Siemens Aktiengesellschaft

Guenter Theil

Wolfgang Rogler

Edgar Tschunt

Guenther Pausch

Hermann Riedl

Lothar Koob

Dietmar Lehne

The supply of current pulses to gradient coils in a magnetic resonance imaging tomography apparatus results in physical vibration of the coils, causing acoustic noise. For reducing such acoustic noise, a gradient coil system is disclosed wherein the individual gradient coils are secured on a tubular carrier formed by a two concentric shells. The two shells are joined to each other in a manner which is rigid against shearing in the longitudinal direction by connector elements. The self-excited vibrational behavior of the gradient coil system is thereby tuned to lower vibrational amplitudes and to higher vibrational frequencies, so that a more effective damping can be achieved with acoustic damping measures.

Gradient coil system for a nuclear magnetic resonance tomography

The invention relates to a patient positioning device with a pedestal on which a patient positioning plate is mounted for longitudinal displacement. At least one signal transmission device is to be applied to or used by the patient. On the patient positioning plate is provided at least one plug device for connection of the cable of the signal transmission device. A cable securely installed on the patient positioning plate leads from the plug device to the fixed apparatus part, the cable forming a loop to permit longitudinal displacement of the patient positioning plate.

Patient positioning device

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Erlangen, Germany

Guenter Theil