System and method of receive sensitivity correction in MR imaging
AssigneeGeneral Electric Company
InventorsMohammad Mehdi Khalighi, Brian Rutt
Life of this patent
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Abstract
A magnetic resonance imaging (MRI) apparatus includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images, and a computer programmed to generate an original image of an object, generate a proton density weighted image of the object, generate a B1+ field map of the object, generate a transmit-corrected image based on the B1+ field map and based on the proton density weighted image, electronically filter the transmit-corrected image to generate a receive sensitivity map, and revise the original image using the receive sensitivity map.
Claims20
A magnetic resonance imaging (MRI) apparatus comprising:
- a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images;
- and
- a computer programmed to:
- generate an original image of an object;
- generate a proton density weighted image of the object;
- generate a B1+ field map of the object;
- generate a transmit-corrected image based on the B1+ field map and based on the proton density weighted image;
- electronically filter the transmit-corrected image to generate a receive sensitivity map;
- and
- revise the original image using the receive sensitivity map to yield a final image.
A method of magnetic resonance imaging (MRI) comprising:
- generating a proton density weighted image of an object;
- determining a transmit sensitivity map from a B1+ field map of the object;
- generating a transmit-corrected image of the object based on the transmit sensitivity map and based on the proton density weighted image;
- low-pass filtering the transmit-corrected image to generate a receive sensitivity map;
- and
- correcting an MR image using the receive sensitivity map to yield a final image.
A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which, when executed by a computer, cause the computer to:
- generate an original image of an object;
- obtain an MR image of an object;
- obtain a proton density weighted image of the object;
- obtain a B1+ field map of the object;
- generate a transmit-corrected image based on the B1+ field map and based on the proton density weighted image;
- electronically filter the transmit-corrected image to generate a receive sensitivity map;
- and
- refine the original image using the receive sensitivity map to generate a final image having reduced image artifacts.
Dependencies are inferred from the claim text.