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Over the past years, x\u2010ray small\u2010angle scattering was studied as a new contrast mechanism to enhance subtle structural variation within the soft tissue. In this paper, we present a detection method to extract this type of x\u2010ray scattering data, which are also referred to as dark\u2010field signals. The key idea is to acquire an x\u2010ray projection multiple times with varying collimation before an x\u2010ray detector array. The projection data acquired with a collimator of a sufficiently high collimation aspect ratio contain mainly the primary beam with little scattering, while the data acquired with an appropriately reduced collimation aspect ratio include both the primary beam and small\u2010angle scattering signals. Then, analysis of these corresponding datasets will produce desirable dark\u2010field signals; for example, via digitally subtraction. In the numerical experiments, the feasibility of our dark\u2010field detection technology is demonstrated in Monte Carlo simulation. 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