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CT and MR imaging of chronic subdural hematomas: a comparative study
Senem Senturk1, Aslan Guzel, Aslan Bilici
1Department of Radiology, School of Medicine, Dicle University, Diyarbakir, Turkey. snmsenturk@gmail.com
Swiss Medical Weekly
|March 30, 2010
Summary
Magnetic resonance imaging (MRI) is more sensitive than computed tomography (CT) for visualizing chronic subdural hematomas and their internal structures, including membranes.
Area of Science:
- Neuroradiology
- Medical Imaging
- Neurosurgery
Background:
- Chronic subdural hematomas (CSHs) are collections of blood that can cause neurological symptoms.
- Accurate imaging is crucial for diagnosis and treatment planning of CSHs.
Purpose of the Study:
- To compare the effectiveness of computed tomography (CT) and magnetic resonance (MR) imaging in evaluating chronic subdural hematomas (CSHs).
- To assess the accuracy of CT and MR in measuring the thickness of CSHs and identifying internal structures like membranes.
Main Methods:
- Retrospective review of CT and MR images from 34 patients with 48 CSHs.
- Comparison of imaging characteristics and thickness measurements between CT and MR modalities.
Main Results:
- MR imaging delineated intrahaematomal membranes in 100% of cases, compared to only 27% with CT.
- Levelling phenomenon observed in 25% of CSHs, often associated with membranes.
- CSHs were measured significantly thicker on MR images than on CT scans.
- Mixed density and T1 hyperintensity were common in membraned CSHs on MR, though not statistically significant.
Conclusions:
- MR imaging demonstrates superior sensitivity compared to CT for characterizing the size and internal complexity of CSHs.
- MR imaging is more effective in visualizing intrahaematomal membranes, which are important for understanding CSHs.
