Katharina Hellbach
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View article: Outcome of the novel description of arterial position changes after major liver resections: retrospective study
Outcome of the novel description of arterial position changes after major liver resections: retrospective study Open
Background After major liver resections, anatomical shifts due to liver parenchymal hypertrophy and organ displacement can happen. The aim of this study was to evaluate the impact of these anatomical changes on the main abdominal arteries …
View article: Quantitative differentiation of minimal-fat angiomyolipomas from renal cell carcinomas using grating-based x-ray phase-contrast computed tomography: An ex vivo study
Quantitative differentiation of minimal-fat angiomyolipomas from renal cell carcinomas using grating-based x-ray phase-contrast computed tomography: An ex vivo study Open
Background The differentiation of minimal-fat—or low-fat—angiomyolipomas from other renal lesions is clinically challenging in conventional computed tomography. In this work, we have assessed the potential of grating-based x-ray phase-cont…
View article: Quantitative differentiation of minimal-fat angiomyolipomas from renal cell carcinomas using grating-based x-ray phase-contrast computed tomography: an ex vivo study
Quantitative differentiation of minimal-fat angiomyolipomas from renal cell carcinomas using grating-based x-ray phase-contrast computed tomography: an ex vivo study Open
Background The differentiation of minimal-fat—or low-fat—angiomyolipomas from other renal lesions is clinically challenging in conventional computed tomography. In this work, we have assessed the potential of grating-based x-ray phase-cont…
View article: Simultaneous presence of the “bullseye” and “reversed halo” sign at CT of COVID-19 pneumonia: A case report
Simultaneous presence of the “bullseye” and “reversed halo” sign at CT of COVID-19 pneumonia: A case report Open
The "bullseye" sign has been exclusively reported in patients suffering from coronavirus disease 2019 (COVID-19) pneumonia. It is theorized that this newly recognized computed tomography (CT) feature represents a sign of organizing pneumon…
View article: Diagnostic accuracy of magnetic resonance imaging for the detection of pulmonary nodules simulated in a dedicated porcine chest phantom
Diagnostic accuracy of magnetic resonance imaging for the detection of pulmonary nodules simulated in a dedicated porcine chest phantom Open
Objective CT serves as gold standard for the evaluation of pulmonary nodules. However, CT exposes patients to ionizing radiation, a concern especially in screening scenarios with repeated examinations. Due to recent technological advances,…
View article: A proof-of principal study using phase-contrast imaging for the detection of large airway pathologies after lung transplantation
A proof-of principal study using phase-contrast imaging for the detection of large airway pathologies after lung transplantation Open
In this study we aim to evaluate the assessment of bronchial pathologies in a murine model of lung transplantation with grating-based X-ray interferometry in vivo. Imaging was performed using a dedicated grating-based small-animal X-ray da…
View article: Contrast-to-noise ratios and thickness-normalized, ventilation-dependent signal levels in dark-field and conventional in vivo thorax radiographs of two pigs
Contrast-to-noise ratios and thickness-normalized, ventilation-dependent signal levels in dark-field and conventional in vivo thorax radiographs of two pigs Open
Lung tissue causes significant small-angle X-ray scattering, which can be visualized with grating-based X-ray dark-field imaging. Structural lung diseases alter alveolar microstructure, which often causes a dark-field signal decrease. The …
View article: Exploration of different x-ray Talbot–Lau setups for dark-field lung imaging examined in a porcine lung
Exploration of different x-ray Talbot–Lau setups for dark-field lung imaging examined in a porcine lung Open
X-ray dark-field imaging is a promising technique for lung diagnosis. Due to the alveolar structure of lung tissue, a higher contrast is obtained by the dark-field image compared to the attenuation image. Animal studies indicate an enhance…
View article: X-ray dark-field imaging of the human lung—A feasibility study on a deceased body
X-ray dark-field imaging of the human lung—A feasibility study on a deceased body Open
Disorders of the lungs such as chronic obstructive pulmonary disease (COPD) are a major cause of chronic morbidity and mortality and the third leading cause of death in the world. The absence of sensitive diagnostic tests for early disease…
View article: X-Ray Dark-field Imaging to Depict Acute Lung Inflammation in Mice
X-Ray Dark-field Imaging to Depict Acute Lung Inflammation in Mice Open
The aim of this study was to evaluate the feasibility of early stage imaging of acute lung inflammation in mice using grating-based X-ray dark-field imaging in vivo . Acute lung inflammation was induced in mice by orotracheal instillation …
View article: X-ray Dark-field Radiography - In-Vivo Diagnosis of Lung Cancer in Mice
X-ray Dark-field Radiography - In-Vivo Diagnosis of Lung Cancer in Mice Open
Accounting for about 1.5 million deaths annually, lung cancer is the prevailing cause of cancer deaths worldwide, mostly associated with long-term smoking effects. Numerous small-animal studies are performed currently in order to better un…
View article: First experiences with in-vivo x-ray dark-field imaging of lung cancer in mice
First experiences with in-vivo x-ray dark-field imaging of lung cancer in mice Open
Purpose: The purpose of the present study was to evaluate if x-ray dark-field imaging can help to visualize lung cancer in mice. Materials and Methods: The experiments were performed using mutant mice with high-grade adenocarcinomas. Eight…
View article: Visualization of neonatal lung injury associated with mechanical ventilation using x-ray dark-field radiography
Visualization of neonatal lung injury associated with mechanical ventilation using x-ray dark-field radiography Open
Mechanical ventilation (MV) and supplementation of oxygen-enriched gas, often needed in postnatal resuscitation procedures, are known to be main risk factors for impaired pulmonary development in the preterm and term neonates. Unfortunatel…