Apparatus and pulse sequence method for MR tomography
US6404195B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/482
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a magnetic resonance tomography apparatus, and a pulse sequence for operating the apparatus, a radio frequency pulse, having a flip angle of &agr;/2 is emitted into a subject in a first pulse sequence section, by second and third pulse sequence sections in which a sequence of radio frequency pulses is emitted, each having a flip angle &agr; and a repetition time which is lower than the T1 and T2 relaxation times of the subject, the subject eventually reaching a steady state equilibrium condition after which the third pulse sequence section begins. In the third pulse sequence section, magnetic signals are read out from the subject with a phase coding, the phase coding being reset before the next radio frequency pulse in the sequence. The magnetic resonance signals are entered into a k-space matrix sorted according to the phase coding phase factors, and the phase coding is conducted in the third pulse sequence section so that the magnetic resonance signals for the central rows of the k-space matrix are acquired at the beginning of the third pulse sequence section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.