rCBV values varied among tumor grades, with higher mean values in higher grade tumors ( P <. RESULTS: Histologic grades were grade II, astrocytoma (n = 3) grade III, anaplastic astrocytoma (n = 10) and grade IV, glioblastoma multiforme (n = 14). Maps of relative cerebral blood volume (rCBV) and relative recirculation (rR) were calculated, and values from enhancing tumor tissue were compared with tumor grade. Residual relaxivity effects were minimized by injection of contrast agent before dynamic imaging. METHODS: Contrast-enhanced dynamic susceptibility MR imaging was performed in 27 patients with glioma. This study was performed to examine the hypothesis that these abnormalities provide information concerning the microcirculation related to tumor grade in patients with cerebral glioma. BACKGROUND AND PURPOSE: Abnormalities in the recirculation phase of the passage of a contrast agent bolus have been identified in tumors and have been suggested to represent vascular tortuosity and hypoperfusion in areas of angiogenic neovascularization.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |