A5055284896- Cardiac Imaging and Diagnostics
- Remote Sensing and LiDAR Applications
- Advanced X-ray and CT Imaging
- 3D Surveying and Cultural Heritage
- Advanced MRI Techniques and Applications
- Radiation Dose and Imaging
- Remote Sensing in Agriculture
- Cryospheric studies and observations
- Medical Imaging Techniques and Applications
- Climate change and permafrost
- Cerebrovascular and Carotid Artery Diseases
- Coronary Interventions and Diagnostics
- Species Distribution and Climate Change
- Forest ecology and management
- Forest Ecology and Biodiversity Studies
- Landslides and related hazards
- Cardiac Valve Diseases and Treatments
- Digital Radiography and Breast Imaging
- Acute Ischemic Stroke Management
- Intracranial Aneurysms: Treatment and Complications
- Advanced X-ray Imaging Techniques
- MRI in cancer diagnosis
- Aeolian processes and effects
- Image Processing and 3D Reconstruction
- Vascular Procedures and Complications
Technical University of Munich
2024
Colorado State University
2024
Remote Sensing Solutions (Germany)
2024
Heidelberg University
2016-2023
Heidelberg University
2020
Geomer (Germany)
2016
Friedrich-Alexander-Universität Erlangen-Nürnberg
2005-2014
Universitätsklinikum Erlangen
2005-2014
Justus-Liebig-Universität Gießen
2012
Siemens Healthcare (Germany)
2009
Background— We analyzed the accuracy of multi-detector row spiral computed tomography (MDCT) using a 16-slice CT scanner with improved spatial and temporal resolution, as well routine premedication β-blockers for detection coronary stenoses. Methods Results— Seventy-seven patients suspected disease were studied by MDCT (12×0.75-mm cross-sections, 420 ms rotation, 100 mL contrast agent IV at 5 mL/s). Patients heart rate above 60/min received 50 mg atenolol before scan. In axial images...
Background— We investigated the ability of multidetector spiral computed tomography (MDCT) to detect atherosclerotic plaque in nonstenotic coronary arteries. Methods and Results— In 22 patients without significant stenoses, contrast-enhanced MDCT (0.75-mm collimation, 420-ms rotation) intravascular ultrasound (IVUS) one artery were performed. A total 83 segments imaged by IVUS (left main, 19; left anterior descending, 51; circumflex, 4; right coronary, 9). data sets evaluated for presence...
AimsWe evaluated the feasibility and image quality of a new scan mode for coronary computed tomography angiography (CTA) with an effective dose less than 1 mSv.
Multidetector computed tomographic angiography (MDCT) has been shown to allow detection of coronary artery bypass graft (CABG) occlusions and stenoses. However, the assessment native arteries in addition CABG thus far not sufficiently validated.Fifty patients with a total 138 (34 mammary grafts, 3 radial 101 venous grafts) were investigated by MDCT (0.6-mm collimation, 32 detector rows, 2 focal points, 330-ms rotation) 9 252 months (mean, 106 months) after surgery. all diameter > 1.5 mm...
Aims We investigated the feasibility of assessing coronary artery stent restenosis using a new generation 64-slice multi-detector computed tomography-scanner (MDCT) in comparison to conventional quantitative angiography. Methods and results MDCT was performed 64 consecutive patients (mean age 58±10 years) with previously implanted stents (102 stented lesions: mean diameter 3.17±0.38 mm). Each classified as 'evaluable' or 'unevaluable', evaluable stents, presence in-stent (diameter reduction...
Abstract. Most of the world's permafrost is located in Arctic, where its frozen organic carbon content makes it a potentially important influence on global climate system. The Arctic appears to be changing more rapidly than lower latitudes, but observational data density region low. Permafrost thaw and release into atmosphere, as well snow cover changes, are positive feedback mechanisms that have potential for warming. It therefore particularly understand links between energy balance, which...
Topographic laser scanning is a remote sensing method to create detailed 3D point cloud representations of the Earth's surface. Since data acquisition expensive, simulations can complement real given certain premises are met: (i) models scene and scanner available (ii) modelling beam-scene interaction simplified computationally feasible while physically realistic level. A number simulators for different purposes exist, which we enrich by presenting HELIOS++. HELIOS++ an open-source...
The analysis of topographic time series is often based on bitemporal change detection and quantification. For 3D point clouds, acquired using laser scanning or photogrammetry, random systematic noise has to be separated from the signal surface by determining minimum detectable change. To analyse geomorphic in cloud data, multiscale model-to-model comparison (M3C2) approach commonly applied, which provides a statistical significance test. This test assumes planar surfaces uniform registration...
Achenbach S, Giesler T, Ropers D, et al. Comparison of image quality in contrast-enhanced coronary-artery visualization by electron beam tomography and retrospectively electrocardiogram-gated multislice spiral computed tomography. Invest Radiol 2003;38:119–128. Rationale Objectives. To compare the (EBT) CT (MSCT) for coronary artery visualization. Materials Methods. Two groups 30 patients without stenoses were studied MSCT (4 × 1 mm collimation) or EBT (3 slice thickness). Contrast-to-noise...