Headed To Mars? Watch Out For Cosmic Rays

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Radiation therapist Jean Etienne holds a range compensator, which shapes the depth to which the proton beam enters a patient's body to target a tumor. Rebecca Davis/NPR hide caption

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Rebecca Davis/NPR

Pricey Prostate Cancer Therapy Raises Questions About Safety, Cost

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This illustration shows a device made by MammoSite used to deliver targeted doses of radiation as part of brachytherapy. Courtesy Radiological Society of North America hide caption

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Courtesy Radiological Society of North America

Wider Use Of Breast Cancer Radiation Technique Raises Concern

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