Ehsan Samei

Samei

Reed and Martha Rice Distinguished Professor of Radiology

Dr. Ehsan Samei, PhD, DABR, FAAPM, FSPIE, FAIMBE, FIOMP, FACR is a Persian-American medical physicist. He is the Reed and Martha Rice Distinguished Professor of Radiology, and Professor of Medical Physics, Biomedical Engineering, Physics, and Electrical and Computer Engineering at Duke University. He serves as the Chief Imaging Physicist for Duke University Health System, the Director of the Carl E Ravin Advanced Imaging Laboratories and the Center for Virtual Imaging Trials (CVIT), and co-PI of one the five Centers of Excellence in Regulatory Science and Innovation (CERSI), Triangle CERSI. He is certified by the American Board of Radiology, recognized as a Distinguished Investigator by the Academy of Radiology Research, and awarded Fellow by five professional organization. He founded/co-founded the Duke Medical Physics Program, the Duke Imaging Physics Residency Program, the Duke Clinical Imaging Physics Group, the Center for Virtual Imaging Trials, and the Society of Directors of Academic Medical Physics Programs (SDAMPP). He has held senior leadership positions in the AAPM, SPIE, SDAMPP, and RSNA, including election to the presidency of the SEAAPM (2010-2011), SDAMPP (2011), and AAPM (2023).

Dr. Samei’s scientific expertise include x-ray imaging, theoretical imaging models, simulation methods, and experimental techniques in medical image formation, quantification, and perception.  His research aims to bridge the gap between scientific scholarship and clinical practice, in the meaningful realization of translational research, and in clinical processes that are informed by scientific evidence. He has advanced image quality and safety metrics and radiometrics that are clinically relevant and that can be used to design, optimize, and monitor interpretive and quantitative performance of imaging techniques. These have been implemented in advanced imaging performance characterization, procedural optimization, and clinical dose and quality analytics. His most recent research interests have been virtual clinical trial across a broad spectrum of oncologic, pulmonary, cardiac, and vascular diseases, and developing methodological advances that provide smart fusions of principle-informed and AI-based, data-informed approaches to scientific inquiry.

Dr. Samei has mentored over 140 trainees (graduate and postgraduate). He has >1400 scientific publications including >360 referred journal articles, ~600 conference presentations, and 4 books. Citations to his work is reflected in an h-index of 74 and a Weighted Relative Citation Ratio of 613. His laboratory of over 20 researchers has been supported continuously over two decades by 44 extramural grants, culminating in a NIH Program Project grant in 2021 to establish the national Center for Virtual Imaging Trials (CVIT), joining a small number of prominent Biomedical Technology Research Centers across the nation. In 2023, he, along with 3 other PIs, was awarded to lead one of five national Centers of Excellence in Regulatory Science and Innovation (Triangle CERSI) by the FDA.

Appointments and Affiliations

  • Reed and Martha Rice Distinguished Professor of Radiology
  • Professor in Radiology
  • Member of the Duke Cancer Institute
  • Professor of Physics
  • Professor in the Department of Electrical and Computer Engineering
  • Professor of Biomedical Engineering

Contact Information

Education

  • Ph.D. University of Michigan, Ann Arbor, 1997
  • M.E. University of Michigan, Ann Arbor, 1995

Research Interests

Dr. Samei’s scientific expertise include x-ray imaging, theoretical imaging models, simulation methods, and experimental techniques in medical image formation, quantification, and perception.  His research aims to bridge the gap between scientific scholarship and clinical practice, in the meaningful realization of translational research, and in clinical processes that are informed by scientific evidence. He has advanced image quality and safety metrics and radiometrics that are clinically relevant and that can be used to design, optimize, and monitor interpretive and quantitative performance of imaging techniques. These have been implemented in advanced imaging performance characterization, procedural optimization, and clinical dose and quality analytics. His most recent research interests have been virtual clinical trial across a broad spectrum of oncologic, pulmonary, cardiac, and vascular diseases, and developing methodological advances that provide smart fusions of principle-informed and AI-based, data-informed approaches to scientific inquiry.

Awards, Honors, and Distinctions

  • Marie Sklodowska-Curie Award. International Organization of Medical Physics (IOMP). 2022
  • Fellow. American College of Radiology. 2021
  • Jimmy O. Finn Lifetime Achievement Award. The Southeast Chapter of the American Association of Physicists in Medicine. 2020
  • Award for Outstanding Directorship of Medical Physics Program. Graduate School, Department of Radiology, and Department of Radiation Oncology, Duke University. 2019
  • Fellow. American Institute for Medical and Biological Engineering (AIMBE). 2017
  • Director’s Award for Dedication and Service. Duke Kunshan University. 2016
  • Farrington Daniels Award. American Association of Physicists in Medicine. 2013
  • Fellow. International Society for Optics and Photonics. 2010
  • Fellows. American Association of Physicists in Medicine. 2009

Courses Taught

  • MEDPHY 732: Advanced Topics of Ionizing-based Imaging Modalities
  • BME 792: Continuation of Graduate Independent Study

