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[MR imaging of acute hemorrhagic brain infarction]
Abstract:
Six patients with acute hemorrhagic brain infarct were imaged using spin-echo (SE) pulse sequences on a 1.5 Tesla MR scanner. Including two patients with repeated MR imaging, a total of eight examinations, all performed within 15 days after stroke, were analyzed retrospectively. Four patients revealed massive hemorrhages in the basal ganglia or cerebellum and three cases demonstrated multiple linear hemorrhages in the cerebral cortex. On T1-weighted images, hemorrhages were either mildly or definitely hyperintense relative to gray matter, while varied from mildly hypointense to hyperintense on T2-weighted images. T1-weighted images were superior to T2-weighted images in detection of hemorrhage. CT failed to detect hemorrhages in two of five cases: indicative of MR superiority to CT in the diagnosis of acute hemorrhagic infarcts.
Insights
Magnetic Resonance (MR) imaging, specifically T1-weighted sequences, effectively detects acute hemorrhagic brain infarcts. MR demonstrated superiority over CT in identifying hemorrhages within 15 days post-stroke.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Acute hemorrhagic brain infarcts present diagnostic challenges.
- Early detection is crucial for appropriate patient management and treatment.
- Conventional imaging modalities may have limitations in visualizing acute hemorrhage.
Purpose of the Study:
- To evaluate the efficacy of spin-echo (SE) Magnetic Resonance (MR) imaging sequences in detecting acute hemorrhagic brain infarcts.
- To compare the diagnostic performance of T1-weighted and T2-weighted MR images for hemorrhage detection.
- To assess the superiority of MR imaging over Computed Tomography (CT) in diagnosing acute hemorrhagic infarcts.
Main Methods:
- Retrospective analysis of eight MR imaging examinations from six patients with acute hemorrhagic brain infarcts.
- Examinations were performed using spin-echo (SE) pulse sequences on a 1.5 Tesla MR scanner within 15 days post-stroke.
- Comparison of hemorrhage detection between T1-weighted and T2-weighted MR images, and with CT findings in five cases.
Main Results:
- Hemorrhages were detected in the basal ganglia, cerebellum, and cerebral cortex.
- On T1-weighted images, hemorrhages appeared hyperintense relative to gray matter.
- T1-weighted MR images were superior to T2-weighted images in detecting hemorrhage; CT failed in two of five cases.
Conclusions:
- Spin-echo MR imaging, particularly T1-weighted sequences, is highly effective in diagnosing acute hemorrhagic brain infarcts.
- MR imaging demonstrates superior sensitivity compared to CT for detecting acute hemorrhages.
- Early MR imaging is recommended for accurate diagnosis of hemorrhagic stroke.