Method in the form of a pulse sequence for fast calculation of images of the fat and water distribution in an examination subject on the basis of nuclear magnetic resonance

US5079505A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Deimling · Baiersdorf, DE
• Wilfried Loeffler · Herzogenaurach, DE

Key dates

• Filing date: Aug 1, 1990
• Grant date: Jan 7, 1992
• Expiry date: Aug 1, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/4828
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pulse sequence for operating a magnetic resonance imaging apparatus for fast calculation of images of the fat and water distribution in an examination subject includes the steps of charging the examination subject with a first radio-frequency pulse which is selective with respect to a first spectral component and charging the examination subject with a second radio-frequency pulse which is selective with respect to a second spectral component. A dephasing gradient is activated between the two radio frequency pulses. The spin system is thus phase coded in two directions. A signal with respect to the second spectral component is read out under a first read-out gradient and a signal with respect to the first spectral component is read out under a second read-out gradient. Images of the fat and water distribution in the examination subject can thus be acquired with one measuring sequence.