Karen L. Johnson

1.8k total citations
95 papers, 1.3k citations indexed

About

Karen L. Johnson is a scholar working on Radiology, Nuclear Medicine and Imaging, Surgery and General Health Professions. According to data from OpenAlex, Karen L. Johnson has authored 95 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 50 papers in Radiology, Nuclear Medicine and Imaging, 12 papers in Surgery and 12 papers in General Health Professions. Recurrent topics in Karen L. Johnson's work include Medical Imaging Techniques and Applications (48 papers), Advanced MRI Techniques and Applications (36 papers) and Cardiac Imaging and Diagnostics (21 papers). Karen L. Johnson is often cited by papers focused on Medical Imaging Techniques and Applications (48 papers), Advanced MRI Techniques and Applications (36 papers) and Cardiac Imaging and Diagnostics (21 papers). Karen L. Johnson collaborates with scholars based in United States, United Kingdom and France. Karen L. Johnson's co-authors include Michael A. King, P. Hendrik Pretorius, J. LeMoigne, Ilya Zavorin, Arlene Cole-Rhodes, Yongyi Yang, Miles N. Wernick, Paul A. Kearney, Steven B. Johnson and Joyoni Dey and has published in prestigious journals such as Annals of the New York Academy of Sciences, IEEE Transactions on Image Processing and Critical Care Medicine.

In The Last Decade

Karen L. Johnson

88 papers receiving 1.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Karen L. Johnson United States 18 448 226 210 199 177 95 1.3k
Michael Czaplik Germany 26 202 0.5× 225 1.0× 75 0.4× 545 2.7× 164 0.9× 110 1.7k
Jaehoon Oh South Korea 19 102 0.2× 222 1.0× 102 0.5× 118 0.6× 98 0.6× 104 1.1k
Zui‐Shen Yen Taiwan 19 52 0.1× 201 0.9× 30 0.1× 125 0.6× 281 1.6× 45 1.6k
Jeffrey Lubin United States 16 112 0.3× 161 0.7× 290 1.4× 93 0.5× 33 0.2× 66 837
Stefan J. Schaller Germany 31 1.3k 2.9× 693 3.1× 82 0.4× 933 4.7× 967 5.5× 138 3.5k
Paul B. McBeth Canada 24 236 0.5× 538 2.4× 51 0.2× 242 1.2× 440 2.5× 76 1.6k
Roger D. Dias United States 19 95 0.2× 30 0.1× 63 0.3× 119 0.6× 32 0.2× 84 1.0k
Haim Berkenstadt Israel 28 194 0.4× 240 1.1× 24 0.1× 382 1.9× 254 1.4× 113 2.7k
Joy Conway United Kingdom 30 120 0.3× 1.8k 8.2× 20 0.1× 229 1.2× 225 1.3× 89 3.2k
Timothy R. Spencer United Kingdom 21 630 1.4× 350 1.5× 344 1.6× 153 0.8× 76 0.4× 57 1.7k

Countries citing papers authored by Karen L. Johnson

Since Specialization
Citations

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

Fields of papers citing papers by Karen L. Johnson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karen L. Johnson. 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 Karen L. Johnson. The network helps show where Karen L. Johnson may publish in the future.

