Council of Affiliated Regional Radiation Oncology Societies (CARROS)

About Us

The Council of Affiliated Regional Radiation Oncology Societies (CARROS) was jointly founded by the American College of Radiology (ACR) and the American Society for Therapeutic Radiology and Oncology (ASTRO) in 1978. Since 1986, CARROS has been a chapter of the ACR serving to promote activity in radiation oncology through the ACR at the local and regional level. Additionally, CARROS -

  • Serves as a mechanism to develop consensus on issues in radiation oncology and to transmit information to CARROS members and to the parent organizations;
  • Provides the radiation oncology membership of the ACR with a dedicated seat on the ACR Council, and
  • Provides a pathway to Fellowship in the ACR for radiation oncology and medical physics members.

Membership in CARROS

Individuals: All ACR members who are radiation oncologists or medical physicists in the practice of radiation oncology are members of CARROS; they are also members of their ACR state chapters (based on where they work or practice).

Constituent Organizations: Organizations recognized as chapters of the ACR are considered “constituent” organizations. Other formally organized societies or groups of radiation oncologists that represent a defined geographic area or demographic group are also “constituent” organizations. Constituent organizations have representation on the CARROS Board of Representatives.

CARROS Membership Benefits

  • You are part of a network of radiation oncology members
  • You will be kept informed about socioeconomic and governmental actions and developments relevant to the clinical practice of radiation oncology
  • You will be asked for your input on major issues affecting radiation oncology
  • You will be included in the process to develop ACR Practice Parameters and Technical Standards
  • You have a CARROS representative (Councilor) who is a voting member on the ACR Council; through this representative you have a voice and a vote on resolutions presented at the ACR Annual Meeting.
  • The resources and influence of the ACR can be applied to issues important to radiation oncology
    CARROS is a pathway to Fellowship in the ACR for physicians and medical physicists in radiation oncology (it is an alternative to your state chapter pathway).

Alan C. Hartford, MD, PhD, FACR

Iris C. Gibbs, MD, FACR

Laeton J. Pang, MD, MPH, FACR

Trina Behbahani


Alan Hartford


Iris Gibbs

President Elect

Laeton Pang



Immediate Past President

Simon Lo

Fellowship Chair

Trina Behbahani


Chapter Awards

Division A
Award for Excellence in Membership
Division A
Award for Excellence in Membership
Division A
Award for Excellence in Membership
Division A
Award for Excellence in Membership

Upcoming Meetings & Events

Chapter News

New from CARROS – Rad Onc Webinars

CARROS is launching quarterly webinars to connect our community and update you on the latest topic in radiation oncology. The first webinar launches January 8, 2020.
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