Nuclear magnetic resonance tomography apparatus

US4701710A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ludger Freisen, deceased · Erlangen, DE
• Helmut Kess · Erlangen, DE
• Norbert Krause · Bubenreuth, DE
• Ralph Meissner · Erlangen, DE

Key dates

• Filing date: May 22, 1985
• Grant date: Oct 20, 1987
• Expiry date: May 22, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/34046
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For the representation of images of regions selected from the interior of an examination subject, coils are provided for the application of a primary magnetic field and of magnetic gradient fields to the examination subject. An electrical conductor configuration detects the deflection of the atomic nuclei of the examination subject from their position of equilibrium as a result of high frequency magnetic excitation pulses. The configuration is formed by two interspersed individual conductor configurations adapted for respective different measurement frequencies. Each configuration comprises parallel conductors connected at their ends and arranged in spaced relation to an electrically grounded surface to form a transmission line configuration resonant at a respective one of the measurement frequencies.