Method and magnetic resonance apparatus for recording magnetic resonance data using a bSSFP sequence

• US 10,670,683 B2
• Filed: 06/21/2017
• Issued: 06/02/2020
• Est. Priority Date: 06/21/2016
• Status: Active Grant

• Current Assignee: Siemens Healthineers AG (Siemens AG)
• Original Assignee: Siemens Healthcare GMBH (Siemens AG)
• Inventors: Paul, Dominik
• Primary Examiner(s): Hollington, Jermele M
• Application Number:
  US15/628,991
• Publication Number:
  US 20170363701A1
• Time in Patent Office: 1,077 Days
• Field of Search: None
• CPC Class Codes: G01R 33/482 using a Cartesian trajectory
• 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
• CPC Class Codes: G01R 33/5614 using a fully balanced steady-state free precession [bSSFP] pulse sequence, e.g. trueFISP
• CPC Class Codes: G01R 33/565 Correction of image distortions, e.g. due to magnetic field inhomogeneities

Abstract

In a method and magnetic resonance apparatus for recording magnetic resonance data using a bSSFP sequence, a k-space line to be scanned in k-space is divided into at least two line sections, with at least two of the at least two line sections being scanned separately in different repetitions of the sequence.

Claims

1. A method for recording magnetic resonance (MR) data, comprising:

using a control computer to operate an MR data acquisition scanner to acquire MR data by executing multiple repetitions of a bSSFP sequence;

using said control computer to enter the acquired MR data into an electronic memory organized as k-space comprising a plurality of k-space lines in said electronic memory, by dividing a k-space line, into which said acquired MR data are to be entered, into at least two line sections, and entering the acquired MR data respectively into at least two of said at least two line sections separately in different repetitions of said bSSFP sequence, wherein said k-space line traverses an entirety of k-space into which said MR data are to be entered; and

from said control computer, making the data entered into k-space available in electronic form, as a data file.

2. A method as claimed in claim 1 comprising entering the acquired MR data into k-space by Cartesian scanning of k-space.

3. A method as claimed in claim 1 comprising entering said acquired MR data into k-space by Cartesian scanning of k-space, with said k-space line traversing an entirety of k-space into which said acquired MR data are to be entered.

4. A method as claimed in claim 1 comprising dividing said k-space line into an odd number of line sections.

5. A method as claimed in claim 1 wherein k-space exhibits Hermitian symmetry, and comprising entering the acquired data into only some of said line sections of a k-space line, and thereby producing at least one line section of the k-space line into which acquired MR data have not been entered, and filling said at least one portion of the k-space line, after acquiring said MR data, using said Hermitian symmetry of k-space.

6. A magnetic resonance (MR) apparatus comprising:

an MR data acquisition scanner;

a control computer configured to operate said MR data acquisition scanner to acquire MR data by executing multiple repetitions of a bSSFP sequence;

an electronic memory;

said control computer being configured to enter the acquired MR data into said electronic memory, organized as k-space comprising a plurality of k-space lines in said electronic memory, by dividing a k-space line, into which said acquired MR data are to be entered, into at least two line sections, and entering the acquired MR data respectively into at least two of said at least two line sections separately in different repetitions of said bSSFP sequence, wherein said k-space line traverses an entirety of k-space into which said MR data are to be entered; and

said control computer being configured to make the data entered into k-space available in electronic form, as a data file.

7. A non-transitory, computer-readable data storage medium encoded with programming instructions, said storage medium being loaded into a control computer of a magnetic resonance (MR) apparatus comprising an MR data acquisition scanner and an electronic memory, said programming instructions causing said control computer to:

operate the MR data acquisition scanner to acquire MR data by executing multiple repetitions of a bSSFP sequence;

enter the acquired MR data into the electronic memory, organized as k-space comprising a plurality of k-space lines in said electronic memory, by dividing a k-space line, into which said acquired MR data are to be entered, into at least two line sections, and entering the acquired MR data respectively into at least two of said at least two line sections separately in different repetitions of said bSSFP sequence, wherein said k-space line traverses an entirety of k-space into which said MR data are to be entered; and

make the data entered into k-space available in electronic form, as a data file.