Keywords: Myocardium, Cardiovascular, Myocardial Perfusion Imaging
Motivation: As perfusion images are typically acquired over 60 heart beats, respiratory motion is unavoidable. Motion compromises spatio-temporal reconstructions.
Goal(s): Residual undersampling artifacts and contrast variation make deformation field estimation challenging. This work aims to get an accurate deformation field from the auxiliary reconstruction and incorporate it into the forward reconstruction model to improve perfusion images.
Approach: To obtain high-quality images for motion estimation, the fixed-angle spiral navigator is used to extract temporal basis. The rigid and non-rigid motion corrections are jointly incorporated into the subspace reconstruction.
Results: Motion-corrected whole-heart first-pass spiral myocardial perfusion imaging with a high resolution of 1.3 mm2 is achieved.
Impact: The proposed navigator-guided subspace motion correction reconstruction pipeline substantially improves the image quality, sharpness, and alignment of the 1.3mm² high-resolution spiral myocardial perfusion imaging, benefiting voxel-wise perfusion quantification crucial for assessing ischemic heart disease.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords