Captor™ is a label-free, microfiltration system for isolation, enumeration, and retrieval of circulating tumor cells (CTCs). Captor™ system utilizes a proprietary Clear Cell™ CTChip® technology based on sophisticated fluid dynamics and myriads of crescent-shaped microwells to ensure capturing of CTCs while leaving other whole blood constituents to flow through.The elegant and simplistic design maximizes CTCs isolation efficiency, purity, and function by preserving CTCs surface integrity, allowing retrieval of the viable cells in their native state.