Co-authorship network of co-authors of Karen L. Johnson

This figure shows the co-authorship network connecting the top 25 collaborators of Karen L. Johnson. A scholar is included among the top collaborators of Karen L. Johnson 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 Karen L. Johnson. Karen L. Johnson 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.
Chen, Xiongchao, P. Hendrik Pretorius, Bo Zhou, et al.. (2022). Cross-vender, cross-tracer, and cross-protocol deep transfer learning for attenuation map generation of cardiac SPECT. Journal of Nuclear Cardiology. 29(6). 3379–3391. 19 indexed citations
2.
Bay, R. Curtis, et al.. (2019). Travel Nurse Onboarding. JONA The Journal of Nursing Administration. 49(9). 436–440. 7 indexed citations
3.
Song, Chao, Yongyi Yang, Miles N. Wernick, et al.. (2018). Improving perfusion defect detection with respiratory motion correction in cardiac SPECT at standard and reduced doses. Journal of Nuclear Cardiology. 26(5). 1526–1538. 5 indexed citations
4.
Hamlet, Claire, Nichola Rumsey, Heidi Williamson, Karen L. Johnson, & Charles Nduka. (2018). Consensus research priorities for facial palsy: A Delphi survey of patients, carers, clinicians and researchers. Journal of Plastic Reconstructive & Aesthetic Surgery. 71(12). 1777–1784. 18 indexed citations
5.
Yang, Yongyi, et al.. (2018). Personalized Models for Injected Activity Levels in SPECT Myocardial Perfusion Imaging. IEEE Transactions on Medical Imaging. 38(6). 1466–1476. 7 indexed citations
6.
7.
Yang, Yongyi, P. Hendrik Pretorius, Piotr J. Slomka, et al.. (2017). Investigation of dose reduction in cardiac perfusion SPECT via optimization and choice of the image reconstruction strategy. Journal of Nuclear Cardiology. 25(6). 2117–2128. 37 indexed citations
8.
Yang, Yongyi, P. Hendrik Pretorius, Piotr J. Slomka, et al.. (2016). Dose optimization of SPECT-MPI reconstruction algorithms for perfusion-defect detection. 1–3. 2 indexed citations
9.
10.
11.
Johnson, Karen L., et al.. (2010). Safe Intrahospital Transport of Critically Ill Obese Patients. Bariatric Nursing and Surgical Patient Care. 5(1). 65–70. 3 indexed citations
12.
Lee, Anthony, et al.. (2010). Computerisation of a paper-based intravenous insulin protocol reduces errors in a prospective crossover simulated tight glycaemic control study. Intensive and Critical Care Nursing. 26(3). 161–168. 14 indexed citations
13.
Johnson, Karen L., et al.. (2010). Quantitative Study of Rigid-Body and Respiratory Motion of Patients Undergoing Stress and Rest Cardiac SPECT Imaging. IEEE Transactions on Nuclear Science. 57(3). 1105–1115. 15 indexed citations
14.
Johnson, Karen L., et al.. (2009). Evaluation report: UNIFEM'sd work on gender-responsive budgeting: Gender-responsive budgeting programme: Morocco. Data Archiving and Networked Services (DANS).
15.
Pretorius, P. Hendrik, et al.. (2009). A flexible multicamera visual‐tracking system for detecting and correcting motion‐induced artifacts in cardiac SPECT slices. Medical Physics. 36(5). 1913–1923. 49 indexed citations
16.
Solano, Mauricio, et al.. (2008). Evaluation of technetium Tc 99m–labeled biotin for scintigraphic detection of soft tissue inflammation in horses. American Journal of Veterinary Research. 69(5). 639–646. 2 indexed citations
17.
Johnson, Karen L., et al.. (2007). Estimation of rigid-body and respiratory motion of the heart for SPECT motion correction. 45. 3570–3576. 11 indexed citations
18.
Johnson, Karen L.. (2007). Neuromuscular Complications in the Intensive Care Unit. AACN Advanced Critical Care. 18(2). 167–182. 2 indexed citations
19.
Solano, Mauricio, et al.. (2005). EFFECTS OF ACEPROMAZINE ON THREE‐PHASE99mTc‐MDP BONE IMAGING IN 11 HORSES. Veterinary Radiology & Ultrasound. 46(5). 437–442. 2 indexed citations
20.
Johnson, Karen L. & Michael Jensen. (1996). ARM: ARSCL: multiple outputs from first Clothiaux algorithms on Vaisala or Belfort ceilometers, Micropulse lidar, and MMCR. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information). 6 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Michael Czaplik Breakdown of academic impact, for papers by Jaehoon Oh Breakdown of academic impact, for papers by Zui‐Shen Yen Breakdown of academic impact, for papers by Jeffrey Lubin Breakdown of academic impact, for papers by Stefan J. Schaller Breakdown of academic impact, for papers by Paul B. McBeth Breakdown of academic impact, for papers by Roger D. Dias Breakdown of academic impact, for papers by Haim Berkenstadt Breakdown of academic impact, for papers by Joy Conway Breakdown of academic impact, for papers by Timothy R. Spencer
Rankless by CCL
2026