Meeting Banner
Abstract #1419

Measurement of Concentrations of Metal Ions in Pseudotumours Close to Metal-On-Metal Hips

Jessica Winfield1, Donald McRobbie1

1Imperial College Healthcare NHS Trust, London, United Kingdom

We present a method to use MRI to measure concentrations of metal ions in fluid-filled pseudotumours near metal-on-metal (MoM) hips. The method uses 3D gradient echo sequences which exhibit only moderate metal artefacts when a high receive bandwidth is employed. Measurements of T1 relaxation times can be used to place upper limits on concentrations of metal ions in fluid-filled lesions. The study forms part of the long-term follow-up of patients with painful and well-functioning MoM hips in order to investigate the clinical significance of pseudotumours and elevated levels of metal ions.

Abstract PDF Poster PDF

Keywords

acquisition agency alert aspirated association available bandwidth beginning blood bone chromium clinical clinically close cobalt college concentration concentrations containing cross debris determine device devices elevated errors examinations exhibited five fluid forms functioning gradient hart head healthy hips imperial implantation implanted indicates introduced investigate investigated ions issued joint kingdom least lesion lesions limits located locations longterm maps mars mass measure measured median medical medicines metal moderate near pain painful paramagnetic part patients phantom phantoms pixel place plan plastic presence press prevalence produce products protons rack reactions receive recommended reduced reduction regulatory replacement replacements reported respectively resurfacing revision routine samples scanned scanners sectional short significance significantly soft solutions spectrometry sufficiently suggested surgery tissue tissues trust undergoing unknown upper vials view volunteer water wear years