Abstract: In some embodiments, the systems and methods of the disclosure can rapidly and accurately determine the level of susceptibility of a sample to one or more antimicrobial agents using measured topography of that sample. The method may include providing a container including one or more sites having a sample and one or more concentrations of one or more antimicrobial agents. The method may include determining one or more metrics of at least a region of each site using the topographic surface profile for each site. The one or more metrics may include one or more of volumetric, distribution, spatial correlation, among others, or a combination thereof. The method may include determining one or more indices representing a level of susceptibility of the sample to the concentration of the one or more antimicrobial agents provided in each site using the one or more metrics for that site from one or more indices.