Magnetic resonance imaging of hemorrhagic cerebral infarction

Area of Science:

• Neuroimaging
• Radiology
• Cerebrovascular Diseases

Background:

• Hemorrhage into cerebral infarction is a common complication.
• Accurate detection of hemorrhagic transformation is crucial for patient management.
• Distinguishing between acute and chronic hemorrhage aids in diagnosis.

Purpose of the Study:

• To compare the sensitivity of magnetic resonance (MR) imaging and computed tomography (CT) in detecting subacute and chronic hemorrhage within cerebral infarcts.
• To characterize the imaging appearance of hemorrhagic infarction on MR and CT.
• To identify imaging markers for previous hemorrhage in cerebral infarcts.

Main Methods:

• Comparative study design.
• Utilized magnetic resonance (MR) imaging and computed tomography (CT) for patient assessment.
• Analyzed signal characteristics on T1-weighted and T2-weighted MR images.
• Examined the pattern of cortical hemorrhagic infarction.

Main Results:

• MR imaging demonstrated higher sensitivity than CT for detecting subacute and chronic hemorrhage in cerebral infarction.
• Hemorrhage appearance varied with age: high signal on T1-weighted images or low signal on T2-weighted images.
• Cortical hemorrhagic infarction exhibited a distinct gyral pattern.
• Methemoglobin and hemosiderin were identified as markers of prior hemorrhage.

Conclusions:

• MR imaging is superior to CT for identifying past hemorrhagic events in cerebral infarction.
• Specific MR signal characteristics and patterns aid in the diagnosis of hemorrhagic infarction.
• Methemoglobin and hemosiderin on MR imaging are reliable indicators of previous hemorrhage.