Georg Rose
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View article: Evaluation of algorithmic requirements for clinical application of material decomposition using a multi-layer flat panel detector
Evaluation of algorithmic requirements for clinical application of material decomposition using a multi-layer flat panel detector Open
In a contact scan, scattered radiation leads to negative bone contrast estimates in the bone images and remaining bone contrast in the soft tissue images. Therefore, accurate scatter estimation and correction algorithms are essential when …
View article: Modulating CT Attenuation of Polyvinyl Alcohol Cryogels for Individualized Training Phantoms in Interventional Radiology: A Proof-of-Concept Study
Modulating CT Attenuation of Polyvinyl Alcohol Cryogels for Individualized Training Phantoms in Interventional Radiology: A Proof-of-Concept Study Open
Anthropomorphic CT phantoms are essential training tools for interventional radiology. Given the high technical demands and stringent safety requirements in this field, realistic CT phantoms are vital simulation tools that support effectiv…
View article: Microwave-Assisted Optimization of Polyvinyl Alcohol Cryogel (PVA-C) Manufacturing for MRI Phantom Production
Microwave-Assisted Optimization of Polyvinyl Alcohol Cryogel (PVA-C) Manufacturing for MRI Phantom Production Open
Objectives: Anthropomorphic phantoms offer a promising solution to minimize animal testing, enable medical training, and support the efficient development of medical devices. The adjustable mechanical, biochemical, and imaging properties o…
View article: Model‐based perfusion reconstruction with time separation technique in cone‐beam CT dynamic liver perfusion imaging
Model‐based perfusion reconstruction with time separation technique in cone‐beam CT dynamic liver perfusion imaging Open
Background The success of embolization, a minimally invasive treatment of liver cancer, could be evaluated in the operational room with cone‐beam CT by acquiring a dynamic perfusion scan to inspect the contrast agent flow. Purpose The reco…
View article: CT‐augmented digital tomosynthesis image reconstruction in image‐guided bronchoscopy interventions
CT‐augmented digital tomosynthesis image reconstruction in image‐guided bronchoscopy interventions Open
Background Transbronchial needle biopsy is crucial for diagnosing lung cancer, yet its efficacy depends on accurately localizing the target lesion and biopsy needle. Digital tomosynthesis (DTS) is considered a promising imaging modality fo…
View article: Model-Based Perfusion Reconstruction with Time Separation Technique in Cone-Beam CT Dynamic Liver Perfusion Imaging
Model-Based Perfusion Reconstruction with Time Separation Technique in Cone-Beam CT Dynamic Liver Perfusion Imaging Open
The success of embolisation, a minimally invasive treatment of liver cancer, could be evaluated in the operational room with cone-beam CT by acquiring a dynamic perfusion scan. The reconstruction algorithm must address the issues of low te…
View article: Vacuum-based and body-mounted robotic-patient interface with an integrated metasurface for MRI-guided interventions
Vacuum-based and body-mounted robotic-patient interface with an integrated metasurface for MRI-guided interventions Open
The increased clinical relevance of image-guided procedures, particularly of interventional magnetic resonance imaging (iMRI), highlights the need for advanced devices and robotics to optimize those procedures. To enable a realistic integr…
View article: Generating Contrast-Enhanced Liver MRI Images from Native Sequences
Generating Contrast-Enhanced Liver MRI Images from Native Sequences Open
Generating synthetic contrast-enhanced liver MRI scans from native MRI images can serve to mitigate the issue of sparse contrast-enhanced image datasets while concurrently circumventing the time-consuming and costly process of administerin…
View article: Effect of Spectral Filtering and Segmental X-ray Tube Current Switch-Off on Interventionalist’s Scatter Exposure during CT Fluoroscopy
Effect of Spectral Filtering and Segmental X-ray Tube Current Switch-Off on Interventionalist’s Scatter Exposure during CT Fluoroscopy Open
Dose optimization in computed tomography (CT) is crucial, especially in CT fluoroscopy (fluoro-CT) used for real-time navigation, affecting both patient and operator safety. This study evaluated the impact of spectral X-ray filtering using…
View article: Joint $\text{B}_{0}$ and Image Reconstruction in Low-Field MRI by Physics-Informed Deep-Learning
Joint $\text{B}_{0}$ and Image Reconstruction in Low-Field MRI by Physics-Informed Deep-Learning Open
low-field MRI is becoming increasingly more popular as it enables access to MR in challenging situations such as intensive care units or resource poor areas. Our method allows for fast and accurate image reconstruction in such low-field im…
View article: Deformable 3D/3D CT-to-digital-tomosynthesis image registration in image-guided bronchoscopy interventions
Deformable 3D/3D CT-to-digital-tomosynthesis image registration in image-guided bronchoscopy interventions Open
Traditional navigational bronchoscopy procedures rely on preprocedural computed tomography (CT) and intraoperative chest radiography and cone-beam CT (CBCT) to biopsy peripheral lung lesions. This navigational approach is challenging due t…
View article: Exploration of Interpretability Techniques for Deep COVID-19 Classification Using Chest X-ray Images
Exploration of Interpretability Techniques for Deep COVID-19 Classification Using Chest X-ray Images Open
The outbreak of COVID-19 has shocked the entire world with its fairly rapid spread, and has challenged different sectors. One of the most effective ways to limit its spread is the early and accurate diagnosing of infected patients. Medical…
