Scholars@Duke

• Background
• 

  Education, Training, & Certifications

  • M.D., Loyola University at Chicago 2001
• 

  Duke Appointment History

  • Assistant Professor of Radiology, Radiology, Breast Imaging, Radiology 2013 - 2019
  • Medical Instructor in the Department of Radiology, Radiology, Breast Imaging, Radiology 2008 - 2013
  • Clinical Associate in the Department of Radiology, Radiology, Breast Imaging, Radiology 2006 - 2007
  • Instructor, Temporary in the Department of Radiology, Radiology, Breast Imaging, Radiology 2006
• 

  Leadership & Clinical Positions at Duke

  • Residency Program Director, Diagnostic Radiology     2016-present
• Publications & Artistic Works
• 

  Selected Publications

  • Academic Articles

    • Maxfield, Charles M., Matthew P. Thorpe, Terry S. Desser, Darel E. Heitkamp, Nathan C. Hull, Karen S. Johnson, Nicholas A. Koontz, Gary W. Mlady, Timothy J. Welch, and Lars J. Grimm. “Bias in Radiology Resident Selection: Do We Discriminate Against the Obese and Unattractive?.” Acad Med 94, no. 11 (November 2019): 1774–80. https://doi.org/10.1097/ACM.0000000000002813.
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    • Pamarthi, Vishwan, Lars Grimm, Karen Johnson, and Charles Maxfield. “Hybrid Interactive and Didactic Teaching Format Improves Resident Retention and Attention Compared to Traditional Lectures..” Acad Radiol 26, no. 9 (September 2019): 1269–73. https://doi.org/10.1016/j.acra.2019.02.018.
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    • Dixon, Austin, Karen Johnson, Leah Strickland, Bhavik Patel, and Nicholas Said. “Assessing the Effectiveness of a Health Care Economics Curriculum for Radiology Residents..” J Am Coll Radiol 16, no. 8 (August 2019): 1083–87. https://doi.org/10.1016/j.jacr.2018.12.040.
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    • Johnson, K., J. Chang-Claude, A. -. M. Critchley, C. Kyriacou, S. Lavers, T. Rattay, P. Seibold, et al. “Genetic Variants Predict Optimal Timing of Radiotherapy to Reduce Side-effects in Breast Cancer Patients..” Clin Oncol (R Coll Radiol) 31, no. 1 (January 2019): 9–16. https://doi.org/10.1016/j.clon.2018.10.001.
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    • Goldman, Daryl T., Gail L. Peters, Aaron M. Fischman, George G. Vatakencherry, Peter R. Bream, Jonathan G. Martin, Janice M. Newsome, et al. “Best Practices From the APDR: Improving Medical Student Exposure to Interventional Radiology..” Acad Radiol 25, no. 6 (June 2018): 789–91. https://doi.org/10.1016/j.acra.2017.11.021.
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    • Grimm, Lars J., Neal K. Viradia, and Karen S. Johnson. “Normal Axillary Lymph Node Variability Between White and Black Women on Breast MRI..” Acad Radiol 25, no. 3 (March 2018): 305–8. https://doi.org/10.1016/j.acra.2017.10.007.
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    • Perlman, Katherine L., Rebecca A. Shelby, Anava A. Wren, Sarah A. Kelleher, Caroline S. Dorfman, Erin O’Connor, Connie Kim, Karen S. Johnson, and Mary Scott Soo. “Positive and negative mood following imaging-guided core needle breast biopsy and receipt of biopsy results..” Psychol Health Med 22, no. 10 (December 2017): 1149–62. https://doi.org/10.1080/13548506.2016.1271438.
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    • Grimm, Lars J., Jing Zhang, Jay A. Baker, Mary S. Soo, Karen S. Johnson, and Maciej A. Mazurowski. “Relationships Between MRI Breast Imaging-Reporting and Data System (BI-RADS) Lexicon Descriptors and Breast Cancer Molecular Subtypes: Internal Enhancement is Associated with Luminal B Subtype..” Breast J 23, no. 5 (September 2017): 579–82. https://doi.org/10.1111/tbj.12799.
