Shi Liu, PhD


Shi Liu, PhD, received his Bachelor and Master degrees in Computer Science from Harbin Institute of Technology (HIT) in 2010. He obtained his PhD in Optics at University College Dublin, Ireland, in 2014. His PhD research focused on optical imaging and its applications, image encryption, Raman spectroscopy, and 3D holographic image processing. He also spent 6 months as a visiting research fellow studying digital holography imaging in Technische Universitat limenau, Germany. In 2015, he moved to the United States and joined the Laboratory of Medical Imaging and Health Informatics in the Department of Radiation Oncolcoy in Washington University St. Louis as a postdoctoral research fellow. His research involves improving safety, quality, and efficiency of radiotherapy using health informatics, data mining and machine learning algorithms.

Dr. Liu joined the Stanford University Medical Physics Residency in 2017.


  • Yang D, Zhang M, Chang X, Fu Y, Liu S, Li H, Mutic S, et al. "A method to detect landmark pairs accurately between intra-patient volumetric medical images." Medical Physics (2017); In Press. 
  • Liu S, Mazur T, Yang D, et al. "Technical Note: A method to evaluate dosimetric effects on organs-at-risk for treatment delivery systematic uncertainties." Medical Physics. (2017); 4,1552-1557.
  • Liu S, Mazur T, Mutic S, Yang D, et al. "A method to reconstruct and apply 3D primary fluence for treatment delivery verification." Journal of Applied Clinical Medical Physics (2017); 18(1),128-138.
  • Fu Y, Liu S, Yang D, et al. "Automatic segmentation of human skeleton from CT data using atlas-based articulated registration." Physics in Medicine and Biology, (2017); 62(7),2812.
  • Liu S, Green O, Yang D, et al. "Methods to model and predict the ViewRay treatment deliveries to aid patient scheduling and treatment planning." Journal of Applied Clinical Medical Physics. (2016); 17(2).
  • Yang D, Wooten HO, Liu S, et al. "A software tool to automatically assure and report daily treatment deliveries by a Cobalt-60 radiation therapy device." Journal of Applied Clinical Medical Physics (2016); 17(3).
  • Liu S, Hennelly BM, Guo C, Sheridan JT. "Robustness of Double Random Phase Encoding spread-space spread-spectrum image watermaking technique." Signal Processing (2015); 109,345-361.
  • Guo C, Liu S, and Sheridan JT. "Iterative phase retrieval algorithms. Part I: optimization." Applied Optics (2015); 54(15), 4698-4708.
  • Guo C, Liu S, and Sheridan JT. "Iterative phase retrieval algorithms. Part II: Attacking optical encryption systems." Applied Optics, (2015); 54(15), 4709-4719.
  • Wu Y, Ryle JP, Liu S, et al. "Experimental evaluation of inline free-space holography systems." Applied Optics (2015); 54, 3991-4000.
  • Guo C, Liu S, and Sheridan JT. "Optical double image encryption: employing a pseudo image technique in the Fourier domain," Optics Communications (2014); 321,61-72.
  • Liu S, Hennelly BM, and Sheridan JT. "Digital image watermarking spread-space spread-spectrum technique based on Double Random Encoding." Optics Communications (2013); 300,162-177.
  • Liu S, Guo C, and Sheridan JT. "A review of optical image encryption techniques." Optics & Laser Technology (2013); 57, 327-342.
  • Liu S, Hennelly BM, and Sheridan JT. "Numerical simulation of Double Random Phase Encoding." Optical Engineering (2012); 51,128201.
  • Liu S and Sheridan JT. "Optical encryption by combining image scrambling techniques in fractional Fourier domains." Optics Communications (2011); 287,7380.