Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine
Background: Impairment of pulmonary aeration is a frequent postoperative complication that is associated with adverse outcome. Diagnosis and quantification of impaired pulmonary aeration by CT scan is limited due to concern for exposure to ionizing radiation. Magnetic resonance imaging (MRI) represe...
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Frontiers Media S.A.
2019-06-01
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Online Access: | https://www.frontiersin.org/article/10.3389/fphys.2019.00695/full |
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record_format |
Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Eric Noll Eric Noll Eric Noll Mickael Ohana Maryse Hengen Maryse Hengen Elliott Bennett-Guerrero Michele Diana Celine Giraudeau Julien Pottecher Julien Pottecher Julien Pottecher Nicolas Meyer Nicolas Meyer Pierre Diemunsch Pierre Diemunsch Pierre Diemunsch |
spellingShingle |
Eric Noll Eric Noll Eric Noll Mickael Ohana Maryse Hengen Maryse Hengen Elliott Bennett-Guerrero Michele Diana Celine Giraudeau Julien Pottecher Julien Pottecher Julien Pottecher Nicolas Meyer Nicolas Meyer Pierre Diemunsch Pierre Diemunsch Pierre Diemunsch Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine Frontiers in Physiology lung imaging perioperative medicine postoperative pulmonary complications lung physiopathology alveolar recruitment |
author_facet |
Eric Noll Eric Noll Eric Noll Mickael Ohana Maryse Hengen Maryse Hengen Elliott Bennett-Guerrero Michele Diana Celine Giraudeau Julien Pottecher Julien Pottecher Julien Pottecher Nicolas Meyer Nicolas Meyer Pierre Diemunsch Pierre Diemunsch Pierre Diemunsch |
author_sort |
Eric Noll |
title |
Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine |
title_short |
Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine |
title_full |
Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine |
title_fullStr |
Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine |
title_full_unstemmed |
Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in Swine |
title_sort |
validation of mri for volumetric quantification of atelectasis in the perioperative period: an experimental study in swine |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Physiology |
issn |
1664-042X |
publishDate |
2019-06-01 |
description |
Background: Impairment of pulmonary aeration is a frequent postoperative complication that is associated with adverse outcome. Diagnosis and quantification of impaired pulmonary aeration by CT scan is limited due to concern for exposure to ionizing radiation. Magnetic resonance imaging (MRI) represents a potential radiation-free alternative for this use. We undertook an experimental study to validate the use of MRI to quantify pulmonary aeration impairment.Methods: Ten large white pigs were studied before intubation, after intubation, 2 h after non-protective mechanical ventilation and after intra-tracheal negative pressure suction to induce atelectasis. A lung CT scan immediately followed by a lung MRI were performed at all four time points. On the 40 CT images lung volumes corresponding to non-aerated, poorly aerated, normally aerated, and overinflated voxels were measured based on their radiodensity. Similarly, on the 40 MRI images lung volumes corresponding to non-aerated and aerated voxels were measured based on their signal intensity. The correlation between non-aerated lung by MRI vs., CT scans, and with PaO2/FiO2 measured at each of the four time points was assessed with the Pearson’ correlation coefficient, bias and limits of agreement.Results: Pearson correlation coefficient, bias and limits of agreements between the CT non-aerated lung volumes and MRI abnormal lung volumes were 0.88, -16 ml, and (-108, 77), respectively. Pearson correlation coefficient between PaO2/FiO2 and abnormal lung volumes measured with MRI was -0.60.Conclusion: In a preclinical swine model, quantitative measurements of pulmonary atelectasis by MRI-imaging are well correlated with the gold standard, i.e., densitometric scan CT measurements. |
topic |
lung imaging perioperative medicine postoperative pulmonary complications lung physiopathology alveolar recruitment |
url |
https://www.frontiersin.org/article/10.3389/fphys.2019.00695/full |
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doaj-4d83880b47f6480c85f7b83dcc45aa8f2020-11-24T21:55:11ZengFrontiers Media S.A.Frontiers in Physiology1664-042X2019-06-011010.3389/fphys.2019.00695447048Validation of MRI for Volumetric Quantification of Atelectasis in the Perioperative Period: An Experimental Study in SwineEric Noll0Eric Noll1Eric Noll2Mickael Ohana3Maryse Hengen4Maryse Hengen5Elliott Bennett-Guerrero6Michele Diana7Celine Giraudeau8Julien Pottecher9Julien Pottecher10Julien Pottecher11Nicolas Meyer12Nicolas Meyer13Pierre Diemunsch14Pierre Diemunsch15Pierre Diemunsch16Institut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceDepartment of Anesthesia and Intensive Care, Strasbourg University Hospital, Strasbourg, FranceFédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, Strasbourg, FranceDepartment of Radiology, Strasbourg University Hospital, Strasbourg, FranceInstitut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceDepartment of Anesthesia and Intensive Care, Strasbourg University Hospital, Strasbourg, FranceDepartment of Anesthesiology, Stony Brook Medicine, Stony Brook, NY, United StatesInstitut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceInstitut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceInstitut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceDepartment of Anesthesia and Intensive Care, Strasbourg University Hospital, Strasbourg, FranceFédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, Strasbourg, FranceDepartment of Public Health, Groupe Methodes en Recherche Clinique (GMRC), Strasbourg University Hospital, Strasbourg, FranceiCube, UMR7357, University of Strasbourg, Strasbourg, FranceInstitut Hospitalo-Universitaire “Image-Guided Surgery”, Université de Strasbourg, Strasbourg, FranceDepartment of Anesthesia and Intensive Care, Strasbourg University Hospital, Strasbourg, FranceFédération de Médecine Translationnelle de Strasbourg (FMTS), Faculté de Médecine, Institut de Physiologie, Université de Strasbourg, Strasbourg, FranceBackground: Impairment of pulmonary aeration is a frequent postoperative complication that is associated with adverse outcome. Diagnosis and quantification of impaired pulmonary aeration by CT scan is limited due to concern for exposure to ionizing radiation. Magnetic resonance imaging (MRI) represents a potential radiation-free alternative for this use. We undertook an experimental study to validate the use of MRI to quantify pulmonary aeration impairment.Methods: Ten large white pigs were studied before intubation, after intubation, 2 h after non-protective mechanical ventilation and after intra-tracheal negative pressure suction to induce atelectasis. A lung CT scan immediately followed by a lung MRI were performed at all four time points. On the 40 CT images lung volumes corresponding to non-aerated, poorly aerated, normally aerated, and overinflated voxels were measured based on their radiodensity. Similarly, on the 40 MRI images lung volumes corresponding to non-aerated and aerated voxels were measured based on their signal intensity. The correlation between non-aerated lung by MRI vs., CT scans, and with PaO2/FiO2 measured at each of the four time points was assessed with the Pearson’ correlation coefficient, bias and limits of agreement.Results: Pearson correlation coefficient, bias and limits of agreements between the CT non-aerated lung volumes and MRI abnormal lung volumes were 0.88, -16 ml, and (-108, 77), respectively. Pearson correlation coefficient between PaO2/FiO2 and abnormal lung volumes measured with MRI was -0.60.Conclusion: In a preclinical swine model, quantitative measurements of pulmonary atelectasis by MRI-imaging are well correlated with the gold standard, i.e., densitometric scan CT measurements.https://www.frontiersin.org/article/10.3389/fphys.2019.00695/fulllung imagingperioperative medicinepostoperative pulmonary complicationslung physiopathologyalveolar recruitment |