Method of performing magnetic resonance imaging and a magnetic resonance apparatus
AssigneesKing's College London, Siemens Healthcare GmbH
InventorsRadhouene Neji, Sebastien Roujol, Rene Botnar
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Abstract
In a method of performing magnetic resonance imaging and a magnetic resonance apparatus, first MR data are acquired of a region of interest of a subject in the absence of a B1 field. Second MR data are acquired of the region of interest in the presence of a B1 field, and within a short time interval after generation of the B1 field. The first and second MR data are processed to determine a B1 field map, and a T1 map is generated using the B1 field map. The T1 map is a B1 corrected T1 map. The first and second MR data 103, 109 may be acquired as part of a T1 mapping sequence, such as a MOLLI or SASHA type cardiac T1 mapping sequence.
Claims14
A method of performing magnetic resonance (MR) imaging, comprising:
- acquiring first MR data of a region of interest of a subject, the first MR data being acquired in the absence of a B1 field;
- acquiring second MR data of the region of interest, the second MR data being acquired in the presence of a B1 field, and within a minimal amount of time possible after generation of the B1 field;
- processing the first and second MR data to determine a B1 field map, wherein processing the first and second MR data to determine a B1 field map comprises determining the signal ratio of the first MR data to the second MR data, and using the determined signal ratio to determine the B1 field map;
- and
- generating a T1 map using the B1 field map.
A magnetic resonance (MR) apparatus comprising:
- an MR data acquisition unit to acquire first MR data of a region of interest of a subject, the first MR data being acquired in the absence of a B1 field, and to acquire second MR data of the region of interest, the second MR data being acquired in the presence of a B1 field, and within a minimal amount of time possible after generation of the B1 field;
- and
- a processor configured to process the first and second MR data to determine a B1 field map, and to generate a T1 map using the B1 field map,
- wherein the processing the first and second MR data to determine a B1 field map comprises determining the signal ratio of the first MR data to the second MR data, and using the determined signal ratio to determine the B1 field map.
A non-transitory, computer-readable data storage medium encoded with programming instructions, said storage medium being loaded into a computer system of a magnetic resonance (MR) apparatus, and said programming instructions causing said computer system to:
- operate the MR apparatus to acquire first MR data of a region of interests of a subject, said first MR data being acquired in the absence of a B1 field, and to acquire second MR data of the region of interests, said second MR data being acquired in the presence of a B1 field, and within a minimal amount of time possible after generation of the B1 field;
- process the first and second MR data to determine a B1 field map by determining the signal ratio of the first MR data to the second MR data, and using the determined signal ratio to determine the B1 field map;
- and
- generate a T1 map using the B1 field map.
Dependencies are inferred from the claim text.