and an imaging apparatus that comprises an electronic rolling shutter imager, the imaging apparatus being configured for: sequentially resetting rows of pixels of the rolling shutter imager from a first row to a last row, sequentially reading charge accumulated at the rows of pixels from the first row to the last row, wherein the first row is read after resetting the last row, controlling the illumination source to illuminate the tissue of the subject for an illumination period that lasts longer than a vertical blanking period, wherein the vertical blanking period is the period from the resetting of the last row to the reading of the first row, and wherein the illumination period ends at or after an end of the vertical blanking period, and generating an image frame from the readings of charge accumulated at the rows of pixels, wherein at least one reading of charge accumulated at a row of pixels is removed or replaced to generate the image frame.