A5035859084- Advanced X-ray and CT Imaging
- Radiation Dose and Imaging
- Radiomics and Machine Learning in Medical Imaging
- MRI in cancer diagnosis
- Colorectal Cancer Screening and Detection
- Medical Imaging Techniques and Applications
- Traumatic Brain Injury and Neurovascular Disturbances
- Cardiac Imaging and Diagnostics
- Nutrition and Health in Aging
- Cardiac, Anesthesia and Surgical Outcomes
- Thyroid Cancer Diagnosis and Treatment
- Dental Radiography and Imaging
- Hip and Femur Fractures
- Head and Neck Surgical Oncology
- Kidney Stones and Urolithiasis Treatments
- Advanced Data Compression Techniques
- Radiology practices and education
- Orthopaedic implants and arthroplasty
- Lung Cancer Diagnosis and Treatment
- Cancer Immunotherapy and Biomarkers
- Gastric Cancer Management and Outcomes
- Medical Imaging and Pathology Studies
- Ovarian cancer diagnosis and treatment
- Sinusitis and nasal conditions
- Electrical and Bioimpedance Tomography
Medical University of Vienna
2014-2024
Donauspital
2022-2024
Wiener Krankenanstaltenverbund
2023-2024
Orthopaedic Hospital Speising
2023
Medical University of Graz
2022
Vienna General Hospital
2002-2020
University of Vienna
1996-2020
Klinik und Poliklinik für Nuklearmedizin
2017-2020
Universität für Weiterbildung Krems
2020
Addenbrooke's Hospital
2008
PURPOSE: To use perspective volume rendering (PVR) of computed tomographic (CT) and magnetic resonance (MR) imaging data sets to simulate endoscopic views human organ systems. MATERIALS AND METHODS: Perspective helical CT MR images were reconstructed from the data, tissues classified by assigning color opacity based on their attenuation or signal intensity. "Flight paths" constructed through anatomic regions defining key along a spline path. Twelve movies thoracic aorta (n=3),...
Human patient simulators and airway training manikins are widely used to train management skills medical professionals. Furthermore, these employed as standardized "patients" evaluate devices. However, little is known about how realistic airway-training really are. This trial aimed the upper anatomy of four high-fidelity two trainers in comparison with actual patients by means radiographic measurements. The volume pharyngeal airspace was primary outcome parameter.Computed tomography scans 20...
DNA methylation profiles have emerged as potential predictors of therapeutic response in various solid tumors. This study aimed to analyze the patients with stage IV metastatic melanoma undergoing first-line immune checkpoint inhibitor treatment and evaluate their correlation a radiological according immune-related Response Evaluation Criteria Solid Tumors (iRECIST). A total 81 tissue samples from 71 (27 female, 44 male) were included this study. We utilized Illumina Methylation EPIC...
To compare the value of functional future liver remnant (functFLR) to established clinical and imaging variables in prediction post-hepatectomy failure (PHLF) after major resection.This retrospective, cross-sectional study included 62 patients, who underwent gadoxetic acid enhanced MRI MDCT within 10 weeks prior resection ≥ 4 segments. Future (FLR) was measured using semi-automatic software. Relative enhancement for each FLR segment calculated as ratio signal intensity parenchyma before 20...
PURPOSE: To evaluate the diagnostic potential of spiral computed tomography (CT) performed after administration cholangiographic contrast material (spiral CT cholangiography) in patients with suspected obstructive biliary disease. MATERIALS AND METHODS: After infusion meglumine iodoxamate, 29 underwent upper abdominal subsequent three-dimensional rendering tract. In 27 patients, presence, site, and extent obstruction were compared that at endoscopic retrograde cholangiography (ERC). RESULTS:...
