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Your search keyword '"Wenker, Mirja"' showing total 19 results
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19 results on '"Wenker, Mirja"'

1. Lösungen

Author

Vockelmann, Christel, Wenker, Mirja, Kahl-Scholz, Martina, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2023
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2. Klinische Fälle

Author

Vockelmann, Christel, Wenker, Mirja, Kahl-Scholz, Martina, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2023
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6. Clinical Cases

Author

Wenker, Mirja, Vockelmann, Christel, Kahl-Scholz, Martina, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2023
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7. Musculoskeletal Diseases

Author

Wenker, Mirja, Vockelmann, Christel, Blum, Ursula, Heilsberg, Guido, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2023
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8. Solutions

Author

Wenker, Mirja, Kahl-Scholz, Martina, Vockelmann, Christel, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2023
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10. Lösungen

Author

Wenker, Mirja, Kahl-Scholz, Martina, Vockelmann, Christel, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2017
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12. Klinische Fälle

Author

Wenker, Mirja, Vockelmann, Christel, Kahl-Scholz, Martina, Kahl-Scholz, Martina, editor, and Vockelmann, Christel, editor

Published
2017
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17. MRCP – alternatives to oral contrast agents containing iron oxide

Author

Wenker, Mirja

Subjects
genetic structures, Gastrointestinal tract, Contrast agent-oral, Tissue characterisation, MR, Contrast agents
Abstract

Aims and objectives Methods and materials Results Conclusion Personal information References, Aims and objectives: Negative oral MRI-contrast agents are used in magnetic resonance cholangiopancreatography to decrease the normally high signal intensity of the gastrointestinal tract. For some time now negative oral MRI-contrast agents containing iron oxide have...

Published
2015
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19. Automated threshold-based 3D segmentation versus short-axis planimetry for assessment of global left ventricular function with dual-source MDCT.

Author

Juergens KU, Seifarth H, Range F, Wienbeck S, Wenker M, Heindel W, and Fischbach R

Subjects
Adult, Aged, Aged, 80 and over, Algorithms, Coronary Artery Disease complications, Coronary Artery Disease diagnostic imaging, Female, Humans, Male, Middle Aged, Reproducibility of Results, Sensitivity and Specificity, Tomography, X-Ray Computed instrumentation, Ventricular Dysfunction, Left etiology, Artificial Intelligence, Imaging, Three-Dimensional methods, Pattern Recognition, Automated methods, Radiographic Image Enhancement methods, Radiographic Image Interpretation, Computer-Assisted methods, Tomography, X-Ray Computed methods, Ventricular Dysfunction, Left diagnostic imaging
Abstract

Objective: The purpose of this study was to evaluate software for threshold-based 3D segmentation of the left ventricle in comparison with traditional 2D short axis-based planimetry (Simpson method) for measurement of left ventricular (LV) volume and global function with state-of-the-art dual-source CT., Subjects and Methods: Fifty patients with known or suspected coronary artery disease underwent coronary CT angiography. LV end-diastolic, end-systolic, and stroke volumes and ejection fraction were determined from axial images to which 3D segmentation had been applied and from short-axis reformations from 2D planimetry. Interobserver variability was assessed for both approaches., Results: Threshold-based 3D LV segmentation had excellent correlation with 2D short-axis results (end-diastolic volume, R = 0.99; end-systolic volume, R = 0.99; stroke volume, R = 0.90; ejection fraction, R = 0.97; p < 0.0001). Bland-Altman analyses revealed systematic underestimation of LV end-diastolic volume (-7.4 +/- 8.9 mL) and LV end-systolic volume (-7.0 +/- 4.4 mL) with the 3D segmentation approach and 2.8 +/- 3.3% overestimation of LV ejection fraction. Interobserver variation with 3D segmentation analysis was significantly (p < 0.001) less (e.g., LV ejection fraction, 0.1 +/- 1.7%) than with the 2D technique, and mean analysis time was significantly shorter (172 +/- 20 vs 248 +/- 29 seconds; p < 0.05)., Conclusion: Automated threshold-based 3D segmentation enables accurate and reproducible dual-source CT assessment of LV volume and function with excellent correlation with results of 2D short-axis analysis. Exclusion of papillary muscles from LV volume results in small systematic differences in quantitative values.

Published
2008
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