ISSN:
1432-1084
Keywords:
MR
;
Perfusion study
;
Brain
;
Necrosis
;
Edema
;
Neoplasms
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The aim of this study was to characterize intracranial tumors based on MR measurements of regional cerebral blood volume. In 8 patients without intracranial pathology and 42 patients with intracranial tumors a T2*-weighted image series was acquired during bolus injection of gadolinium-DTPA, and regional cerebral blood volume maps were calculated. The regional cerebral blood volume index (rCBVi) of vital tumor was expressed in percent of the value measured in contralateral gray matter. In extra-axial tumors (meningiomas) rCBVi was higher (124 ± 110%), and in low-grade intra axial tumors rCBVi was lower (79 ± 65%), than in contralateral cortex. In malignant intra-axial tumors the distribution of rCBV was heterogenous: high in vital tumor (glioblastomas: rCBVi = 165 ± 85%; metastases: rCBVi = 106 ± 79%), but low in necrosis (rCBVi = 33% of contralateral white matter) and edema (rCBVi = 53% of contralateral white matter). rCBVi was highest in arteriovenous malformations (1053 ± 584% of contralateral gray matter). We conclude that the regional cerebral blood volume distribution is useful to characterize intracranial tumors, although the large biological variability of individual tumor entities indicates limitations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00208347
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