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

Photo of Dr. Wojciech Bartosz Zbijewski, M.D., Ph.D.

Assistant Professor of Biomedical Engineering

Research Interests: X-ray CT; CT system modeling; CT reconstruction; Monte Carlo methods


Dr. Wojciech Bartosz Zbijewski is an instructor of biomedical engineering at the Johns Hopkins University School of Medicine. Dr. Zbijewski is a physicist whose research focuses on x-ray CT image reconstruction, Monte Carlo modeling, and the development and novel imaging systems to improving resolution for determining bone health. 

He leads imaging system instrumentation activities at the Johns Hopkins I-STAR Lab, including cone-beam CT, photon counting CT, and advanced volumetric imaging for extremities imaging in musculoskeletal radiology, orthopaedics, and rheumatology. 

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. 

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. more


  • Assistant Professor of Biomedical Engineering

Departments / Divisions



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

Research & Publications

Research Summary

As a research associate for the physics of medical imaging, Dr. Zbijewski’s focus is on system modeling for optimizing X-ray CT imaging and the integration of novel image reconstruction algorithms. His particular areas of interest are: 1) improving the task-based optimization of image quality through numerical models; 2) advanced physics modeling in statistical reconstruction; 3) accelerated Monte Carlo methods in CT imaging, and 4) experimental validation of approaches and applications to the development of novel imaging devices.

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

Selected Publications

G. Gang, W. Zbijewski, J. W. Stayman, J. H. Siewerdsen, "Cascaded Systems Analysis of Noise and Detectability in Dual-Energy Cone-Beam CT," Medical Physics, 39 (8), 5145–5156, 2012

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

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.

A. P. Colijn, W. Zbijewski, A. Sasov and F. J. Beekman, "Experimental validation of a rapid Monte Carlo based Micro-CT simulator," Phys. Med. Biol., 49(18): 4321–4333, 2004.

W. Zbijewski, F. J. Beekman, "Characterization and suppression of edge and aliasing artifacts in iterative X-ray CT reconstruction," Phys. Med. Biol., 49(1): 145–147, 2004.

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