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Brant Ulsh, PH.D.

profile image placeholder, grey silhouette of a person Northeast Cancer Centre 
Health Sciences North | Horizon Santé-Nord
41 Ramsey Lake Rd.
Sudbury, P3E 5J1, CANADA
Assistant Professor, Northern Ontario School of Medicine, Medical Sciences Division
Adjunct Faculty Member: Colorado State University, Department of Radiological and Environmental Health Sciences
Principal Health Physicist: M. H. Chew & Associates



Postdoctoral Fellowship; Institute of Applied Radiation Sciences
McMaster University


Ph.D.; Radiological Health Sciences
Department of Radiological and Environmental Health Sciences, Colorado State University (Fort Collins, CO, USA)


M.Sc.; Health Physics
College of Engineering, University of Cincinnati (Cincinnati, OH, USA)


B.Sc.; Nuclear Engineering
College of Engineering, University of Cincinnati

Research Investigations

My current interests include:

  • Biological responses to low dose and/or dose-rate radiation exposures;
  • Radiation protection in the context of medical imaging;
  • Radiation dose reconstruction;
  • Radiation biodosimetry;
  • Radiation ecology.

Selected Publications

Ulsh BA (2015) Are risks from medical imaging still too small to be observed or nonexistent? Dose-Response, 13(1): 1-27. DOI: 10.2203/dose-response.14-030.Ulsh

Ulsh BA (2012) The new radiobiology: returning to our roots. Dose-Response 10, 593-609. DOI: 10.2203/dose-response.12-021.Ulsh

Ulsh BA (2010) Checking the foundation: recent radiobiology and the linear no-threshold theory. Health Physics, 99(6), 747-758. DOI: 10.1097/HP.0b013e3181e32477

Ulsh BA, Rich BL, Chew MH, Morris R, Sharfi M, Rolfes M. (2008) Establishing bounding internal dose estimates for thorium activities at Rocky Flats. Health Physics 95, 81-88.

Ulsh BA, Miller SM, Mallory FF, Mitchel REJ, Morrison DP, and Boreham DR (2004) Cytogenetic dose-response and adaptive response in ungulate species exposed to ionizing radiation. Journal of Environmental Radioactivity. 74, 73-81. DOI: 10.1016/j.jenvrad.2004.01.005

Ulsh BA, Dugan L, Hinton TG, Whicker FW, and Bedford JS (2003) Environmental biodosimetry: a biologically relevant tool for ecological risk assessment and biomonitoring. Journal of Environmental Radioactivity, 66, 121-139. DOI: 10.1016/S0265-931X(02)00119-4

Ulsh BA, Whicker FW, Hinton TG, Congdon JD, and Bedford JS (2001) Chromosome translocations in T. Scripta: the dose-rate effect and in vivo lymphocyte radiation response. Radiation Research, 155, 63-73.

Mühlmann-Díaz MC, Ulsh BA, Whicker FW, Hinton TG, Congdon JD, Robinson JF, and Bedford JS (2001) Conservation of chromosome-1 in turtles over 66 million years. Cytogenetics and Cell Genetics, 92, 139-143.

Ulsh BA, Mühlmann-Díaz MC, Whicker FW, Hinton TG, Congdon JD, and Bedford JS (2000) Chromosome translocations in turtles: a biomarker in a sentinel animal for ecological dosimetry. Radiation Research, 153, 752-759.

Ulsh BA, Rademacher S, and Whicker FW (1999) Variations of 137Cs depositions and soil concentrations between alpine and montane soils in northern Colorado. Journal of Environmental Radioactivity, 47, 57-70.