fields of papers citing papers by Masashi Usa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Masashi Usa

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

Devaraj, B., Kin Pui Chan, Masashi Usa, et al.. (2005). Spectroscopic measurement of transmission characteristics of tissue-like phantoms. is 11. 126–126. 1 indexed citations

Enomoto, Masaru, B. Devaraj, Masaki Kobayashi, et al.. (1998). Studies on Laser Computed Tomography Measurements of Human Teeth using Coherent Detection Imaging Method. Nippon Laser Igakkaishi. 19(1). 1–12. 1 indexed citations

Takeda, Motohiro, Masaki Kobayashi, Masashi Usa, et al.. (1998). A novel method of assessing carcinoma cell proliferation by biophoton emission. Cancer Letters. 127(1-2). 155–160. 48 indexed citations

Sasaki, Yoshihiko, Masashi Usa, B. Devaraj, Makoto Yamada, & Humio Inaba. (1998). Noninvasive spectroscopic computed tomography of plants in situ using near infrared lasers. 194. ATuD28–ATuD28. 1 indexed citations

Devaraj, B., Yuuki Watanabe, Hiroshi Ishihata, et al.. (1996). Laser Computed Tomographic Images of Bones and Teeth by Coherent Detection Imaging in the Visible and Near-IR Regions. 21. CIT214–CIT214. 1 indexed citations

Devaraj, B., M. Kobayashi, Masashi Usa, et al.. (1996). In vivo laser computed tomographic imaging of human fingers by coherent detection imaging method using different wavelengths in near infrared region. Applied Physics Letters. 69(24). 3671–3673. 24 indexed citations

Devaraj, B., Masashi Usa, Kin Pui Chan, T. Akatsuka, & Humio Inaba. (1996). Recent advances in coherent detection imaging (CDI) in biomedicine: laser tomography of human tissues in vivo and in vitro. IEEE Journal of Selected Topics in Quantum Electronics. 2(4). 1008–1016. 34 indexed citations

Inaba, Humio & Masashi Usa. (1995). Ultraweak Photon Emission from Living States -Biophoton Imaging and Biophotonic Information Detection-. 13(1). 23–32. 2 indexed citations

Amano, Toshiyasu, Masaki Kobayashi, B. Devaraj, Masashi Usa, & Humio Inaba. (1995). Ultraweak biophoton emission imaging of transplanted bladder cancer. Urological Research. 23(5). 315–318. 39 indexed citations

10.

Kobayashi, Masaki, Masashi Usa, & Humio Inaba. (1994). Highly Sensitive Detection and Spectral Analysis of Ultraweak Photon Emission from Living Samples of Human Origin for the Measurement of Biomedical Information. Transactions of the Society of Instrument and Control Engineers. 30(4). 385–391. 10 indexed citations

11.

Usa, Masashi, B. Devaraj, Masato I. N. Kobayashi, et al.. (1994). Detection and characterization of ultraweak biophotons from life processes. 8 indexed citations

12.

Godlewski, M., Zenon Rajfur, Janusz Sławiński, et al.. (1993). Spectra of the formaldehyde-induced ultraweak luminescence from yeast cells. Journal of Photochemistry and Photobiology B Biology. 21(1). 29–35. 7 indexed citations

13.

Watanabe, Haruo, et al.. (1992). Weak chemiluminescence of bilirubin and its stimulation by aldehydes. Journal of Bioluminescence and Chemiluminescence. 7(1). 1–11. 7 indexed citations

14.

Watanabe, Haruo, et al.. (1992). Chemiluminescence in the crude extracts of soybean seedlings. Postulated mechanism on the formation of hydroperoxide intermediates. Biochimica et Biophysica Acta (BBA) - General Subjects. 1117(2). 107–113. 6 indexed citations

15.

Watanabe, Haruo, et al.. (1991). Analysis of synchronous photon emissions from the bacterium Photobacterium phosphoreum during colony formation from a single cell. Journal of Bioluminescence and Chemiluminescence. 6(1). 13–18. 4 indexed citations

16.

Watanabe, Haruo, et al.. (1991). Aldehyde-enhanced photon emission from crude extracts of soybean seedlings. Biochimica et Biophysica Acta (BBA) - Bioenergetics. 1058(2). 209–216. 15 indexed citations

17.

Usa, Masashi & Humio Inaba. (1990). Simultaneous measurements of EEG and ultraweak biophoton emission originating from human body surface.. Seibutsu Butsuri. 30(5). 259–262.

18.

Kobayashi, Masaki, et al.. (1989). Low-level chemiluminescence of water-imbibed soybean seeds.. Agricultural and Biological Chemistry. 53(12). 3311–3312. 6 indexed citations

19.

Kobayashi, Masaki, et al.. (1989). Low-level Chemiluminescence of Water-imbibed Soybean Seeds. Agricultural and Biological Chemistry. 53(12). 3311–3312. 4 indexed citations

20.

Usa, Masashi, et al.. (1989). Simultaneous measurement of biophoton emission and biosurface electric potential from germinating soybean (Glycine max). PROTOPLASMA. 149(1). 64–66. 15 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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