A memory module having a board and a plurality of memory elements on the board which belong to different memory ranks, each memory rank being addressable via a respective selection signal. The grille including plates positioned opposite the chest of the patient when the breast is positioned in a positioning region, and which are angled to converge towards the same region proximal to the X-ray source. The address of the Anchor MSC is obtained using the MSCID contained within the BillingID parameter of a FacilitiesDirective message received by the tandem MSC directly connected to the serving MSC prior to initiating the handoff back operation. The intermediate shaft and the output shaft can be coupled together by a second clutch of the double clutch. Each inner roller may optionally have a convex outer surface. The transfer client then sends a read event message to the remote transfer server which includes Session ID obtained from the remote transfer server.