Heating of non-ferromagnetic total hip endoprostheses during magnetic resonance imaging in an animal model.
To determine the heating effects of magnetic resonance imaging (MRI) on non-ferromagnetic total hip endoprostheses, hip endoprostheses were tested in vitro and in an ex vivo animal model. The MRI protocol on a 1.5 T scanner consisted of five sequences with a total duration of 23 min. The maximum heating of prosthetic material was 0.17 K in vitro and 0.90 K ex vivo; the maximum heating of bone surrounding tissue was 0.73 K ex vivo. Slight heating of the prostheses and the surrounding tissue was noted, which should not have any side effects in patients with titanium total hip endoprostheses.
Institute of Diagnostic and Interventional Radiology, Ruhr University, St Josef Hospital, Bochum, Germany.
Robert
R
Drescher
Martin
M
Kahle
Odo
O
Koester
Alexej
A
Titschert
D000818:Animals; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects; D006622:Hip Prosthesis; D006358:Hot Temperature; D008279:Magnetic Resonance Imaging; D008422:Materials Testing; D023421:Models, Animal