This disclosure provides an implantable medical device comprising a power source a therapy module that includes at least one energy storage component, and a charging module coupled between the power source and the therapy module. The piezoelectric element 31 is fixedly attached to electrodes 33 by electrically conductive adhesive 32. A comparator can be included to compare the sampled first data set with the second data set generated by the receiver LFSR and provide a signal to the receiver LFSR to adjust a phase of the receiver LFSR until the second data set is substantially the same as the first data set. The pivoting plate is adapted to pivot upward for storage and the band assembly is adapted to pivot downward for storage. Optionally, the apparatuses further include a stand andor collapsible legs to further support the hopper. The method may also include positioning the shielding curtain to cover an opening of a scanner.