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Erschienen in: European Radiology 1/2024

09.08.2023 | Breast

Breast MRI in patients with implantable loop recorder: initial experience

verfasst von: Noam Nissan, Rosa Elena Ochoa-Albiztegui, Hila Fruchtman, Jill Gluskin, Sarah Eskreis-Winkler, Joao V. Horvat, Ioanna Kosmidou, Alicia Meng, Katja Pinker, Maxine S. Jochelson

Erschienen in: European Radiology | Ausgabe 1/2024

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Abstract

Objectives

To investigate the feasibility of breast MRI exams and guided biopsies in patients with an implantable loop recorder (ILR) as well as the impact ILRs may have on image interpretation.

Materials and methods

This retrospective study examined breast MRIs of patients with ILR, from April 2008 to September 2022. Radiological reports and electronic medical records were reviewed for demographic characteristics, safety concerns, and imaging findings. MR images were analyzed and compared statistically for artifact quantification on the various pulse sequences.

Results

Overall, 40/82,778 (0.049%) MRIs during the study period included ILR. All MRIs were completed without early termination. No patient-related or device-related adverse events occurred. ILRs were most commonly located in the left lower-inner quadrant (64.6%). The main artifact was a signal intensity (SI) void in a dipole formation in the ILR bed with or without areas of peripheral high SI. Artifacts appeared greatest in the cranio-caudal axis (p < 0.001), followed by the anterior–posterior axis (p < 0.001), and then the right–left axis. High peripheral rim-like SI artifacts appeared on the post-contrast and subtracted T1-weighted images, mimicking suspicious enhancement. Artifacts were most prominent on diffusion-weighted (p < 0.001), followed by T2-weighted and T1-weighted images. In eight patients, suspicious findings were found on MRI, resulting in four additional malignant lesions. Of six patients with left breast cancer, the tumor was completely visible in five cases and partially obscured in one.

Conclusion

Breast MRI is feasible and safe among patients with ILR and may provide a significant diagnostic value, albeit with localized, characteristic artifacts.

Clinical relevance statement

Indicated breast MRI exams and guided biopsies can be safely performed in patients with implantable loop recorder. Nevertheless, radiologists should be aware of associated limitations including limited assessment of the inner left breast and pseudo-enhancement artifacts.

Key Points

Breast MRI in patients with an implantable loop recorder is an infrequent, feasible, and safe procedure.
Despite limited breast visualization of the implantable loop recorder bed and characteristic artifacts, MRI depicted additional lesions in 8/40 (20%) of cases, half of which were malignant.
Breast MRI in patients with an implantable loop recorder should be performed when indicated, taking into consideration typical associated artifacts.
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Metadaten
Titel
Breast MRI in patients with implantable loop recorder: initial experience
verfasst von
Noam Nissan
Rosa Elena Ochoa-Albiztegui
Hila Fruchtman
Jill Gluskin
Sarah Eskreis-Winkler
Joao V. Horvat
Ioanna Kosmidou
Alicia Meng
Katja Pinker
Maxine S. Jochelson
Publikationsdatum
09.08.2023
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 1/2024
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-023-10025-3

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