In one embodiment of the invention, a method is provided to allow an operating system to support both address space layouts of a SAS OS and a MAS OS at the same time, with the choice of which layout type to be used to be made by the application developer. The multibit phase change memory device includes a phase change material layer having a plurality of contact portions being in contact with a heating electrode, and having a plurality of active regions, each active region forming a unit phase change memory device. The piezoelectric substrate 1 is a quartz flat plate where a cut angle \u03b8 of a rotation Y cut quartz substrate is set to satisfy a range of \u221264. The IP endpoint device may be a mobile device andor a fixed device, for example. Subtracting two images or fitting a time series produces maps with minimum interference from direct water saturation and from semi-solid magnetization transfer and other fast exchanging protons.