Radiology Personnel

Brent Stewart, Ph.D.

Emeritus Professor
Diagnostic Physics


Brent is a Seattle native.

Research Interests

Brent has had several grants on informatics in the past as director of informatics and is currently working on grant from GE on DoseWatch the topic of which is accurate classification of CT dose information utilized for alarm threshold selection. Brent also is interested in radiation dose and image quality and has several publications in CT and radiography.


  • Biomedical Physics, PhD, 1988
    • University of California at Los Angeles, Los Angeles, CA
  • Physics, BS, 1980
    • University of Washington, Seattle, WA

Recent Publications

See all publications on Scopus

Monitoring and Follow-Up of High Radiation Dose Cases in Interventional Radiology
Perry B., Ingraham C., Stewart B., Valji K., Kanal K.
Academic Radiology. 2018 Jan

Impact of Incremental Increase in CT Image Noise on Detection of Low-contrast Hypodense Liver Lesions
Kanal K., Chung J., Wang J., Bhargava P., Gunn M., Shuman W., Stewart B.
Academic Radiology. 2014 Jan:1233-1239

Estimated skin dose look-up tables and their effect on dose awareness in the fluoroscopy-guided imaging suite
Dickinson R., Zamora D., Kanal K., Stewart B.
American Journal of Roentgenology. 2014 Jan:630-636

Radiation-induced complications in endovascular neurosurgery: Incidence of skin effects and the feasibility of estimating risk of future tumor formation
Peterson E., Kanal K., Dickinson R., Stewart B., Kim L.
Neurosurgery. 2013 Apr:566-572

SU‐E‐I‐34: Air Kerma to Estimated Entrance Skin Dose Look‐Up Tables: A Tool to Improve Dose Awareness in the Angiography Suite
Dickinson R., Kanal K., Zamora D., Stewart B.
Medical Physics. 2012 Jan:3632

MO‐F‐213CD‐07: Implementation of Dose Monitoring in a Cardiology Department with Independent Medical Reporting Systems
Zamora D., Dickinson R., Kanal K., Stewart B.
Medical Physics. 2012 Jan:3877

TU‐G‐217BCD‐09: Integration of Recent NEMA (MITA) XR‐25 CT Dose‐Check Standard into Clinical Practice
Zamora D., Kanal K., Dickinson R., Shuman W., Stewart B.
Medical Physics. 2012 Jan:3926

MO‐F‐213CD‐06: Implementation of Fluoroscopy Dose Mining and Analysis Process for Continuous Quality Assurance
Stewart B., Zamora D., Dickinson R., Rohrmann C., Kanal K.
Medical Physics. 2012 Jan:3877

MO‐F‐213CD‐05: Establishing a Follow‐Up Process for Angiographic Patients Receiving an Estimated Entrance Skin Dose in Excess of 5 Gy
Kanal K., Dickinson R., Zamora D., Cohen W., Valji K., Stewart B.
Medical Physics. 2012 Jan:3877

Image noise and liver lesion detection with MDCT: A phantom study
Kanal K., Chung J., Wang J., Bhargava P., Kohr J., Shuman W., Stewart B.
American Journal of Roentgenology. 2011 Aug:437-441