RESUMO
To determine the optimal coil and patient position for magnetic resonance imaging of patients with silicone breast implants, images obtained with body, circular surface, flexible, single shoulder, and dual shoulder coils in various numbers of patients were compared with regard to signal-to-noise ratio (S/N), decay of signal intensity, resolution, and key area coverage. Images obtained with the dual shoulder coil and prone position, with a customized positioning device, gave the best S/N, resolution, and coverage of the breasts and axillae.
Assuntos
Mama/patologia , Imageamento por Ressonância Magnética/métodos , Próteses e Implantes , Silicones , Feminino , Humanos , MamoplastiaRESUMO
This study was designed to evaluate pulse sequences and patient positioning for MR imaging of silicone breast implants in patients. One hundred forty-three patients (281 silicone implants) underwent imaging over a 21-month period. The combination of a T2-weighted fast spin echo technique (SE), T2-weighted fast SE with water suppression, and T1-weighted SE with fat suppression is recommended to reliably differentiate silicone from other breast tissues and to identify intracapsular and extracapsular ruptures or leaks. Seventy of the 143 patients underwent removal of their silicone implants. The sensitivity for detection of silicone implant rupture was 76%, with a specificity of 97%. Positioning the patient prone improved image quality.
