Associate Professor of Engineering
Adjunct Associate Professor of Surgery, Geisel School of Medicine
Associate Professor of Engineering
- B.Sc. Materials Science, Shanghai Jiaotong University 1996
- M.S. Computer Science, Washington University in St. Louis 2003
- D.Sc. Mechanical Engineering, Washington University in St. Louis 2003
Image-guided surgery; medical imaging; multi-modality imaging; image analysis; finite element; numerical methods; image registration; traumatic brain injury; computational modeling of the human head
Current Research Projects
- Image-guided neurosurgery
- Measuring material properties of the human brain in vivo
- Traumatic brain injury in college athletes
Surgical Image Guidance
- S. Ji, X. Fan, D.W. Roberts, K.D. Paulsen. Efficient Stereo Image Geometrical Reconstruction at Arbitrary Camera Settings from a Single Calibration. In: Barillot, C., Golland, P., Hornegger, J., Howe R. (eds.) MICCAI 2014, (Oral presentation; at a rate of ~4.00%, 36/~900)
- S. Ji, X. Fan, D.W. Roberts, A. Hartov, Timothy J. Schaewe, David A. Simon, and K.D. Paulsen. (2014) "Brain Shift Compensation via Intraoperative Imaging and Data Assimilation", in CRC Handbook of Imaging in Biological Mechanics, CRC Press and Taylor & Francis, Editors: Corey Neu and Guy Genin (in press).
- S. Ji, X. Fan, D.W. Roberts, A. Hartov, K.D. Paulsen, “Flow-based Correspondence Matching in Stereovision”, G. Wu et al. (Eds.): Machine Learning in Medical Imaging, LNCS 8184, pp. 106–113, 2013.
- S. Ji, D.W. Roberts, A. Hartov, and K.D. Paulsen. Intraoperative patient registration using volumetric true 3D ultrasound without fiducials, Medical Physics. 39(12), 7540–7552, (2012).
- S. Ji, X. Fan, A. Hartov, D.W. Roberts, and K.D. Paulsen. "Estimation of intraoperative brain deformation", in Studies in Mechanobiology, Tissue Engineering and Biomaterials, Volume 11, 97–133, Y. Payan (Ed.), Springer-Verlag Berlin Heidelberg, 2012. DOI: 10.1007/8415_2012_129
- S. Ji, X. Fan, D.W. Roberts, K.D. Paulsen, Cortical surface strain estimation using stereovision. In: Fichtinger, G., Martel, A., Peters, T. (eds.) MICCAI 2011, Part I. LNCS, vol. 6891, pp. 412–419. Springer, Berlin (2011) (Oral presentation; at a rate of 4.15%, 34/819)
Traumatic Brain Injury
- S. Ji, W. Zhao, J.C. Ford, J.G. Beckwith, R.P. Bolander, R.M. Greenwald, L.A. Flashman, K.D. Paulsen, T.W. McAllister. (2014) Group-wise evaluation and comparison of white matter fiber strain and maximum principal strain in sports-related concussion. Journal of Neurotrauma. doi/abs/10.1089/neu.2013.3268
- S. Ji, W. Zhao, Z. Li, T.W. McAllister. (2014) Head impact accelerations for brain strain-related responses in contact sports: a model-based investigation. Biomechanics and Modeling in Mechanobiology. DOI: 10.1007/s10237-014-0562-z
- S. Ji, H. Ghadyani, R.P. Bolander, J.G. Beckwith, J.C. Ford, T.W. McAllister, L.A. Flashman, K.D. Paulsen, K. Ernstrom, S. Jain, R. Raman, L. Zhang and R.M. Greenwald. Parametric Comparisons of Intracranial Mechanical Responses from Three Validated Finite Element Models of the Human Head. Annals of Biomedical Engineering, 42(1): 11–24, 2014. doi:10.1007/s10439-013-0907-2
- T.W. McAllister, J.C. Ford, S. Ji, J.G. Beckwith, L.A. Flashman, K.D. Paulsen, R.M. Greenwald. Maximum Principal Strain and Strain Rate Associated With Concussion Diagnosis Correlates With Changes in Corpus Callosum White Matter Indices. Annals of Biomedical Engineering 40(1):127-40, 2011. DOI: 10.1007/s10439-011-0402-6
- S. Ji, J.C. Ford, R.M. Greenwald, J.G. Beckwith, K.D. Paulsen, L.A. Flashman, T.W. McAllister, "Automated subject-specific, hexahedral mesh generation via image registration," Finite Elements in Analysis and Design, 47:1178–1185, 2011. [DOI: 10.1016/j.finel.2011.05.007].
- Use of stereovision for soft tissue deformation compensation (Application filed January 2012)
- Method and apparatus for calibration of stereo-optical three-dimensional surface-mapping system (Application filed January 2012)
- Apparatus for measuring in-vivo mechanical properties of biological tissues (Application filed September 2011)
- System and Method for Providing Registration Between Breast Shapes Before and During Surgery (Application filed February 2011)
- System and Method for Registering Ultrasound And Magnetic Resonance Images (Application filed November 2010)
- System and method for providing patient registration without fiducials (Application 20120215093)
Simbex extends partnership with Dartmouth Medical School, Thayer School on concussion research
September 15, 2011
Intel Teams Up with Leading Researchers to Make Football Helmets Safer
November 15, 2010
In Dartmouth Engineer Magazine
Dartmouth Engineering Postdoc Helps Surgeons Navigate the Brain
Web Extra, December 2013
Lab Report: Modeling the Impact of Brain Damage
Faculty News: New Profs Arrive
A post-doctoral associate position is available at Thayer School. This position will support research in image-guidance in spinal surgeries, using stereovision, ultrasound, as well as intraoperative MRI and CT. The goal of the project is to translate techniques established in the context of brain shift compensation in neurosurgery into open spinal surgery, and develop advanced technologies for surgical image-guidance and navigation. We have a dedicated research-oriented Center for Surgical Innovation (CSI), Advanced Imaging Center (AIC) equipped with state-of-the-art imaging and intraoperative imaging capabilities at Dartmouth-Hitchcock Medical Center. We offer the possibility to work in a relaxed environment on this exciting research project with the flexibility to realize his/her own ideas. The successful applicant is expected to work closely with other biomechanical engineers and clinicians. Work in human operating room environment is required.
Applicants are expected to have an earned Ph.D. degree in biomedical engineering, medical imaging, or a closely related field. Four years minimum experience with medical image analysis, preferably in MATLAB, is required. The post-doc associate will be expected to prepare research articles, present research findings at conference meetings, and contribute to grants. Therefore, excellent writing and communication skills are important.
Dartmouth College is an Ivy League institution. Our lab works closely with researchers in the Advanced Imaging Center, Center for Surgical Innovation, Dartmouth-Hitchcock Medical Center, as well as with other faculty in the engineering school and Geisel School of Medicine.
Interested applicants please send a cover letter, CV, and a list of 3 professional references to Songbai.Ji@Dartmouth.edu. This position will remain open until filled.
Qualifications: A Ph.D. in biomedical engineering, medical imaging, or a closely related field, with strong experience (4 years minimum) with MATLAB and medical image analysis.