MRI apparatus
First Claim
1. A Magnetic Resonance Imaging (MRI) apparatus comprising:
- a flip-angle setting unit that sets a flip angle of a fat-suppression pulse, based on (a) plural possible fat-suppression levels and (b) at least one scanning condition of an MRI scan to which a fat-signal suppression method is to be applied;
a transmitting-receiving unit that creates a fat-suppression pulse having the set flip angle;
a sequence control unit that controls irradiation of the fat-suppression pulse and application of a spoiler gradient magnetic field to a scan target portion of a subject, and suppresses an MR signal generated from fat tissue in the scan target portion to a predetermined magnitude corresponding to one of said plural possible fat-suppression levels; and
an image-data creating unit that creates image data based on MR signals collected by applying an MRI pulse sequence to the scan target portion in which the MR signal from the fat tissue is suppressed.
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Accused Products
Abstract
A flip-angle calculating unit calculates a flip angle of a fat-suppression pulse by inputting scanning parameters read from a scanning-parameter storage unit based on scanning conditions set by a scan-condition setting unit and a desired fat-suppression level, into a predetermined computing program. A control unit suppresses fat signals to a desired level by performing irradiation of a fat-suppression pulse having the calculated flip angle and application of a spoiler gradient magnetic field onto a scan target portion of a subject by controlling a gradient magnetic-field generating unit and a transmitting-receiving unit, and further performs irradiation of an RF pulse and application of a gradient magnetic field in accordance with a predetermined pulse sequence, thereby detecting water signals and suppressed fat signals as MR signals. An image-data creating unit creates image data by reconstructing the MR signals.
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Citations
25 Claims
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1. A Magnetic Resonance Imaging (MRI) apparatus comprising:
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a flip-angle setting unit that sets a flip angle of a fat-suppression pulse, based on (a) plural possible fat-suppression levels and (b) at least one scanning condition of an MRI scan to which a fat-signal suppression method is to be applied; a transmitting-receiving unit that creates a fat-suppression pulse having the set flip angle; a sequence control unit that controls irradiation of the fat-suppression pulse and application of a spoiler gradient magnetic field to a scan target portion of a subject, and suppresses an MR signal generated from fat tissue in the scan target portion to a predetermined magnitude corresponding to one of said plural possible fat-suppression levels; and
an image-data creating unit that creates image data based on MR signals collected by applying an MRI pulse sequence to the scan target portion in which the MR signal from the fat tissue is suppressed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An MRI apparatus comprising:
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a fat-suppression level input unit that receives an input of a fat-suppression level of an MRI scan to which a fat-signal suppression method is applied; a scanning-condition setting unit that sets a parameter of a fat-Suppression condition for fat suppression, based on a scanning condition of the MRI scan and the fat-suppression level selected from among a plurality of fat-suppression levels through the fat-suppression input unit;
a sequence control unit that controls irradiation of a fat-suppression pulse with the set parameter and application of a spoiler gradient magnetic field to a scan target portion of a subject, and suppresses an MR signal generated from fat tissue in the scan target portion to a predetermined magnitude; and an image-data creating unit that creates image data based on MR signals collected by applying a certain pulse sequence to the scan target portion in which the MR signal from the fat tissue is suppressed. - View Dependent Claims (22, 23, 24, 25)
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Specification