초록 ▼

An invasive device which is intended to cooperate with a magnetic resonance imaging apparatus is provided with an RF coil which is situated near a distal part of the invasive device. The RF coil is used so as to visualize the position of a distal end of the invasive device, introduced into an object

An invasive device which is intended to cooperate with a magnetic resonance imaging apparatus is provided with an RF coil which is situated near a distal part of the invasive device. The RF coil is used so as to visualize the position of a distal end of the invasive device, introduced into an object, in an image of the object. Current induced by an RF field to be generated by the magnetic resonance imaging apparatus develops heat in the electric connection between the RF coil and a control unit, which may be annoying to a patient. In order to counteract the development of heat in the invasive device, the invasive device is provided with a hollow carrier. The electric connection extends through said carrier which is provided with an electrically conductive shield with an additional resistance.

대표청구항 ▼

[ We claim:] [1.] An invasive device to be introduced into an object being imaged with a magnetic resonance imaging apparatus comprising:an elongate envelope which has a distal end and a proximal end,one or more RF coils which are arranged in the envelope,an electric connection for coupling the one

[ We claim:] [1.] An invasive device to be introduced into an object being imaged with a magnetic resonance imaging apparatus comprising:an elongate envelope which has a distal end and a proximal end,one or more RF coils which are arranged in the envelope,an electric connection for coupling the one or more RF coils to a control unit, anda hollow carrier which is in the envelope and which has a distal end and a proximal end, the electric connection extending through said hollow carrier, said hollow carrier comprising an electrically conductive shield which extends over a distance from the distal end to the proximal end of the hollow carrier, and which has an electric resistance over said distance which is substantially higher than the electric resistance of the electric connection over the same distance.