Canadian radiologist Dr Mark Baerlocher partnered with Tidal Pool Software to develop an iPhone application that estimates a person's exposure to radiation from X-ray machines, CT scans and other known sources, according to a report from medGadget. The app, called Radiation Passport, costs about $3 and crunches metrics the user enters in about their lifestyle and medical tests taken -- then, it provides an exposure and risk assessment.

For more on Radiation Passport be sure to visit the application's info page at Tidal Pool Software's site.