Time-resolved 3D phase-contrast MRI can be applied to quantify muscle contraction. 3D coverage with sufficient spatiotemporal resolution (~3x3x5mm3, 160ms) can only be achieved by interleaved acquisitions during many repetitions of a motion task, resulting in long scan times (>10min). In this study we have developed an accelerated protocol, using k-space undersampling and compressed-sensing reconstruction, which was applied on the lower leg of 4 volunteers performing a foot plantar-dorsal flexion motion task. Muscle velocities during the motion cycle of fully-sampled and accelerated protocols were compared. Acceleration was successful up to 6.4X with comparable velocities, which confirmed the benefit of this approach.
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