In the News

Representative Publications

  • Samei, E; Murphy, S; Christianson, O, DQE of wireless digital detectors: comparative performance with differing filtration schemes., Med Phys, vol 40 no. 8 (2013) [10.1118/1.4813298] [abs].
  • Samei, E; Li, X; Chen, B; Reiman, R, The effect of dose heterogeneity on radiation risk in medical imaging., Radiat Prot Dosimetry, vol 155 no. 1 (2013), pp. 42-58 [10.1093/rpd/ncs275] [abs].
  • Chen, B; Marin, D; Richard, S; Husarik, D; Nelson, R; Samei, E, Precision of iodine quantification in hepatic CT: effects of iterative reconstruction with various imaging parameters., AJR Am J Roentgenol, vol 200 no. 5 (2013), pp. W475-W482 [10.2214/AJR.12.9658] [abs].
  • Segars, WP; Bond, J; Frush, J; Hon, S; Eckersley, C; Williams, CH; Feng, J; Tward, DJ; Ratnanather, JT; Miller, MI; Frush, D; Samei, E, Population of anatomically variable 4D XCAT adult phantoms for imaging research and optimization., Med Phys, vol 40 no. 4 (2013) [10.1118/1.4794178] [abs].
  • Solomon, JB; Li, X; Samei, E, Relating noise to image quality indicators in CT examinations with tube current modulation., AJR Am J Roentgenol, vol 200 no. 3 (2013), pp. 592-600 [10.2214/AJR.12.8580] [abs].
  • Wilson, JM; Christianson, OI; Richard, S; Samei, E, A methodology for image quality evaluation of advanced CT systems., Med Phys, vol 40 no. 3 (2013) [10.1118/1.4791645] [abs].
  • Copple, C; Robertson, ID; Thrall, DE; Samei, E, Evaluation of two objective methods to optimize kVp and personnel exposure using a digital indirect flat panel detector and simulated veterinary patients., Vet Radiol Ultrasound, vol 54 no. 1 (2013), pp. 9-16 [10.1111/j.1740-8261.2012.01989.x] [abs].
  • Li, X; Samei, E; Williams, CH; Segars, WP; Tward, DJ; Miller, MI; Ratnanather, JT; Paulson, EK; Frush, DP, Effects of protocol and obesity on dose conversion factors in adult body CT., Med Phys, vol 39 no. 11 (2012), pp. 6550-6571 [10.1118/1.4754584] [abs].
  • Christianson, O; Li, X; Frush, D; Samei, E, Automated size-specific CT dose monitoring program: assessing variability in CT dose., Med Phys, vol 39 no. 11 (2012), pp. 7131-7139 [10.1118/1.4761871] [abs].
  • Solomon, JB; Christianson, O; Samei, E, Quantitative comparison of noise texture across CT scanners from different manufacturers., Med Phys, vol 39 no. 10 (2012), pp. 6048-6055 [10.1118/1.4752209] [abs].
  • Pollard, BJ; Samei, E; Chawla, AS; Beam, C; Heyneman, LE; Koweek, LMH; Martinez-Jimenez, S; Washington, L; Hashimoto, N; McAdams, HP, The effects of ambient lighting in chest radiology reading rooms., J Digit Imaging, vol 25 no. 4 (2012), pp. 520-526 [10.1007/s10278-012-9459-5] [abs].
  • McCollough, CH; Chen, GH; Kalender, W; Leng, S; Samei, E; Taguchi, K; Wang, G; Yu, L; Pettigrew, RI, Achieving routine submillisievert CT scanning: report from the summit on management of radiation dose in CT., Radiology, vol 264 no. 2 (2012), pp. 567-580 [10.1148/radiol.12112265] [abs].
  • Richard, S; Husarik, DB; Yadava, G; Murphy, SN; Samei, E, Towards task-based assessment of CT performance: System and object MTF across different reconstruction algorithms., Med Phys, vol 39 no. 7Part1 (2012), pp. 4115-4122 [10.1118/1.4725171] [abs].
  • Chen, B; Barnhart, H; Richard, S; Colsher, J; Amurao, M; Samei, E, Quantitative CT: technique dependence of volume estimation on pulmonary nodules., Phys Med Biol, vol 57 no. 5 (2012), pp. 1335-1348 [10.1088/0031-9155/57/5/1335] [abs].
  • Samei, E; Button, TM; Orton, CG, Point/Counterpoint: The 2014 initiative can have potentially unintended negative consequences for medical physics in diagnostic imaging and nuclear medicine., Med Phys, vol 39 no. 3 (2012), pp. 1167-1168 [10.1118/1.3658741] [abs].
  • Samei, E; Majdi-Nasab, N; Dobbins, JT; McAdams, HP, Biplane correlation imaging: a feasibility study based on phantom and human data., J Digit Imaging, vol 25 no. 1 (2012), pp. 137-147 [10.1007/s10278-011-9392-z] [abs].
