One main source of artifact is relative motion between the sensor and sample during clinical measurements. To simulate this, the source of illumination can be moved while the camera and sample remain stationary. As can be seen in the setup, Fig 2, the laser diode is attached to the shaker which creates a linear movement. In this case, we use the laser diode as the source of illumination for generating speckle images and at the same time as a source of generating motion induced artifacts. The movement of the shaker causes different parts of the sample to be illuminated, thus creating a different distance between the light source and detector. This causes the optical depth which is traveled through the sample at different locations to change.