MR diffusion imaging of human intracranial tumours.

Bidragets oversatte titel: MR diffusion imaging of human intracranial tumours.

K Krabbe, P Gideon, P Wagn, Ulla Hansen, C Thomsen, F Madsen

304 Citationer (Scopus)

Abstract

We used MRI for in vivo measurement of brain water self-diffusion in patients with intracranial tumours. The study included 28 patients (12 with high-grade and 3 with low-grade gliomas, 7 with metastases, 5 with meningiomas and 1 with a cerebral abscess). Apparent diffusion coefficients (ADC) were calculated in a single axial slice through the tumours, the sequence was sensitive to diffusion along the cephalocaudal axis. Our main finding was that ADC in contrast-enhancing areas within cerebral metastases was statistically significantly higher than ADC in contrast-enhancing areas in high-grade gliomas (P < or = 0.05). Furthermore, the ADC in oedema surrounding metastases were statistically significantly higher the ADC in oedema around high-grade gliomas (P < or = 0.02). The ADC in patients with meningiomas did not differ significantly from those seen with high-grade gliomas or cerebral metastases. The highest ADC were found within cystic or necrotic tumour areas. In one patient with a cerebral abscess, suspected of having a high-grade glioma, the ADC was similar to that in high-grade gliomas. The finding of higher ADC in cerebral metastases than in high-grade gliomas may be helpful in trying to distinguish between these tumours preoperatively; it suggests increased free extracellular and/or intracellular water fraction in cerebral metastases. The method seems to hold potential for further noninvasive characterisation of intracranial tumours.
Bidragets oversatte titelMR diffusion imaging of human intracranial tumours.
OriginalsprogEngelsk
TidsskriftNeuroradiology
Vol/bind39
Udgave nummer7
Sider (fra-til)483-489
Antal sider7
ISSN0028-3940
StatusUdgivet - 1997

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