James C. Ehrhardt

7.3k total citations · 1 hit paper
95 papers, 6.0k citations indexed

About

James C. Ehrhardt is a scholar working on Radiology, Nuclear Medicine and Imaging, Biomedical Engineering and Cognitive Neuroscience. According to data from OpenAlex, James C. Ehrhardt has authored 95 papers receiving a total of 6.0k indexed citations (citations by other indexed papers that have themselves been cited), including 57 papers in Radiology, Nuclear Medicine and Imaging, 14 papers in Biomedical Engineering and 13 papers in Cognitive Neuroscience. Recurrent topics in James C. Ehrhardt's work include Advanced MRI Techniques and Applications (26 papers), Cardiac Imaging and Diagnostics (15 papers) and Advanced Neuroimaging Techniques and Applications (13 papers). James C. Ehrhardt is often cited by papers focused on Advanced MRI Techniques and Applications (26 papers), Cardiac Imaging and Diagnostics (15 papers) and Advanced Neuroimaging Techniques and Applications (13 papers). James C. Ehrhardt collaborates with scholars based in United States, United Kingdom and Australia. James C. Ehrhardt's co-authors include William T. C. Yuh, Nancy C. Andreasen, Victor W. Swayze, Melvin L. Marcus, Daniel S. OʼLeary, François M. Abboud, Stephan Arndt, Randall Alliger, Ted Cizadlo and Donald D. Heistad and has published in prestigious journals such as Science, Circulation and Journal of Clinical Investigation.

In The Last Decade

James C. Ehrhardt

93 papers receiving 5.6k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Thalamic Abnormalities in Schizophrenia Visualized Through Magnetic Resonance Image Averaging

1994 575 citations Nancy C. Andreasen, Stephan Arndt et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
James C. Ehrhardt United States	40	2.8k	1.6k	1.1k	828	561	95	6.0k
M. E. Phelps United States	39	4.7k 1.7×	752 0.5×	721 0.6×	1.0k 1.2×	866 1.5×	78	7.5k
Jaap Valk Netherlands	42	1.7k 0.6×	1.0k 0.6×	1.6k 1.4×	378 0.5×	541 1.0×	116	6.8k
Pauli Vainio Finland	40	1.5k 0.5×	1.7k 1.1×	1.9k 1.7×	352 0.4×	992 1.8×	97	6.5k
Jyrki T. Kuikka Finland	44	1.3k 0.5×	949 0.6×	875 0.8×	1.0k 1.2×	1.4k 2.5×	227	5.8k
Hiroshi Ito Japan	53	3.0k 1.1×	1.5k 0.9×	1.1k 1.0×	701 0.8×	1.7k 3.0×	354	8.4k
Andrew M. Blamire United Kingdom	57	3.1k 1.1×	2.7k 1.7×	1.5k 1.3×	1.1k 1.4×	1.2k 2.2×	248	10.1k
Hannu J. Aronen Finland	57	4.1k 1.5×	3.0k 1.8×	994 0.9×	352 0.4×	503 0.9×	197	10.0k
Paul S. Morgan United Kingdom	49	2.8k 1.0×	2.1k 1.3×	582 0.5×	614 0.7×	606 1.1×	153	7.4k
Richard B. Buxton United States	47	4.5k 1.6×	3.4k 2.1×	449 0.4×	444 0.5×	661 1.2×	113	9.0k
Petra J. W. Pouwels Netherlands	58	4.0k 1.4×	1.4k 0.9×	545 0.5×	461 0.6×	622 1.1×	226	10.7k

Countries citing papers authored by James C. Ehrhardt

Since Specialization

Citations

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

Fields of papers citing papers by James C. Ehrhardt

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James C. Ehrhardt. 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 James C. Ehrhardt. The network helps show where James C. Ehrhardt may publish in the future.

Co-authorship network of co-authors of James C. Ehrhardt

This figure shows the co-authorship network connecting the top 25 collaborators of James C. Ehrhardt. A scholar is included among the top collaborators of James C. Ehrhardt 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 James C. Ehrhardt. James C. Ehrhardt is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Block, Robert I., Daniel S. OʼLeary, James C. Ehrhardt, et al.. (2000). Effects of frequent marijuana use on brain tissue volume and composition. Neuroreport. 11(3). 491–496. 134 indexed citations

Mayr, Nina A., James C. Ehrhardt, Joel I. Sorosky, et al.. (2000). Pixel analysis of MR perfusion imaging in predicting radiation therapy outcome in cervical cancer. Journal of Magnetic Resonance Imaging. 12(6). 1027–1033. 126 indexed citations

