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We present the experimental and numerical results of two-dimensional x-ray imaging due to fast electron transport in a solid target.A 40-μm-thick copper film target is irradiated by a 100m J,50rs normal incident laser pulse.The full width at half maximum of the x-ray photon dose is 25μm,and the divergence angle of fast electrons is 25°-30°,which is detected by the pin-hole x-ray imaging technique.The target surface plasma layer is compressed by a ponderomotive force into a depth of 0.2λ.The plasma wave accompanied by fast electrons transporting into the target is studied by dividing the plasma into layers in a radial direction.A narrow fast electron channel,which is approximately 8μm-10μm in width,mainly contributes to the x-ray dose.