Ehsan Samei, PhD

Professor, Departments of Radiology, Medical Physics, Biomedical Engineering, and Physics, Duke University

Dr. Ehsan Samei, PhD, is a tenured Professor of Radiology, Medical Physics, Biomedical Engineering, Physics, and Electrical and Computer Engineering at Duke University, where he also serves as the director of Carl E. Ravin Advanced Imaging Laboratories and the founding director of the Clinical Imaging Physics Group. His expertise includes x-ray imaging, theoretical imaging models, simulation methods, and experimental techniques in medical image formation, analysis, assessment, display, and perception. His current research includes methods to develop image quality and dose metrics that are clinically relevant and that can be used to design and utilize advanced imaging techniques towards optimum interpretive, quantitative, and molecular performance. The main modalities of interest are CT and Tomosynthesis for breast, lung, and abdominal imaging applications. He has been the recipient of 24 extramural grants, and has over 140 referred papers. He is certified by the American Board of Radiology, is a Fellow of the American Association of Physicists in Medicine (AAPM), and is a Fellow of the International Society of Optical Engineering (SPIE). He was the founding Director of the Graduate Studies of the Duke Medical Physics Graduate Program. He has held leadership positions in the AAPM, the SPIE, and the Society of Directors of Academic Medical Physics Programs (SDAMPP), and was recently appointed to the National Council of Radiation Protection and Measurements (NCRP).

Dr. Samei's Lectures

Image Quality vs. Diagnostic Accuracy

Select Publications

  1. Mahesh A, Samei E, Bisset III GS. Radiation dose in CT. RSNA/AAPM Educational module, RSNA Publications, 2009.
  2. Marin D, Nelson R, Schindera ST, Richard S, Youngblood RS, Yoshizumi TT, Samei E. Low-tube-voltage, high--tube current multi-detector row CT of the abdomen: improved image quality and decreased radiation dose with an adaptive statistical iterative reconstruction algorithm – initial clinical experience. Radiology 254(1): 145-153, 2010.
  3. Marin D, Nelson R, Barnhart H, Schindera ST, Ho LM, Jaffe TA, Yoshizumi TT, Youngblood R, Samei E. Effect of a low tube voltage, high tube current multi-detector row CT technique on the detection of pancreatic tumors, image quality and radiation dose during the pancreatic parenchymal phase. Radiology 256(2): 450-459, 2010.
  4. Peck D, Samei E. How to understand and communicate radiation risk. Image Wisely Alliance, ACR, 2010.
  5. Li X, Samei E, Segars W, Sturgeon G, Colsher J, Toncheva G, Yoshizumi TT, Frush DP. Monte Carlo method for estimating patient-specific radiation dose and cancer risk in CT: development and validation. Medical Physics 38(1): 397-407, 2011.
  6. Li X, Samei E, Segars W, Sturgeon G, Colsher J, Toncheva G, Yoshizumi TT, Frush DP. Monte Carlo method for estimating patient-specific radiation dose and cancer risk in CT: application to patients. Medical Physics 38(1): 408-419, 2011. This article was selected as Editor's Pick as a top article in the journal issue.
  7. Li X, Samei E, Segars W, Sturgeon G, Colsher J, Frush DP. Patient-specific dose and risk estimation in pediatric chest CT. Radiology 259(3): 862-874, 2011.
  8. Husarik DB, Marin D, Richard S, Samei E, Chen B, Jaffe TA, Bashir MR, Nelson RC. Radiation dose reduction in abdominal CT using a model based iterative reconstruction algorithm: How low can we go? Investigative Radiology 47(2): 121-127, 2012.
  9. McCollough CH, Chen GH, Kalender W, Leng S, Pelc N,Samei E, Taguchi K, Wang G, Yu L. Technical steps needed to achieve routine sub-mSv CT scanning: report from the summit on management of radiation dose in CT (invited article). Radiology 264(2): 567-580, 2012.
  10. Zhang Y, Li X, Segars WP, Samei E. Organ dose, effective dose, and risk index in adult CT: comparison of four types of reference phantoms across different protocols. Medical Physics 39(6), 3404-3423, 2012.
  11. Richard S, Yadava G, Murphy S, Samei E. Towards task-based assessment of CT performance: system and object MTF across different reconstruction algorithms. Medical Physics 39(7), 4115-4121, 2012. This article was selected as Editor’s Pick as a top article in the journal issue.
  12. Solomon J, Christianson O, Samei E. Quantitative comparison of noise texture across CT scanners from different manufacturers. Medical Physics 39(10): 6050-6055, 2012.
  13. Li X, Samei E, Williams CH, Segars WP, Tward D, Miller MI, Ratnanather JT. Effects of protocol and obesity on dose conversion factors in adult body CT. Medical Physics 39(11): 6550-6571, 2012.
  14. Christianson O, Li X, Frush DP, Samei E. Automated patient-specific CT dose monitoring system: assessing variability in CT dose. Medical Physics 39(11): 7131-7139. 2012.
  15. Samei E, Li X, Chen B, Reiman R. The effect of dose heterogeneity on risk estimation in x-ray imaging. Radiation Protection Dosimetry, Online publication, Oct 31, 2012.
  16. Wilson JM, Christianson OI, Richard S, Samei E. A methodology for image quality evaluation of advanced CT systems. Medical Physics 40(3): 031908-01-09, 2013.
  17. Solomon JB, Li X, Samei E. Relating noise to image quality indicators in CT examinations with tube current modulation. AJR 200: 592-600, 2013.