Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New ultrafast MRI benefits stroke patients

02.12.2003


A new magnetic resonance imaging (MRI) technology reduces brain-imaging time from 20 minutes to three minutes while maintaining accuracy and decreasing patient discomfort, according to early research results presented at the 89th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA).



"The three-minute head scan is as good as the 20-minute version, and in some instances better because stroke patients may be distressed and move around," said study co-author, Jonathan H. Gillard, M.D. "Pictures taken in a shorter period of time are less susceptible to degradation from the patient moving during the scan." Dr. Gillard is a lecturer and honorary consultant neuroradiologist at Addenbrooke’s Hospital, University of Cambridge in England, where the study is ongoing.

To be successful, treatment with intravenous thrombolytic (clot-busting) drugs must typically begin within three hours after stroke onset. Interventional radiology has increased the critical treatment window through the use of catheters that deliver the drugs directly to the clot in the brain, but every minute counts. Therefore, it is essential that stroke patients be diagnosed quickly, so that treatment can begin. Computed tomography (CT) is the usual method for diagnosing stroke, because it only takes a few minutes, compared to 20 minutes with conventional MRI. However, unlike MRI, CT does not identify the parts of the brain that are at risk of damage.


The researchers studied 24 patients with clinical diagnosis of probable acute middle cerebral artery stroke to compare images obtained with conventional MRI and with the three-minute protocol using new multi-channel, phased-array brain coils, which can produce the same number of images in a fraction of the time. Overall, the two protocols were comparable in image quality and diagnostic results. However, two of the three-minute protocol images were of better quality than the conventional images, because the faster imaging eliminated complications from patient movement. The three-minute protocol also correctly identified blockage for treatment with clot-busting drugs.

"The conventional 20-minute MRI may be distressing for patients who are already agitated by stroke symptoms, such as a weak arm or leg or a speech deficit," Dr. Gillard said. "Despite the machine noise and possible claustrophobia, agitated patients are more likely to remain still during a quick procedure than a lengthy one."

Stroke is the third leading cause of death in the United States, killing nearly 160,000 Americans annually, according to the National Center for Health Statistics. The National Institute of Neurologic Disorders and Stroke reports that more than 700,000 Americans have a new or recurrent stroke each year.

"The three-minute protocol is a tremendous technological advance that positively impacts patients," Dr. Gillard said. "These multi-channel, phased-array brain coils were all but inconceivable a few years ago."

Co-authors of the paper being presented by Dr. Gillard are Jean M. U-King-Im, M.R.C.S., Rikin A. Trivedi, M.R.C.P., M.R.C.S., Martin J. Graves, M.Sc., Kirsty Harkness, M.R.C.P., and Hayley Eales.


RSNA is an association of more than 35,000 radiologists, radiation oncologists and related scientists committed to promoting excellence in radiology through education and by fostering research, with the ultimate goal of improving patient care. The Society is based in Oak Brook, Ill.

Maureen Morley | EurekAlert!
Further information:
http://www.rsna.org/press03

More articles from Health and Medicine:

nachricht Penn study identifies new malaria parasites in wild bonobos
21.11.2017 | University of Pennsylvania School of Medicine

nachricht NIST scientists discover how to switch liver cancer cell growth from 2-D to 3-D structures
17.11.2017 | National Institute of Standards and Technology (NIST)

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

From Hannover around the world and to the Mars: LZH delivers laser for ExoMars 2020

21.11.2017 | Physics and Astronomy

Borophene shines alone as 2-D plasmonic material

21.11.2017 | Materials Sciences

Penn study identifies new malaria parasites in wild bonobos

21.11.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>