  • Samei, E; Anthony Seibert, J, The tenuous state of clinical medical physics in diagnostic imaging., Med Phys, vol 38 no. 12 (2011), pp. iii-iv [10.1118/1.3664002] [abs].
  • Wang, CL; Chea, YW; Boll, DT; Samei, E; Neville, AM; Dale, BM; Merkle, EM, Effect of gadolinium chelate contrast agents on diffusion weighted MR imaging of the liver, spleen, pancreas and kidney at 3 T., Eur J Radiol, vol 80 no. 2 (2011), pp. e1-e7 [10.1016/j.ejrad.2010.05.019] [abs].
  • D'Alessandro, B; Madsen, M; Samei, E; Li, X; Wooi-Tan, J; Berbaum, KS; Schartz, K; Caldwell, R; Zuckier, LS, Synthetic positron emission tomography-computed tomography images for use in perceptual studies., Semin Nucl Med, vol 41 no. 6 (2011), pp. 437-448 [10.1053/j.semnuclmed.2011.06.007] [abs].
  • Samei, E; Saunders, RS, Dual-energy contrast-enhanced breast tomosynthesis: optimization of beam quality for dose and image quality., Phys Med Biol, vol 56 no. 19 (2011), pp. 6359-6378 [10.1088/0031-9155/56/19/013] [abs].
  • Samei, E; Ranger, NT; Dobbins, JT; Ravin, CE, Effective dose efficiency: an application-specific metric of quality and dose for digital radiography., Phys Med Biol, vol 56 no. 16 (2011), pp. 5099-5118 [10.1088/0031-9155/56/16/002] [abs].
  • Li, X; Samei, E; Segars, WP; Sturgeon, GM; Colsher, JG; Frush, DP, Patient-specific radiation dose and cancer risk for pediatric chest CT., Radiology, vol 259 no. 3 (2011), pp. 862-874 [10.1148/radiol.11101900] [abs].
  • Chen, B; Shorey, J; Saunders, RS; Richard, S; Thompson, J; Nolte, LW; Samei, E, An anthropomorphic breast model for breast imaging simulation and optimization., Acad Radiol, vol 18 no. 5 (2011), pp. 536-546 [10.1016/j.acra.2010.11.009] [abs].
  • Li, X; Samei, E; Barnhart, HX; Gaca, AM; Hollingsworth, CL; Maxfield, CM; Carrico, CWT; Colsher, JG; Frush, DP, Lung nodule detection in pediatric chest CT: quantitative relationship between image quality and radiologist performance., Med Phys, vol 38 no. 5 (2011), pp. 2609-2618 [10.1118/1.3582975] [abs].
  • Webb, LJ; Samei, E; Lo, JY; Baker, JA; Ghate, SV; Kim, C; Soo, MS; Walsh, R, Comparative performance of multiview stereoscopic and mammographic display modalities for breast lesion detection., Med Phys, vol 38 no. 4 (2011), pp. 1972-1980 [10.1118/1.3562901] [abs].
  • Li, X; Samei, E; Segars, WP; Sturgeon, GM; Colsher, JG; Toncheva, G; Yoshizumi, TT; Frush, DP, Patient-specific radiation dose and cancer risk estimation in CT: part II. Application to patients., Med Phys, vol 38 no. 1 (2011), pp. 408-419 [10.1118/1.3515864] [abs].
  • Li, X; Samei, E; Segars, WP; Sturgeon, GM; Colsher, JG; Toncheva, G; Yoshizumi, TT; Frush, DP, Patient-specific radiation dose and cancer risk estimation in CT: part I. development and validation of a Monte Carlo program., Med Phys, vol 38 no. 1 (2011), pp. 397-407 [10.1118/1.3515839] [abs].
  • Richard, S; Samei, E, Quantitative breast tomosynthesis: from detectability to estimability., Med Phys, vol 37 no. 12 (2010), pp. 6157-6165 [10.1118/1.3501883] [abs].
  • Marin, D; Nelson, RC; Barnhart, H; Schindera, ST; Ho, LM; Jaffe, TA; Yoshizumi, TT; Youngblood, R; Samei, E, Detection of pancreatic tumors, image quality, and radiation dose during the pancreatic parenchymal phase: effect of a low-tube-voltage, high-tube-current CT technique--preliminary results., Radiology, vol 256 no. 2 (2010), pp. 450-459 [10.1148/radiol.10091819] [abs].
  • Richard, S; Samei, E, Quantitative imaging in breast tomosynthesis and CT: Comparison of detection and estimation task performance., Med Phys, vol 37 no. 6Part1 (2010), pp. 2627-2637 [10.1118/1.3429025] [abs].
  • Fleck, MS; Samei, E; Mitroff, SR, Generalized "satisfaction of search": adverse influences on dual-target search accuracy., J Exp Psychol Appl, vol 16 no. 1 (2010), pp. 60-71 [10.1037/a0018629] [abs].
  • Shafer, CM; Samei, E; Lo, JY, The quantitative potential for breast tomosynthesis imaging., Med Phys, vol 37 no. 3 (2010), pp. 1004-1016 [10.1118/1.3285038] [abs].
