MAGNETIC RESONANCE IMAGING APPARATUS, MAGNETIC RESONANCE IMAGING METHOD, AND MEDICAL DATA ANALYSIS APPARATUS

• US 20150160316A1
• Filed: 12/04/2014
• Published: 06/11/2015
• Est. Priority Date: 12/06/2013
• Status: Active Grant

• Current Assignee: Toshiba Medical Systems Corporation (Canon Inc.)
• Original Assignee: Toshiba Medical Systems Corporation (Canon Inc.), Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: UMEDA, Masaaki
• Granted Patent: US 10,254,363 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 33/4625 Processing of acquired signals, e.g. elimination of phase errors, baseline fitting, chemometric analysis
• CPC Class Codes: G01R 33/4828 Resolving the MR signals of different chemical species, e.g. water-fat imaging
• CPC Class Codes: G01R 33/5607 by reducing the NMR signal of a particular spin species, e.g. of a chemical species for fat suppression, or of a moving spin species for black-blood imaging

Abstract

According to one embodiment, a magnetic resonance imaging apparatus includes a data acquiring part and a data processing part. The data acquiring part is configured to acquire magnetic resonance signals for a magnetic resonance spectroscopy analysis from an object. The data processing part is configured to obtain a frequency spectrum of magnetic resonance signals whose first magnetic resonance signal component from a first metabolite and second magnetic resonance signal component from a second metabolite have been suppressed by data processing of the magnetic resonance signals acquired by said data acquiring part. The data processing suppresses the first magnetic resonance signal component and the second magnetic resonance signal component.

Claims

1. A magnetic resonance imaging apparatus comprising:

a data acquiring part configured to acquire magnetic resonance signals for a magnetic resonance spectroscopy analysis from an object; and

a data processing part configured to obtain a frequency spectrum of magnetic resonance signals whose first magnetic resonance signal component from a first metabolite and second magnetic resonance signal component from a second metabolite have been suppressed by data processing of the magnetic resonance signals acquired by said data acquiring part, the data processing suppressing the first magnetic resonance signal component and the second magnetic resonance signal component.

2. A magnetic resonance imaging apparatus of claim 1, further comprising:

a designating part configured to designate at least one of the first metabolite and the second metabolite.

3. A magnetic resonance imaging apparatus of claim 1,

wherein said data processing part is configured to perform a phase correction of magnetic resonance signals whose center frequency is a resonant frequency of the first metabolite and suppress the second magnetic resonance signal component using magnetic resonance signals after the phase correction, the phase correction making the center frequency to a resonant frequency of the second metabolite.

4. A magnetic resonance imaging apparatus of claim 1,

wherein said data processing part is configured to suppress the first magnetic resonance signal component by first processing and the second magnetic resonance signal component by second processing, the first processing subtracting first signals from magnetic resonance signals whose center frequency is a resonant frequency of the first metabolite, the first signals being signals after a convolution in a time domain of the magnetic resonance signals whose center frequency is the resonant frequency of the first metabolite, the second processing subtracting second signals from magnetic resonance signals after a phase correction, the second signals being signals after the convolution or another convolution in the time domain of the magnetic resonance signals after the phase correction, the phase correction being performed for magnetic resonance signals before or after suppressing the first magnetic resonance signal component, the phase correction making a center frequency of the magnetic resonance signals before the phase correction become a resonant frequency of the second metabolite.

5. A magnetic resonance imaging apparatus of claim 1,

wherein said data processing part is configured to obtain a frequency spectrum of magnetic resonance signals whose the first magnetic resonance signal component, the second magnetic resonance signal component and a third magnetic resonance signal component from a third metabolite having been suppressed by data processing further including processing for suppressing the third magnetic resonance signal component of the magnetic resonance signals acquired by said data acquiring part.

6. A magnetic resonance imaging apparatus of claim 5,

wherein said data processing part is configured to perform data processing including a phase correction for making a center frequency of magnetic resonance signals become a resonant frequency of the second metabolite and another phase correction for making a center frequency of magnetic resonance signals become a resonant frequency of the third metabolite.

7. A magnetic resonance imaging apparatus of claim 1,

wherein said data processing part is configured to obtain a frequency spectrum of magnetic resonance signals whose water signals and fat signals having been suppressed by data processing including first subtraction processing, a first phase correction, second subtraction processing, a second phase correction, and a Fourier transform of magnetic resonance signals after the second phase correction, the first subtraction processing suppressing the water signals by subtracting first signals from the magnetic resonance signals acquired by said data acquiring part, the first signals being signals after a convolution in a time domain of the magnetic resonance signals acquired by said data acquiring part, the first phase correction making a center frequency of magnetic resonance signals after the first subtraction processing become a resonant frequency of the fat signals, the second subtraction processing suppressing the fat signals by subtracting second signals from magnetic resonance signals after the first phase correction, the second signals being signals after the convolution or another convolution in the time domain of the magnetic resonance signals after the first phase correction, the second phase correction making a center frequency of magnetic resonance signals after the second subtraction processing become the resonant frequency of the removed water signals.

8. A magnetic resonance imaging apparatus of claim 1,

wherein said data processing part is configured to perform data processing for suppressing a magnetic resonance signal component from water and a magnetic resonance signal component from fat.

9. A magnetic resonance imaging method comprising:

acquiring magnetic resonance signals for a magnetic resonance spectroscopy analysis from an object; and

obtaining a frequency spectrum of magnetic resonance signals whose first magnetic resonance signal component from a first metabolite and second magnetic resonance signal component from a second metabolite have been suppressed by data processing of the acquired magnetic resonance signals, the data processing suppressing the first magnetic resonance signal component and the second magnetic resonance signal component.

10. A medical data analysis apparatus comprising:

a data obtaining part configured to obtain magnetic resonance signals for a magnetic resonance spectroscopy analysis, the magnetic resonance signals having been acquired from an object; and

a data processing part configured to obtain a frequency spectrum of magnetic resonance signals whose first magnetic resonance signal component from a first metabolite and second magnetic resonance signal component from a second metabolite have been suppressed by data processing of the magnetic resonance signals obtained by said data obtaining part, the data processing suppressing the first magnetic resonance signal component and the second magnetic resonance signal component.