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05.08.2020 | Technical Report

Quantitative magnetic resonance imaging: differentiating soft tissue implants and fillers used in cosmetic and reconstructive surgery

verfasst von: Elodie Niasme, Benedicte M. A. Delattre, Vincent Lenoir, Ali Modarressi, Pierre-Alexandre Poletti, Minerva Becker, Sana Boudabbous

Erschienen in: Skeletal Radiology | Ausgabe 1/2021

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Abstract

Objective

To evaluate the value of synthetic magnetic resonance imaging (MRI) and T2 mapping in distinguishing between different types of fillers in soft tissues.

Materials and methods

Ex vivo fillers of buttock soft tissues (silicone, collagen, and different types of hyaluronic acid) were scanned using a synthetic MRI sequence at 1.5 and 3 T and an optimized T2 mapping sequence to measure the T2 relaxation times of the fillers ex vivo. Three patients addressed to assess complications with buttock fillers underwent MRI with the standard morphological sequences and an additional synthetic MRI sequence; T2 mapping was not performed for the patients. Two patients had silicone fillers, whereas the exact filler composition for the third patient was unknown.

Results

Measurements of T1 and T2 relaxation times of ex vivo fillers at 1.5 and 3 T using synthetic MRI showed that the silicone, collagen, and hyaluronic acid had distinct relaxation time characteristics. In vivo, the synthetic MRI correctly identified silicone in the two patients with known silicone fillers, showing low T1 and T2 values, whereas in the third patient with an unknown filler type, the synthetic MRI suggested a collagen filler, with intermediate relaxation time values.

Conclusion

Quantitative sequences have the potential to differentiate between filler types in a noninvasive fashion.

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Titel: Quantitative magnetic resonance imaging: differentiating soft tissue implants and fillers used in cosmetic and reconstructive surgery
verfasst von: Elodie Niasme
Benedicte M. A. Delattre
Vincent Lenoir
Ali Modarressi
Pierre-Alexandre Poletti
Minerva Becker
Sana Boudabbous
Publikationsdatum: 05.08.2020
Verlag: Springer Berlin Heidelberg
Erschienen in: Skeletal Radiology / Ausgabe 1/2021
Print ISSN: 0364-2348
Elektronische ISSN: 1432-2161
DOI: https://doi.org/10.1007/s00256-020-03564-z

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Quantitative magnetic resonance imaging: differentiating soft tissue implants and fillers used in cosmetic and reconstructive surgery