Method for operating a magnetic resonance imaging apparatus

US5541514A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Oliver Heid · Erlangen, DE
• Michael Deimling · Baiersdorf, DE

Key dates

• Filing date: Aug 2, 1995
• Grant date: Jul 30, 1996
• Expiry date: Aug 2, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/561
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a steady-state pulse sequence having a repetition time and a flip angle .alpha. with alternating polarity for operating a magnetic resonance imaging apparatus, the excursion of the magnetization in the steady-state condition moves between a first value +.alpha./2 and a second value -.alpha./2. Before the beginning of the pulse sequence, a radiofrequency pulse having a flip angle .alpha./2 is emitted before the first excitation pulse. The steady-state condition is thus reached earlier and a spin preparation can be implemented which is still effective when imaging data are acquired.