1. An automated method for detecting circulating tumor cells in a microscopic image of a blood sample, the method comprising: receiving, by a computer, a plurality of low-resolution images, each low resolution image providing a representation of the blood sample with one of a plurality of stains applied; determining, by the computer, a threshold value for each of the plurality of stains based on the low resolution images; identifying, by the computer, a list of potential cells based on the threshold values; performing, by the computer, a gating process on the list of potential circulating tumor cells to identify one or more likely or highly likely circulating tumor cells; and presenting, by the computer, the subset of the low-resolution images in a verification interface comprising one or more components allowing a user to confirm that a respective low-resolution image included in the subset of the low-resolution images includes one or more circulating tumor cells.