New Guideline: MRI Better Than CT Scans at Diagnosing Stroke

“While CT scans are currently the standard test used to diagnose stroke, the Academy’s guideline found that MRI scans are better at detecting ischemic stroke damage compared to CT scans,” said lead guideline author Peter Schellinger, MD, with the Johannes Wesling Clinical Center in Minden, Germany.

A majority of strokes are ischemic, caused by lack of blood flow in the brain, usually due to a blockage or a blood clot. The window for treatment to reverse the damage from an ischemic stroke is measured in hours.

CT scans are a specialized kind of X-ray taken of the brain while MRI uses magnets and radio waves that show clearer images of brain tissue. Diffusion MRI measures molecular water motion in the tissue, showing where water diffusion is restricted and therefore brain damage has occurred.

According to the guideline, diffusion MRI should be considered more useful than a CT scan for diagnosing acute ischemic stroke within 12 hours of a person’s first stroke symptom. In one large study, among others, that was reviewed for the guideline, stroke was accurately detected 83 percent of the time by MRI versus 26 percent of the time by CT.

“Specific types of MRI scans can help reveal how severe some types of stroke are. These scans also may help find lesions early,” Schellinger said. “This is important because the research suggests finding lesions early may lead to better health outcomes.”

In addition, the guideline found MRI scans more accurately detected lesions from stroke and helped identify the severity of some types of stroke or diagnose other medical conditions with similar symptoms. Schellinger says studies have proven the importance of using MRI in emergency rooms but says doubts still exist surrounding the use of stroke MRI scans in clinical settings. “This guideline gives doctors clear direction in using MRI first, ultimately helping people get an acute stroke diagnosis and treatment faster. However, one situation in which CT may still be used first is when a person needs an emergency injection of drug therapy (also known as intravenous thrombolytic therapy) to break up blood clots, if MRI is not immediately available, to avoid delays in starting this treatment. MRI can be added later if more information is needed. Otherwise MRI should be used first.”

Stroke is the third leading cause of death and the leading cause of permanent disability in the United States.

The American Academy of Neurology, an association of more than 22,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Parkinson’s disease, ALS (Lou Gehrig’s disease), dementia, multiple sclerosis and stroke.

Media Contact

Rachel L. Seroka American Academy of Neurology

More Information:

http://www.aan.com

All latest news from the category: Medical Engineering

The development of medical equipment, products and technical procedures is characterized by high research and development costs in a variety of fields related to the study of human medicine.

innovations-report provides informative and stimulating reports and articles on topics ranging from imaging processes, cell and tissue techniques, optical techniques, implants, orthopedic aids, clinical and medical office equipment, dialysis systems and x-ray/radiation monitoring devices to endoscopy, ultrasound, surgical techniques, and dental materials.

Back to home

Comments (0)

Write a comment

Newest articles

The Sound of the Perfect Coating

Fraunhofer IWS Transfers Laser-based Sound Analysis of Surfaces into Industrial Practice with “LAwave”. Sound waves can reveal surface properties. Parameters such as surface or coating quality of components can be…

Customized silicon chips

…from Saxony for material characterization of printed electronics. How efficient are new materials? Does changing the properties lead to better conductivity? The Fraunhofer Institute for Photonic Microsystems IPMS develops and…

Acetylation: a Time-Keeper of glucocorticoid Sensitivity

Understanding the regulatory mechanism paves the way to enhance the effectiveness of anti-inflammatory therapies and to develop strategies to counteract the negative effects of stress- and age-related cortisol excess. The…

Partners & Sponsors