  We have developed a prototype time-resolved neutron imaging detector
employing the micro-pixel chamber (muPIC), a micro-pattern gaseous detector,
coupled with a field programmable gate array-based data acquisition system for
applications in neutron radiography at high-intensity neutron sources. The
prototype system, with an active area of 10cm x 10cm and operated at a gas
pressure of 2 atm, measures both the energy deposition (via
time-over-threshold) and 3-dimensional track of each neutron-induced event,
allowing the reconstruction of the neutron interaction point with improved
accuracy. Using a simple position reconstruction algorithm, a spatial
resolution of 349 +/- 36 microns was achieved, with further improvement
expected. The detailed tracking allows strong rejection of background
gamma-rays, resulting in an effective gamma sensitivity of 10^-12 or less,
coupled with stable, robust neutron identification. The detector also features
a time resolution of 0.6 microseconds.