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    • Grimm, Lars J., David Y. Johnson, Karen S. Johnson, Jay A. Baker, Mary Scott Soo, E Shelley Hwang, and Sujata V. Ghate. “Suspicious breast calcifications undergoing stereotactic biopsy in women ages 70 and over: Breast cancer incidence by BI-RADS descriptors..” Eur Radiol 27, no. 6 (June 2017): 2275–81. https://doi.org/10.1007/s00330-016-4617-7.
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    • Heitkamp, Darel E., Karen S. Johnson, Robert D. Suh, Harprit S. Bedi, Sandra A. A. Oldham, Christopher P. Ho, and Angelisa M. Paladin. “Sustaining Change in Radiology Education: The Need for Universal Curricula..” J Am Coll Radiol 14, no. 6 (June 2017): 804–7. https://doi.org/10.1016/j.jacr.2017.02.047.
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    • Cho, Michael W., Lars J. Grimm, and Karen S. Johnson. “Focal Breast Pain: Does Breast Density Affect the Need for Ultrasound?.” Acad Radiol 24, no. 1 (January 2017): 53–59. https://doi.org/10.1016/j.acra.2016.09.004.
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    • Wang, M., J. Zhang, L. J. Grimm, S. V. Ghate, R. Walsh, K. S. Johnson, J. Y. Lo, and M. A. Mazurowski. “Predicting false negative errors in digital breast tomosynthesis among radiology trainees using a computer vision-based approach.” Expert Systems With Applications 56 (September 1, 2016): 1–8. https://doi.org/10.1016/j.eswa.2016.01.053.
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    • Soo, Mary Scott, Jennifer A. Jarosz, Anava A. Wren, Adrianne E. Soo, Yvonne M. Mowery, Karen S. Johnson, Sora C. Yoon, et al. “Imaging-Guided Core-Needle Breast Biopsy: Impact of Meditation and Music Interventions on Patient Anxiety, Pain, and Fatigue..” J Am Coll Radiol 13, no. 5 (May 2016): 526–34. https://doi.org/10.1016/j.jacr.2015.12.004.
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    • Grimm, Lars J., Jing Zhang, Joseph Y. Lo, Karen S. Johnson, Sujata V. Ghate, Ruth Walsh, and Maciej A. Mazurowski. “Radiology Trainee Performance in Digital Breast Tomosynthesis: Relationship Between Difficulty and Error-Making Patterns..” J Am Coll Radiol 13, no. 2 (February 2016): 198–202. https://doi.org/10.1016/j.jacr.2015.09.025.
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    • Mazurowski, Maciej A., Lars J. Grimm, Jing Zhang, P Kelly Marcom, Sora C. Yoon, Connie Kim, Sujata V. Ghate, and Karen S. Johnson. “Recurrence-free survival in breast cancer is associated with MRI tumor enhancement dynamics quantified using computer algorithms..” Eur J Radiol 84, no. 11 (November 2015): 2117–22. https://doi.org/10.1016/j.ejrad.2015.07.012.
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    • Grimm, Lars J., Mary S. Soo, Sora Yoon, Connie Kim, Sujata V. Ghate, and Karen S. Johnson. “Abbreviated screening protocol for breast MRI: a feasibility study..” Acad Radiol 22, no. 9 (September 2015): 1157–62. https://doi.org/10.1016/j.acra.2015.06.004.
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    • Grimm, Lars J., Andy L. Anderson, Jay A. Baker, Karen S. Johnson, Ruth Walsh, Sora C. Yoon, and Sujata V. Ghate. “Frequency of Malignancy and Imaging Characteristics of Probably Benign Lesions Seen at Breast MRI..” Ajr Am J Roentgenol 205, no. 2 (August 2015): 442–47. https://doi.org/10.2214/AJR.14.13530.
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    • Johnson, Karen, Deba Sarma, and E Shelley Hwang. “Lobular breast cancer series: imaging..” Breast Cancer Res 17 (July 11, 2015). https://doi.org/10.1186/s13058-015-0605-0.
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    • Zhang, Jing, Lars J. Grimm, Joseph Y. Lo, Karen S. Johnson, Sujata V. Ghate, Ruth Walsh, and Maciej A. Mazurowski. “Does Breast Imaging Experience During Residency Translate Into Improved Initial Performance in Digital Breast Tomosynthesis?.” J Am Coll Radiol 12, no. 7 (July 2015): 728–32. https://doi.org/10.1016/j.jacr.2015.02.025.
