Abstract: An apparatus is disclosed that includes a switchable optical filter having a layer of switchable material; a light source providing light of a wavelength that causes the switchable material to transition from a faded state to a dark state, or a dark state to a faded state; and a switch for controlling activation of the light source.

Abstract: A further exemplary embodiment of the present disclosure can be, for example, a coil arrangement, which can include a loops including a plurality of first conductors extending in a first direction; a plurality of second conductors extending in a second direction, where the first direction is different from the second direction, and a plurality of linking points linking the first conductors to the second conductors, where the loop(s) can be configured to stretch in a third direction, and a perimeter of the loop is constant. The third direction can be different from the first and second directions, or it can be the same as the first direction or the second direction. The linking points can mechanically and pivotally connect the first conductors to the second conductors. The linking points can include flexible conductors, or the linking points can link the first conductors and the second conductors to a substrate. The substrate can be a trellis substrate.

Abstract: In a magnetic resonance (MR) apparatus and a method for operation thereof, the radio-frequency (RF) resonator of the scanner of the apparatus fed from a single RF source and is operated, during a total scan duration for acquiring MR scan data from a subject, so as to excite nuclear spins in the subject with respective RF fields having different B1+ field profiles that are radiated at respectively different times during the acquisition of the scan data. The scan data acquired during the scan thus are produced from MR signals caused by nuclear spins excited by at least two different B1+ field profiles. The scan can be used to acquire MR data for MR fingerprinting.

Abstract: A further exemplary embodiment of the present disclosure can be, for example, a coil arrangement, which can include a loops including a plurality of first conductors extending in a first direction; a plurality of second conductors extending in a second direction, where the first direction is different from the second direction, and a plurality of linking points linking the first conductors to the second conductors, where the loop(s) can be configured to stretch in a third direction, and a perimeter of the loop is constant. The third direction can be different from the first and second directions, or it can be the same as the first direction or the second direction. The linking points can mechanically and pivotally connect the first conductors to the second conductors. The linking points can include flexible conductors, or the linking points can link the first conductors and the second conductors to a substrate. The substrate can be a trellis substrate.

Abstract: In a magnetic resonance (MR) apparatus and a method for operation thereof, the radio-frequency (RF) resonator of the scanner of the apparatus fed from a single RF source and is operated, during a total scan duration for acquiring MR scan data from a subject, so as to excite nuclear spins in the subject with respective RF fields having different B1+ field profiles that are radiated at respectively different times during the acquisition of the scan data. The scan data acquired during the scan thus are produced from MR signals caused by nuclear spins excited by at least two different B1+ field profiles. The scan can be used to acquire MR data for MR fingerprinting.

Abstract: An exemplary coil arrangement can be provided that can include a lateral coil array(s) configured to transmit a set of tailored pulses, and a contralateral coil array(s) configured to transmit the pulses. The lateral coil array(s) and the contralateral coil(s) array can be substantially identical. The pulses can include a set of radio frequency tailored pulses. The lateral coil array(s) and the contralateral coil array(s) can be further configured to transmit a radio frequency shim. A radio frequency shield can be included which can he associated with one of the arrays, and can be located between medial coils. The set of tailored pulses can be parallel pulses. The coil arrangement can be configured to be used at at least about 7 Tesla. The lateral coil array(s) can include at least 2 lateral coils. The contralateral coil array(s) can include at least 2 contralateral coils.

Abstract: Exemplary embodiments of the present disclosure include dipole arrangement, or an array of dipole arrangements which can include at least two poles extending in opposite direction from one another, each of the poles including capacitor and an inductor(s). A lattice balun can be located at a center gap between the poles, and can be a 50 ohm lattice balun. The capacitor(s) can be a 10.67 farad capacitor. The inductor can be a 26.7 Henry inductor. The length of each of the poles can depend on a wavelength of a magnetic field generated by the dipole arrangement, or it can depend on a distance from the dipole arrangement to a subject to be imaged.

Abstract: An MRI rf coil array is comprised of a large number of separate coil elements that are supported on a substrate that is shaped to the contour of the anatomy being imaged. The coil elements overlap each other to reduce mutual inductance and their location is determined by tiling the surface of the substrate with regular, substantially same sized polygons. The center of each coil element is aligned with the center of a polygon. By using a mixture of different polygons, such as hexagons and pentagons, an arrangement of coil elements may be formed that cover a surface with non-zero Gaussian curvature where each coil is overlapped with its neighbors such that their mutual inductance is nulled.

Abstract: A multi-element MRI head coil is formed in the shape of a helmet that fits over the head of a subject to be imaged. The coil elements are separately driven by rf transmit channels during an MR scan to shape the rf fields produced in the region of interest. The head coil can be used in the transmit only phase of the scan, or it can be used in both the transmit and receive phases.