  • Ranger, NT; Lo, JY; Samei, E, A technique optimization protocol and the potential for dose reduction in digital mammography., Med Phys, vol 37 no. 3 (2010), pp. 962-969 [10.1118/1.3276732] [abs].
  • Marin, D; Nelson, RC; Schindera, ST; Richard, S; Youngblood, RS; Yoshizumi, TT; Samei, E, Low-tube-voltage, high-tube-current multidetector abdominal CT: improved image quality and decreased radiation dose with adaptive statistical iterative reconstruction algorithm--initial clinical experience., Radiology, vol 254 no. 1 (2010), pp. 145-153 [10.1148/radiol.09090094] [abs].
  • Chawla, AS; Lo, JY; Baker, JA; Samei, E, Optimized image acquisition for breast tomosynthesis in projection and reconstruction space., Med Phys, vol 36 no. 11 (2009), pp. 4859-4869 [10.1118/1.3231814] [abs].
  • Samei, E; Ranger, NT; MacKenzie, A; Honey, ID; Dobbins, JT; Ravin, CE, Effective DQE (eDQE) and speed of digital radiographic systems: an experimental methodology., Med Phys, vol 36 no. 8 (2009), pp. 3806-3817 [10.1118/1.3171690] [abs].
  • Li, X; Samei, E; DeLong, DM; Jones, RP; Gaca, AM; Hollingsworth, CL; Maxfield, CM; Colsher, JG; Frush, DP, Pediatric MDCT: towards assessing the diagnostic influence of dose reduction on the detection of small lung nodules., Acad Radiol, vol 16 no. 7 (2009), pp. 872-880 [10.1016/j.acra.2009.01.028] [abs].
  • Shepard, SJ; Wang, J; Flynn, M; Gingold, E; Goldman, L; Krugh, K; Leong, DL; Mah, E; Ogden, K; Peck, D; Samei, E; Willis, CE, An exposure indicator for digital radiography: AAPM Task Group 116 (executive summary)., Med Phys, vol 36 no. 7 (2009), pp. 2898-2914 [10.1118/1.3121505] [abs].
  • Marin, D; Nelson, RC; Samei, E; Paulson, EK; Ho, LM; Boll, DT; DeLong, DM; Yoshizumi, TT; Schindera, ST, Hypervascular liver tumors: low tube voltage, high tube current multidetector CT during late hepatic arterial phase for detection--initial clinical experience., Radiology, vol 251 no. 3 (2009), pp. 771-779 [10.1148/radiol.2513081330] [abs].
  • Saunders, RS; Samei, E; Lo, JY; Baker, JA, Can compression be reduced for breast tomosynthesis? Monte carlo study on mass and microcalcification conspicuity in tomosynthesis., Radiology, vol 251 no. 3 (2009), pp. 673-682 [10.1148/radiol.2521081278] [abs].
  • Li, X; Samei, E; Delong, DM; Jones, RP; Gaca, AM; Hollingsworth, CL; Maxfield, CM; Carrico, CWT; Frush, DP, Three-dimensional simulation of lung nodules for paediatric multidetector array CT., Br J Radiol, vol 82 no. 977 (2009), pp. 401-411 [10.1259/bjr/51749983] [abs].
  • Chawla, AS; Saunders, RS; Singh, S; Lo, JY; Samei, E, Towards optimized acquisition scheme for multiprojection correlation imaging of breast cancer., Acad Radiol, vol 16 no. 4 (2009), pp. 456-463 [10.1016/j.acra.2008.09.013] [abs].
  • Pollard, BJ; Samei, E; Chawla, AS; Baker, J; Ghate, S; Kim, C; Soo, MS; Hashimoto, N, The influence of increased ambient lighting on mass detection in mammograms., Acad Radiol, vol 16 no. 3 (2009), pp. 299-304 [10.1016/j.acra.2008.08.017] [abs].
  • Castella, C; Eckstein, MP; Abbey, CK; Kinkel, K; Verdun, FR; Saunders, RS; Samei, E; Bochud, FO, Mass detection on mammograms: influence of signal shape uncertainty on human and model observers., J Opt Soc Am A Opt Image Sci Vis, vol 26 no. 2 (2009), pp. 425-436 [10.1364/josaa.26.000425] [abs].
  • Li, X; Samei, E, Comparison of patient size-based methods for estimating quantum noise in CT images of the lung., Med Phys, vol 36 no. 2 (2009), pp. 541-546 [10.1118/1.3058482] [abs].
  • Samei, E; Saunders, RS; Badea, CT; Ghaghada, KB; Hedlund, LW; Qi, Y; Yuan, H; Bentley, RC; Mukundan, S, Micro-CT imaging of breast tumors in rodents using a liposomal, nanoparticle contrast agent., Int J Nanomedicine, vol 4 (2009), pp. 277-282 [abs].
  • Li, X; Samei, E; Segars, WP; Sturgeon, GM; Colsher, JG; Frush, DP, Patient-specific dose estimation for pediatric chest CT., Med Phys, vol 35 no. 12 (2008), pp. 5821-5828 [10.1118/1.3026593] [abs].
