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29 Si imaging of silicone breast implants and intraocular silicone oil
Author(s) -
Haselhorst Reta,
Scheffler Klaus,
Faletti Leonardo,
Kaspar Armin,
Prünte Christian,
Seelig Joachim
Publication year - 1998
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910400123
Subject(s) - silicone , silicone oil , materials science , biomedical engineering , silicone elastomers , nuclear medicine , medicine , composite material
Silicon‐29 ( 29 Si) imaging was investigated as a potential imaging modality for monitoring silicone prostheses in humans. The 29 Si relaxation times of several silicone gels were measured and found to average T 1 = 21.2 ± 1.5 s and T 2 = 207 ± 40 ms, with no significant difference between virgin and explanted gels. A single‐shot half‐Fourier rapid acquisition with relaxation enhancement (RARE) and a refocused gradientecho sequence were used for acquiring 29 Si images with 5 × 5 mm 2 resolution and no slice selection. Three volunteers with silicone‐gel‐filled breast implants and one subject with an intraocular silicone oil injection were thus examined in a total acquisition time of 10–15 min per image. On all 29 Si images, the shape of the silicone object was well depicted. Although at present, conventional proton images are superior in resolution and signal‐to‐noise ratio, 29 Si imaging has the advantage of optimal specificity, since only the silicone itself is visible.