Fig. 5From: Value of virtual monochromatic spectral image of dual-layer spectral detector CT with noise reduction algorithm for image quality improvement in obese simulated body phantomImage noise of polychromatic image and VMI in small and large phantoms. The maximum noise gap increases as phantom size increases in all examined DRIs ([a] DRI 16, [b] DRI 19, [c] DRI 22, [d] DRI 25). DRI = dose right index, VMI virtual monochromatic spectral image, DRI dose right indexBack to article page