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Diffusion-weighted imaging with calculated apparent diffusion coefficient in intracranial hemorrhagic lesions
U Dorenbeck1, J Schlaier, T Bretschneider
1Department of Diagnostic Radiology, University Hospital of Regensburg, Franz-Josef-Strauss-Allee 11, D-93042 Regensburg, Germany. ulrich.dorenbeck@uniklinik-saarland.de
Clinical Imaging
|March 9, 2005
Summary
Apparent diffusion coefficient (ADC) values in intracranial hemorrhagic lesions show inconsistent results. Echo-planar diffusion-weighted imaging (DWI) did not provide reliable ADC measurements for differentiating lesion stages.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Inconsistent apparent diffusion coefficient (ADC) values reported for intracranial hemorrhagic lesions using echo-planar imaging (EPI).
- Limited data exists on ADC values for bleedings within intracranial lesions.
Purpose of the Study:
- To investigate ADC values in various stages of intracranial hemorrhagic lesions.
- To evaluate the reliability of echo-planar diffusion-weighted imaging (DWI) for differentiating these lesions.
Main Methods:
- Studied 18 intracranial hemorrhagic lesions of different stages.
- Utilized echo-planar diffusion-weighted imaging (DWI) to measure ADC values.
- Compared ADC values with contralateral white matter.
Main Results:
- ADC values in hemorrhagic lesions ranged from 1.42 x 10(-3) to 0.22 x 10(-3) mm(2)/s.
- No significant difference found between lesion ADC values and contralateral white matter (P=.39).
- Differentiation of lesion stages based solely on ADC values was not possible.
Conclusions:
- Echo-planar DWI does not yield reliable ADC values for intracranial hemorrhagic lesions.
- Dependable differentiation between lesion stages using this technique is not feasible.