Final answer:
To minimize or eliminate Moire artifact in a flat panel image detector fluoroscopy system, a scatter radiation absorption grid can be positioned in a diagonal relationship to the FPD.
Step-by-step explanation:
To minimize or eliminate the Moire (aliasing) artifact in a flat panel image detector fluoroscopy system, a scatter radiation absorption grid can be positioned in a diagonal relationship to the FPD (Flat Panel Detector). This positioning helps to reduce the interference pattern caused by the grid and the detector, thereby minimizing the Moire artifact. Using a scatter radiation absorption grid in a parallel relationship with the FPD can actually worsen the Moire artifact.