Method for magnetic resonance image acquisition and reconstruction of the basic of wavelet encoding

US5821751A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Wendt · Erlangen, DE
• Martin Busch · Grafing, DE

Key dates

• Filing date: Nov 14, 1996
• Grant date: Oct 13, 1998
• Expiry date: Nov 14, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/5613
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For obtaining image information from a subject, in an excitation phase nuclear resonance signals are excited with wavelet-encoding by emitting a radio-frequency pulse under the influence of a gradient in a first direction, the pulse having an envelope that corresponds to the Fourier transforms of a wavelet function. In addition, a layer selection is achieved by the application of an oscillating gradient in a second direction. In a readout phase, a gradient echo signal is sampled under the influence of a readout gradient in a third direction. The pulse sequence can be repeated with a repetition time that is shorter than the longitudinal and transverse relaxation time, so that a steady state arises.