Abstract: Example devices and methods of MRI scanning are disclosed herein. In an example, an MRI scanning system may include a structure defining a bore within which a subject is to be positioned for scanning. The system may also include a magnet to generate a primary magnetic field within the bore parallel to a longitudinal axis of the bore, and a helical-antenna radio-frequency (RF) coil oriented along the longitudinal axis to surround the subject. In addition, the system may include an RF signal generator to drive the helical-antenna RF coil to generate a circularly polarized (CP) RF magnetic field perpendicular to the longitudinal axis, as well as an RF detector to detect a response signal generated by tissues of the subject in response to the CP RF magnetic field. Also included may be a computing system to create an image of the tissues of the subject based on the detected response signal.

Abstract: Selection-focus coils de-signed for 3D FFL-based MPI may allow for spatial encoding without additional shift coils and provide relatively large FOV and field gradient with very flat FFL. Additionally, a single-sided FFL-based device which is capable of 3D imaging is disclosed. With sufficient current amplitudes, FFL could encode the whole volume of a small animal or penetrate deep into human organs such as the vascular system or lymph nodes. An MPI device based on the proposed selection scheme could be a compact and robust alternative to the state-of-the-art FFP (FFL)-based MPI scanners.

Abstract: Selection-focus coils de-signed for 3D FFL-based MPI may allow for spatial encoding without additional shift coils and provide relatively large FOV and field gradient with very flat FFL. Additionally, a single-sided FFL-based device which is capable of 3D imaging is disclosed. With sufficient current amplitudes, FFL could encode the whole volume of a small animal or penetrate deep into human organs such as the vascular system or lymph nodes. An MPI device based on the proposed selection scheme could be a compact and robust alternative to the state-of-the-art FFP (FFL)-based MPI scanners.

Abstract: Example devices and methods of MRI scanning are disclosed herein. In an example, an MRI scanning system may include a structure defining a bore within which a subject is to be positioned for scanning. The system may also include a magnet to generate a primary magnetic field within the bore parallel to a longitudinal axis of the bore, and a helical-antenna radio-frequency (RF) coil oriented along the longitudinal axis to surround the subject. In addition, the system may include an RF signal generator to drive the helical-antenna RF coil to generate a circularly polarized (CP) RF magnetic field perpendicular to the longitudinal axis, as well as an RF detector to detect a response signal generated by tissues of the subject in response to the CP RF magnetic field. Also included may be a computing system to create an image of the tissues of the subject based on the detected response signal.