Abstract: A system and method for an electron paramagnetic resonance imaging (EPRI) system includes a magnet configured to apply a static magnetic field to a subject to be imaged and a gradient coil configured to apply a magnetic field gradient to the static magnetic field. The system also includes a parallel plate waveguide (PPWG) configured to use a traveling wave to generate a radio frequency (RF) magnetic field over a volume of interest (VOI) in the subject to elicit EPRI data from the VOI and a processor configured to reconstruct the EPRI data into an image of the VOI.

Abstract: A system and method for determining an actual gradient field generated by a magnetic resonance imaging (MRI) system when controlled to produce a prescribed gradient field is provided. The techniques include using the prescribed gradient field, controlling the MRI system to perform a phase encoding including a gradient that is scaled along each direction desired to be measured over a selected number of encoding times and acquiring one-dimensional (1D) data using a prescribed k-space trajectory during the phase encoding. The 1D data is used to determine scaling factors between encoding times that correlate to actual k-space trajectories achieved when controlling the gradient coils to perform the phase encoding based on the desired gradient field and a report is generated that provides a measure of the actual gradient field generated when controlling the MRI system to produce the prescribed gradient field.

Abstract: A system and method for an electron paramagnetic resonance imaging (EPRI) system includes a magnet configured to apply a static magnetic field to a subject to be imaged and a gradient coil configured to apply a magnetic field gradient to the static magnetic field. The system also includes a parallel plate waveguide (PPWG) configured to use a traveling wave to generate a radio frequency (RF) magnetic field over a volume of interest (VOI) in the subject to elicit EPRI data from the VOI and a processor configured to reconstruct the EPRI data into an image of the VOI.

Abstract: A system and method for determining an actual gradient field generated by a magnetic resonance imaging (MRI) system when controlled to produce a prescribed gradient field is provided. The techniques include using the prescribed gradient field, controlling the MRI system to perform a phase encoding including a gradient that is scaled along each direction desired to be measured over a selected number of encoding times and acquiring one-dimensional (1D) data using a prescribed k-space trajectory during the phase encoding. The 1D data is used to determine scaling factors between encoding times that correlate to actual k-space trajectories achieved when controlling the gradient coils to perform the phase encoding based on the desired gradient field and a report is generated that provides a measure of the actual gradient field generated when controlling the MRI system to produce the prescribed gradient field.

Abstract: Telemetrical control of a robotic interventional device for minimally invasive surgical procedure is based on an operative interaction between a tracking sub-system, MRI sub-system, navigation sub-system and the robotic interventional device. The tracking sensor sub-system is integrated with the interventional device to produce tracking information corresponding to the robotic interventional device location in the operative site. The navigation sub-system integrates the tracking information with the real-time images of the operative site produced by the MRI sub-system, and displays the integrated information to a user, to enable the telemetrical control of the interventional device for performing an intended procedure (biopsy, tissue resection, etc.). The navigation sub-system, based on the integrated real-time tracking information and real-time images, calculates and dynamically updates coordinates of subsequent imaging slices.

Abstract: Telemetrical control of a robotic interventional device for minimally invasive surgical procedure is based on an operative interaction between a tracking sub-system, MRI sub-system, navigation sub-system and the robotic interventional device. The tracking sensor sub-system is integrated with the interventional device to produce tracking information corresponding to the robotic interventional device location in the operative site. The navigation sub-system integrates the tracking information with the real-time images of the operative site produced by the MRI sub-system, and displays the integrated information to a user, to enable the telemetrical control of the interventional device for performing an intended procedure (biopsy, tissue resection, etc.). The navigation sub-system, based on the integrated real-time tracking information and real-time images, calculates and dynamically updates coordinates of subsequent imaging slices.