Search Results - "Kähn, Johannes"

Relationship of Dose and Signal Enhancement Properties of Gadoquatrane, a New Tetrameric, Macrocyclic Gadolinium-Based Contrast Agent, Compared With Gadobutrol: A Randomized Crossover Study in Healthy Adults by Hofmann, Birte M, Riecke, Kai, Klein, Stefan, Klemens, Mark A, Palkowitsch, Petra, Kahn, Johannes F, Posch, Helena, Berse, Matthias, Ebert, Wolfgang

“…To investigate the signal-enhancement properties of the tetrameric gadolinium-based contrast agent (GBCA) gadoquatrane in relation to the administered dose and…”
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How does arm positioning of polytraumatized patients in the initial computed tomography (CT) affect image quality and diagnostic accuracy? by Kahn, Johannes, Grupp, Ulrich, Maurer, Martin

“…Abstract Purpose To evaluate the influence of different arm positions on abdominal image quality during initial whole-body CT (WBCT) in polytraumatized…”
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Detectability of foreign body materials using X-ray, computed tomography and magnetic resonance imaging: A phantom study by Voss, Jan Oliver, Doll, Christian, Raguse, Jan D., Beck-Broichsitter, Benedicta, Walter-Rittel, Thula, Kahn, Johannes, Böning, Georg, Maier, Christoph, Thieme, Nadine

“…•Detectability of foreign bodies strongly depends on material and imaging modality.•Organic and plastic objects can be challenging or impossible to detect…”
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Spectral Computed Tomography-Derived Iodine Content and Tumor Response in the Follow-Up of Neuroendocrine Tumors-A Single-Center Experience by Lim, Winna, Sodemann, Elisa Birgit, Büttner, Laura, Jonczyk, Martin, Lüdemann, Willie Magnus, Kahn, Johannes, Geisel, Dominik, Jann, Henning, Aigner, Annette, Böning, Georg

“…Spectral computed tomography (SCT) allows iodine content (IC) calculation for characterization of hypervascularized neoplasms and thus might help in the…”
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TSI ultrasound elastography for the diagnosis of chronic allograft nephropathy in kidney transplanted patients by Kahn, Johannes, Slowinski, Torsten, Thomas, Anke, Filimonow, Sergej, Fischer, Thomas

“…To answer the question whether the TSI (tissue strain imaging) sonoelastography technique can contribute to the diagnosis of chronic renal allograft damage. A…”
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Investigating the annealing dependency of Al/Si distribution in Eifel sanidine by Kähn, Johannes, Többens, Daniel, Hoffmann, Jens-Uwe, Reehuis, Manfred, Schorr, Susan

“…Abstract only Sanidine is the monoclinic high-T modification of K-rich alkalifeldspars. Annealing at T > 900 0 C usually causes disordering of Al/Si…”
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Interfacial tension between immiscible liquids in alkaline earth – boron oxide binary systems by Veksler, Ilya V., Kähn, Johannes, Dingwell, Donald B.

“…Liquid immiscibility is common in glass-forming oxide melts, and interfacial tension between the conjugate liquid phases is an important property that…”
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Is There Long-term Signal Intensity Increase in the Central Nervous System on T1-weighted Images after MR Imaging with the Hepatospecific Contrast Agent Gadoxetic Acid? A Cross-sectional Study in 91 Patients by Kahn, Johannes, Posch, Helena, Steffen, Ingo G, Geisel, Dominik, Bauknecht, Christian, Liebig, Thomas, Denecke, Timm

“…Purpose To evaluate whether there is T1-weighted signal intensity (SI) increase in the dentate nucleus (DN) and globus pallidus (GP) in relation to the middle…”
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High-grade astrocytoma with piloid features (HGAP): the Charité experience with a new central nervous system tumor entity by Bender, Katja, Perez, Eilís, Chirica, Mihaela, Onken, Julia, Kahn, Johannes, Brenner, Winfried, Ehret, Felix, Euskirchen, Philipp, Koch, Arend, Capper, David, Kaul, David

“…Purpose High-grade astrocytoma with piloid features (HGAP) is a recently described brain tumor entity defined by a specific DNA methylation profile. HGAP has…”
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1817: Validation of a Methylation-based Signature for Subventricular Zone Involvement in Glioblastoma by Ehret, Felix, Zühlke, Oliver, Schweizer, Leonille, Csapo-Schmidt, Christoph, Kahn, Johannes, Roohani, Siyer, Zips, Daniel, capper, david, adeberg, sebastian, Knoll, Maximilian, kaul, david