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    • Grimm, Lars J., Andy L. Anderson, Jay A. Baker, Karen S. Johnson, Ruth Walsh, Sora C. Yoon, and Sujata V. Ghate. “Interobserver Variability Between Breast Imagers Using the Fifth Edition of the BI-RADS MRI Lexicon..” Ajr Am J Roentgenol 204, no. 5 (May 2015): 1120–24. https://doi.org/10.2214/AJR.14.13047.
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    • Grimm, Lars J., Karen S. Johnson, P Kelly Marcom, Jay A. Baker, and Mary S. Soo. “Can breast cancer molecular subtype help to select patients for preoperative MR imaging?.” Radiology 274, no. 2 (February 2015): 352–58. https://doi.org/10.1148/radiol.14140594.
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    • Johnson, K., D. Sarma, and E. S. Hwang. “Lobular breast cancer series: Imaging.” Breast Cancer Research 17, no. 1 (2015). https://doi.org/10.1186/s13058-015-0605-0.
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    • Soo, Adrianne E., Rebecca A. Shelby, Lauren S. Miller, Melissa Hayes Balmadrid, Karen S. Johnson, Anava A. Wren, Sora C. Yoon, Francis J. Keefe, and Mary Scott Soo. “Predictors of pain experienced by women during percutaneous imaging-guided breast biopsies..” J Am Coll Radiol 11, no. 7 (July 2014): 709–16. https://doi.org/10.1016/j.jacr.2014.01.013.
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    • Johnson, Karen S., Jay A. Baker, Sheila S. Lee, and Mary Scott Soo. “Cancelation of MRI guided breast biopsies for suspicious breast lesions identified at 3.0 T MRI: reasons, rates, and outcomes..” Acad Radiol 20, no. 5 (May 2013): 569–75. https://doi.org/10.1016/j.acra.2013.01.005.
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    • Johnson, Karen S., Rex C. Bentley, P. Kelly Marcom, and Jay A. Baker. “Pseudoangiomatous stromal hyperplasia (PASH) causing massive breast enlargement: MRI findings..” Breast J 18, no. 6 (November 2012): 600–601. https://doi.org/10.1111/tbj.12026.
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    • Johnson, Karen S., Jay A. Baker, Sheila S. Lee, and Mary S. Soo. “Suspicious breast lesions detected at 3.0 T magnetic resonance imaging: clinical and histological outcomes..” Acad Radiol 19, no. 6 (June 2012): 667–74. https://doi.org/10.1016/j.acra.2012.02.016.
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    • Ghate, Sujata V., Jay A. Baker, Connie E. Kim, Karen S. Johnson, Ruth Walsh, and Mary Scott C. Soo. “Using the BI-RADS lexicon in a restrictive form of double reading as a strategy for minimizing screening mammography recall rates..” Ajr Am J Roentgenol 198, no. 4 (April 2012): 962–70. https://doi.org/10.2214/AJR.11.6648.
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    • Khati, Nadia, Tammy Adamson, Karen S. Johnson, and Michael C. Hill. “Ultrasound of the thyroid and parathyroid glands..” Ultrasound Q 19, no. 4 (December 2003): 162–76. https://doi.org/10.1097/00013644-200312000-00002.
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  • Conference Papers

    • Wang, M., J. Zhang, L. J. Grimm, S. V. Ghate, R. Walsh, K. S. Johnson, J. Y. Lo, and M. A. Mazurowski. “Identification of error making patterns in lesion detection on digital breast tomosynthesis using computer-extracted image features.” In Progress in Biomedical Optics and Imaging  Proceedings of Spie, Vol. 9787, 2016. https://doi.org/10.1117/12.2201061.
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    • Grimm, L. J., J. Zhang, K. S. Johnson, J. Y. Lo, and M. A. Mazurowski. “Incorporating breast tomosynthesis into radiology residency: Does trainee experience in breast imaging translate into improved performance with this new modality?.” In Progress in Biomedical Optics and Imaging  Proceedings of Spie, Vol. 9416, 2015. https://doi.org/10.1117/12.2082810.
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