Method of forming a series of MR images, and device for carrying out the method

US5502385A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Michael Harald Kuhn · Hamburg, DE
• Volker Rasche · Hamburg, DE
• Roland Proksa · Hamburg, DE

Key dates

• Filing date: Jun 8, 1994
• Grant date: Mar 26, 1996
• Expiry date: Jun 8, 2014

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/56308
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method of forming a series of MR images in which, in the presence of a steady magnetic field, sequences comprising at least an RF pulse and a magnetic gradient field which is varied from one sequence to another are continuously applied to the examination zone, from the image signals thus generated there being reconstructed MR images, the oldest MR signals used for the reconstruction of an MR image being replaced upon reconstruction of the next MR image by the respective newly generated MR signals. Low-artefact reproduction of dynamic processes in the examination zone can be achieved by varying the direction of the magnetic gradient field active during the generation of an MR signal from one sequence to another so that the range of the magnetic gradient field directions required for the reconstruction is distributed between the respective newly generated MR signals. The invention also relates to a device for carrying out this method.