US 2011/0237931 A1 · MAGNETIC RESONANCE IMAGING APPARATUS AND SYNCHRONOUS IMAGING METHOD

Abstract

An imaging time is shortened by maintaining a desired image contrast in imaging synchronized with the periodic body movement information regarding the subject. In order to do so, in synchronous measurement of an echo signal synchronized with the trigger information detected from the periodic body movement information regarding the subject with periodic body movement, at least one of a first period before a measurement period of an echo signal and a second period after the measurement period of the echo signal is set, a K space is divided into a plurality of partial regions, and at least one of the first and second periods is set to be different in measurement of an echo signal corresponding to a partial region at a low spatial frequency side and measurement of an echo signal corresponding to a partial region at a high spatial frequency side.

Claims18

Dependent claims

A magnetic resonance imaging apparatus comprising:

a detector which detects trigger information from periodic body movement information of a subject;
a measurement controller which controls synchronous measurement for measuring an echo signal from the subject in synchronization with the trigger information;
and
an operation processor which acquires an image of the subject on the basis of K space data in which data of the echo signal is disposed in a K space,
wherein in the synchronous measurement, at least one of a first period before a measurement period of the echo signal and a second period after the measurement period of the echo signal is set,
the operation processor divides the K space into a plurality of partial regions, and
the measurement controller sets at least one of the first and second periods to be different in measurement of an echo signal corresponding to a partial region at a low spatial frequency side and measurement of an echo signal corresponding to a partial region at a high spatial frequency side.

4 more elements

A synchronous imaging method comprising:

a detection step of detecting trigger information from periodic body movement information of a subject;
a measurement control step of controlling synchronous measurement for measuring an echo signal from the subject in synchronization with the trigger information;
and
an arithmetic processing step of acquiring an image of the subject using the echo signal,
wherein in the synchronous measurement, at least one of a first period before a measurement period of the echo signal and a second period after the measurement period of the echo signal is set,
a step of dividing a K space where data of the echo signal is disposed into a plurality of partial regions is further included, and
in the measurement control step, at least one of the first and second periods is set to be different in measurement of an echo signal corresponding to a partial region at a low spatial frequency side and measurement of an echo signal corresponding to a partial region at a high spatial frequency side.

4 more elements

Dependencies are inferred from the claim text.

Magnetic resonance imaging apparatus and synchronous imaging method

Life of this patent

Magnetic resonance imaging apparatus and synchronous imaging method

Life of this patent

Abstract

Claims18