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What is on-board imaging (OBI) for radiation therapy?

On-board imaging (OBI) refers to the use of daily x-rays (taken right on the linear accelerator) that help to confirm a match of treatment setup to the planned treatment. Radiation treatment is designed to be very precise, and these images, taken just prior to treatment, allow the radiation therapist to correct for any daily treatment setup variation. OBI improves the accuracy of treatment and may allow the radiation oncologist to use smaller radiation treatment fields, reducing your risk of side effects.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.