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Yttrium-90 radioembolization for unresectable hepatocellular carcinoma: predictive modeling strategies to anticipate tumor response and improve patient selection by Lüdemann, Willie, Kahn, Johannes, Pustelnik, Daniel, Hardt, Juliane, Böning, Georg, Jonczyk, Martin, Amthauer, Holger, Gebauer, Bernhard, Hamm, Bernd, Wieners, Gero

“…Objectives This study aims to better characterize potential responders of Y-90-radioembolization at baseline through analysis of clinical variables and…”
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Validation of a methylation-based signature for subventricular zone involvement in glioblastoma by Ehret, Felix, Zühlke, Oliver, Schweizer, Leonille, Kahn, Johannes, Csapo-Schmidt, Christoph, Roohani, Siyer, Zips, Daniel, Capper, David, Adeberg, Sebastian, Abdollahi, Amir, Knoll, Maximilian, Kaul, David

“…Purpose Glioblastomas (GBM) with subventricular zone (SVZ) contact have previously been associated with a specific epigenetic fingerprint. We aim to validate a…”
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Diffuse paediatric-type high-grade glioma, H3-wildtype and IDH-wildtype: case series of a new entity by Bender, Katja, Kahn, Johannes, Perez, Eilís, Ehret, Felix, Roohani, Siyer, Capper, David, Schmid, Simone, Kaul, David

“…Diffuse paediatric-type high-grade glioma, H3-wildtype and IDH-wildtype (pHGG) is a rare and aggressive brain tumor characterized by a specific DNA methylation…”
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MR Imaging Volumetric Response after Yttrium-90 Radioembolization for Colorectal Liver Metastases: Predictability at Baseline and Correlation with Survival by Lüdemann, Willie-Magnus, Wieners, Gero, Franz, Klaus, Hardt, Juliane, Pustelnik, Daniel, Böning, Georg, Amthauer, Holger, Gebauer, Bernhard, Kahn, Johannes

“…To prove the utility of magnetic resonance (MR) imaging response as a surrogate end point of treatment efficacy and survival after yttrium-90 transarterial…”
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Spectral CT in patients with acute thoracoabdominal bleeding—a safe technique to improve diagnostic confidence and reduce dose? by Kahn, Johannes, Fehrenbach, Uli, Böning, Georg, Feldhaus, Felix, Maurer, Martin, Renz, Diane, Streitparth, Florian

“…Computed tomography (CT) protocols for the detection of bleeding sources often include unenhanced CT series to distinguish contrast agent extravasation from…”
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Stepwise analysis of potential accuracy-influencing factors of iodine quantification on a fast kVp-switching second-generation dual-energy CT: from 3D-printed phantom to a simple solution in clinical routine use by Böning, Georg, Jahnke, Paul, Feldhaus, Felix, Fehrenbach, Uli, Kahn, Johannes, Hamm, Bernd, Streitparth, Florian

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Metallic dental artifact reduction in computed tomography (Smart MAR): Improvement of image quality and diagnostic confidence in patients with suspected head and neck pathology and oral implants by Feldhaus, Felix, Böning, Georg, Jonczyk, Martin, Kahn, Johannes, Fehrenbach, Uli, Maurer, M., Renz, D., Hamm, Bernd, Streitparth, Florian

“…We determined whether the Smart MAR metal artifact reduction tool - a three-stage, projection-based, post processing algorithm - improves subjective and…”
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Reducing radiation dose in the diagnosis of pulmonary embolism using adaptive statistical iterative reconstruction and lower tube potential in computed tomography by Kaul, David, Grupp, Ulrich, Kahn, Johannes, Ghadjar, Pirus, Wiener, Edzard, Hamm, Bernd, Streitparth, Florian

“…Objectives To assess the impact of ASIR (adaptive statistical iterative reconstruction) and lower tube potential on dose reduction and image quality in chest…”
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Comparing HCC arterial tumour vascularisation on baseline imaging and after lipiodol cTACE: how do estimations of enhancing tumour volumes differ on contrast-enhanced MR and CT? by Luedemann, Willie Magnus, Geisel, Dominik, Gebauer, Bernhard, Schnapauff, Dirk, Chapiro, Julius, Wieners, Gero, Steffen, Ingo, Kahn, Johannes

“…Objectives In this study, pre-treatment target lesion vascularisation in either contrast-enhanced (CE) CT or MRI and post-treatment lipiodol deposition in…”
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Computed tomography in trauma patients using iterative reconstruction: reducing radiation exposure without loss of image quality by Kahn, Johannes, Grupp, Ulrich, Kaul, David, Böning, Georg, Lindner, Tobias, Streitparth, Florian

“…Rising numbers of computed tomography (CT) examinations worldwide have led to a focus on dose reduction in the latest developments in CT technology. Iterative…”
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