MRI-Tracked Tumor Vascular Changes in the Hours after Single-Fraction Irradiation

作者: Stephen L. Brown , Tavarekere N. Nagaraja , Madhava P. Aryal , Swayamprava Panda , Glauber Cabral

DOI: 10.1667/RR13458.1

关键词: Brain tumorNuclear medicineIrradiationDose–response relationshipMagnetic resonance imagingGliomaMedicineHuman brainCerebral blood flowBlood flow

摘要: The purpose of this study was to characterize changes in tumor vascular parameters hours after a single radiation exposure an orthotopic brain model. U-251 human tumors were established intracerebrally rat brains, and blood flow, forward volume transfer constant (Ktrans) interstitial fraction (ve) measured using magnetic resonance imaging (MRI). Tumors stereotactic treatment 20 Gy. Vascular assessed one additional time between 2 24 h irradiation. After the second MRI session, tissue histology examined for gross apoptosis. In separate studies, cerebral flow nonimplanted controls before Gy irradiation, implanted rats at 6 Significant observed tumor-bearing brains Two irradiat...

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