MAGNETIC RESONANCE IMAGING APPARATUS AND IMAGE GENERATING METHOD
First Claim
1. A magnetic resonance imaging apparatus configured to acquire magnetic resonance signals from a navigator area containing a plurality of body-moved regions of a subject as first navigator data by repeatedly executing a first navigator sequence to acquire magnetic resonance signals from the navigator area as second navigator data by repeatedly executing a second navigator sequence, to acquire magnetic resonance signals from an imaging area at the subject as imaging data using an imaging sequence, the imaging data based on the positions of the plurality of regions obtained from the second navigator data, the positions based on the first navigator data, and to generate an image, based on the raw data, said magnetic resonance imaging apparatus comprising:
- a first navigator data processor configured to;
generate a phase profile for each of the first navigator data as a first phase profile with respect to each of the first navigator data;
detect a position of each region with respect to each first phase profile;
generate a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is repeatedly executed; and
detect a specific position in the position profile;
a second navigator data processor configured to;
generate a phase profile for each of the second navigator data as a second phase profile with respect to each of the second navigator data;
detect the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile; and
acquire the same as its corresponding position data; and
a raw data acquiring unit configured to acquire imaging data as raw data, the imaging data obtained by the imaging sequence corresponding to the second navigator sequence, based on the position data.
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Accused Products
Abstract
A magnetic resonance imaging apparatus includes a first navigator data processor that generates a first phase profile based on first navigator data acquired by executing a first navigator sequence, generates a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is executed, and detects a specific position in the position profile. A second navigator data processor generates a second phase profile based on second navigator data acquired by executing a second navigator sequence, detects the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquires the same as its corresponding position data.
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Citations
20 Claims
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1. A magnetic resonance imaging apparatus configured to acquire magnetic resonance signals from a navigator area containing a plurality of body-moved regions of a subject as first navigator data by repeatedly executing a first navigator sequence to acquire magnetic resonance signals from the navigator area as second navigator data by repeatedly executing a second navigator sequence, to acquire magnetic resonance signals from an imaging area at the subject as imaging data using an imaging sequence, the imaging data based on the positions of the plurality of regions obtained from the second navigator data, the positions based on the first navigator data, and to generate an image, based on the raw data, said magnetic resonance imaging apparatus comprising:
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a first navigator data processor configured to; generate a phase profile for each of the first navigator data as a first phase profile with respect to each of the first navigator data; detect a position of each region with respect to each first phase profile; generate a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is repeatedly executed; and detect a specific position in the position profile; a second navigator data processor configured to; generate a phase profile for each of the second navigator data as a second phase profile with respect to each of the second navigator data; detect the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile; and acquire the same as its corresponding position data; and a raw data acquiring unit configured to acquire imaging data as raw data, the imaging data obtained by the imaging sequence corresponding to the second navigator sequence, based on the position data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image generating method comprising:
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repeatedly executing a first navigator sequence for acquiring magnetic resonance signals from a navigator area containing body-moved regions of a subject as first navigator data; repeatedly executing a second navigator sequence for acquiring magnetic resonance signals from the navigator area as second navigator data; executing an imaging sequence for acquiring magnetic resonance signals from an imaging area at the subject as imaging data, based on the positions of the regions obtained from the second navigator data, based on the first navigator data, thereby acquiring the imaging data as raw data; generating a phase profile for each of the first navigator data as a first phase profile with respect to each of the first navigator data; detecting a position of each region with respect to each first phase profile; generating a position profile indicative of a relationship between a plurality of region positions and time at which the first navigator sequence is repeatedly executed; detecting a specific position in the position profile; generating a phase profile for each of the second navigator data as a second phase profile with respect to each of the second navigator data; detecting the position of each region with respect to each second phase profile within a reference range set so as to contain the specific position, based on each second phase profile, and acquiring the same as its corresponding position data; and acquiring the imaging data as raw data, based on the position data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification