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Casey Johnson, PhD

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Research Associate
2-150 CMRR
612-625-6085
casey@cmrr.umn.edu

I am developing new MRI methods for musculoskeletal applications, with a particular emphasis on the hip joint. These developments include in vivo imaging at 3T and 7T and ex vivo imaging at 9.4T. I am investigating a number of new sequences to perform comprehensive imaging of the pediatric and young adult hip, including detection of early cartilage and bone damage that may lead to osteoarthritis. I am also involved in projects focusing on the knee, spine, and shoulder. This work is done in collaboration with investigators at CMRR as well as colleagues in veterinary medicine, orthopaedic surgery, physical therapy, and engineering. Prior to joining CMRR in July 2015, I had developed MRI techniques for time-resolved contrast-enhanced MR angiography (Mayo Clinic) and psychiatric neuroimaging (University of Iowa).

Research Interests:

  • Quantitative mapping of MR relaxation times as an early marker of disease
  • Acceleration techniques for high spatial and temporal resolution
  • Efficient methods for 3D imaging
  • Ultrahigh field (7T+) techniques and applications

Selected Publications:

Johnson CP, Wang L, Tóth F, Aruwajoye O, Carlson CS, Kim HK, Ellermann JM. Quantitative MRI detects hip ischemia: preclinical model of Legg-Calvé-Perthes disease. Radiology 2018 (in press).

Johnson CP, Van de Moortele PF, Wang L, Ugurbil K, Ellermann JM. Chapter 24: Ultrahigh-field whole-body MRI for cartilage imaging: technical challenges. Biophysics and Biochemistry of Cartilage by NMR and MRI. Eds: Xia Y, Momot K. The Royal Society of Chemistry, Cambridge, UK 2016, 671-705.

Johnson CP, Christensen GE, Fiedorowicz JG, Shaffer JJ, Mani M, Magnotta VA, Wemmie JA. Alterations of the cerebellum and basal ganglia in bipolar disorder mood states detected by quantitative T1ρ mapping. Bipolar Disord 2018 (epub).

Johnson CP, Folmer RL, Oguz I, Warren L, Christensen GE, Fiedorowicz JG, Magnotta VA, Wemmie JA. Brain abnormalities in bipolar disorder detected by quantitative T1ρ mapping. Mol Psychiatry 2015; 20(2):201-206.

Johnson CP, Thedens DR, Magnotta VA. Precision-guided sampling schedules for efficient T1ρ mapping. J Magn Reson Imaging 2015; 41(1):242-250.

Johnson CP, Heo HY, Thedens DR, Wemmie JA, Magnotta VA. Rapid acquisition strategy for functional T1ρ imaging of the brain. Magn Reson Imaging 2014; 32(9):1067-1164.

Johnson CP, Weavers PT, Borisch EA, Grimm RC, Hulshizer RC, LaPlante CC, Rossman PJ, Glockner JF, Young PM, Riederer SJ. Three-station three-dimensional bolus-chase MR angiography with real-time fluoroscopic tracking. Radiology 2014; 272(1):241-251.

Johnson CP, Polley TW, Glockner JF, Young PM, Riederer SJ. Buildup of image quality in view-shared time-resolved 3D CE-MRA. Magn Reson Med 2013; 70(2):348-357.

Johnson CP, Borisch EA, Glockner JF, Young PM, Riederer SJ. Time-resolved dual-station calf-foot three-dimensional bolus chase MR angiography with fluoroscopic tracking. J Magn Reson Imaging 2012; 36(5):1168-1178.

Johnson CP, Haider CR, Borisch EA, Glockner JF, Riederer SJ. Time-resolved bolus-chase MR angiography with real-time triggering of table motion. Magn Reson Med 2010; 64(3):629-637.

All publications (Google Scholar profile)