Podcast
Questions and Answers
Why is it recommended to perform an MRI with gadolinium enhancement within 2 days of an ictus?
Why is it recommended to perform an MRI with gadolinium enhancement within 2 days of an ictus?
- Performing the MRI later than 2 days increases the risk of adverse reactions to gadolinium.
- After 2 days, the blood becomes hyperintense on T1-weighted images, potentially obscuring the visualization of gadolinium enhancement. (correct)
- The presence of amyloid can only be detected within the first 48 hours post-ictus.
- Gadolinium is only effective in visualizing the acute phase of the hemorrhage.
In the context of intracerebral hemorrhage, what is the primary reason for avoiding immediate MRI scans?
In the context of intracerebral hemorrhage, what is the primary reason for avoiding immediate MRI scans?
- Immediate MRI scans are generally contraindicated due to the unstable nature of the hemorrhage.
- Logistic constraints often delay immediate MRI. (correct)
- CT scans are always superior to MRI in the acute setting of intracerebral hemorrhage.
- To minimize patient exposure to radiation.
What type of MRI is sufficient if the goal is to search for amyloid deposits in the context of intracerebral hemorrhage?
What type of MRI is sufficient if the goal is to search for amyloid deposits in the context of intracerebral hemorrhage?
- Non-gadolinium enhanced MRI (correct)
- Diffusion-weighted MRI (DWI)
- T1-weighted MRI with gadolinium enhancement
- T2-weighted MRI with gadolinium enhancement
A patient presents with suspected intracerebral hemorrhage. An MRI with gadolinium enhancement is planned. What is the critical time window to optimize the imaging based on the content?
A patient presents with suspected intracerebral hemorrhage. An MRI with gadolinium enhancement is planned. What is the critical time window to optimize the imaging based on the content?
A physician orders an MRI to assess a patient who had an ictus four days prior. The MRI reveals hyperintensity in the affected area on T1-weighted images. How does this impact the utility of gadolinium enhancement?
A physician orders an MRI to assess a patient who had an ictus four days prior. The MRI reveals hyperintensity in the affected area on T1-weighted images. How does this impact the utility of gadolinium enhancement?
What is the most appropriate imaging technique to use initially when time is of the essence?
What is the most appropriate imaging technique to use initially when time is of the essence?
When would a non-gadolinium enhanced MRI be sufficient following an ictus?
When would a non-gadolinium enhanced MRI be sufficient following an ictus?
A patient with a history of stroke comes to the emergency room for a suspected second stroke. When should an MRI be performed?
A patient with a history of stroke comes to the emergency room for a suspected second stroke. When should an MRI be performed?
What contributes to the time delay of obtaining an MRI?
What contributes to the time delay of obtaining an MRI?
A patient with a known history of amyloid deposits in the brain presents to the emergency department with symptoms suggestive of acute stroke. Which imaging strategy is MOST appropriate for the initial evaluation, considering both the need to assess for acute stroke and the pre-existing amyloid?
A patient with a known history of amyloid deposits in the brain presents to the emergency department with symptoms suggestive of acute stroke. Which imaging strategy is MOST appropriate for the initial evaluation, considering both the need to assess for acute stroke and the pre-existing amyloid?
Flashcards
MRI after Stroke
MRI after Stroke
Imaging technique used to visualize the brain after a stroke.
Gadolinium
Gadolinium
Contrast agent used in MRI to enhance visibility of certain tissues.
Hyperintense on T1
Hyperintense on T1
Descriptive term for how blood appears on T1-weighted MRI images after a stroke.
Amyloid
Amyloid
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MRI Timing Post-Ictus
MRI Timing Post-Ictus
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Study Notes
- MRI is typically not performed immediately due to logistics.
- If gadolinium is to be administered, MRI should be performed within 2 days of ictus.
- After 2 days, blood becomes hyperintense on T1, which obscures visualization when gadolinium is administered.
- A non-gadolinium enhanced MRI is sufficient when searching for amyloid.
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