Wojtek Zbijewski, Ph.D., M.S.

Wojciech Bartosz Zbijewski, Ph.D., M.S.

  • Associate Professor of Biomedical Engineering

Research Interests

Quantitative imaging; high-resolution imaging; orthopedic imaging; bone microstructure; X-ray CT; CT system modeling and optimization; CT reconstruction; Monte Carlo methods ...read more


Dr. Wojtek Zbijewski is an Assistant Professor of biomedical engineering at the Johns Hopkins University School of Medicine.

Dr. Zbijewski is leading a research program that focuses on development algorithms and devices for quantitative imaging, in particular using x-ray radiography and Computed Tomography (CT). Examples of recent work include performance optimization of 2D and 3D imaging trajectories for novel robotic x-ray systems, new technologies for ultra-high resolution CT (x-ray detectors, imaging system design, and image formation algorithms), dual-energy techniques for orthopedic Cone Beam CT, and quantitative shape analysis in applications ranging from orthopedics to 3D microscopy of human tumor samples.

Dr. Zbijewski received his M.S. in physics from the University of Warsaw, Poland, and his Ph.D. at the Imaging Sciences Institute, University of Utrecht, The Netherlands. He is currently affiliated with the Carnegie Center for Surgical Innovation and the I-STAR Labs.

His background includes the development of statistical reconstruction algorithms for x-ray CT and scatter correction methods for cone-beam CT using accelerated Monte Carlo techniques. His experience includes industrial R&D, where his work involved the design of specialized cone-beam CT systems for image-guided surgery, ENT, and dental applications.

...read more


  • Associate Professor of Biomedical Engineering

Departments / Divisions



  • M.S.; University of Warsaw (Poland) (2001)
  • Ph.D.; Utrecht University (The Netherlands) (2006)

Research & Publications

Research Summary

Dr. Zbijewski leads a research program in development of technologies for quantitative imaging. Particular areas of interest include x-ray system design and optimization, algorithms for image formation and quantitative image analysis, and clinical applications of high-resolution imaging.


Lab Website: Imaging for Surgery, Therapy and Radiology (I-STAR) Lab

Selected Publications

W. Zbijewski, F. J. Beekman, “Efficient Monte Carlo based scatter artifact reduction in cone-beam micro-CT,” IEEE Trans. Medical Imaging, 25(7): 817–827, 2006.

W. Zbijewski, P. De Jean, P. Prakash, Y. Ding, J. W. Stayman, N. Packard, R. Senn,D. Yang, J. Yorkston, A. Machado, J. A. Carrino, J.H. Siewerdsen, “A Dedicated Cone-Beam CT System for Musculoskeletal Extremities Imaging: Design, Optimization, and Initial Performance Characterization,” Med. Phys., 38(8): 4700–13, 2011

A. Sisniega, J. W. Stayman, J. Yorkston, J. H. Siewerdsen, W. Zbijewski, "Motion compensation in extremity cone-beam CT using a penalized image sharpness criterion," Phys. Med. Biol., 62(9): 3712, 2017. PMID: 28327471, PMCID: PMC5478238

Q. Cao, A, Sisniega, M. Brehler, JW. Stayman J. Yorkston, J.H. Siewerdsen, W. Zbijewski, "Modeling and Evaluation of a High-Resolution CMOS Detector for Cone-Beam CT of the Extremities", Medical Physics 45, 114–130, 2018. PMCID: PMC5774240

M. Brehler, G. Thawait, J. Kaplan, J. Ramsay, M. J. Tanaka, S. Demehri, J. H. Siewerdsen, W. ZbijewskiAtlas-based algorithm for automatic anatomical measurements in the knee, J Med Imaging 6(2):026002, 2019.PMCID: PMC6582228

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