Streak artifact reduction in magnetic resonance imaging

US11435419B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Sajan Goud Lingala · Hickory Corner, US
• Boris Mailhe · Plainsboro, US
• Nirmal Janardhanan · Monmouth Junction, US
• Jyotipriya Das · Plainsboro, US
• Robert Grimm · Nuremberg, DE
• Marcel Dominik Nickel · Herzogenaurach, DE
• Mariappan S. Nadar · Plainsboro, US

Key dates

• Filing date: May 10, 2018
• Grant date: Sep 6, 2022
• Expiry date: Apr 23, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/10096
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For radial sampling in magnetic resonance imaging (MRI), a rescaling factor is determined from k-space data for each coil. The rescale factor is inversely proportional to the streak energy in the k-space data. The k-space data from the coils is rescaled for reconstruction, such as weighting the k-space data by the rescale factor in a data consistency term of iterative reconstruction. The rescale factor is additionally or alternatively used to determine a correction field for correction of intensity bias applied to intensities in the image-object space after reconstruction. These approaches may result in a diagnostically useful bias-corrected image with reduced streak artifact while benefiting from the efficient computation (i.e., computer operates to reconstruct more quickly).