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A magnification view of the black circle (a) shows the radiopaque pump identifier consisting of the logo of the manufacturer and three alphabetic letters (white arrow) with visible electronics (b) into the left-hand side (black arrow). For (some) odd rotations of the pump to the vertical axis (Twiddler’s syndrome), the pump is located on the head, which can be recognised by the logo in mirror image, and the electronics to the right-hand side (c)
