Noah Jaitner
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View article: Quantification of anisotropic biophysical properties of lower leg muscles at passive dorsiflexion and plantarflexion using magnetic resonance elastography and diffusion tensor imaging
Quantification of anisotropic biophysical properties of lower leg muscles at passive dorsiflexion and plantarflexion using magnetic resonance elastography and diffusion tensor imaging Open
Determining the biomechanical properties of skeletal muscle in-vivo is challenging due to structural anisotropy. In this study, we developed combined diffusion tensor imaging (DTI) and magnetic resonance elastography (MRE) to quantify dire…
View article: Liver Viscosity Decreases Before the Onset of Fibrosis in Metabolic Dysfunction-Associated Steatohepatitis (MASH)
Liver Viscosity Decreases Before the Onset of Fibrosis in Metabolic Dysfunction-Associated Steatohepatitis (MASH) Open
Background and Aim Metabolic dysfunction-associated steatohepatitis (MASH) is an increasingly prevalent condition worldwide, associated with biomechanical liver changes and detectable by magnetic resonance elastography (MRE). This study ex…
View article: In Vivo Wideband MR Elastography for Assessing Age-Related Viscoelastic Changes of the Human Brain
In Vivo Wideband MR Elastography for Assessing Age-Related Viscoelastic Changes of the Human Brain Open
Magnetic Resonance Elastography (MRE) noninvasively maps brain biomechanics and is highly sensitive to alterations associated with aging and neurodegenerative disease. Most implementations use a single frequency or a narrow frequency band,…
View article: MRpro - open PyTorch-based MR reconstruction and processing package
MRpro - open PyTorch-based MR reconstruction and processing package Open
We introduce MRpro, an open-source image reconstruction package built upon PyTorch and open data formats. The framework comprises three main areas. First, it provides unified data structures for the consistent manipulation of MR datasets a…
View article: Automated liver and spleen segmentation for MR elastography maps using U-Nets
Automated liver and spleen segmentation for MR elastography maps using U-Nets Open
To compare pretrained and trained U-Nets for liver and spleen segmentation in multifrequency magnetic resonance elastography (MRE) magnitude images for automated quantification of shear wave speed (SWS). Seventy-two healthy participants (3…
View article: Noninvasive assessment of portal pressure by combined measurement of volumetric strain and stiffness of in vivo human liver
Noninvasive assessment of portal pressure by combined measurement of volumetric strain and stiffness of in vivo human liver Open
Liver metabolism depends on the mechanical interplay between the solid tissue matrix and blood vessels, making shear modulus and pressure important variables of hepatic homeostasis. While shear modulus can be quantified by magnetic resonan…
View article: Rapid Stiffness Mapping in Soft Biologic Tissues With Micrometer Resolution Using Optical Multifrequency Time‐Harmonic Elastography
Rapid Stiffness Mapping in Soft Biologic Tissues With Micrometer Resolution Using Optical Multifrequency Time‐Harmonic Elastography Open
Rapid mapping of the mechanical properties of soft biological tissues from light microscopy to macroscopic imaging can transform fundamental biophysical research by providing clinical biomarkers to complement in vivo elastography. This wor…
View article: Time-harmonic optical flow with applications in elastography
Time-harmonic optical flow with applications in elastography Open
In this paper, we propose mathematical models for reconstructing the optical flow in time-harmonic elastography. In this image acquisition technique, the object undergoes a special time-harmonic oscillation with known frequency so that onl…
View article: Time-Harmonic Optical Flow with Applications in Elastography
Time-Harmonic Optical Flow with Applications in Elastography Open
In this paper, we propose mathematical models for reconstructing the optical flow in time-harmonic elastography. In this image acquisition technique, the object undergoes a special time-harmonic oscillation with known frequency so that onl…
View article: Optical time-harmonic elastography for multiscale stiffness mapping across the phylogenetic tree
Optical time-harmonic elastography for multiscale stiffness mapping across the phylogenetic tree Open
Rapid mapping of the mechanical properties of soft biological tissues from light microscopy to macroscopic imaging could transform fundamental biophysical research by providing clinical biomarkers to complement in vivo elastography. We her…