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Journal articles
Early postsurgical visualization of composite mesh used in ventral hernia repair by amide proton transfer MRI.: Composite Mesh Visualization by APT MRI
Abstract : PURPOSE: The feasibility of noninvasive visualization of composite meshes used in ventral hernia repair by amide-proton transfer magnetic resonance imaging (APT-MRI) was explored. METHODS: Magnetization transfer asymmetry ratio images of composite meshes were obtained in vitro and in vivo from fast-spin echo acquisitions with frequency saturation offsets of ±3.5 ppm with respect to water frequency and no saturation. Three rats were assessed with APT-MRI each week for 1 month after the intraperitoneal implantation of two meshes, one on each side of the incision. One mesh was coated with collagen and the other was not. RESULTS: In vitro, meshes were delineated with APT-MRI as a thin continuous linear hypersignal located on one side of the mesh. Unlike collagen-free meshes, collagen-coated meshes were easily identified in vivo with APT-MRI during the first 3 weeks postimplantation. The composite meshes magnetization transfer asymmetry ratio (8.7 ± 2.8%) were significantly different from the muscle magnetization transfer asymmetry ratio value (-0.9 ± 1.6%). After a month, the mesh value dropped down to 1.1 ± 3.9%. Muscle and mesh magnetization transfer asymmetry ratio values were not significantly different and mesh conspicuity was no longer possible. CONCLUSION: The results suggest that APT-MRI is a promising technique for noninvasive, early postsurgical visualization of composite meshes used in ventral hernia repair. Magn Reson Med, 2013. © 2013 Wiley Periodicals, Inc.
Cited literature [17 references]
https://www.hal.inserm.fr/inserm-00793045
Contributor : Laurent Lemaire <>
Submitted on : Thursday, February 21, 2013 - 2:34:14 PM
Last modification on : Sunday, May 24, 2020 - 2:18:04 AM
Long-term archiving on: : Sunday, April 2, 2017 - 3:35:04 AM
Contributor : Laurent Lemaire <>
Submitted on : Thursday, February 21, 2013 - 2:34:14 PM
Last modification on : Sunday, May 24, 2020 - 2:18:04 AM
Long-term archiving on: : Sunday, April 2, 2017 - 3:35:04 AM