Dr. Susan D. John is an internationally known pediatric radiologist who is currently Professor and Chair of the Department of Diagnostic and Interventional Imaging at the University of Texas McGovern Medical School at Houston. She is Chief of Adult and Pediatric Imaging Services at Memorial Hermann Hospital TMC, Children’s Memorial Hermann Hospital and Lyndon B. Johnson General Hospital in Houston, Texas. She holds the John S. Dunn Distinguished Chair in Radiology at UT McGovern Medical School Houston since 2004.

In 1998, Dr. John was recruited to UT Houston Medical School as Chief of Pediatric Radiology, bringing state of the art imaging for infants and children to Children’s Memorial Hermann Hospital.  She expanded services locally to include imaging at Shriner’s Orthopedic Hospital for Children.  She was promoted to Professor with Tenure in 2001, and subsequently, appointed Chair of the Department of Diagnostic and Interventional Imaging in 2004.

Dr. John’s dedication to patient-centered care, quality, and safety caused her to become increasingly engaged in leadership roles in the Memorial Hermann Hospital System.  She is currently Chief of Staff at Memorial Hermann Hospital-TMC.  She consistently promotes the value of interdisciplinary collaborations in the hospital and the medical school and has worked to improve communication between radiologists, referring physicians, and patients.

Dr. John is a renowned leader and educator in the subspecialty of Pediatric Radiology.  She authored and co-authored more than 100 journal articles, books, and book chapters.  Dr. John’s scholarly activities primarily involve emergency imaging in children, with an emphasis on gastrointestinal emergencies, respiratory infections, child abuse, and musculoskeletal injuries. Her relaxed and practical lecture style has made her a popular speaker at numerous national and international scientific meetings and educational courses on topics in pediatric and emergency imaging.

She is a passionate advocate of personalized care in Radiology, with a special focus on the imaging of children.  She has been a leader in national initiatives to increase appropriateness of diagnostic imaging and reduce unnecessary radiation exposure in pediatric imaging for many years.  She served on the Alliance for Radiation Safety in Pediatric Imaging Steering Committee and was co-chair of the Image Gently subcommittee that created the Radiation Safety Checklist for radiologic technologists performing digital radiography in children.

The primary focus of Dr. John’s research is pediatric acute care imaging.  She is recognized as an authority on the imaging of abdominal emergencies and extremity injuries in children.  She publishes and advocates for judicious, evidence-based use of imaging in pediatric trauma and emergency care.  Dr. John is an expert in imaging of child abuse and collaborates with investigators at the Harris County Institute of Forensic Sciences on research to improve diagnosis of non-accidental trauma in infants.  She has worked with industry to develop and improve low dose systems for computed radiography.


American Board of Radiology, 1988
Certificate of Added Qualifications in Pediatric Radiology, 1995
American Board of Radiology
Maintenance of Certification in Pediatric Radiology, 2005, 2015
American Board of Radiology


St. Luke's Episcopal Hospital, Houston, TX 1975
Medical Degree
University of Texas Medical Branch, Galveston, TX, 1984
Department of Radiology, University of Texas Medical Branch, Galveston, TX, 1988
Pediatric Radiology, University of Texas Medical Branch, Galveston, TX, 1989

Areas of Interest

Research Interests

  1. Co-Investigator: Texas Forensic Assessment Venture – Texas Department of Family and Protective Services/Children’s Protective Services (CPS) and the University of Texas System Medical Schools. (Radiology Review) – PI: Rebecca Girardet, M.D. (2006-present)
  2. Principal Investigator: Pediatric Low Dose PI: Susan John, MD: Co-PI: Roy Riascos
    Funding Agency: Samsung Electronics Co, Ltd. Award Period: 10-2018 to 4-2019
    Amount: 65682.29 Validation of a new post image processing engine (S-Vue™) for the reduction
    of ionizing radiation dose on X-ray examination in pediatric patients.