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- Title
MRI perfusion measurements calculated using advanced deconvolution techniques predict survival in recurrent glioblastoma treated with bevacizumab.
- Authors
Harris, Robert; Cloughesy, Timothy; Hardy, Anthony; Liau, Linda; Pope, Whitney; Nghiemphu, Phioanh; Lai, Albert; Ellingson, Benjamin
- Abstract
Bevacizumab is a therapeutic drug used in treatment of recurrent glioblastoma to inhibit angiogenesis. Treatment response is often monitored through the use of perfusion MRI measures of cerebral blood volume, flow, and other pharmacokinetic parameters; however, most methods for deriving these perfusion parameters can produce errors depending on bolus kinetics. Recently, a number of new methods have been developed to overcome these challenges. In the current study we examine cerebral blood volume and blood flow characteristics in 45 recurrent glioblastoma patients before and after treatment with bevacizumab. Perfusion MRI data was processed using a standard single value decomposition (SVD) technique, two block-circulant SVD techniques, and a Bayesian estimation technique. A proportional hazards model showed that patients with a large decrease in relative blood volume (RBV) after treatment had extended overall survival ( P = 0.0048). Patients with large pre-treatment relative blood flow (RBF) showed extended progression-free survival ( P = 0.0216) and overall survival ( P = 0.0112), and patients with a large decrease in RBF following treatment showed extended overall survival ( P = 0.0049). These results provide evidence that blood volume and blood flow measurements can be used as biomarkers in patients treated with bevacizumab.
- Subjects
MAGNETIC resonance imaging of cancer; DECONVOLUTION (Mathematics); GLIOBLASTOMA multiforme treatment; BEVACIZUMAB; GLIOBLASTOMA multiforme; CEREBRAL circulation; BLOOD volume; PATIENTS
- Publication
Journal of Neuro-Oncology, 2015, Vol 122, Issue 3, p497
- ISSN
0167-594X
- Publication type
Article
- DOI
10.1007/s11060-015-1755-8