  • Samei, E; Ranger, NT; MacKenzie, A; Honey, ID; Dobbins, JT; Ravin, CE, Detector or system? Extending the concept of detective quantum efficiency to characterize the performance of digital radiographic imaging systems., Radiology, vol 249 no. 3 (2008), pp. 926-937 [10.1148/radiol.2492071734] [abs].
  • Saunders, RS; Samei, E, The effect of breast compression on mass conspicuity in digital mammography., Med Phys, vol 35 no. 10 (2008), pp. 4464-4473 [10.1118/1.2977600] [abs].
  • Singh, S; Tourassi, GD; Baker, JA; Samei, E; Lo, JY, Automated breast mass detection in 3D reconstructed tomosynthesis volumes: a featureless approach., Med Phys, vol 35 no. 8 (2008), pp. 3626-3636 [10.1118/1.2953562] [abs].
  • Pollard, BJ; Chawla, AS; Delong, DM; Hashimoto, N; Samei, E, Object detectability at increased ambient lighting conditions., Med Phys, vol 35 no. 6 (2008), pp. 2204-2213 [10.1118/1.2907566] [abs].
  • Fetterly, KA; Blume, HR; Flynn, MJ; Samei, E, Introduction to grayscale calibration and related aspects of medical imaging grade liquid crystal displays., J Digit Imaging, vol 21 no. 2 (2008), pp. 193-207 [10.1007/s10278-007-9022-y] [abs].
  • Williams, MB; Raghunathan, P; More, MJ; Seibert, JA; Kwan, A; Lo, JY; Samei, E; Ranger, NT; Fajardo, LL; McGruder, A; McGruder, SM; Maidment, ADA; Yaffe, MJ; Bloomquist, A; Mawdsley, GE, Optimization of exposure parameters in full field digital mammography., Med Phys, vol 35 no. 6 (2008), pp. 2414-2423 [10.1118/1.2912177] [abs].
  • Chawla, AS; Samei, E; Saunders, RS; Lo, JY; Baker, JA, A mathematical model platform for optimizing a multiprojection breast imaging system., Med Phys, vol 35 no. 4 (2008), pp. 1337-1345 [10.1118/1.2885367] [abs].
  • Samei, E; Ranger, NT; Delong, DM, A comparative contrast-detail study of five medical displays., Med Phys, vol 35 no. 4 (2008), pp. 1358-1364 [10.1118/1.2868780] [abs].
  • Schindera, ST; Nelson, RC; Mukundan, S; Paulson, EK; Jaffe, TA; Miller, CM; DeLong, DM; Kawaji, K; Yoshizumi, TT; Samei, E, Hypervascular liver tumors: low tube voltage, high tube current multi-detector row CT for enhanced detection--phantom study., Radiology, vol 246 no. 1 (2008), pp. 125-132 [10.1148/radiol.2461070307] [abs].
  • Saunders, RS; Baker, JA; Delong, DM; Johnson, JP; Samei, E, Does image quality matter? Impact of resolution and noise on mammographic task performance., Med Phys, vol 34 no. 10 (2007), pp. 3971-3981 [10.1118/1.2776253] [abs].
  • Chawla, AS; Samei, E; Saunders, R; Abbey, C; Delong, D, Effect of dose reduction on the detection of mammographic lesions: a mathematical observer model analysis., Med Phys, vol 34 no. 8 (2007), pp. 3385-3398 [10.1118/1.2756607] [abs].
  • Ranger, NT; Samei, E; Dobbins, JT; Ravin, CE, Assessment of detective quantum efficiency: intercomparison of a recently introduced international standard with prior methods., Radiology, vol 243 no. 3 (2007), pp. 785-795 [10.1148/radiol.2433060485] [abs].
  • Samei, E; Stebbins, SA; Dobbins, JT; McAdams, HP; Lo, JY, Multiprojection correlation imaging for improved detection of pulmonary nodules., AJR Am J Roentgenol, vol 188 no. 5 (2007), pp. 1239-1245 [10.2214/AJR.06.0843] [abs].
  • Badea, CT; Hedlund, LW; De Lin, M; Mackel, JSB; Samei, E; Johnson, GA, Tomographic digital subtraction angiography for lung perfusion estimation in rodents., Med Phys, vol 34 no. 5 (2007), pp. 1546-1555 [10.1118/1.2717384] [abs].
  • Samei, E; Poolla, A; Ulissey, MJ; Lewin, JM, Digital mammography: comparative performance of color LCD and monochrome CRT displays., Acad Radiol, vol 14 no. 5 (2007), pp. 539-546 [10.1016/j.acra.2007.01.022] [abs].
  • Samei, E; Saunders, RS; Baker, JA; Delong, DM, Digital mammography: effects of reduced radiation dose on diagnostic performance., Radiology, vol 243 no. 2 (2007), pp. 396-404 [10.1148/radiol.2432061065] [abs].
