From Business Insider:
-  A brush with death inspired ex-Facebook and Google executive  Mary Lou Jepsen to embark on her latest initiative as the founder of a San Francisco-based startup called Openwater.     
- 
 Jepsen is working on devices that are akin to portable, miniature MRIs 
which could do everything from observing the effects of a medication in 
real time to monitoring a breast cancer tumor to decide if surgery is 
necessary.     
-  Her startup is currently running experiments on rats in a lab in the San Francisco area, she told Business Insider.     
 Former Google and Facebook executive 
 Mary Lou Jepsen
 was in her 20s when she went home to die. What began with terrible 
headaches developed into fatigue so severe she had to use a wheelchair. 
She'd lost control of movement in half of her face. 
 It 
took several months and a handful of doctors before someone recommended 
that Jepsen get an MRI — a procedure that that lets clinicians peek 
inside the brain, but that can cost thousands of dollars and is 
performed exclusively on a two-ton machine in a special room, often at a
 hospital. The pricey devices use radio waves and strong magnets to 
create pictures of organs and structures inside the body. 
 Thanks to Jepsen's MRI, she was diagnosed with a deadly brain tumor just in time to save her life. 
 Jepsen's brush with death drove her to create a startup called Openwater. 
Its mission is to make portable, miniature imaging machines that 
everyone can afford — machines that she dreams will one day harbor the 
power to do everything from detect tumors in any organ to allow for 
brain-to-brain communication. If it works, her technology could disrupt 
the roughly 
 $6 billion annual MRI market. ...
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