Cancer.gov: The Web site of the National Cancer Institute.

ATC coordinates the cooperative effort between ITC, QARC, RTOG, RPC and RCET.
Located at Washington University School of Medicine in St. Louis, Missouri.

ITC provides software tools and data management services for Radiation Oncology clinical trials.
Located at Washington University School of Medicine in St. Louis, Missouri.

RPC assesses radiotherapy programs and assists in developing protocols and QA procedures.
Located at the University of Texas in Houston.

RTOG is comprised of 250 major research institutions in the US and in Canada.
Headquarters in Philadelphia, Pennsylvania.

QARC provides radiotherapy quality assurance and diagnostic imaging data management services.
A University of Massachusetts Medical School program in Providence, Rhode Island.