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Respiratory-Gated MRgHIFU in Upper Abdomen Using an MR-Compatible In-Bore Digital Camera
Joint Authors
Petrusca, Lorena
Becker, Christoph D.
Salomir, Rares
Auboiroux, Vincent
Viallon, Magalie
Montet, Xavier
Muller, Arnaud
Breguet, Romain
Terraz, Sylvain
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-01-29
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Objective.
To demonstrate the technical feasibility and the potential interest of using a digital optical camera inside the MR magnet bore for monitoring the breathing cycle and subsequently gating the PRFS MR thermometry, MR-ARFI measurement, and MRgHIFU sonication in the upper abdomen.
Materials and Methods.
A digital camera was reengineered to remove its magnetic parts and was further equipped with a 7 m long USB cable.
The system was electromagnetically shielded and operated inside the bore of a closed 3T clinical scanner.
Suitable triggers were generated based on real-time motion analysis of the images produced by the camera (resolution 640×480 pixels, 30 fps).
Respiratory-gated MR-ARFI prepared MRgHIFU ablation was performed in the kidney and liver of two sheep in vivo, under general anaesthesia and ventilator-driven forced breathing.
Results.
The optical device demonstrated very good MR compatibility.
The current setup permitted the acquisition of motion artefact-free and high resolution MR 2D ARFI and multiplanar interleaved PRFS thermometry (average SNR 30 in liver and 56 in kidney).
Microscopic histology indicated precise focal lesions with sharply delineated margins following the respiratory-gated HIFU sonications.
Conclusion.
The proof-of-concept for respiratory motion management in MRgHIFU using an in-bore digital camera has been validated in vivo.
American Psychological Association (APA)
Auboiroux, Vincent& Petrusca, Lorena& Viallon, Magalie& Muller, Arnaud& Terraz, Sylvain& Breguet, Romain…[et al.]. 2014. Respiratory-Gated MRgHIFU in Upper Abdomen Using an MR-Compatible In-Bore Digital Camera. BioMed Research International،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-470956
Modern Language Association (MLA)
Auboiroux, Vincent…[et al.]. Respiratory-Gated MRgHIFU in Upper Abdomen Using an MR-Compatible In-Bore Digital Camera. BioMed Research International No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-470956
American Medical Association (AMA)
Auboiroux, Vincent& Petrusca, Lorena& Viallon, Magalie& Muller, Arnaud& Terraz, Sylvain& Breguet, Romain…[et al.]. Respiratory-Gated MRgHIFU in Upper Abdomen Using an MR-Compatible In-Bore Digital Camera. BioMed Research International. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-470956
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-470956