Abstract: In an example, a method includes controlling electrical current to an actuation coil disposed about an elongate flexible body of a device within a field of view of magnetic resonance (MR) imaging system. The MR imaging system can be controlled to provide radio frequency pulses at one or more off-resonant frequencies to excite off-resonance spins near the actuation coil, such that the acquired MR data is representative of the off-resonance excitation. MR data can be provided based on MR signals acquired by the MR imaging system, in which at least some of the MR data includes the MR signals with the device within the field of view. Images can be reconstructed based on the MR data to provide reconstructed image data and localization data can be provided representative of at least one of a location, orientation and/or shape of the device based on the reconstructed image data.

Abstract: In a coherent magnetic resonance imaging method, a plurality of slices (70, 72; 170, 172) are each prepared (74, 76) in a steady spin state. Time domain multiplexed readouts (80, 82) are performed. Each readout acquires magnetic resonance data corresponding to one of the steady spin state slices. Radio frequency excitation pulses (120, 122) are interleaved with the time domain multiplexed readout pulses (102, 112) to maintain the steady spin states of the slices. The acquired magnetic resonance data are reconstructed (62) to produce reconstructed images corresponding to the plurality of slices.

Abstract: A treatment system (1600, 1900) is provided for traversing the alimentary tract. The system (1600, 1900) includes an ingestible capsule, which includes a gas pressurizing module (1602)) providing a gas and at least one balloon (1604, 1901) in fluid communication with the gas pressurization module (1602). The capsule further includes an exhaust channel (1610) in fluid communication with a respective balloon of the at least one balloon (1604, 1901), and a depressurizing closure member (1608) for selectively controlling flow of gas between the balloon (1604, 1901) and the ambient surroundings of the capsule. The system further includes control circuitry (906) for controlling the depressurizing closure member (1608).

Abstract: In a coherent magnetic resonance imaging method, a plurality of slices (70, 72; 170, 172) are each prepared (74, 76) in a steady spin state. Time domain multiplexed readouts (80, 82) are performed. Each readout acquires magnetic resonance data corresponding to one of the steady spin state slices. Radio frequency excitation pulses (120, 122) are interleaved with the time domain multiplexed readout pulses (102, 112) to maintain the steady spin states of the slices. The acquired magnetic resonance data are reconstructed (62) to produce reconstructed images corresponding to the plurality of slices.

Abstract: A method for fat-suppressed imaging is disclosed. Such a method may include storing a first spectral component of an echo signal formed at TR/2 from a sample, suppressing a second spectral component of the echo signal at TR/2, re-exciting the stored spectral component after suppressing the second spectral component, and producing an image of the sample based on the re-excited stored spectral component.