An imaging system includes an image sensor and a mechanical shutter which controls the termination of exposure of the image sensor. One screen displays a primary game and the other two screens preferably display pay tables, a secondary game, or artwork related to the primary andor secondary game. The input circuit includes a first part coupled to the first node and an inverter coupled to the second node. If semen is present in the test sample, a colored line will appear at the test station and at the control station. The jet cutting tools permit the arms to be extended, retracted, and re-extended or redeployed multiple times without the need for being retrieved from the wellbore. As such, they may be useful for the treatment of disorders of the central andor peripheral nervous system.