Low-dose CT reconstruction via L1 dictionary learning regularization using iteratively reweighted least-squares

Table 5 RMSEs (HU) of reconstructed images of different noise levels

Phantom	L₁-DL	ADSIR	GPBB	SART
Shepp–Logan
60 views, 2 million photons	10.87	31.3715	14.78	139.4
60 views, 1 million photons	11.68	34.84	15.43	139.9
Head slice
180 views, 2 million photons	13.46	24.81	9.582	22.86
90 views, 2 million photons	16.83	30.54	16.83	44.49

ISSN: 1475-925X