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Super-fine Sound Beam Could One Day Be an Invisible Scalpel

Published: December 20, 2012.
Released by University of Michigan  

ANN ARBOR—A carbon-nanotube-coated lens that converts light to sound can focus high-pressure sound waves to finer points than ever before. The University of Michigan engineering researchers who developed the new therapeutic ultrasound approach say it could lead to an invisible knife for noninvasive surgery.

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More news from University of Michigan

Hurricane Joaquin: Millions Could Lose Power
ANN ARBOR--Power outage forecasts by researchers at the University of Michigan and Texas A&M University show that depending on where hurricane Joaquin makes landfall in the U.S., the lights could go out for as many as 7 million people. The forecasts take into account several different measures of wind speed, storm path and population density by census tract.

New, Ultra-detailed Maps of Great Lakes Recreational Use Will Inform Restoration Priorities
ANN ARBOR--University of Michigan researchers and their colleagues have created exceptionally detailed maps of five Great Lakes recreational activities and say the information can be used to help prioritize restoration projects.

'Tree of Life' for 2.3 Million Species Released; U-M Plays Key Role in Project
ANN ARBOR--A first draft of the "tree of life" for the roughly 2.3 million named species of animals, plants, fungi and microbes has been released, and two University of Michigan biologists played a key role in its creation. A collaborative effort among 11 institutions, the tree depicts the relationships among living things as they diverged from one another over time, tracing back to the beginning of life on Earth more than 3.5 billion years ago.

Yeast Study Yields Insights into Cell-division Cycle
ANN ARBOR--Studies using yeast genetics have provided new, fundamental insights into the cell-division cycle, researchers at the University of Michigan Life Sciences Institute report. Findings published Aug. 31 in the journal eLife show that an organelle known as the vacuole, which performs a variety of cellular housekeeping functions, plays an essential role in the initiation of the cell-division cycle.

Daily Marijuana Use among US College Students Highest Since 1980
ANN ARBOR--Daily marijuana use among the nation's college students is on the rise, surpassing daily cigarette smoking for the first time in 2014. A series of national surveys of U.S. college students, as part of the University of Michigan's Monitoring the Future study, shows that marijuana use has been growing slowly on the nation's campuses since 2006.

Passion for Your Job? If Not, It's Attainable
ANN ARBOR--People who have not found their perfect fit in a career can take heart: There is more than one way to attain passion for work. Contrary to popular wisdom, a love-at first-sight experience is not necessary when evaluating a potential job, according to a new University of Michigan study.

More Secondary Schools Serve Healthier Lunches
ANN ARBOR--Secondary students found healthier foods on more lunch menus in 2013 than in 2011, resulting in fewer nutrition disparities for small schools or those with racially diverse student bodies. The findings by University of Michigan researchers show significant improvements made in the National School Lunch Program at public middle and high schools in 2013 after many years of meal disparities based on school size or demographics.

Teens with Medical Marijuana Cards Much Likelier to Say They're Addicted
ANN ARBOR--A new University of Michigan study finds that teens using marijuana for medical reasons are 10 times more likely to say they are hooked on marijuana than youth who get marijuana illegally. The study is the first to report on a nationally representative sample of 4,394 high school seniors and their legal or illegal medical marijuana use as it relates to other drug use. In the study, 48 teens had medical marijuana cards, but 266 teens used medical marijuana without a card.

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Doctor Who's Trusty Invention Is Anything but Sci-fi
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New Technique Paints Tissue Samples with Light
CHAMPAIGN, Ill. -- One infrared scan can give pathologists a window into the structures and molecules inside tissues and …
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