Computed tomography in spontaneous intracerebral haematomas

Area of Science:

• Neuroradiology
• Pathology

Background:

• Intracerebral hematomas present characteristic computed tomographic (CT) findings.
• A low attenuation ring (LAR) typically surrounds recent intracerebral hematomas on CT scans.

Purpose of the Study:

• To investigate the pathology and CT features of recent intracerebral hematomas.
• To explore the significance of the low attenuation ring (LAR) in intracerebral hematomas.

Main Methods:

• Analysis of CT scans of spontaneous intracerebral hematomas.
• Examination of blood samples to assess clot retraction.
• Correlation of CT findings with autopsy observations.

Main Results:

• The low attenuation ring (LAR) corresponds to a zone of ischemic necrosis around the hematoma.
• Extravasated blood clot undergoes significant retraction within six hours.
• The LAR is likely caused by the volume of the pre-contracted hemorrhage impacting surrounding brain tissue.

Conclusions:

• The low attenuation ring (LAR) observed on CT in recent intracerebral hematomas is associated with ischemic necrosis.
• Understanding these CT features aids in distinguishing spontaneous hematomas and assessing prognosis.