Georg Frese

Comparison of the threshold for peripheral nerve stimulation during gradient switching in whole body MR systems

To compare thresholds for peripheral nerve stimulation from gradient switching in whole body magnetic resonance (MR) equipment of different design.

Structure for homogenizing the fundamental field in a nuclear magnetic resonance examination apparatus

A structure for homogenizing the fundamental field in a nuclear magnetic resonance examination apparatus has a plurality of rods consisting at least partially of ferromagnetic material and a structure for supporting the rods in the fundamental magnetic field. The supporting structure may be in the form of rings with the rods extending therethrough at selected positions, either individually or in groups. The location, cross-section, length, shape and number of rods are selected as needed for homogenizing the fundamental field.

Sicherheit und Grenzwerte in der MRT

The influence of electromagnetic fields on humans through the use of magnetic resonance tomography is an ongoing topic in the scientific literature. However, the contents of relevant standards and legal regulations governing the operation of MR equipment are less well known. We summarize the actual status and give an overview of the national and international bodies in charge of generation and publication of guidelines and regulations.