Stroke is a leading cause of death and serious long-term disability in the United States, according to the Centers for Disease Control and Prevention and the American Stroke Association. During Stroke Awareness Month, understanding how quickly a stroke can damage the brain highlights why recognizing warning signs and acting fast is critical, a concept often summarized as “Time is Brain.
“It’s more than a slogan — it’s a literal clinical calculation. Patients and families have a key role in the outcome.” — Dr. Edward Greenberg, FRC Neuroradiologist
What Does “Time Is Brain” Really Mean?
When a stroke interrupts blood flow to the brain, brain cells begin to die within minutes. The phrase “Time is Brain” reflects the rapid, irreversible loss of neural tissue that occurs during a stroke.
Research published in the journal Stroke estimates that for every hour a stroke goes untreated, the brain ages approximately 3.6 years in terms of cognitive and physical function.
This is why recognizing symptoms and calling 9-1-1 immediately is critical.
Stroke Is an Emergency — But Prevention Starts Earlier
While acute stroke requires immediate emergency care, many strokes are linked to underlying vascular disease that develops over time. Identifying risk factors early can make a life-saving difference.
Common stroke risk factors include:
• High blood pressure
• High cholesterol
• Diabetes
• Heart disease
• Smoking
• Prior stroke or transient ischemic attack (TIA)
• Age over 55
Advanced imaging plays a crucial role in detecting problems before symptoms appear.
Imaging That Helps Assess Stroke Risk
At Fairfax Radiology Centers, specialized imaging allows physicians to evaluate the blood vessels that supply the brain and detect conditions that may increase stroke risk.
Carotid Ultrasound: A Non-Invasive First Step
A carotid ultrasound examines the carotid arteries in the neck, which deliver blood to the brain. Over time, plaque buildup can narrow these arteries, increasing the risk of stroke.
This exam is:
• Quick and painless
• Non-invasive (no needles or radiation)
• Able to detect narrowing before symptoms occur
For many patients, it serves as an important first step in evaluating vascular health.
Advanced MRI and MRA: Detailed Brain and Vessel Imaging
Magnetic Resonance Imaging (MRI) and Magnetic Resonance Angiography (MRA) provide highly detailed views of the brain and its blood vessels.
These advanced studies can:
• Detect prior “silent” strokes
• Identify abnormalities in brain tissue
• Visualize blood flow and vessel structure
• Evaluate aneurysms or other vascular conditions
Because MRI uses magnetic fields rather than radiation, it is a powerful tool for comprehensive neurological assessment.
Why Specialized Imaging Matters
Interpreting brain and vascular imaging requires deep expertise. Subspecialty-trained radiologists analyze subtle findings that can influence diagnosis, treatment planning, and long-term prevention strategies.
Early detection allows physicians to recommend interventions such as medication management, lifestyle changes, or additional monitoring, all aimed at reducing the likelihood of a future stroke.
Know the Signs. Understand Your Risk. Act Quickly.
Even with preventive care, stroke can occur suddenly. Seek emergency medical help immediately if you experience symptoms such as:
• Sudden weakness or numbness on one side of the body
• Difficulty speaking or understanding speech
• Vision problems
• Loss of balance or coordination
• Severe headache with no known cause
Prompt treatment can significantly improve outcomes.
Taking a Proactive Approach to Brain Health
Stroke prevention is not just about reacting to symptoms; it is about understanding risk and using modern medical tools to stay ahead of disease.
Specialized imaging provides critical insight into vascular health and brain function, empowering patients and physicians to make informed decisions.
If you have risk factors for stroke or concerns about your neurological health, talk with your physician about whether vascular or brain imaging is appropriate for you.