Fig. 1From: Quantum iterative reconstruction on a photon-counting detector CT improves the quality of hepatocellular carcinoma imagingModulation transfer functions (MTF) and noise power spectra (NPS) of the quantum iterative reconstruction (QIR) levels. Level 0 shows the results for the filtered back projection reconstruction. Caused by the almost perfect overlap, the MTFs of QIR level 0 – 2 are not visibleBack to article page