Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

CT venography increases detection of dangerous blood clots

25.01.2005


Recurring blood clots in the lungs could be prevented with computed tomography (CT) scans of the legs, according to a study in the February issue of the journal Radiology.

Researchers found that indirect CT venography (CTV) could identify blood clots in the legs that have the potential to break free, travel to the lung and block an artery--a life-threatening condition known as pulmonary embolism. Pulmonary emboli and blood clots in the legs, also called deep vein thrombosis, are both manifestations of thromboembolic disease.

CT pulmonary angiography (CTPA), a type of lung scan, is commonly used to detect the presence of blood clots in the lung. But because many clots in smaller arteries are not visible on this lung scan, thromboembolic disease may go undiagnosed in some patients. Indirect CTV can help identify a blood clot problem. "Studies have shown that inadequately treated deep vein thrombosis is associated with recurring pulmonary emboli," said lead author, Matthew D. Cham, M.D., a radiology resident at the University of Rochester School of Medicine and Dentistry in Rochester, New York.



In a large-scale study, Dr. Cham and colleagues, David F. Yankelevitz, M.D., and Claudia I. Henschke, Ph.D., M.D., from New York Presbyterian Hospital–Weill Medical College at Cornell University in New York City, found that performing CTV in addition to CTPA increased the detection rate of thromboembolic disease by 20 percent. Each year, more than 600,000 people in the United States suffer from pulmonary embolism, and more than 60,000 of them die, according to the National Heart, Lung and Blood Institute. Most pulmonary emboli occur when a blood clot in the leg breaks free and travels to the lung.

The researchers studied 1,590 consecutive patients undergoing both CTPA and CTV at New York Presbyterian Hospital–Weill Medical College at Cornell University for suspected pulmonary embolism between 1998 and 2001. CTPA detected pulmonary embolism in 15 percent, or 243 patients. CTV detected deep vein thrombosis in 148, or 9 percent, of patients. Of those 148 patients, only 100 had been diagnosed with pulmonary embolism by CTPA.

The addition of indirect CTV following a CTPA exam requires no additional contrast material and only three minutes to perform. In both the CTV and CTPA, a series of x-ray beams is directed through the body from different angles, creating cross-sectional views of the body that are assembled by computer into a stack of pictures that can be rapidly viewed like flipping though a deck of cards.

"Combining CTV with CTPA also eliminates the need for a separate lower extremity examination that can further delay diagnosis," Dr. Cham said.

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

More articles from Health and Medicine:

nachricht 3D images of cancer cells in the body: Medical physicists from Halle present new method
16.05.2018 | Martin-Luther-Universität Halle-Wittenberg

nachricht Better equipped in the fight against lung cancer
16.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

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: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>