A backside illuminated imaging sensor includes a semiconductor layer and an infrared detecting layer. The data may then be processed to determine magnetic field homogeneity of the MRI system. The method may include generating a graph having a plurality of nodes and at least one edge, wherein the at least one edge includes a first end connected to a first node and a second end connected to a second node. The second open end engages with an outer side of the rubber collar. The anchor clip resembles a standard tongue of a standard seat belt. The telescopic shutter is collectedstretched when the distributor is vertically moved.