The American Society for Therapeutic Radiology and Oncology has created several brochures to help patients better understand how radiation therapy works to treat cancer and other diseases. Each of the brochures can be downloaded for free from the patient section of the ASTRO Web site, located at http://www.astro.org/patient/. Printed copies of the brochures are also available for sale at reduced rates. Visit the ASTRO store located online at http://www.astro.org/publications/products_to_improve_your_practice/ to order the materials online or print out an order form.