Keywords: Interventional Devices, Interventional Devices, Arterial Spin Labeling
Motivation: Intra-Arterial-Spin Labeling (iASL) could offer an alternative for myocardial perfusion measurements without the use of contrast agents by labeling blood with a catheter transmit RF-coil.
Goal(s): To study the parameters influencing the iASL labeling efficiency inside the artery to improve the SNR.
Approach: The complex iASL process is investigated with simulations and in-vitro measurements for different coil geometries (solenoid, loop), driving currents, coil orientations relative to the magnetic field, and blood flow velocities.
Results: The simulations were in good agreement with measurements, show a maximal mean flip angle created by the labeling pulse of 105°, and a threshold behavior for the transmit current.
Impact: The improvement of the labeling process inside coronary arteries started in this study, is an important step towards making ASL a viable method for myocardial perfusion quantification.
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