  • Ruschin, M; Timberg, P; Båth, M; Hemdal, B; Svahn, T; Saunders, RS; Samei, E; Andersson, I; Mattsson, S; Chakrabort, DP; Tingber, A, Dose dependence of mass and microcalcification detection in digital mammography: free response human observer studies., Med Phys, vol 34 no. 2 (2007), pp. 400-407 [10.1118/1.2405324] [abs].
  • Chawla, AS; Samei, E, Ambient illumination revisited: a new adaptation-based approach for optimizing medical imaging reading environments., Med Phys, vol 34 no. 1 (2007), pp. 81-90 [10.1118/1.2402583] [abs].
  • McAdams, HP; Samei, E; Dobbins, J; Tourassi, GD; Ravin, CE, Recent advances in chest radiography., Radiology, vol 241 no. 3 (2006), pp. 663-683 [10.1148/radiol.2413051535] [abs].
  • Saunders, RS; Samei, E, Improving mammographic decision accuracy by incorporating observer ratings with interpretation time., Br J Radiol, vol 79 Spec No 2 (2006), pp. S117-S122 [10.1259/bjr/96931332] [abs].
  • Saunders, RS; Samei, E; Baker, J; Delong, D; Soo, MS; Walsh, R; Pisano, E; Kuzmiak, CM; Pavic, D, Comparison of LCD and CRT displays based on efficacy for digital mammography., Acad Radiol, vol 13 no. 11 (2006), pp. 1317-1326 [10.1016/j.acra.2006.07.017] [abs].
  • De Lin, M; Samei, E; Badea, CT; Yoshizumi, TT; Allan Johnson, G, Optimized radiographic spectra for small animal digital subtraction angiography., Med Phys, vol 33 no. 11 (2006), pp. 4249-4257 [10.1118/1.2356646] [abs].
  • Badano, A; Schneider, S; Samei, E, Visual assessment of angular response in medical liquid crystal displays., J Digit Imaging, vol 19 no. 3 (2006), pp. 240-248 [10.1007/s10278-006-0633-5] [abs].
  • Siegel, E; Krupinski, E; Samei, E; Flynn, M; Andriole, K; Erickson, B; Thomas, J; Badano, A; Seibert, JA; Pisano, ED, Digital mammography image quality: image display., J Am Coll Radiol, vol 3 no. 8 (2006), pp. 615-627 [10.1016/j.jacr.2006.03.007] [abs].
  • Saunders, R; Samei, E; Baker, J; Delong, D, Simulation of mammographic lesions., Acad Radiol, vol 13 no. 7 (2006), pp. 860-870 [10.1016/j.acra.2006.03.015] [abs].
  • Borasi, G; Samei, E; Bertolini, M; Nitrosi, A; Tassoni, D, Contrast-detail analysis of three flat panel detectors for digital radiography., Med Phys, vol 33 no. 6 (2006), pp. 1707-1719 [10.1118/1.2191014] [abs].
  • Samei, E; Ranger, NT; Dobbins, JT; Chen, Y, Intercomparison of methods for image quality characterization. I. Modulation transfer function., Med Phys, vol 33 no. 5 (2006), pp. 1454-1465 [10.1118/1.2188816] [abs].
  • Dobbins, JT; Samei, E; Ranger, NT; Chen, Y, Intercomparison of methods for image quality characterization. II. Noise power spectrum., Med Phys, vol 33 no. 5 (2006), pp. 1466-1475 [10.1118/1.2188819] [abs].
  • Boyce, SJ; Samei, E, Imaging properties of digital magnification radiography., Med Phys, vol 33 no. 4 (2006), pp. 984-996 [10.1118/1.2174133] [abs].
  • Samei, E; Wright, SL, Viewing angle performance of medical liquid crystal displays., Med Phys, vol 33 no. 3 (2006), pp. 645-654 [10.1118/1.2168430] [abs].
  • Hoe, CL; Samei, E; Frush, DP; Delong, DM, Simulation of liver lesions for pediatric CT., Radiology, vol 238 no. 2 (2006), pp. 699-705 [10.1148/radiol.2381050477] [abs].
  • Saunders, RS; Samei, E, Resolution and noise measurements of five CRT and LCD medical displays., Med Phys, vol 33 no. 2 (2006), pp. 308-319 [10.1118/1.2150777] [abs].
  • McKinley, RL; Tornai, MP; Brzymialkiewicz, C; Madhav, P; Samei, E; Bowsher, JE, Analysis of a novel offset cone-beam computed mammotomography system geometry for accomodating various breast sizes., Phys Med, vol 21 Suppl 1 (2006), pp. 48-55 [10.1016/S1120-1797(06)80024-4] [abs].
  • Samei, E; Buhr, E; Granfors, P; Vandenbroucke, D; Wang, X, Comparison of edge analysis techniques for the determination of the MTF of digital radiographic systems., Phys Med Biol, vol 50 no. 15 (2005), pp. 3613-3625 [10.1088/0031-9155/50/15/009] [abs].
  • Ranger, NT; Samei, E; Dobbins, JT; Ravin, CE, Measurement of the detective quantum efficiency in digital detectors consistent with the IEC 62220-1 standard: Practical considerations regarding the choice of filter material., Med Phys, vol 32 no. 7Part1 (2005), pp. 2305-2311 [10.1118/1.1929187] [abs].
  • Samei, E; Lo, JY; Yoshizumi, TT; Jesneck, JL; Dobbins, JT; Floyd, CE; McAdams, HP; Ravin, CE, Comparative scatter and dose performance of slot-scan and full-field digital chest radiography systems., Radiology, vol 235 no. 3 (2005), pp. 940-949 [10.1148/radiol.2353040516] [abs].
  • Samei, E; Badano, A; Chakraborty, D; Compton, K; Cornelius, C; Corrigan, K; Flynn, MJ; Hemminger, B; Hangiandreou, N; Johnson, J; Moxley-Stevens, DM; Pavlicek, W; Roehrig, H; Rutz, L; Shepard, J; Uzenoff, RA; Wang, J; Willis, CE; AAPM TG18, , Assessment of display performance for medical imaging systems: executive summary of AAPM TG18 report., Med Phys, vol 32 no. 4 (2005), pp. 1205-1225 [10.1118/1.1861159] [abs].
  • Saunders, RS; Samei, E; Jesneck, JL; Lo, JY, Physical characterization of a prototype selenium-based full field digital mammography detector., Med Phys, vol 32 no. 2 (2005), pp. 588-599 [10.1118/1.1855033] [abs].
  • Samei, E, AAPM/RSNA physics tutorial for residents: technological and psychophysical considerations for digital mammographic displays., Radiographics, vol 25 no. 2 (2005), pp. 491-501 [10.1148/rg.252045185] [abs].
  • Samei, E; Dobbins, JT; Lo, JY; Tornai, MP, A framework for optimising the radiographic technique in digital X-ray imaging., Radiat Prot Dosimetry, vol 114 no. 1-3 (2005), pp. 220-229 [10.1093/rpd/nch562] [abs].
  • Samei, E; Rowberg, A; Avraham, E; Cornelius, C, Toward clinically relevant standardization of image quality., J Digit Imaging, vol 17 no. 4 (2004), pp. 271-278 [10.1007/s10278-004-1031-5] [abs].
  • Samei, E; Wright, SL, Luminance and contrast performance of liquid crystal displays for mammographic applications., Technol Cancer Res Treat, vol 3 no. 5 (2004), pp. 429-436 [10.1177/153303460400300503] [abs].
  • Samei, E; Saunders, RS; Lo, JY; Dobbins, JT; Jesneck, JL; Floyd, CE; Ravin, CE, Fundamental imaging characteristics of a slot-scan digital chest radiographic system., Med Phys, vol 31 no. 9 (2004), pp. 2687-2698 [10.1118/1.1783531] [abs].
  • Neitzel, U; Günther-Kohfahl, S; Borasi, G; Samei, E, Determination of the detective quantum efficiency of a digital x-ray detector: comparison of three evaluations using a common image data set., Med Phys, vol 31 no. 8 (2004), pp. 2205-2211 [10.1118/1.1766421] [abs].
  • Jung, H; Kim, H-J; Kang, W-S; Yoo, SK; Fujioka, K; Hasegawa, M; Samei, E, Assessment of flat panel LCD primary class display performance based on AAPM TG 18 acceptance protocol., Med Phys, vol 31 no. 7 (2004), pp. 2155-2164 [10.1118/1.1764946] [abs].
  • Saunders, RS; Samei, E; Hoeschen, C, Impact of resolution and noise characteristics of digital radiographic detectors on the detectability of lung nodules., Med Phys, vol 31 no. 6 (2004), pp. 1603-1613 [10.1118/1.1753112] [abs].
  • McKinley, RL; Tornai, MP; Samei, E; Bradshaw, ML, Simulation study of a quasi-monochromatic beam for x-ray computed mammotomography., Med Phys, vol 31 no. 4 (2004), pp. 800-813 [10.1118/1.1668371] [abs].
  • Samei, E; Seibert, JA; Andriole, K; Badano, A; Crawford, J; Reiner, B; Flynn, MJ; Chang, P, AAPM/RSNA tutorial on equipment selection: PACS equipment overview: general guidelines for purchasing and acceptance testing of PACS equipment., Radiographics, vol 24 no. 1 (2004), pp. 313-334 [10.1148/rg.241035137] [abs].
  • Saunders, RS; Samei, E, A method for modifying the image quality parameters of digital radiographic images., Med Phys, vol 30 no. 11 (2003), pp. 3006-3017 [10.1118/1.1621870] [abs].
  • Turner, SR; Samei, E; Hertzberg, BS; DeLong, DM; Vargas-Voracek, R; Singer, A; Maynor, CH; Kliewer, MA, Sonography of fetal choroid plexus cysts: detection depends on cyst size and gestational age., J Ultrasound Med, vol 22 no. 11 (2003), pp. 1219-1227 [10.7863/jum.2003.22.11.1219] [abs].
  • Samei, E; Flynn, MJ; Peterson, E; Eyler, WR, Subtle lung nodules: influence of local anatomic variations on detection., Radiology, vol 228 no. 1 (2003), pp. 76-84 [10.1148/radiol.2273020509] [abs].
  • Samei, E, Image quality in two phosphor-based flat panel digital radiographic detectors., Med Phys, vol 30 no. 7 (2003), pp. 1747-1757 [10.1118/1.1578772] [abs].
  • Samei, E; Flynn, MJ, An experimental comparison of detector performance for direct and indirect digital radiography systems., Med Phys, vol 30 no. 4 (2003), pp. 608-622 [10.1118/1.1561285] [abs].
  • Samei, E; Hill, JG; Frey, GD; Southgate, WM; Mah, E; Delong, D, Evaluation of a flat panel digital radiographic system for low-dose portable imaging of neonates., Med Phys, vol 30 no. 4 (2003), pp. 601-607 [10.1118/1.1556611] [abs].
  • Dobbins, JT; Samei, E; Chotas, HG; Warp, RJ; Baydush, AH; Floyd, CE; Ravin, CE, Chest radiography: optimization of X-ray spectrum for cesium iodide-amorphous silicon flat-panel detector., Radiology, vol 226 no. 1 (2003), pp. 221-230 [10.1148/radiol.2261012023] [abs].
  • Samei, E; Flynn, MJ, An experimental comparison of detector performance for computed radiography systems., Med Phys, vol 29 no. 4 (2002), pp. 447-459 [10.1118/1.1449873] [abs].
  • Samei, E; Seibert, JA; Willis, CE; Flynn, MJ; Mah, E; Junck, KL, Performance evaluation of computed radiography systems., Med Phys, vol 28 no. 3 (2001), pp. 361-371 [10.1118/1.1350586] [abs].
  • Mah, E; Samei, E; Peck, DJ, Evaluation of a quality control phantom for digital chest radiography., J Appl Clin Med Phys, vol 2 no. 2 (2001), pp. 90-101 [10.1120/jacmp.v2i2.2621] [abs].
  • Ryan, MT; Spicer, KM; Frei-Lahr, D; Samei, E; Frey, GD; Hargrove, H; Bloodworth, G, Health physics consequences of out-patient treatment of non-Hodgkin's lymphoma with 131I-radiolabeled anti-B1 antibody., Health Phys, vol 79 no. 5 Suppl (2000), pp. S52-S55 [10.1097/00004032-200011001-00004] [abs].
  • Kearfott, KJ; Han, S; Wagner, EC; Samei, E; Wang, CK, Numerical simulation of a TLD pulsed laser-heating scheme for determination of shallow dose and deep dose in low-LET radiation fields., Appl Radiat Isot, vol 52 no. 6 (2000), pp. 1419-1429 [10.1016/s0969-8043(99)00251-1] [abs].
  • Samei, E; Flynn, MJ; Eyler, WR, Detection of subtle lung nodules: relative influence of quantum and anatomic noise on chest radiographs., Radiology, vol 213 no. 3 (1999), pp. 727-734 [10.1148/radiology.213.3.r99dc19727] [abs].
  • Flynn, MJ; Samei, E, Experimental comparison of noise and resolution for 2k and 4k storage phosphor radiography systems., Med Phys, vol 26 no. 8 (1999), pp. 1612-1623 [10.1118/1.598656] [abs].
  • Beute, GH; Flynn, MJ; Eyler, WR; Samei, E; Spizarny, DL; Zylak, CJ, Chest radiographic image quality: comparison of asymmetric screen-film, digital storage phosphor, and digital selenium drum systems--preliminary study., Radiographics, vol 18 no. 3 (1998), pp. 745-754 [10.1148/radiographics.18.3.9599395] [abs].
  • Samei, E; Flynn, MJ; Reimann, DA, A method for measuring the presampled MTF of digital radiographic systems using an edge test device., Med Phys, vol 25 no. 1 (1998), pp. 102-113 [10.1118/1.598165] [abs].
  • Samei, E; Flynn, MJ; Eyler, WR, Simulation of subtle lung nodules in projection chest radiography., Radiology, vol 202 no. 1 (1997), pp. 117-124 [10.1148/radiology.202.1.8988200] [abs].
  • Samei, E; Kearfott, KJ, A limited bibliography of the Federal Government-funded human radiation experiments., Health Phys, vol 69 no. 6 (1995), pp. 885-891 [10.1097/00004032-199512000-00001] [abs].
  • Kearfott, KJ; Han, S; McMahan, KL; Samei, E, Sensitivity of a mixed field dosimetry algorithm to uncertainties in thermoluminescent element readings., Health Phys, vol 68 no. 3 (1995), pp. 340-349 [10.1097/00004032-199503000-00006] [abs].