Computed Tomography Perfusion Improves Diagnostic Accuracy in Acute Posterior Circulation Stroke
Peter Sporns1, Rene Schmidt, Jens Minnerup
1Department of Clinical Radiology, University Hospital of Muenster, Muenster, Germany.
Cerebrovascular Diseases (Basel, Switzerland)
|January 29, 2016
Summary
Computed tomography perfusion (CTP) significantly improves the detection of posterior circulation (PC) ischemic strokes compared to non-contrast CT and CT angiography alone. This advanced imaging technique offers higher sensitivity for identifying PC strokes, aiding in timely diagnosis and treatment.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Computed tomography perfusion (CTP) is valuable for anterior circulation ischemic stroke but its role in posterior circulation (PC) stroke is unclear.
- Whole brain volume perfusion is not widely utilized for PC stroke diagnosis.
Purpose of the Study:
- To evaluate the added diagnostic value of whole brain volume CTP to non-contrast CT (NCCT) and CT angiography source images (CTA-SI) for detecting infarcts in suspected acute ischemic PC stroke.
Main Methods:
- Retrospective review of 3,011 stroke patients with suspected PC stroke undergoing NCCT, CTA, and CTP within 9 hours of onset.
- Comparison of three imaging models (NCCT alone, NCCT + CTA-SI, NCCT + CTA-SI + CTP) against follow-up imaging as the gold standard.
- Statistical analysis using McNemar's test to compare misclassification rates.
Main Results:
- Out of 267 patients with suspected PC stroke, 188 (70.4%) had confirmed PC infarcts.
- Model C (NCCT + CTA-SI + CTP) demonstrated higher sensitivity (76.6%) compared to Model A (21.3%) and Model B (43.6%).
- CTP identified significantly more ischemic lesions, particularly in the cerebellum, posterior cerebral artery territory, and thalami.
Conclusions:
- CTP significantly enhances the detection of ischemic strokes in the posterior circulation compared to CTA and NCCT alone.
- Whole brain volume CTP provides substantial additional diagnostic value in suspected acute ischemic PC stroke.
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