To increase the frequency of input of image signals, a pixel portion of a liquid crystal display device is divided into a plurality of regions, and input of image signals is controlled in each of the plurality of regions. The system includes a floating valve having a density less than a first fluid and greater than a second fluid. A plurality of MR signals are detected from at least one radiofrequency coil array for a given field-of-view within the MRI system as the positioning device is translated.