How many calories in that bite? My Fitness Pal and other fitness and nutrition apps can help find the answer. Heather Rousseau/NPR hide caption

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A construction worker paints walls at the Maryland Proton Treatment Center in Baltimore. Each of the center's five rooms will contain a massive piece of equipment that will rotate around a cancer patient to deliver a special kind of radiation. Jenny Gold/Kaiser Health News hide caption

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Kaiba Gionfriddo, who breathes with help from a splint created by a 3-D printer, plays with his family dog, Bandit, at his Youngstown, Ohio, home. Mark Stahl/AP hide caption

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An angiogram of a 48-year- old patient after treatment for a stroke. A blockage was targeted with clot-busting drugs using a catheter. Zephyr/Science Source hide caption

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Lt. Cmdr. Stephen Mannino checks a sailor for skin cancer the old-fashioned way during a screening exam at Naval Amphibious Base Coronado in San Diego. MC2 Dominique M. Lasco/U.S. Navy hide caption

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A cross-sectional X-ray shows what's called a "sunken chest." The bright circle near the bottom is the spine; the gray blob on the right is the heart. Living LLC/Getty Images hide caption

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Hugo Campos' implantable cardioverter-defibrillator was a mystery to him. So he decided to ask his doctor for access to the data. He made this image with one of his own X-rays. Hugo Campos hide caption

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