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. 2021 Dec 15;32(5):2921–2929. doi: 10.1007/s00330-021-08438-z

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© The Author(s) 2021

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Fig. 1 — Flowchart of literature search. FBP = filtered back-projection. IR = iterative reconstruction. DLR = deep learning reconstruction. HU = Hounsfield unit. SNR = signal-to-noise ratio. CNR = contrast-to-noise ratio