Lighting up Lungs
Magnetic-resonance imaging has dramatically improved doctors’ views of the body. But obtaining clear pictures of the lungs has been a struggle. Now researchers at Harvard Medical School have found a way to make these MRIs crystal clear.
In an experimental procedure for performing lung MRIs, a patient takes a breath of polarized helium, which naturally spreads through the lungs’ branching airways to the oxygen-filtering sacs at their ends. The gas becomes magnetized and highlights the airways in the scan-but the sacs light up, too, which largely blocks the view. The Harvard researchers have improved upon this method: hyperpolarized helium is administered as the patient inhales for several seconds, while the MRI scanner records a series of images of the gas spreading through the airways. Radio-frequency pulses from the scanner also depolarize the helium that reaches the air sacs-producing clear images of just the airways. The technique could aid diagnoses of asthma and cystic fibrosis. Durham, NC-based startup Polarean is commercializing polarization systems that will enable these types of MRIs; the company plans to pursue FDA approval starting in 2005.
Keep Reading
Most Popular
Large language models can do jaw-dropping things. But nobody knows exactly why.
And that's a problem. Figuring it out is one of the biggest scientific puzzles of our time and a crucial step towards controlling more powerful future models.
The problem with plug-in hybrids? Their drivers.
Plug-in hybrids are often sold as a transition to EVs, but new data from Europe shows we’re still underestimating the emissions they produce.
How scientists traced a mysterious covid case back to six toilets
When wastewater surveillance turns into a hunt for a single infected individual, the ethics get tricky.
Google DeepMind’s new generative model makes Super Mario–like games from scratch
Genie learns how to control games by watching hours and hours of video. It could help train next-gen robots too.
Stay connected
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.