View article: DDoS-UNet: Incorporating temporal information using Dynamic Dual-channel UNet for enhancing super-resolution of dynamic MRI
DDoS-UNet: Incorporating temporal information using Dynamic Dual-channel UNet for enhancing super-resolution of dynamic MRI Open
Magnetic resonance imaging (MRI) provides high spatial resolution and excellent soft-tissue contrast without using harmful ionising radiation. Dynamic MRI is an essential tool for interventions to visualise movements or changes of the targ…
View article: DDoS-UNet: Incorporating Temporal Information Using Dynamic Dual-Channel UNet for Enhancing Super-Resolution of Dynamic MRI
DDoS-UNet: Incorporating Temporal Information Using Dynamic Dual-Channel UNet for Enhancing Super-Resolution of Dynamic MRI Open
Magnetic resonance imaging (MRI) provides high spatial resolution and excellent soft-tissue contrast without using harmful ionising radiation. Dynamic MRI is an essential tool for interventions to visualise movements or changes of the targ…
View article: Determining of Ablation Zone in Ex Vivo Bovine Liver Using Time-Shift Measurements
Determining of Ablation Zone in Ex Vivo Bovine Liver Using Time-Shift Measurements Open
This study presents a measurement principle for determining the size of the ablation zone in MWA, which could ultimately form an alternative to more expensive monitoring approaches like CT. The measurement method is based on a microwave tr…
View article: Towards a biomechanical breast model to simulate and investigate breast compression and its effects in mammography and tomosynthesis
Towards a biomechanical breast model to simulate and investigate breast compression and its effects in mammography and tomosynthesis Open
Objective . In mammography, breast compression forms an essential part of the examination and is achieved by lowering a compression paddle on the breast. Compression force is mainly used as parameter to estimate the degree of compression. …
View article: Liver Segmentation in Time-resolved C-arm CT Volumes Reconstructed from Dynamic Perfusion Scans using Time Separation Technique
Liver Segmentation in Time-resolved C-arm CT Volumes Reconstructed from Dynamic Perfusion Scans using Time Separation Technique Open
Perfusion imaging is a valuable tool for diagnosing and treatment planning for liver tumours. The time separation technique (TST) has been successfully used for modelling C-arm cone-beam computed tomography (CBCT) perfusion data. The recon…
View article: Shear wave generation from non-spherical bubble collapse in a tissue phantom
Shear wave generation from non-spherical bubble collapse in a tissue phantom Open
Non-spherical collapse of cavitation bubbles generates shear waves in soft matter whose energy and propagation direction are related to the distance from a solid boundary.
View article: Iterative intraoperative digital tomosynthesis image reconstruction using a prior as initial image
Iterative intraoperative digital tomosynthesis image reconstruction using a prior as initial image Open
The efficacy of interventional treatments highly relies on an accurate identification of the target lesions and the interventional tools in the guidance images. Whereas X-ray radiography poses low doses to the patient, its weakness is in t…
View article: Time separation technique using prior knowledge for dynamic liver perfusion imaging
Time separation technique using prior knowledge for dynamic liver perfusion imaging Open
The perfusion imaging using C-arm CT could be used intraoperatively for liver cancer treatment planning and evaluation. To deal with undersampled data due to slow C-arm CT rotation and pause between the rotations, we applied model-based re…
View article: Fourier‐based decomposition for simultaneous 2‐voxel <scp>MRS</scp> acquisition with <scp>2SPECIAL</scp>
Fourier‐based decomposition for simultaneous 2‐voxel <span>MRS</span> acquisition with <span>2SPECIAL</span> Open
Purpose To simultaneously acquire spectroscopic signals from two MRS voxels using a multi‐banded 2 spin‐echo, full‐intensity acquired localized (2SPECIAL) sequence, and to decompose the signal to their respective regions by a novel voxel‐G…
View article: Liver Segmentation using Turbolift Learning for CT and Cone-beam C-arm Perfusion Imaging
Liver Segmentation using Turbolift Learning for CT and Cone-beam C-arm Perfusion Imaging Open
Model-based reconstruction employing the time separation technique (TST) was found to improve dynamic perfusion imaging of the liver using C-arm cone-beam computed tomography (CBCT). To apply TST using prior knowledge extracted from CT per…
View article: Primal-Dual UNet for Sparse View Cone Beam Computed Tomography Volume Reconstruction
Primal-Dual UNet for Sparse View Cone Beam Computed Tomography Volume Reconstruction Open
In this paper, the Primal-Dual UNet for sparse view CT reconstruction is modified to be applicable to cone beam projections and perform reconstructions of entire volumes instead of slices. Experiments show that the PSNR of the proposed met…
View article: Dual Branch Prior-SegNet: CNN for Interventional CBCT using Planning Scan and Auxiliary Segmentation Loss
Dual Branch Prior-SegNet: CNN for Interventional CBCT using Planning Scan and Auxiliary Segmentation Loss Open
This paper proposes an extension to the Dual Branch Prior-Net for sparse view interventional CBCT reconstruction incorporating a high quality planning scan. An additional head learns to segment interventional instruments and thus guides th…
View article: A novel use of time separation technique to improve flat detector CT perfusion imaging in stroke patients
A novel use of time separation technique to improve flat detector CT perfusion imaging in stroke patients Open
Background CT perfusion imaging (CTP) is used in the diagnostic workup of acute ischemic stroke (AIS). CTP may be performed within the angio suite using flat detector CT (FDCT) to help reduce patient management time. Purpose In order to si…