<b>BACKGROUND AND PURPOSE:</b> The characterization of cold nodules the thyroid gland is mandatory because approximately 20% these are malignant origin. purpose this study was to evaluate distinction by using quantitative diffusion-weighted MR imaging (DWI). <b>MATERIALS METHODS:</b> In 25 patients with on scintigraphy and suggestive findings at fine-needle aspiration, carcinoma suggested. patients, normal parenchyma contralateral lobe were prospectively investigated DWI (echo-planar...
The aim of this study was to assess the objective and subjective image characteristics monoenergetic images (MEI[+]), using a noise-optimized algorithm at different kiloelectron volts (keV) compared polyenergetic (PEI), in patients with pancreatic ductal adenocarcinoma (PDAC). This retrospective, institutional review board-approved included 45 (18 male, 27 female; mean age 66 years; range, 42–96 years) PDAC who had undergone dual-energy CT (DECT) abdomen for staging. One standard (PEI) five...
Abstract Objectives To conduct an intrapatient comparison of ultra-low-dose computed tomography (ULDCT) and standard-of-care-dose CT (SDCT) the chest in terms diagnostic accuracy ULDCT intrareader agreement patients with post-COVID conditions. Methods We prospectively included 153 consecutive post-COVID-19 All participants received SDCT additional scan chest. SDCTs were performed standard imaging parameters ULDCTs at a fixed tube voltage 100 kVp (with tin filtration), 50 ref. mAs (dose...
Purpose To retrospectively assess the rate of detection skull fractures at cranial computed tomography (CT) achieved with use curved maximum intensity projections (MIPs) compared that by reading transverse sections only. Materials and Methods The institutional review board approved this research waived informed consent. A thin (3-mm) MIP cap a thick (50-mm) base were obtained from CT data in 200 consecutive patients head trauma. Four radiologists (two residents without experience two...
We evaluated a dual energy, split bolus computerized tomography protocol that provides virtual noncontrast, parenchymal and urographic phases in single scan. assessed the sensitivity of noncontrast phase using this to detect urinary stones compared gold standard true phase.We prospectively enrolled study 81 patients who underwent unenhanced energy at 120 kV/200 mA as well contrast enhanced on Somatom® Definition Flash-CT (tube A 80 kV/233 tube B SN 140 kV/180 with 1/0.8 mm slice thickness)....
Our goal was to use three-dimensional information obtained from helical computed tomographic (CT) data explore and evaluate the nasal cavity, nasopharynx, paranasal sinuses by simulated virtual endoscopy (VE). This done utilizing a new image reconstruction method known as perspective volume rendering (PVR). Thin-section CT of performed on conventional scanner. The were transferred workstation create views similar those seen with endoscopy. Additional not normally accessible generated. Key...
To assess retrospectively the effect of Joint Photographic Experts Group 2000 (JPEG2000) compression ratio on quality thin-section computed tomographic (CT) images.In this institutional review board-approved investigation (protocol 238/2004), CT images were subjected to irreversible JPEG2000 by using five ratios (3:1, 5:1, 7:1, 9:1, and 11:1). Three radiologists independently evaluated 60 images, various diseases, that obtained with single-detector (weighted dose index, 14.4 mGy)...
The purpose of this study was to use second-generation dual-source CT assess the influence size, degree stenosis, luminal contrast attenuation, and plaque geometry on stenosis quantification in a coronary artery phantom.Six vessel phantoms with three outer diameters (2, 3, 4 mm), each containing radiolucent plaques (72.2 HU) that simulated eccentric concentric 43.8%, 75%, 93.8% stenoses were made 3D printer system. These filled an iodine-saline solution mixture at attenuations 150, 200, 250,...
To evaluate the influence of different scan parameters for single-energy CT and dual-energy CT, as well impact material used in a TKA prosthesis on image quality extent metal artifacts. Eight pairs prostheses from vendors were examined phantom set-up. Each pair consisted conventional CoCr corresponding anti-allergic (full titanium, ceramic, or ceramic-coated) same vendor. Nine (seven two CT) protocols with characteristics to determine most suitable protocol imaging. Quantitative analysis...