Rigid-body motion correction in hybrid PET/MRI using spherical navigator echoes
Abstract
Integrated positron emission tomography and magnetic resonance imaging (PET/MRI) is an imaging technology that provides complementary anatomical and functional information for medical diagnostics. Both PET and MRI are highly susceptible to motion artifacts due, in part, to long acquisition times. The simultaneous acquisition of the two modalities presents the opportunity to use MRI navigator techniques for motion correction of both PET and MRI data. For this task, we propose spherical navigator echoes (SNAVs)—3D k-space navigators that can accurately and rapidly measure rigid body motion in all six degrees of freedom.
- Publication:
-
Physics in Medicine and Biology
- Pub Date:
- April 2019
- DOI:
- 10.1088/1361-6560/ab10b2
- Bibcode:
- 2019PMB....64hNT03J
- Keywords:
-
- PET/MRI;
- motion correction;
- navigators