Search Results - "Ringl, Helmut"

Protocol analysis of dual-energy CT for optimization of kidney stone detection in virtual non-contrast reconstructions by Lazar, Matthias, Ringl, Helmut, Baltzer, Pascal, Toth, Daniel, Seitz, Christian, Krauss, Bernhard, Unger, Ewald, Polanec, Stephan, Tamandl, Dietmar, Herold, Christian J., Toepker, Michael

“…Objectives Previous studies have shown that split-bolus protocols in virtual non-contrast (VNC) reconstructions of dual-energy computed tomography (DE-CT)…”
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Virtual non-contrast in second-generation, dual-energy computed tomography: Reliability of attenuation values by Toepker, Michael, Moritz, Thomas, Krauss, Bernhard, Weber, Michael, Euller, Gordon, Mang, Thomas, Wolf, Florian, Herold, Christian J, Ringl, Helmut

“…Abstract Purpose To evaluate the reliability of attenuation values in virtual non-contrast images (VNC) reconstructed from contrast-enhanced, dual-energy scans…”
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Brain malformations in diprosopia observed in clinical cases, museum specimens and artistic representations by Rehder, Helga, Kircher, Susanne G, Schoner, Katharina, Smogavec, Mateja, Behunova, Jana, Ihm, Ulrike, Plassmann, Margit, Hofer, Manuel, Ringl, Helmut, Laccone, Franco

“…Diprosopus is a rare malformation of still unclear aetiology. It describes a laterally double faced monocephalic and single-trunk individual and has to be…”
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Substantial radiation dose reduction with consistent image quality using a novel low-dose stone composition protocol by Apfaltrer, Georg, Dutschke, Anja, Baltzer, Pascal A. T., Schestak, Christian, Özsoy, Mehmet, Seitz, Christian, Veser, Julian, Petter, Elisabeth, Helbich, Thomas H., Ringl, Helmut, Apfaltrer, Paul

“…Purpose To assess a novel low-dose CT-protocol, combining a 150 kV spectral filtration unenhanced protocol (Sn150 kVp) and a stone-targeted dual-energy CT…”
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Dual-energy CT and ceramic or titanium prostheses material reduce CT artifacts and provide superior image quality of total knee arthroplasty by Kasparek, Maximilian F., Töpker, Michael, Lazar, Mathias, Weber, Michael, Kasparek, Michael, Mang, Thomas, Apfaltrer, Paul, Kubista, Bernd, Windhager, Reinhard, Ringl, Helmut

“…Purpose To evaluate the influence of different scan parameters for single-energy CT and dual-energy CT, as well as the impact of different material used in a…”
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Electronic cleansing of tagged residue in CT colonography: what radiologists need to know by Mang, Thomas, Bräuer, Christian, Gryspeerdt, Stefaan, Scharitzer, Martina, Ringl, Helmut, Lefere, Philippe

“…CT colonography (CTC) is the radiological examination of choice for the diagnosis of colorectal neoplasia. Faecal tagging is considered a mandatory part of…”
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Chest CT in patients after lung transplantation: A retrospective analysis to evaluate impact on image quality and radiation dose using spectral filtration tin-filtered imaging by Wressnegger, Alexander, Prosch, Helmut, Moser, Bernhard, Klepetko, Walter, Jaksch, Peter, Lambers, Christopher, Hoetzenecker, Konrad, Schestak, Christian, De Bettignies, Albert, Beer, Lucian, Apfaltrer, Georg, Ringl, Helmut, Apfaltrer, Paul

“…The purpose of this study was to investigate the impact of a 150kV spectral filtration chest imaging protocol (Sn150kVp) combined with advanced modeled…”
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Can dual-energy CT improve the assessment of tumor margins in oral cancer? by Toepker, Michael, Czerny, Christian, Ringl, Helmut, Fruehwald-Pallamar, Julia, Wolf, Florian, Weber, Michael, Ploder, Oliver, Klug, Clemens

“…Summary Objectives The aim was to investigate the image quality of dual-energy computed-tomography (DECT) compared to single-energy images at 80 kV and 140 kV…”
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Prevalence of Low Muscle Mass in the Computed Tomography at the Third Lumbar Vertebra Level Depends on Chosen Cut-Off in 200 Hospitalised Patients-A Prospective Observational Trial by Fischer, Arabella, Kiss, Noemi, Rudas, Valerie-Anna, Nieding, Kristina, Veraar, Cecilia, Timmermann, Isabel, Liebau, Konstantin, Pesta, Maximilian, Siebenrock, Timo, Anwar, Martin, Hahn, Ricarda, Hertwig, Anatol, Brugger, Jonas, Ringl, Helmut, Tamandl, Dietmar, Hiesmayr, Michael

“…Measuring skeletal muscle area (SMA) at the third lumbar vertebra level (L3) using computed tomography (CT) is increasingly popular for diagnosing low muscle…”
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4D perfusion CT of prostate cancer for image-guided radiotherapy planning: A proof of concept study by Beer, Lucian, Polanec, Stephan H, Baltzer, Pascal A T, Schatzl, Georg, Georg, Dietmar, Schestak, Christian, Dutschke, Anja, Herrmann, Harald, Mazal, Peter, Brendel, Alexander K, Shariat, Shahrokh F, Ringl, Helmut, Helbich, Thomas H, Apfaltrer, Paul

“…Advanced forms of prostate cancer (PCa) radiotherapy with either external beam therapy or brachytherapy delivery techniques aim for a focal boost and thus…”
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Impact on Image Quality and Radiation Dose of Third-Generation Dual-Source Computed Tomography of the Coronary Arteries by Apfaltrer, Georg, MD, Szolar, Dieter H., MD, Wurzinger, Eric, BSc, Takx, Richard A.P., MD, MSc, PhD, Nance, John W., MD, Dutschke, Anja, MD, Tschauner, Sebastian, MD, Loewe, Christian, MD, Ringl, Helmut, MD, Sorantin, Erich, MD, Apfaltrer, Paul, MD

“…The aim of this study was to assess the image quality (IQ) and radiation dose of third-generation dual-source computed tomography (CT) coronary angiography…”
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Personalized Reference Intervals Will Soon Become Standard in Radiology Reports by Ringl, Helmut

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Fractures of the head and neck of the femur in children: an outcome study by Hajdu, Stefan, Oberleitner, Gerhard, Schwendenwein, Elisabeth, Ringl, Helmut, Vécsei, Vilmos

“…Fractures of the head and neck of the femur in children are very rare, occurring only after a high-velocity trauma, e.g. a fall from a height. This analysis…”
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Post-surgical hemorrhagic infarction of the adrenal gland as the first clinical manifestation of antiphospholipid syndrome after 43 years of antibody-positivity by Haselboeck, Johanna, Ringl, Helmut, Mueller, Catharina, Pabinger, Ingrid, Winkler, Stefan

“…Abstract We report on a male patient who tested positive for antiphospholipid antibodies for 43 years without thromboembolic manifestation of antiphospholipid…”
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Comparison of Four Dual-Energy CT Scanner Technologies for Determining Renal Stone Composition Using a Phantom Approach by Ringl, Helmut, Apfaltrer, Paul

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Lossy three-dimensional JPEG2000 compression of abdominal CT images: assessment of the visually lossless threshold and effect of compression ratio on image quality by Ringl, Helmut, Schernthaner, Ruediger E, Kulinna-Cosentini, Christiane, Weber, Michael, Schaefer-Prokop, Cornelia, Herold, Christian J, Schima, Wolfgang

“…To retrospectively determine the maximum compression ratio at which compressed images are indistinguishable from the original by using a three-dimensional (3D)…”
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Comparison of Four Dual-Energy CT Scanner Technologies for Determining Renal Stone Composition Using a Phantom Approach by Ringl, Helmut, Apfaltrer, Paul

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Reply to Letter to the Editor: “Ultra-low-dose vs. standard-of-care-dose CT of the chest in patients with post-COVID-19 conditions—a prospective intra-patient multi-reader study” by Wassipaul, Christian, Ringl, Helmut, Prosch, Helmut, Heidinger, Benedikt H.

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Post-hepatectomy liver failure after major hepatic surgery: not only size matters by Asenbaum, Ulrika, Kaczirek, Klaus, Ba-Ssalamah, Ahmed, Ringl, Helmut, Schwarz, Christoph, Waneck, Fredrik, Fitschek, Fabian, Loewe, Christian, Nolz, Richard

“…Objectives To compare the value of functional future liver remnant (functFLR) to established clinical and imaging variables in prediction of post-hepatectomy…”
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Objective and subjective comparison of virtual monoenergetic vs. polychromatic images in patients with pancreatic ductal adenocarcinoma by Beer, Lucian, Toepker, Michael, Ba-Ssalamah, Ahmed, Schestak, Christian, Dutschke, Anja, Schindl, Martin, Wressnegger, Alexander, Ringl, Helmut, Apfaltrer, Paul

“…Objectives The aim of this study was to assess the objective and subjective image characteristics of monoenergetic images (MEI[+]), using a noise-optimized…”
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