Ronald J. Callahan

63 papers and 2.5k indexed citations i.

About

Ronald J. Callahan is a scholar working on Radiology, Nuclear Medicine and Imaging, Pulmonary and Respiratory Medicine and Surgery. According to data from OpenAlex, Ronald J. Callahan has authored 63 papers receiving a total of 2.5k indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Radiology, Nuclear Medicine and Imaging, 19 papers in Pulmonary and Respiratory Medicine and 12 papers in Surgery. Recurrent topics in Ronald J. Callahan’s work include Radiopharmaceutical Chemistry and Applications (24 papers), Medical Imaging Techniques and Applications (17 papers) and Medical Imaging and Pathology Studies (10 papers). Ronald J. Callahan is often cited by papers focused on Radiopharmaceutical Chemistry and Applications (24 papers), Medical Imaging Techniques and Applications (17 papers) and Medical Imaging and Pathology Studies (10 papers). Ronald J. Callahan collaborates with scholars based in United States, Germany and The Netherlands. Ronald J. Callahan's co-authors include Alan J. Fischman, Jerry Froelich, K.A. McKusick, H W Strauss, Tilo Winkler, José G. Venegas, R. Scott Harris, Guido Musch, Marcos F. Vidal Melo and H. William Strausś and has published in prestigious journals such as Nature, New England Journal of Medicine and Circulation.

In The Last Decade

Co-authorship network of co-authors of Ronald J. Callahan i

Fields of papers citing papers by Ronald J. Callahan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ronald J. Callahan. 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 Ronald J. Callahan. The network helps show where Ronald J. Callahan may publish in the future.

Countries citing papers authored by Ronald J. Callahan

Since Specialization
Citations

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

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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2025