Compression sensitive elastography Ledia Lilaj, Thomas Fischer, Jing Guo, Jürgen Braun, Ingolf Sack, Sebastian Hirsch Background: Many diseases are associated with imbalanced fluid pressure regulation mechanisms. For example, normal pressure hydrocephalus or hepatic hypertension impose permanent or transient parenchymal pressure alterations, which are hard to detect by conventional imaging methods. MRE, sensitive to…
Rapid multi-frequency steady-state MR elastography for quantification of short-term alterations of viscoelasticity in biological soft tissue Felix Schrank, Carsten Warmuth, Lars-Arne Schaafs, Thomas Elgeti, Ingolf Sack While MR elastography (MRE) is an established imaging modality for mapping viscoelastic properties of the human liver and brain [1], there is a growing need to apply MRE…
Designing of a realistic tissue mimicking-elastography phantom Anna Morr, Heiko Tzschätzsch, Felix Schrank, Helge Herthum, Jürgen Braun, Ingolf Sack Viscoelastic properties of commercially available tissue-mimicking elastography phantoms are different from those of human soft tissue. Therefore, we aim to design an elastography phantom which viscoelastic properties over a wide frequency range are similar…
MRE in the mouse brain Anna Morr, Rafaela Vieira da Silva, Gergerly Bertalan, Barbara Steiner, Carmen Infante Duarte, Ingolf Sack Alterations and pathological changes in the brain can lead to changes of its viscoelastic properties, which are detectable by magnetic resonance elastography (MRE). In these projects, we study changes in viscoelasticity due to…
Time-harmonic ultrasound elastography of the brain Bernhard Kreft, Heiko Tzschätzsch, Judith Bergs, Jürgen Braun, Ingolf Sack Cerebral stiffness (CS) is related to many structural and physiological changes in the brain. Magnetic resonance elastography (MRE) is feasible to measure CS with high spatial resolution. However, MRE suffers from poor temporal resolution. Time-harmonic ultrasound elastography…
Ultrasound time-harmonic elastography for the assessment of glomerulonephritis Markus Großmann, Ingolf Sack, Stephan Rodrigo Marticorena Garcia The kidney function is of vital importance for the human metabolism, blood circulation and endocrine system. Glomerulonephritides comprises a group of immunologic renal diseases that can result in structural damage and functional failure due to inflammatory processes…
MRE in inflammatory neurological diseases Helge Herthum, Ingolf Sack High-Resolution magnetic resonance elastography (MRE) allows the investigation of spatially localized inflammatory processes in various organs and as well in the brain [1] [2]. This project aims at understanding the underlying mechanical-structural changes accompanying progressive inflammatory disease like multiple sclerosis. Viscoelastic properties of brain…
Longitudinal in vivo MRE study on mouse model of hepatocellular carcinoma (HCC) Karolina Garczynska, Jing Guo Tumor progression, reorganization and migration of cancer cells cause changes in the extracellular matrix (ECM) and stromal cells, the so called tumor surrounding environment (TSE). In the first part of the project, we plan to study longitudinally…
High-resolution multifrequency MRE at high field strengths Gergely Bertalan, Jürgen Braun, Ingolf Sack Rheological constants measured on different length scales provide insight into the biomechanical properties of the tissue. However, it is largely unknown to which extend biomechanical properties are scale-invariant and if tissue mechanical parameters can be compared when acquired at different…
