David Molina

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Objectives. Colleges and universities routinely use evaluation scores to assess the quality of an instructor’s teaching for purposes of promotion and tenure and for merit-raise allocations. This article attempts to identify the determinants of these scores, and to suggest ways that departments’ numerical rankings of instructors might be adjusted. Method.(More)
PURPOSE Tumor heterogeneity in medical imaging is a current research trend due to its potential relationship with tumor malignancy. The aim of this study is to analyze the effect of dynamic range and matrix size changes on the results of different heterogeneity measures. MATERIALS AND METHODS Four patients harboring three glioblastomas and one metastasis(More)
A method of data reduction for the statistical examination of mean arterial pressure in essential hypertensive subjects to determine salt sensitivity was examined. A computerized method was used to estimate the best-fitting cosine curve for data collected every 30 minutes for 24 hours. The effect of sodium loading on the cosinor parameters (mesor,(More)
OBJECTIVE The main objective of this retrospective work was the study of three-dimensional (3D) heterogeneity measures of post-contrast pre-operative MR images acquired with T1 weighted sequences of patients with glioblastoma (GBM) as predictors of clinical outcome. METHODS 79 patients from 3 hospitals were included in the study. 16 3D textural(More)
The potential of a tumour’s volumetric measures obtained from pretreatment MRI sequences of glioblastoma (GBM) patients as predictors of clinical outcome has been controversial. Mathematical models of GBM growth have suggested a relation between a tumour’s geometry and its aggressiveness. A multicenter retrospective clinical study was designed to study(More)
BACKGROUND Antiangiogenic therapies for glioblastoma (GBM) such as bevacizumab (BVZ), have been unable to extend survival in large patient cohorts. However, a subset of patients having angiogenesis-dependent tumors might benefit from these therapies. Currently, there are no biomarkers allowing to discriminate responders from non-responders before the start(More)
The aim of the study was to investigate the influence of dual time point 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) positron emission tomography/x-ray computed tomography (PET/CT) on the standard uptake value (SUV) and volume-based metabolic variables of breast lesions and their relation with biological characteristics and molecular phenotypes.(More)