| Autor: |
Felix G Meinel, Felix Schwab, Simone Schleede, Martin Bech, Julia Herzen, Klaus Achterhold, Sigrid Auweter, Fabian Bamberg, Ali Ö Yildirim, Alexander Bohla, Oliver Eickelberg, Rod Loewen, Martin Gifford, Ronald Ruth, Maximilian F Reiser, Franz Pfeiffer, Konstantin Nikolaou |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
PLoS ONE, Vol 8, Iss 3, p e59526 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
1932-6203 |
| DOI: |
10.1371/journal.pone.0059526 |
| Popis: |
PURPOSE: To assess whether grating-based X-ray dark-field imaging can increase the sensitivity of X-ray projection images in the diagnosis of pulmonary emphysema and allow for a more accurate assessment of emphysema distribution. MATERIALS AND METHODS: Lungs from three mice with pulmonary emphysema and three healthy mice were imaged ex vivo using a laser-driven compact synchrotron X-ray source. Median signal intensities of transmission (T), dark-field (V) and a combined parameter (normalized scatter) were compared between emphysema and control group. To determine the diagnostic value of each parameter in differentiating between healthy and emphysematous lung tissue, a receiver-operating-characteristic (ROC) curve analysis was performed both on a per-pixel and a per-individual basis. Parametric maps of emphysema distribution were generated using transmission, dark-field and normalized scatter signal and correlated with histopathology. RESULTS: Transmission values relative to water were higher for emphysematous lungs than for control lungs (1.11 vs. 1.06, p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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