and scanning optics third dynamic focus tracking can be achieved by adding a crystal or small electronic actuator not shown to shift the shaft 22 to move the focal point which will increase the spatial resolution over a larger depth range fourth the motor 12 and any other electrical circuitry in the probe 10 may be remotely powered by an rf field pickup coil or antenna so that there is no direct wiring to the motor 12 in the endoscopic probe 10 thus it can now be appreciated that the invention is characterized by a motor 12 that provides the torque is at the distal end of the endoscope 10 this creates a more constant rotation and reduces image distortion due to a changing frame rate the inputting fiber 16 does not rotate at its proximal or distal base to scan as in the prior art ultrasound or oct probe the motor 12 with and without gears uses an inverted configuration i e has the motive end directed proximally instead of distally to allow the direct reflection of light from the grin lens 18 toward the tissue if the motor 12 is not mounted backwards a surface would be needed to back reflect the light which surface would be much harder to make the coupling in endoscope 10 used for scanning is performed immediately after the grin lens 18 which improves signal quality.