Fig. 10
![Fig. 10](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40658-022-00452-4/MediaObjects/40658_2022_452_Fig10_HTML.png)
Images at the highest CNR from Patient 4. Comparison between vendor, OSEM, OSEM-PSF, HKEM and FHKEM frozen at the 72nd sub-iteration. All images use the same scale
Images at the highest CNR from Patient 4. Comparison between vendor, OSEM, OSEM-PSF, HKEM and FHKEM frozen at the 72nd sub-iteration. All images use the same scale