Articles by Katharina Schregel in JoVE
Optimized Management of Endovascular Treatment for Acute Ischemic Stroke Katharina Schregel1,2, Daniel Behme1, Ioannis Tsogkas1, Michael Knauth1, Ilko Maier3, André Karch4, Rafael Mikolajczyk4,5, Mathias Bähr3, Jörn Schäper6, José Hinz6, Jan Liman3, Marios-Nikos Psychogios1 1Institute of Neuroradiology, University Medical Center Goettingen, 2 The outcome of patients with acute ischemic stroke depends on swift restoration of cerebral blood flow. This protocol aims at optimizing the management of such patients by minimizing peri-procedural timings and rendering the time from hospital admission to reperfusion as short as possible.
Other articles by Katharina Schregel on PubMed
Early Computed Tomography-based Scores to Predict Decompressive Hemicraniectomy After Endovascular Therapy in Acute Ischemic Stroke PloS One. | Pubmed ID: 28282456 Identification of patients requiring decompressive hemicraniectomy (DH) after endovascular therapy (EVT) is crucial as clinical signs are not reliable and early DH has been shown to improve clinical outcome. The aim of our study was to identify imaging-based scores to predict the risk for space occupying ischemic stroke and DH.
Characterization of Glioblastoma in an Orthotopic Mouse Model with Magnetic Resonance Elastography NMR in Biomedicine. | Pubmed ID: 29193449 Glioblastoma (GBM) is the most common primary brain tumor. It is highly malignant and has a correspondingly poor prognosis. Diagnosis and monitoring are mainly accomplished with MRI, but remain challenging in some cases. Therefore, complementary methods for tumor detection and characterization would be beneficial. Using magnetic resonance elastography (MRE), we performed a longitudinal study of the biomechanical properties of intracranially implanted GBM in mice and compared the results to histopathology. The biomechanical parameters of viscoelastic modulus, shear wave speed and phase angle were significantly lower in tumors compared with healthy brain tissue and decreased over time with tumor progression. Moreover, some MRE parameters revealed sub-regions at later tumor stages, which were not easily detectable on anatomical MRI images. Comparison with histopathology showed that softer tumor regions contained necrosis and patches of viable tumor cells. In contrast, areas of densely packed tumor cells and blood vessels identified with histology coincided with higher values of viscoelastic modulus and shear wave speed. Interestingly, the phase angle was independent from these anatomical variations. In summary, MRE depicted longitudinal and morphological changes in GBM and may prove valuable for tumor characterization in patients.