In vitro behaviour of mechanical heart valves in a 1.5 T superconducting magnet

摘要: During in vitro tests, we exposed seven mechanical cardiac valves to a 1.5 Tesla magnetic field and measured their deflection temperature changes during gradient-echo sequence. We used special suspension system which indicated the largest at entrance tube any deflections within gradient field. A sensor valve ring both air water bath exposure high-frequency The Bjork-Shiley (Shiley Irvine, CA, USA) displayed most coil, namely 1.8 mm. All other models less deflection. No took place sequences. Three an increase temperature. Medtronic with 0.6°C.