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Improved low-contrast resolution after MENLM filtering (right) comparing to the FBP image (left). Arrows indicate the locations of low-contrast objects (top: 6mm rods; Bottom: 5mm rods).The mean and standard deviation of CT numbers inside the dotted ROI were 99.3±5.5 (left) and 98.6±1.0 HU (right), respectively. W/L = 100/100 HU.