Magnotta, Vincent A., Nancy C. Andreasen, Ted Cizadlo, et al.. (1999). Measurement of Brain Structures with Artificial Neural Networks: Two- and Three-dimensional Applications. Radiology. 211(3). 781–790. 159 indexed citations

Yuh, William T. C., et al.. (1997). Pixel analysis of MR perfusion imaging in predicting treatment outcome in cervical cancer. International Journal of Radiation Oncology*Biology*Physics. 39. 298. 1 indexed citations

Mayr, Nina A., William T. C. Yuh, Jie Zheng, et al.. (1997). Tumor size evaluated by pelvic examination compared with 3-D MR quantitative analysis in the prediction of outcome for cervical cancer. International Journal of Radiation Oncology*Biology*Physics. 39(2). 395–404. 91 indexed citations

Ehrhardt, James C., et al.. (1997). Peripheral nerve stimulation in a whole‐body echo‐planar imaging system. Journal of Magnetic Resonance Imaging. 7(2). 405–409. 29 indexed citations

Andreasen, Nancy C., Rajaprabhakaran Rajarethinam, Stephan Arndt, et al.. (1996). Automatic Atlas-Based Volume Estimation of Human Brain Regions from MR Images. Journal of Computer Assisted Tomography. 20(1). 98–106. 282 indexed citations

Simonson, T. M., et al.. (1996). Echo-planar FLAIR imaging in evaluation of intracranial lesions.. Radiographics. 16(3). 575–584. 24 indexed citations

Mayr, Nina A., William T. C. Yuh, Vincent A. Magnotta, et al.. (1996). Tumor perfusion studies using fast magnetic resonance imaging technique in advanced cervical cancer: A new noninvasive predictive assay. International Journal of Radiation Oncology*Biology*Physics. 36(3). 623–633. 171 indexed citations

10.

Swayze, Victor W., Nancy C. Andreasen, Randall Alliger, William T. C. Yuh, & James C. Ehrhardt. (1992). Subcortical and temporal structures in affective disorder and schizophrenia: A magnetic resonance imaging study. Biological Psychiatry. 31(3). 221–240. 349 indexed citations

11.

Ehrhardt, James C., et al.. (1991). Extrusion of Eye socket magnetic implant after MR imaging: Potential hazard to patient with eye prosthesis. Journal of Magnetic Resonance Imaging. 1(6). 711–713. 14 indexed citations

12.

Fleagle, Steven R., Daniel R. Thedens, James C. Ehrhardt, Thomas Scholz, & David J. Skorton. (1991). Automated Identification of Left Ventricular Borders from Spin-Echo Magnetic Resonance Images Experimental and Clinical Feasibility Studies. Investigative Radiology. 26(4). 295–303. 43 indexed citations

13.

Yuh, William T. C., David J. Fisher, John D. Engelken, et al.. (1991). MR evaluation of CNS tumors: dose comparison study with gadopentetate dimeglumine and gadoteridol.. Radiology. 180(2). 485–491. 101 indexed citations

14.

Scholz, Thomas, David J. Fisher, James C. Ehrhardt, & David J. Skorton. (1991). Interventricular differences in myocardial T2 measurements: Experimental and clinical studies. Journal of Magnetic Resonance Imaging. 1(5). 513–520. 3 indexed citations

15.

Swayze, Victor W., Nancy C. Andreasen, James C. Ehrhardt, et al.. (1990). Developmental Abnormalities of the Corpus Callosum in Schizophrenia. Archives of Neurology. 47(7). 805–808. 99 indexed citations

16.

Ehrhardt, James C., et al.. (1989). Bacterial growth kinetics: modelling and evaluation of two-compartment radioassay. Canadian Journal of Microbiology. 35(9). 874–880. 1 indexed citations

17.

Ehrhardt, James C., Zhichao Tian, & Wei Chang. (1988). Reduced MR Acquisition Time with the CROCUS Technique. Journal of Computer Assisted Tomography. 12(3). 468–473. 3 indexed citations

18.

Verani, Mario S., et al.. (1978). Sensitivity and specificity of thallium-201 perfusion scintigrams under exercise in the diagnosis of coronary artery disease.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 19(7). 773–82. 110 indexed citations

19.

Ehrhardt, James C.. (1974). A CLINICIAN’S GUIDE TO THE MODULATION TRANSFER FUNCTION. Journal of Nuclear Medicine Technology. 2(4). 177–177. 1 indexed citations

20.

Ehrhardt, James C.. (1970). Analysis of the Atomic Spectrum of Gold.. PhDT. 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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